FINAL DRAFT WATER MANAGEMENT AND CONSERVATION PLAN. Canby Utility. June DRAFT

Transcription

1 FINAL DRAFT WATER MANAGEMENT AND CONSERVATION PLAN Canby Utility June DRAFT

2 WATER MANAGEMENT AND CONSERVATION PLAN FOR CANBY UTILITY JUNE 2010 FINAL DRAFT Prepared by: MURRAY, SMITH & ASSOCIATES, INC. Engineers/Planners 121 SW Salmon, Suite 900 Portland, OR 97204

3 FINAL DRAFT TABLE OF CONTENTS FINAL ORDER Page Notification and Approved Final Order <<TO FOLLOW>>... Precedes EXECUTIVE SUMMARY Authorization... ES-1 Purpose... ES-1 Compliance... ES-1 Background and Study Area... ES-1 Existing System Description and Service Area... ES-2 Supply Sources... ES-2 Water Requirements... ES-2 Service Area and Population... ES-2 Historical Water Usage... ES-2 Population Forecasts... ES-3 Water Demand Projections... ES-3 Progress Report Related to Previous WMCP... ES-3 Current and Proposed Water Conservation Program... ES-4 Curtailment Strategy... ES-4 Comparison of Water Demands and Available Source... ES-4 Summary... ES-5 1. INTRODUCTION Purpose Compliance Scope of Work WATER SUPPLIER DESCRIPTION General Background and Study Area Supply Sources Surface Water Sources Groundwater Sources Water Rights Summary Water Treatment Facilities General Treatment Plant Filter Backwash Page i Water Management and Conservation Plan June 2010 Table of Contents Canby Utility

4 FINAL DRAFT Process Instrumentation and Controls Standby Power Source Assessment Molalla River Groundwater Sources Storage Reservoirs General Water Treatment Plant Clearwell th Avenue Reservoir th Avenue Reservoirs Distribution System Pump Stations General High Service Pump Station th Avenue Reservoir Pump Station th Avenue Reservoir Pump Station Distribution System Existing Water Demand Historical Water Demands Description of Customers Served Summary WATER CONSERVATION ELEMENT General Progress Report Related to Previous WMCP Current and Proposed Water Conservation Program Source and Customer Metering Public Education and Outreach Technical and Financial Assistance Programs Water Reuse, Recycling and Non-potable Water Use Opportunities Annual Water Audit Leak Detection Program Leak Repair and Line Replacement Program Rate Structure Based on Quantity of Water Metered and Encourages Conservation Retrofit/Replacement of Inefficient Fixtures Estimated Water Savings Water Use Measurement and Reporting Summary WATER CURTAILMENT ELEMENT General Water Supply Deficiencies Page ii Water Management and Conservation Plan June 2010 Table of Contents Canby Utility

5 FINAL DRAFT Curtailment Strategy Conservation Alert Serious Alert Critical Alert WATER SUPPLY ELEMENT General Service Area Assumptions for the Planning Period Population Forecasts Water Demand Projections Comparison of Water Demands and Available Source Analysis of Alternative Sources Water Supply Criteria and Considerations Water Supply Alternatives Water Supply Alternatives Assessment Recommended Supply Alternative Water Right Implementation Schedule Mitigation Issues Summary APPENDICES A Previous WMCP Final Order B WMCP Extension Letter C Willamette River Application Letter D Local Government Comments <<TO FOLLOW>> E Water System Map F AWWA Water Audit Software G Previous Water Rate Structure H Adopted Water Rate Structure (June 1, 2010) I Water Rights Information J Canby Utility Board Resolution No. 124 (Water Shortage Plan) K Community Outreach and Education Samples L Leak Detection Report (2009) M Policy for Excessive Water Use LIST OF FIGURES No. Title Page Demand Summary Forecasted Maximum Daily Water Demand with Conservation Treatment Plant Production and Curtailment Alert Triggers Page iii Water Management and Conservation Plan June 2010 Table of Contents Canby Utility

6 FINAL DRAFT 5-1 Forecasted Maximum Daily Water Demand and Available Supply LIST OF TABLES No. Title Page ES-1 Summary of Benchmarks for Conservation Measures... ES Oregon Administrative Rule Requirements Molalla River Intake Water Facilities Summary Groundwater Intake Facilities Summary Water Rights Summary Water Rights and Use Summary Reservoir Summary Pump Station Summary Distribution System Pipe Summary Historic Water Use Summary Consumption by Customer Meter Size and Class Summary of Benchmarks for Conservation Measures Water Demand Projection Component Summary Water Demand and Population Projection Summary Water Right and Use Summary Source Alternative Screening Summary Concept-Level Source Alternative Costs (20-year planning horizon) Page iv Water Management and Conservation Plan June 2010 Table of Contents Canby Utility

7 EXECUTIVE SUMMARY

8 FINAL DRAFT EXECUTIVE SUMMARY Authorization In August 2009, the firm of Murray, Smith & Associates, Inc. (MSA) was authorized by Canby Utility to prepare this Water Management and Conservation Plan (WMCP). Purpose The purpose of this WMCP is to aid Canby Utility in documenting current water conservation programs in addition to potential future conservation measures. This WMCP is an update of Canby Utility s 2005 WMCP, and presents an evaluation of Canby Utility s long-term water supply needs and summarizes an implementation schedule for expanded water supply. Compliance This plan complies with water management and conservation planning requirements established under Oregon Administrative Rules (OAR) for Public Water Systems, Chapter 690, Division 86 and applicable elements of Division 315. A Water System Master Plan complying with OAR has also been prepared for Canby Utility, in coordination with this WMCP. The water system master plan was formally adopted by Canby Utility on April 13, Canby Utility is currently considering development of a new source to meet long-term water supply needs. An application for a new Willamette River source was submitted in 1990 and later put on administrative hold. The application process was resumed on March 20, Based on forecasted water demands, development of a new source may be required in approximately 10 years. Depending upon actual population growth and the effectiveness of current efforts to improve water use efficiency, development of a new source and water treatment facilities may be deferred beyond the 20-year planning horizon. As such, Canby Utility anticipates submitting an update of this WMCP 10 years from the date of plan completion and approval. The future WMCP update will include a detailed analysis of the proposed water supply development. Canby Utility provided this WMCP in draft form to Clackamas County for review and comments. A copy of the county comment letter is included in Appendix D. Background and Study Area Canby Utility s current water service area includes all areas within the current City of Canby (City) limits and Urban Growth Boundary (UGB). Canby Utility provides potable water to approximately 15,230 people through approximately 4,755 residential, commercial and industrial service connections. The study area of this planning effort is the entire area within the UGB. The Canby Utility service base is comprised largely of single and multi-family Page ES - 1 Water Management and Conservation Plan June 2010 Executive Summary Canby Utility

9 FINAL DRAFT residential customers that make up approximately 91 percent of the total number of customer meters and 80 percent of the total annual consumption. Commercial and industrial consumption accounts for approximately 12 and 2 percent of the total annual consumption, respectively. Irrigation, municipal and miscellaneous consumption combined accounts for approximately 6 percent of the total annual consumption. Existing System Description and Service Area Canby Utility water system includes surface and groundwater sources, treatment facilities, 66 miles of piping, four at-grade storage reservoirs and three pump stations. In April 2006, Veolia Water North America (VWNA) began operating the water treatment system under contract for Canby Utility. The current water service area is the area within the existing City limits. Canby Utility s water system planning area, which includes all land within the current UGB, encompasses a total area of approximately 3,465 acres. Supply Sources Canby Utility s primary source of water is the Molalla River with an intake pump station capacity of approximately 5,500 gpm. The pump station is supplied by both the Main River Intake and River Infiltration Gallery. Canby Utility s primary groundwater source is the Springs Gallery with a seasonally varied capacity up to approximately 1,000 gpm. Low ph and moderate nitrate concentrations limit the use of the Spring Gallery as a primary source. This source is used to blend with Molalla River water during high turbidity events in the river to reduce treatment plant influent turbidities. Two other, smaller capacity groundwater sources are not in use due to water quality concerns. Water Requirements Service Area and Population The existing population and total number of dwelling units were derived from current City of Canby planning data supported by projections from the United States 2000 Census and Portland State University Population Research Center (PRC) which provides current and historical population estimates for the State of Oregon. In 2009, Canby Utility supplied water to approximately 15,230 people in the water service area through approximately 935 industrial and commercial connections and 4,358 residential service connections. Historical Water Usage The term water demand refers to all of the water requirements of the system including domestic, commercial, municipal, institutional and industrial. Demands are discussed in terms of gallons per unit of time such as gallons per day (gpd) or gallons per minute (gpm). Demands are also related to per capita use as gallons per capita per day (gpcd). Canby Utility maintains daily water production records at its supply wells and treatment facilities which have been evaluated to estimate water demands. Historically, average daily demand Page ES - 2 Water Management and Conservation Plan June 2010 Executive Summary Canby Utility

10 FINAL DRAFT within the service area has been approximately 2.0 to 2.2 mgd and per capita consumption has ranged from approximately 130 to 150 gpcd. Recent maximum daily usage has been as high as approximately 6.8 mgd, with a maximum day demand (MDD) per capita consumption range of approximately 300 to 450 gpcd. Population Forecasts The historic annual growth rate for Canby Utility s service area was 2.8 percent from 1990 through This growth rate is consistent with forecasted Clackamas County population forecasts and the Downtown Canby Retail Market Analysis conducted in 2007 by Marketek, Inc. While it can be expected that short-term growth rates may be less than this projected rate of growth, for long-term planning purposes, it is anticipated that future growth rates will parallel these historical trends. This rate is also consistent with the 2.4 percent growth rate used in the 2010 City of Canby Transportation Service Plan. Population forecasts for the water service area were developed based on the 2.8 percent growth rate. The forecasted population at saturation development, or build out, for the water system planning area was taken from the City planning data which draws upon current residential densities for developed land and maximum zoned densities for undeveloped land to determine the number of potential dwelling units within the planned ultimate service area, the UGB. An ultimate population of approximately 42,420 is anticipated for Canby Utility s water system planning area. Water Demand Projections Estimates of future water demands were developed from Canby Utility s historical water usage trends from 2005 through 2009 and the population forecasts. For the purposes of this plan, future estimated average daily water usage is assumed to be approximately 138 gpcd. While this usage is stated as gallons per capita per day, this estimate accounts for more than just domestic water use. Total water demand is assigned a per capita value in order to project water demands with increasing population assuming the relative proportion of demand from non-residential users will remain unchanged. Per capita values presented in this plan incorporate water produced for all water users and purposes to include distribution system losses. Estimated water demands are developed by multiplying the estimated per capita water usage by the anticipated population for that year. Peak month demand and peak season demand (July 1 to September 30) forecasts are also developed based on per capita water demands of 273 gpcd and 230 gpcd, respectively. The forecasted MDD is anticipated to approach 10 mgd by 2030, with an ultimate build-out MDD of approximately 17 mgd. Progress Report Related to Previous WMCP Canby Utility submitted a WMCP that was approved in March The Final Order, included in Appendix A, approving the plan contained a condition that Canby Utility update Page ES - 3 Water Management and Conservation Plan June 2010 Executive Summary Canby Utility

11 FINAL DRAFT the plan by October 1, No benchmarks were included in the Final Order. This deadline was extended to July 1, This WMCP serves as the update to that plan and reports on the progress since the previous WMCP. Current and Proposed Water Conservation Program Canby Utility actively promotes water conservation through public education and outreach programs, system metering, leak detection programs, conservation-based rates/fees and other programs. Canby Utility s efforts to achieve water conservation and more efficient use of the region s water resources is developed around a new rate structure that encourages conservation. The water use reduction strategy presented in this report is based on a three-tiered rate structure as an incentive to reduce water use. With the newly adopted rate structure, Canby Utility is also expanding conservation education programs for its customers. Other programs will also be used to support conservation as available and practical on a case by case basis. Conservation benchmarks are presented in Table ES-1. Curtailment Strategy In July 1992, Canby Utility adopted Resolution No This resolution established a regulatory process for dealing with periods of water shortages. Resolution No. 124 establishes three stages of alert for potential shortage or water service difficulties: conservation alert, serious alert and critical alert. These three stages of alert are based on demand reaching set levels that can be expected to strain Canby Utility s ability to deliver adequate supply to meet all of the water needs of the community. Comparison of Water Demands and Available Source Canby Utility has certificated and permitted water rights on the Molalla River which exceed the anticipated future maximum daily demand in the 20-year planning horizon. The actual available water in the Molalla River varies seasonally such that available supply may be less than the existing maximum daily demand and potentially future average daily demand during the late summer. The Oregon Water Resources Department (OWRD) water availability analysis shows a net available water deficit near the mouth of the Molalla River. There are no records of Canby Utility being unable to adequately meet historical water demand needs. Because of the uncertainty in available water in the Molalla River, Canby Utility has applied for a water right on the Willamette River near Canby (S71072). While development of a new Willamette River source appears to be the most feasible approach, other source alternatives are still being considered. Canby Utility s recently completed Water System Master Plan recommended a preliminary engineering study to evaluate approaches to expanding the existing water treatment facility capacities to meet to peak day demands during the 20-year planning horizon. This recommended study will examine the costs and operational considerations of expanding Page ES - 4 Water Management and Conservation Plan June 2010 Executive Summary Canby Utility

12 FINAL DRAFT capacity at the existing treatment facilities site versus constructing facilities at a new site as well as evaluate all alternatives for using a combination of the Molalla River and Willamette River sources through a 20-year and 50-year planning horizon. This study will be completed in the next 10 years and the planned update of this WMCP will report on the selected longterm water supply facilities planning and a detailed implementation schedule for utilization of Canby Utility s existing Molalla River water rights ` and potential future water rights on the Willamette River. Summary In accordance with OAR requirements, this Water Management and Conservation Plan presents documentation of the Canby Utility s existing water system, demands, conservation and curtailment measures and an analysis of the Utility s future water supply needs. The analysis, findings and recommendations of this document were prepared in coordination with the Canby Utility s recent water system master planning work. Canby Utility anticipates submitting an update of this WMCP 10 years from the date of plan completion and approval. Table ES-1 presents a summarized list of the information required under OAR for the completion of this WMCP and the location of that information in this plan document. Table ES-1 Summary of Benchmarks for Conservation Measures Component Annual Water Audit Metering Meter testing and maintenance Rate structure Leak detection Public Education System-wide leak repair Technical and financial assistance Customer Service Benchmark If the level of unaccounted for water exceeds 10 percent, a more detailed record-keeping program and analysis would be appropriate and will be considered. The system is fully metered. The current meter testing and maintenance program will resume upon completion of the AMR program. Canby Utility will implement the adopted tiered-rate structure and collect and analyze water use data to assess the price elasticity and effectiveness for the conservation measures. Canby Utility will continue routine leak detection surveys. Finish development of an educational presentation for local school children with a focus on understanding drinking water and the role of conservation. Conduct educational visits one to two times per year. Include educational and informative fliers to be included in monthly billing statements. Fliers to be included two to four times per year. Canby Utility will continue to budget $300,000 toward replacement of aging water mains. Canby Utility will continue to promote the previously described technical and financial programs as feasible. Canby Utility provides access to educational and informational materials to assist customers in water use reduction in support of the new tiered water rate structure Page ES - 5 Water Management and Conservation Plan June 2010 Executive Summary Canby Utility

13 SECTION 1

14 FINAL DRAFT SECTION 1 INTRODUCTION Purpose The purpose of this Water Management and Conservation Plan (WMCP) is to aid Canby Utility in documenting current water conservation programs and to present potential future conservation measures. This WMCP also reviews and updates Canby Utility s Water Management Plan, evaluates Canby Utility s long-term water supply needs and develops an implementation schedule for expanded water supply. Compliance This plan complies with water management and conservation planning requirements established under Oregon Administrative Rules (OAR) for Public Water Systems, Chapter 690, Division 86 and applicable elements of Division 315. A Water System Master Plan complying with OAR has also been prepared for Canby Utility, in coordination with this WMCP. The water system master plan was formally adopted by Canby Utility on April 13, Canby Utility s previous Water Management and Conservation Plan was approved in March 2005, by the State of Oregon Water Resources Department (OWRD). A copy of the Approval Order is included in Appendix A of this report. Canby Utility was required to submit an update of the plan by October 1, 2009 as a condition of the Order approving the plan. A request for additional time to complete a new WMCP was submitted to OWRD on October 8, OWRD responded on October 19, 2009, identifying the new deadline for submittal of an updated plan as July 1, A copy of this correspondence is also included in Appendix B. Table 1-1 presents a summarized list of the information required under OAR for the completion of this WMCP and the location of that information in this plan document. Canby Utility is currently considering development of a new source to meet long-term water supply needs. An application for a new Willamette River source was submitted in 1990 and later put on administrative hold. The application process was resumed on March 20, A copy of the application letter is included in Appendix C. Based on forecasted water demands, development of a new source may be required in approximately 10 years. Depending upon actual population growth and the effectiveness of current efforts to improve water use efficiency, development of a new source and water treatment facilities may be deferred beyond the 20-year planning horizon. As such, Canby Utility anticipates submitting an update of this WMCP 10 years from the date of plan completion and approval. The WMCP update will include a detailed analysis of the proposed water supply development. Canby Utility provided this WMCP in draft form to Clackamas County and the City of Canby for review and comments. A copy of the county comment letter is included in Appendix D Page 1-1 Water Management and Conservation Plan June 2010 Introduction Canby Utility

15 Table 1-1 Oregon Administrative Rule Requirements FINAL DRAFT Item OAR Reference Report Section and Page Water Supplier Description Description of Supplier's Source(s) (1) 2-1 Delineation of Current Service Area (2) 2-1 Assessment of Adequacy and Reliability of Existing Supplies (3) 2-7 Quantifications of Present and Historic Use (4) 2-11 Summary of Water Rights Held (5) 2-3/2-4 Description of Customers Served and Water Use Summary (6) 2-13 Identification of Interconnections with Other Suppliers (7) N/A System Schematic (8) Appendix E Quantification of System Leakage (9) 3-3 Water Conservation Element Full Metering of Systems (4)(b) 3-1 Meter Testing and Maintenance Program (4)(c) 3-2 Annual Water Audit (4)(a) 3-3 Leak Detection Program (4)(e) 3-3 Leak Repair or Line Replacement Program (6)(a) 3-4 Rate Structure Based on Quantity of Water Metered (4)(d) 3-4 Rate Structure/Billing Practices that Encourage Conservation (6)(d) 3-4 Public Education Program (4)(f) 3-2 Technical and Financial Assistance Programs (6)(b) 3-2 Retrofit/Replacement of Inefficient Fixtures (6)(c) 3-4 Reuse, Recycling, Non-potable Opportunities (6)(e) 3-3 Other Measures, If Identified by Supplier (6)(f) N/A Progress Report on Previous WMCP (1) 3-1 Documentation of Water Use Measurement and Reporting (2) 3-6 Measures Already Implemented or Required Under Contract (3) N/A Water Curtailment Element Assessing Water Supply (1) 4-1 Stages of Alert (2) 4-1 Triggers for Each Stage of Alert (3) 4-2 Curtailment Actions (4) 4-2 Water Supply Element Delineation of Current and Future Service Areas (1) 5-1 Population Projections for Service Area (1) 5-1 Prepare Schedule to Fully Exercise Each Permit (2) 5-10 Prepare Demand Forecast (3) 5-1 Comparison of Projected Need and Available Sources (4) 5-2 Analysis of Alternative Sources (5)(8) 5-3 Quantification of Maximum Rate and Monthly Volume (6) 2-6 Mitigation Actions Under State and Federal Laws (7) 5-11 Other Items List of Affected Local Governments and Their Comments (5) 1-1/Appendix D Date for Submittal of Next Update (6) 1-1 Additional Time Requested to Meet Previous Benchmarks (7) N/A Page 1-2 Water Management and Conservation Plan June 2010 Introduction Canby Utility

16 FINAL DRAFT Scope of Work The scope of work for this plan includes the following work tasks: Data Gathering Work under this task includes gathering data for a facility inventory and for the completion of the WMCP. Much of this data is being gathered as part of Canby Utility s water master planning effort and work under this task will be limited to gathering information specific to compliance with water management and conservation plan requirements. Existing Condition Review and Facilities Inventory Under this task, a water supplier description will be prepared in conformance with Division 86 requirements including an updated tabulation of Canby Utility s existing water facilities. The tabulated inventories developed as part of the water system master plan are used as the basis for the completion of this task. Work under this task also includes documenting Canby Utility s past water conservation and curtailment practices, customer class descriptions, intergovernmental agreements for water supply to, and purchase from, other water providers, and water use summaries. Assess Water Needs and Water Rights The estimates of future population and water demands developed in the master plan will be tabulated in the form and format specific to the water management and conservation planning work. Canby Utility s existing water rights will be tabulated and assessed to confirm that adequate rights are available to meet Canby Utility s projected water needs. Water Supply Element Under this task, Canby Utility s long-term water supply options will be reviewed in light of Canby Utility s current position assessing and developing its long-term water supply options. In addition, this subtask will include a review and documentation to support Canby Utility s current water rights. The need for additional water rights will be evaluated based on the water needs and water rights assessment and recommendations for potential water right acquisitions. Modifications will be presented if justified. Water Conservation Element Work under this task includes documentation of Canby Utility s current water conservation program, review the program effectiveness through, and analysis of, historical per capita usage, and develop additional water conservation recommendations in accordance with OAR Division 86. This work will consider the following water conservation activities: Source and customer metering Water system audits Leak detection and repair On-going water main replacement Page 1-3 Water Management and Conservation Plan June 2010 Introduction Canby Utility

17 FINAL DRAFT Water rate and billing practices Public education Technical and financial assistance with retrofitting and replacements Reuse and recycling of water Water Curtailment Element This task includes documenting, reviewing and updating Canby Utility s current water curtailment plan and related ordinances and resolutions. Under this task a review of Canby Utility s existing curtailment plans for compliance with Division 86 requirements will be completed. Based on this review, recommendations will be developed for an updated water curtailment plan that includes stages, triggers, curtailment goals, and implementation measures. This effort will rely on the results of the storage volume analysis completed as part of the water system master planning work in the overall assessment of emergency storage needs. Evaluate Unaccounted-for Water Unaccounted-for water is water that leaves the system unmetered. This includes such uses as fire fighting, distribution system flushing, line breaks and leaks, unmetered usage, improperly registering meters and possible unauthorized or unrecorded connections to the system. As part of this task, water use and water sales records will be evaluated and the system s level of unaccounted-for water will be estimated. Recommendations will be presented if these levels are found to exceed Division 86 action levels Page 1-4 Water Management and Conservation Plan June 2010 Introduction Canby Utility

18 SECTION 2

19 FINAL DRAFT SECTION 2 WATER SUPPLIER DESCRIPTION General This section describes and inventories Canby Utility s water service area and water supply and distribution system facilities. Included in this section is a discussion of existing supply and transmission facilities, surface water intakes, pressure zones, storage and pumping facilities, distribution system piping, and treatment facilities. Background and Study Area Incorporated in 1893, the City of Canby (City) is located in the Willamette Valley just southeast of the confluence of the Molalla River and Willamette River in Clackamas County. The City has a current population of approximately 15,230 within the Urban Growth Boundary (UGB) area of 3,465 acres. The study area of this water management and conservation plan is entirely within the UGB. Water service is provided for residential, commercial and industrial uses. A 1970 City charter revision created the Canby Utility Board to provide electrical and water service to the City customers. In 1982, a charter amendment returned ownership of the water assets to the City and the Canby Utility Board continued to operate the water system. In 1993, an intergovernmental agreement between the City and the Canby Utility Board renewed the relationship. In 1999, the Canby Utility Board began doing business as Canby Utility. Plate 1 in Appendix E illustrates Canby Utility s water service area limits, which is also the City limits, and water system facilities. The Canby Utility service area does not adjoin any neighboring water systems. As such Canby Utility does not have any water system interties, exchange agreements, or intergovernmental cooperation agreements with neighboring water system providers. Supply Sources Surface Water Sources Canby Utility s primary source of water is the Molalla River. Surface water intakes on the Molalla River, as summarized in Table 2-1, include the River Infiltration Gallery (RIG), the Main River Intake (MRI) and Old River Intake. The Old River Intake was constructed in the early 1970s and consists of an intake structure that supplies Molalla River water to the treatment plant. The intake is currently not in use as water levels prevent withdrawal during summer months Page 2-1 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

20 FINAL DRAFT The RIG was constructed in 1980 and includes an in-water infiltration gallery, wet well, and raw water pumps. The gallery consists of perforated collector pipes located approximately eight to 10 feet below the river bed which connect to a common header. The wet well is 14 feet in diameter and 40 feet in depth. This gravel infiltration gallery requires periodic backwashing with raw water from the treatment plant. Table 2-1 Molalla River Intake Water Facilities Summary Source River Infiltration Gallery (RIG) Intake Capacity (gpm) 4,800 Main River Intake (MRI) 5,500 Pumps 2 x 100 hp (2,500 gpm each) 1 x 150 hp (4,500 gpm) Old River Intake 900 1,000 1 pump Notes The River Intake Pump Station serves both RIG & MRI. Capacity limited by low river levels. The MRI was constructed in 1997 and includes a screened intake structure that supplies water to the RIG wet well. The River Intake Pump Station, which houses two 100- horsepower (hp) and one 150-hp vertical turbine pumps extending into the wet well, serves both the RIG and MRI. Raw water can be supplied from a combination of the RIG and MRI. High turbidity levels in the Molalla River source water can result in temporary reduction of the intake s 5,500 gpm production capacity. During high turbidity events in the Molalla River, the RIG is the alternate supply source as it serves to minimize influent turbidity levels. Groundwater Sources Canby Utility holds water rights for three groundwater sources located along the banks of the Molalla River generally near the surface water intakes. Groundwater facilities, as summarized in Table 2-2, include the Springs Gallery, the Collection Boxes and Well No. 10. In addition, irrigation water for the Canby School District is supplied by a privatelyowned well referred to as Beck s Well. Around 1930, concrete collection boxes were installed at the base of the ridge near the location of the current Main River Intake. These structures collect water year round from springs and direct it into a cistern. The cistern discharges into the Springs Gallery. Due to water quality constraints, this source has not been used since the 1990s. In 1944, the City began construction of a concrete collection gallery near the Molalla River known as the Springs Gallery. The gallery is approximately 18 feet in diameter and 24 feet deep. By 1951, a new 30-inch diameter, 300-foot long wedge wire collection pipe was connected to the existing gallery. The current capacity of the Springs Gallery is approximately 1,000 gpm. The gallery is equipped with a 25-hp 1,000 gpm capacity pump Page 2-2 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

21 FINAL DRAFT Low ph and moderate nitrate concentrations limit the use of the Spring Gallery as a primary source. This source is used to blend with Molalla River water during high turbidity events in the river to reduce treatment plant influent turbidities. Source Springs Gallery Table 2-2 Groundwater Intake Facilities Summary Intake Capacity (gpm) 1,000 (varies seasonally) Notes Low ph and moderate nitrate levels. Used to supplement RIG & MRI. Collection Boxes -- Not in use due to high nitrate levels. Well No Beck s Well Not in use. High sulfur and hardness. Irrigation source for school district. Owned by private citizen. Well No. 10 located near the Springs Gallery has a single 250 gpm pump which discharges into the Springs Gallery. The groundwater from this well is high in sulfur and hardness. The well is not currently used. A private well currently owned by John W. Beck is used by agreement as a municipal irrigation supply for the Canby Public Schools. The 10-inch diameter well has a capacity of 400 to 600 gpm. The well is not currently used as a potable water source due to poor water quality. Water Rights Summary Table 2-3 summarizes the groundwater and surface water rights that Canby Utility holds, which includes five certificates, one permit and one registration for a total of approximately 10,923 gpm in water rights from both surface and groundwater sources. Table 2-3 also lists the point of diversion for all water rights. In addition, a water rights application is currently under review by the State of Oregon Water Resources Department for approximately 5,565 gpm from the Willamette River. Water Treatment Facilities General Canby Utility s water treatment facilities were constructed in Subsequent incremental expansion of the water treatment plant in 1980, 1995 and 2006 have improved the facilities to the current nominal capacity of 8 million gallons per day (mgd) Page 2-3 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

22 The Canby Utility water treatment facilities consist of the following components: Water intake facilities and pumps, as described in Supply Sources above Pre-treatment injection facilities A sedimentation basin Four direct filter units with a 1 mgd capacity each Four modular upflow clarifier/filter units with a 1 mgd capacity each UV disinfection facilities A 2.4 million gallon steel storage reservoir High service pump station Post-treatment disinfection and ph adjustment chemical injection facilities Three backwash ponds FINAL DRAFT The eight treatment units, treatment aid chemicals (coagulants and polymers) and disinfectant facilities are housed in a series of metal buildings. The raw water from the River Intake Pump Station is split into two process trains. Train No. 1 includes coagulant dosing, limited hydraulic flocculation and sedimentation, and filtration through filter units 1 through 4. Train No. 2 includes coagulant dosing and treatment in modular treatment units using US Filter upflow clarification and media filtration through filter units 5 through 8. The filtered water from both trains is combined prior to disinfection with sodium hypochlorite and ultraviolet (UV) light, and ph adjustment with sodium hydroxide. Water then flows through a baffled, partially buried welded steel clearwell. A booster pump station pumps water from the clearwell to the distribution system and other storage reservoirs. The clearwell and booster pump station are further described later in this section. Treatment Plant Filter Backwash Backwash water is pumped from the clearwell to the filters. The filters are also configured to allow for filter-to-waste capability for filter startup procedures. Raw water is used as upflow rinse. Sedimentation basin blowdown is drained manually to the backwash ponds. Three new ponds for backwash discharge water were installed in 2007 near the Springs Gallery. These gravel bottom ponds drain primarily through infiltration. Process Instrumentation and Controls Flow is metered at the River Intake Pump Station discharge main, the Springs Gallery water discharge main, the treated water effluent from filter units 1 through 4, the raw water influent for each clarifier (treatment units 5 through 9), the backwash pump, and downstream of the finished water production pumps. Coagulant doses are controlled by a streaming current meter. Turbidity meters monitor raw water, individual filter effluent, the combined filter effluent, and treated water entering the distribution system. Treated water entering the distribution system is also monitored for residual chlorine concentration and ph levels Page 2-4 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

23 FINAL DRAFT Source Application Permit RIG & MRI (Molalla River) Old River Intake (Molalla River) Springs Gallery (Groundwater) Collector Boxes (Groundwater) Well No. 10 (Groundwater) Willamette River Table 2-3 Water Rights Summary Certificate or Registration Priority Date Production Capacity, cfs (gpm) Status Point of Diversion S60921 S /20/ (4,488) NC 4 NW 1/4 SE 1/4, Sec 32, 3S, 1E, WM S47326 S /31/ (2,244) NW 1/4 NE 1/4, NC 12/22/ (2,244) Sec 5, 4S, 1E, WM G5018 G /16/ (672) NC SW 1/4 SE 1/4, GR /31/ (800) NC Sec 32, 3S, 1E, WM S15085 S /10/ (90) NC SW 1/4 SE 1/4, S15264 S /16/ (112) NC Sec 32, 3S, 1E, WM G7542 G /11/ (273) NC SW 1/4 SE 1/4, Sec 32, 3S, 1E, WM Total (10,923) Pending Application S N/A (5,565) -- Notes: 1) Transferred (T7629, 11/19/1996 and 5/1/1997) 2) Registration Number GR294 3) Application submitted 12/27/1990. Processing resumed 3/20/2009 4) NC = Not cancelled 5) Authorized completion date for S46199 is October 1, 2040 SW 1/4 SW 1/4, Sec 27, 3S, 1E, WM Page 2-5 Water Management and Conservation Plan May 2010 Water Supplier Description Canby Utility

24 FINAL DRAFT Table 2-4 Water Rights and Use Summary Source RIG & MRI (Molalla River) Old River Intake (Molalla River) Springs Gallery (Groundwater) Collector Boxes (Groundwater) Well No. 10 (Groundwater) Permit Certificate or Registration Water Right Instantaneous Capacity, cfs (gpm) Annual Capacity, (ac-ft) Water Use Instantaneous Peak Historical, cfs (gpm) 2009 Annual Volume, (ac-ft) S (4,488) n/a 6.05 (4200) S G S11011 S GR (2,244) 5.0 (2,244) 1.5 (672) 1.78 (800) 0.20 (90) 0.25 (112) n/a 10.0 (4,488) 0.0 n/a n/a n/a n/a 3.28 (1472) (202) 0.0 G (273) n/a 0.61 (273) 0.0 Total (10,923) Page 2-6 Water Management and Conservation Plan May 2010 Water Supplier Description Canby Utility

25 FINAL DRAFT Standby Power A standby diesel generator rated for 350 kw is located at the MRI facilities. A standby diesel generator rated for 500 kw is located at the treatment plant. The treatment plant generator allows the plant to operate at an approximate capacity of 4,400 gpm (6.3 mgd). Source Assessment As previously presented, Canby Utility s primary source is the Molalla River. The water system does not have any emergency interconnections with nearby water systems. The Molalla River source is supplemented by groundwater sources. Molalla River The Molalla River source has seasonal capacity limitations and intermittent water quality limiting events. The Molalla River experiences high turbidity events, primarily during the winter, which limit the treatment plant production rate. During these events, the raw river water source is blended with the groundwater sources. The reduced treatment plant capacity during these high turbidity events is well above existing the average daily demand, but less than the maximum day demand. During the late summer and early fall, the flow rate in the Molalla River can be much lower than Canby Utility s existing maximum day demand. While there are no records of Canby Utility being unable to meet water demand needs, the Oregon Water Resources Department water availability analysis shows a net available water deficit near the mouth of the Molalla River. Based on current information the Molalla River has inadequate capacity to support long-term source capacity expansion to serve Canby Utility s future water demand needs. Groundwater Sources Due to poor water quality, the collector boxes and Well No. 10 are not currently in use. The Springs Gallery is used to supplement the Molalla River water during high turbidity events. Poor water quality prevents the use of the Springs Gallery as a primary source. Storage Reservoirs General Storage in the Canby Utility water system is provided by four ground level finished drinking water storage reservoirs with a total usable capacity of 5.5 million gallons (mg). All four of these reservoirs have overflow elevations below the static hydraulic grade of the Canby Utility distribution system and serve as suction supply for booster pump stations which supply water to the distribution system at required service pressures. Table 2-5 presents a summary of Canby Utility s storage facilities. A brief description of each reservoir follows Page 2-7 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

26 FINAL DRAFT Table 2-5 Reservoir Summary Reservoir Name 4th Avenue Reservoir Clearwell 13th Avenue Reservoir A 13th Avenue Reservoir B General Location NW 4th Avenue and N. Fir Street Treatment Plant Southwest 13th Avenue Southwest 13th Avenue Nominal Capacity (mg) Usable Capacity (mg) Overflow Elevation (feet) Year Built Water Treatment Plant Clearwell A 2.4 mg welded steel reservoir was constructed with the treatment plant in 1972 for use as a clearwell for chlorine contact time and backwash storage. With the addition of UV disinfection as the primary disinfectant for treatment, the clearwell volume is no longer required to achieve disinfectant contact time (CT). The reservoir has a 50-foot water depth with a floor elevation located 10 feet below grade. Due to pump suction head requirements at the High Service Pump Station, it is understood that the bottom 10 feet of the clearwell is unusable storage. 4th Avenue Reservoir Constructed in 1964, the oldest of Canby Utility s reservoirs is the 500,000 gallon steel reservoir previously known as the Street Tank at the NW 4th Avenue and North Fir Street site. As with the clearwell, the lowest level in the reservoir is considered dead storage as it is below the level of the on-site pump station. The usable volume of this reservoir is limited to 400,000 gallons. The 4th Avenue Reservoir is currently used to supplement the 13th Avenue and Clearwell facilities during peak demand periods. The reservoir fills through a programmable logic controller (PLC) controlled valve connection to the distribution system and provides suction supply for an on-site pump station. The on-site booster pump station is operated to initiate reservoir turnover based on observed chlorine residual levels in the reservoir. The procedures includes pumping to lower the water level in the reservoir to approximately one-third capacity, a waiting period to ensure that the lower residual water has been consumed as system demand and a refilling process typically taking less than one day Page 2-8 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

27 FINAL DRAFT 13th Avenue Reservoirs In 1983, a 2.0 mg circular prestressed concrete reservoir concrete reservoir was constructed on Southwest 13th Avenue. The reservoir has a 22.5-foot water depth. The reservoir fills through an PLC controlled valve connection to the distribution system and provides suction supply for an on-site pump station. As with the other reservoirs in the system, due to limitations in suction lift, water below the 5-foot depth cannot be pumped from the reservoir and the resulting usable storage volume is limited to 1.6 mg. A new 2.0 mg fusion glass-lined bolted steel reservoir was constructed in 2009 immediately south of the existing reservoir and is similarly configured with a usable storage volume of 1.6 mg. Both reservoirs are operated with a reservoir drawdown and refill cycle similar to that of the 4th Avenue Reservoir during periods of low demand. The filling cycle typically takes a few days. A new motor controlled butterfly valve fills both reservoirs at this site. Distribution System Pump Stations General In addition to the raw water intake pumps, Canby Utility operates three distribution system pump stations. A brief description of each station is presented below and Table 2-6 presents a summary of existing pumping facilities. Table 2-6 Pump Station Summary Pump Station 13th Avenue High Service Pump Station (Treatment Plant) Original Year Built th Avenue 1964 Unit Pumps Motor Horsepower (hp) Nominal Capacity (gpm) 1 Constant Speed 50 1,000 2 Constant Speed 50 1,000 3 Variable Speed 75 1,600 4 Constant Speed 75 1,600 1 Variable Speed 100 2,200 2 Variable Speed 100 2,200 3 Variable Speed 200 3,000 4 Constant Speed Variable Speed Constant Speed Page 2-9 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

28 FINAL DRAFT High Service Pump Station The High Service Pump Station located at the water treatment plant houses four pumps that pump from the clearwell into the distribution system. The largest pump is a 200 hp split-case vertical pump with a nominal capacity of approximately 3,500 gpm at 70 psi. This pump can be operated simultaneously with the other three pump units only under certain conditions as they are not hydraulically compatible. The pump station also houses two 100-hp horizontal split case pumps with nominal capacities of approximately 3,000 gpm each. All three of these pumps are controlled by a variable frequency drive (VFD). The smallest pump is a 25- hp split case pump with a nominal capacity of approximately 270 gpm. The firm capacity of the pump station is approximately 6,000 gpm. The High Service Pump Station serves as the primary source of supply during normal operation and operates continuously to maintain pressure in the distribution system. 4th Avenue Reservoir Pump Station The pump station at the 4th Avenue Reservoir houses two 40-hp pumps with an approximately nominal capacity of 750 gpm each. One of the two pump units is controlled by a hydraulic drive system for variable speed operation. 13th Avenue Reservoir Pump Station The pump station located at the 13th Avenue Reservoir site houses four variable speed pumps. The two fixed speed 50-hp pumps have a nominal capacity of 1,000 gpm each and the two 75-hp pumps, one fixed speed and one with a variable frequency drive, have a nominal capacity of approximately 1,600 gpm each. The pump station is configured primarily for fire protection purposes with a nominal firm capacity of approximately 3,600 gpm. One open pump can for an additional pump is available. Distribution System Canby Utility s water service area is comprised of a single pressure zone. Existing ground elevations served range from approximately 100 to 180 feet above mean sea level. The overflow elevation of the water treatment plant clearwell is approximately 198 feet. The system is served primarily by the High Service Pump Station at the water treatment plant and the pump station at the 13th Avenue Reservoirs. While pressure ranges are based on pump characteristics and topography, the average system pressure is approximately 70 psi. The zone includes residential, commercial and industrial land uses. The distribution system consists of approximately 66 miles of pipe ranging in diameter from 4- to 16-inches, with most of the pipes being 6- and 8-inch diameter. In addition, there is approximately 1,500 feet of pipe less than 4 inches in diameter. Pipe material is largely ductile iron, steel, and PVC with copper and asbestos concrete pipe being less common. Table 2-7 summarizes pipe length and age by nominal size Page 2-10 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

29 FINAL DRAFT Pipe Diameter (inches) Table 2-7 Distribution System Pipe Summary Estimated Pipe Length (feet) Total (miles) 4 8,781-1, ,839 39,061 34,841 21,940 12, ,125 3,885 9,678 25,616 41, ,142 9,339 8,125 6,646 3, ,452 20,896 5,077 20, ,491 5,476 5,380 5, , Total Length 52,145 66,344 80,687 64,659 84, Note: Table reproduced from 2003 Water Master Plan Update Existing Water Demand Water demand estimates were developed from a review of Canby Utility s historical water production and consumption records. Historical water demands are presented in this section. Forecasted water demands are presented in Section 5. Historical Water Demands Table 2-8 summarizes, and Figure 2-1 illustrates, historical system-wide water demand trends from 2005 through Due to a finished water meter failure, production estimates from January 1, 2007, through June 30, 2008, appeared to be unreliable. The raw water meter data has been used to estimate demand for this time period with a five percent adjustment to reflect in-plant water use. The unreliable meter was replaced in June Page 2-11 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

30 FINAL DRAFT Figure to 2009 Demand Summary 7 6 Water Demand by Month Average Day Demand Peak Day Demand Water Demand by Year Annual Average Inside Demand 5 Demand (mgd) Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Year and Month Notes: 1) Peak Day Demand by Month is the largest demand day in each month. 2) Inside Demand is the average daily demand from November 1 through April 30. Table 2-8 Historic Water Use Summary Year Water Service Area Average Day Demand (ADD) Maximum Day Demand (MDD) Population mgd gpcd mgd gpcd , , , , , Notes: Million gallons per day (mgd); gallons per capita per day (gpcd) Page 2-12 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

31 FINAL DRAFT Description of Customers Served The Canby Utility customer base is comprised largely of single and multi-family residential customers. These customer classes make up approximately 91 percent of the total number of customer meters and represent approximately 80 percent of the total annual consumption. Commercial and industrial consumption accounts for approximately 12 and 2 percent of the total annual consumption, respectively. Table 2-9 presents a summary of the consumption in 2009 by water meter size and customer class. Summary This section presents a summary of Canby Utility s existing water system, including the transmission and supply system, storage and pumping facilities, water treatment facilities and distribution system piping. Section 3 presents a summary of existing land uses within the water service area and develops estimates of the future population and water demand requirements Page 2-13 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

32 FINAL DRAFT Meter Type Table Consumption by Customer Meter Size and Class 2009 Annual Consumption (cubic feet) Number of Meters Percent of Total Consumption Percent of Total Number of Meters Residential 55,098,767 3, % 82.5% 5/8 x ¾ Single family 54,416,595 3, % 81.7% 1 Single family 682, % 0.8% Multi-Family 18,276, % 9.1% 5/8 x ¾ Multi family 2,828, % 6.5% 1 Multi family 1,488, % 1.4% 1 ½ Multi family 2,182, % 0.6% 2 Multi family 3,457, % 0.4% 3 Multi family 4,047, % 0.1% 4 Multi family 4,272, % 0.1% Commercial 11,629, % 6.9% 5/8 x ¾ Commercial 1,916, % 4.1% 1 Commercial 2,049, % 1.2% 1 ½ Commercial 2,918, % 0.9% 2 Commercial 2,371, % 0.4% 3 Commercial 661, % 0.1% 4 Commercial 1,712, % 0.1% Industrial 1,730, % 0.1% 1 Industrial 144, % 0.1% 1 ½ Industrial 80, % 0.0% 2 Industrial 139, % 0.0% 4 Industrial 1,366, % 0.0% Municipal 1,564, % 0.2% 5/8 x ¾ Municipal 25, % 0.1% 1 Municipal 35, % 0.1% 1 ½ Municipal 228, % 0.0% 2 Municipal 1,274, % 0.1% Irrigation 3,020, % 0.8% 5/8 x ¾ Irrigation 406, % 0.3% 1 Irrigation 927, % 0.2% 1 ½ Irrigation 509, % 0.1% 2 Irrigation 356, % 0.0% 3 Irrigation 820, % 0.1% Miscellaneous 659, % 0.3% 5/8 x ¾ Internal 18, % 0.0% 2 Internal 22, % 0.0% Tanker Fill Base 2, % 0.0% Non-billed water 616, % 0.3% Total 91,979,795 4, % 100.0% Page 2-14 Water Management and Conservation Plan June 2010 Water Supplier Description Canby Utility

33 SECTION 3

34 FINAL DRAFT SECTION 3 WATER CONSERVATION ELEMENT General This section describes Canby Utility s current and proposed water conservation efforts, includes a progress report related to the previous Water Management and Conservation Plan, and presents benchmarks for the next progress report. Progress Report Related to Previous WMCP Canby Utility submitted a Water Management and Conservation Plan (WMCP) that was approved in March The Final Order, included in Appendix A, approving the plan contained a condition that Canby Utility update the plan by October 1, No benchmarks were included in the Final Order. As discussed in Section 1, this deadline was extended to July 1, A copy of this correspondence in included in Appendix B. This WMCP serves as the update to that plan and reports on the progress since the previous WMCP. Current and Proposed Water Conservation Program Canby Utility actively promotes water conservation through public education and outreach programs, system metering, leak detection programs, conservation-based rates/fees and other programs. As required by the Division 86 Rules, this section presents an evaluation of water conservation measures that must be considered in a WMCP. For each measure, Canby Utility s current programs are described and, where feasible, opportunities for implementation of measures not currently used by Canby Utility or for program expansion are identified and discussed. Canby Utility s efforts to achieve water conservation and more efficient use of the region s water resources is developed around a new rate structure that encourages conservation. The water use reduction strategy described in this report is based on a three-tiered rate structure as an incentive to reduce water use. With the newly adopted rate structure, Canby Utility is also expanding conservation education programs for its customers. Other programs will also be used to support conservation as available and practical on a case by case basis. Source and Customer Metering Full Metering of System Canby Utility has a fully metered system, including all customer service connections within its service area. Canby Utility has begun an automatic meter reading (AMR) program Page 3-1 Water Management and Conservation Plan June 2010 Water Conservation Element Canby Utility

35 FINAL DRAFT Meter Testing and Maintenance Program Under Canby Utility s historical meter testing and replacement program, crews tested and repaired (or replace as necessary) large meters, defined as three inches in diameter and larger, typically every four to five years. The last large meter tests were completed in May Large meter testing will resume after all existing meters have been replaced and upgraded with AMR meters. Each month, Canby Utility also routinely replaces a number of smaller meters, typically less than three inches in diameter, in response to customer inquiries or deficiencies noted by staff. Small meters are rarely tested as it is more economical to replace them. Public Education and Outreach Canby Utility is beginning periodic inclusion of informational fliers with monthly billings. Fliers will offer water saving tips, provide general facts on usage and request voluntary actions to curtail water use. Customers are also referred to the Regional Water Provider s Consortium website which contains useful information and tips for water conservation ( Sample fliers are included in Appendix K. Utility representatives will give presentations on water conservation in local schools. Presentations include book covers and maps for the audience, contests and tours of the water treatment plant, all of which emphasize the importance of conservation and wise use of Canby Utility s water supplies. Sample materials are included in Appendix K. Technical and Financial Assistance Programs Canby Utility evaluated the effectiveness of the financial assistance programs for their water utility customers and found that rebate programs were less effective at reducing water usage than pricing structure and education programs. Canby Utility has developed a number of targeted programs which are described below. Canby Utility offers financial assistance to customers who experience leaks or breaks on the customer s side of the meter. A credit of up to one-half of the above normal usage for up to two months can be applied. A copy of the resolution adopting this policy is included in Appendix M. Customer service staff routinely advise customers on how their water usage can be reduced. In addition to informational materials available at the office, staff routinely recommend various educational and information websites and other local resources that customers can consult. Also, toilet leak detection kits are available upon request at the Canby Utility office Page 3-2 Water Management and Conservation Plan June 2010 Water Conservation Element Canby Utility

36 FINAL DRAFT Water Reuse, Recycling and Non-potable Water Use Opportunities Currently the groundwater wells owned by Canby Utility cannot be cost effectively treated for use as a potable water use source. The privately owned Beck's Well, however, is currently being developed and used as a source of irrigation water. This well is used by agreement as a municipal irrigation supply for the Canby Public Schools and is currently used for irrigation of fields at Ackerman Middle School during the peak summer season. Using well water for irrigation purposes can reduce the demand for raw water from the Molalla River during the warm summer months, when demand for water is the greatest, thereby preserving flow in the Molalla River when stream flows are typically low. Annual Water Audit In compliance with annual water-use reporting requirements defined in Oregon Administrative Rules (OAR) Chapter 690 Division 85, Canby Utility has submitted annual water use data for each of its water rights. Canby Utility performs an annual water audit to account for the total volume of water supplied to the system, consumed by customers through metered service connections, and use for distribution system flushing and construction purposes. This audit includes an estimate of the volume of water lost to distribution system flushing, as recorded by Canby Utility staff performing this task. A few other authorized, unmetered water uses exist, such as firefighting. To better track water usage, Canby Utility requires construction related water use to be metered and the operations yard has a metered filling station. As indicated in Section 2, the results of this audit indicate that Canby Utility experienced an annual water loss for fiscal year 2009 of 8.4 percent. This level of loss indicates that a more thorough annual water audit and leak detection program, to identify other authorized unmetered or unauthorized uses, would not currently benefit Canby Utility. Canby Utility will continue measuring and recording water usage data to identify trends or abrupt changes. If the level of unaccounted for water exceeds 10 percent, a more detailed record-keeping program and analysis would be appropriate and will be considered. The industry standard for such record-keeping is the American Water Works Association (AWWA) Water Audit Software. A copy of the instructions, input and output forms for this free software are included in Appendix F. Canby Utility will consider use of this software or an alternative to this software that will allow for a detailed analysis of water loss if future levels of unaccounted for water rise to the level warranting further action. Leak Detection Program Water loss prevention and leak detection programs are typically economical when annual water losses regularly exceed 10 percent. Even though the current estimated percentage of unaccounted-for water is below this level, Canby Utility currently has a comprehensive ongoing leak detection program within the distribution system. As described above, Canby Utility continues to educate customers regarding detection and elimination of water leaks downstream of the meter, including the current practice of identifying higher than normal Page 3-3 Water Management and Conservation Plan June 2010 Water Conservation Element Canby Utility

37 FINAL DRAFT meter readings and notifying customers of possible leaks. The AMR program with monthly billing facilitates timely identification of above normal water usage. Every two years Canby Utility undertakes the completion of a leak detection survey of water mains and schedules repair or replacement of the defective mains identified. Canby Utility has contracted with an outside firm to have this service performed. Canby Utility budgets approximately $6,000 for leak detection every 2 years. A copy of the most recent leak detection survey is in included as Appendix L. In 2010, Canby Utility purchased leak detection equipment for use by staff to identify and address leaks. Leak Repair and Line Replacement Program Canby Utility conducts occasional surveys to identify potential leaks in the system. If a leak is detected in the distribution system, a decision is made to repair the leak immediately, schedule a repair for the leak or to record and monitor the leak in future leak detection surveys. In addition, Canby Utility budgets approximately $300,000 annually for water line replacement. Rate Structure Based on Quantity of Water Metered and Encourages Conservation Canby Utility s previous water rate structure included a monthly base rate plus a fixed rate usage charge. Canby Utility recently adopted a rate structure that consists of a monthly base rate plus a three-tiered inclining block volume charge. The base rate increases with the size of the water meter and the tiered volume determination and charges are based on customer class. This water rate structure is based upon a comprehensive cost-of-service analysis to equitably assign costs to customers based on their demands, and a rate design analysis to promote water conservation and efficient water usage. The monthly billing frequency helps customers better relate water costs with water usage. The rate structure became effective June 1, The previous rate structure and adopted current water rate structure with adoption resolution are included in Appendix G and H, respectively. Retrofit/Replacement of Inefficient Fixtures Canby Utility undertook a showerhead replacement program during the early 1990 s. This program was offered as part of an effort to reduce both water usage and electrical heating costs as part of a Bonneville Power Administration program. Canby Utility evaluated the effectiveness of the financial assistance programs and found that rebate programs appeared to be less effective at reducing water usage than pricing structure and education programs. Estimated Water Savings As part of the rate study performed in 2010, the adopted rate structure is estimated to reduce the peak demand by approximately 0.25 million gallons per day (175 gallons per minute). This is approximately 3 percent of the nominal treatment plant capacity. Most of the Page 3-4 Water Management and Conservation Plan June 2010 Water Conservation Element Canby Utility

38 FINAL DRAFT estimated annual water reduction will occur during peak season, resulting in an annual volume of approximately 128 acre-feet (42 million gallons). These estimates assumed a standard industry price elasticity of water appropriate for the service area based on information for similar service areas in the region. Canby Utility plans to document the success of the water conservation program in reducing water demands over the next five years as part of the proposed WMCP progress report. Figure 3-1 presents the forecasted average and maximum daily water demands with and without the effects of the tiered rate structure as previously discussed. Figure 3-1 Forecasted Maximum Daily Water Demand with Conservation Daily Demand (million gallons per day) MDD MDD with conservation ADD ADD with conservation Existing Capacity Page 3-5 Water Management and Conservation Plan June 2010 Water Conservation Element Canby Utility

39 FINAL DRAFT Table 3-1 Summary of Benchmarks for Conservation Measures Component Annual Water Audit Metering Meter testing and maintenance Rate structure Leak detection Public Education System-wide leak repair Technical and financial assistance Customer Service Benchmark If the level of unaccounted for water exceeds 10 percent, a more detailed record-keeping program and analysis would be appropriate and will be considered. The system is fully metered. The current meter testing and maintenance program will resume upon completion of the AMR program. Canby Utility will implement the adopted tiered-rate structure and collect and analyze water use data to assess the price elasticity and effectiveness for the conservation measures. Canby Utility will continue routine leak detection surveys. Finish development of an educational presentation for local school children with a focus on understanding drinking water and the role of conservation. Conduct educational visits one to two times per year. Include educational and informative fliers in monthly billing statements. Fliers to be included two to four times per year. Canby Utility will continue to budget $300,000 toward replacement of aging water mains. Canby Utility will continue to promote the previously described technical and financial programs as feasible. Canby Utility provides access to educational and informational materials to assist customers in water use reduction in support of the new tiered water rate structure. Water Use Measurement and Reporting Canby Utility complies fully with the annual reporting requirements of OAR Chapter 690, Division 85. Canby Utility completes and submits the annual report for the current year to the Oregon Water Resources Department for each water right. The water use measurement is completed using the Flow Meter Method for all water sources. Summary This section documents Canby Utility s current water conservation programs and demonstrates Canby Utility s ongoing commitment to evaluate and implement water conservation measures that will continue to improve the efficient use of the community s water resources Page 3-6 Water Management and Conservation Plan June 2010 Water Conservation Element Canby Utility

40 SECTION 4

41 FINAL DRAFT SECTION 4 WATER CURTAILMENT ELEMENT General This section documents Canby Utility s current water curtailment planning. This curtailment element is excerpted with minor updates from the previous Water Management and Conservation Plan completed in Water Supply Deficiencies The water treatment system is provided with redundant pumps so that failure of anyone pump will not stop water production and delivery. Diesel-generators are provided to supply electricity to the pump station serving the River Infiltration Gallery and Main River Intake as well as the Springs Gallery pump, filter effluent pumps and the production pumps so that water production of can be continued. However, the 13th Avenue Reservoirs and the 4th Avenue Reservoir will be out of operation upon the loss of electricity. In the event of multiple equipment failure, such as a fire at the pump station, contamination of water supplies, or other events, Canby Utility could be prevented from delivering water. Canby Utility has adopted a curtailment plan, described below, that will be implemented to extend available water supplies, if any, until normal production and delivery can be resumed. If no water is available from Canby Utility's system, then Canby Utility will make arrangements to bring in water by tank truck. Oregon Emergency Management Division will be called to provide tank trucks. The Army Corps of Engineers can help after state resources are committed. From trucks water would be dispensed to the customers in small containers or, if supply was sufficient, added to the Clearwell, 13th Avenue Reservoirs or the 4th Avenue Reservoir, and pumped using either normal or emergency generators. In the past 18 years, Canby Utility has not encountered a supply deficiency that has mandated curtailment efforts, or has impacted Canby Utility s ability to deliver water supplies. The only time Canby Utility has implemented their curtailment plan, as defined below, was in 1992 when voluntary conservation efforts (i.e., a Conservation Alert was issued) were implemented. Canby Utility has encouraged extraordinary conservation efforts at times to support curtailment efforts of surrounding communities, most notably the City of Portland, in times of regional shortages. Curtailment Strategy In July 1992, Canby Utility adopted Resolution No This resolution established a regulatory process for dealing with periods of water shortages. Resolution No. 124 establishes three stages of alert for potential shortage or water service difficulties. These stages are: Page 4-1 Water Management and Conservation Plan June 2010 Water Curtailment Element Canby Utility

42 FINAL DRAFT Conservation Alert Serious Alert Critical Alert A copy of Resolution No. 124 is included as Appendix J. Each of the alert stages is described below. As an example, Figure 4-1 shows how each alert stage related to treatment plant production since the 2006 plant capacity expansion. As shown in the figure, no curtailment action was necessary for this year as the 85% maximum day demand was only approached for a single day. Figure Treatment Plant Production and Curtailment Alert Triggers 8 7 Production (mgd) Conservation Alert Trigger Serious Alert Trigger Critical Alert Trigger Jan-06 Jan-07 Jan-08 Jan-09 Jan-10 Conservation Alert A Conservation Alert is issued when Canby Utility s general manager determines that water consumption exceeds availability and/or water shortage within the system is approaching the minimum required to meet fire protection and other essential requirements. This trigger is typically defined as when water use reaches 85% of the treatment plant capacity for three consecutive days, and/or when a state drought declaration is issued affecting the service area. When a Conservation Alert is issued the General Manager shall have the authority to request voluntary reduction of water use by customers, which may include, but are not limited to, the following specific actions: Page 4-2 Water Management and Conservation Plan June 2010 Water Curtailment Element Canby Utility

43 FINAL DRAFT Raise customer awareness through notification of water conditions and provide general information on water. Limiting irrigating lawns between 7 am and 11 pm. Prohibiting hosing and/or washing of sidewalks, walkways, driveways, streets, parking lots, open ground, or other hard surfaced areas except where necessary for public health or safety. Prohibiting washing cars, boats trailers, or other vehicles by hose without using a shut off nozzle. Washing such vehicles at commercial or fleet washing facilities which uses water recycling equipment is an exception. Prohibiting serving water for drinking at restaurant, motel, cafe, cafeteria, or other public places where food is sold or served to any person unless expressly requested. Prohibiting cleaning buildings (walls or roofs) except in preparation for painting. Requesting voluntary compliance with alternate day system for landscape watering (i.e., even numbered addresses water on even numbered days, and odd numbered addresses on odd numbered days). Requesting other voluntary measures on the part of Canby Utility customers. Serious Alert A Serious Alert is issued when deemed necessary as determined by Canby Utility s general manager. Typically this is defined as when water use reaches 90% of the treatment plant capacity for two consecutive days. The inability to provide water to meet demand and/or low stream flows in the Molalla River caused by drought or other emergency conditions may also necessitate the triggering of this alert level. When a Serious Alert condition is determined by Canby Utility, Canby Utility may declare an emergency restricting certain uses. Restrictions include: Prohibiting lawn watering between the hours of 11 pm and 7 am. Requiring compliance with alternate day system for landscape watering (i. e., even numbered addresses water on even numbered days, and odd numbered addresses on odd numbered days). System-wide water pressure will be reduced below standard operating pressure in accordance with the existing conditions, but not to the point so as to jeopardize public health or safety. Restricting or prohibiting other outdoor uses as determined by Canby Utility Page 4-3 Water Management and Conservation Plan June 2010 Water Curtailment Element Canby Utility

44 FINAL DRAFT Critical Alert A Critical Alert is issued when deemed necessary as determined by Canby Utility s general manager. Typically this is defined as when water use reaches 95% of treatment plant capacity for one day. The inability to provide water to meet demand and/or low stream flows in the Molalla River caused by drought or other emergency conditions may also necessitate the triggering of this alert level. When a Critical Alert condition is declared, Canby Utility may declare an emergency prohibiting certain uses: Upon such action, it shall be expressly prohibited to: Water, sprinkle, or irrigate lawns, grass, or turf unless: o It is new lawn, grass, or turf that has been seeded or sodded after March 1 of the calendar year in which any restrictions are imposed, and in such cases it may be watered as necessary until established; o Lawn, grass or turf that is part of a commercial sod farm; o High use athletic fields that are used for organized play; o Golf tees and greens; and o Park and recreation areas deemed by Canby Utility to be of a particular significance and value to the community that would allow exception to the prohibition. Washing, wetting down, or sweeping with water, sidewalks, walkways, driveways, parking lots, open ground or other hard surfaced areas unless: o In the opinion of Canby Utility there is a demonstrable need in order to meet public health, safety requirements including but not limited to alleviation of immediate fire or sanitation hazards. or dust control to meet air quality requirements mandated by the Oregon Department of Environmental Quality; and o Power washing of buildings, roofs and homes prior to painting, repair, remodeling or reconstruction and not solely for aesthetic purposes. Washing cars, trucks, trailers, tractors, or other land vehicles or boats or other water borne vehicles except by commercial establishments of fleet washing facilities which recycle or reuse the water in their washing processes or by bucket and hose with a shut-off mechanism unless Canby Utility finds that the public health, safety and welfare is contingent upon frequent vehicle cleaning such as cleaning of solid waste transfer vehicles, vehicles that transport food and other perishables or otherwise required by law Page 4-4 Water Management and Conservation Plan June 2010 Water Curtailment Element Canby Utility

45 SECTION 5

46 FINAL DRAFT SECTION 5 WATER SUPPLY ELEMENT General This section delineates the anticipated service area of Canby Utility through the planning period and presents population and water demand forecasts. This section also includes a comparison of Canby Utility s supply source capacity and water demands, and a discussion of long-term water supply planning, water rights utilization and mitigation actions. Service Area Assumptions for the Planning Period The current water service area is the area within the existing City of Canby (City) limits. Canby Utility s water system planning area, which includes all land within the current Urban Growth Boundary (UGB), encompasses a total area of approximately 3,465 acres. Plate 1 in Appendix E illustrates the service area. There are no current or future plans to increase or modify the service area apart from the UGB planning process. Population Forecasts The historic annual growth rate for Canby Utility s service area was 2.8 percent from 1990 through This growth rate is consistent with forecasted Clackamas County population forecasts and the Downtown Canby Retail Market Analysis conducted in 2007 by Marketek, Inc. While it can be expected that short-term growth rates may be less than this projected rate of growth, for long-term planning purposes, it is anticipated that future growth rates will parallel these historical trends. This rate is also consistent with the 2.4 percent growth rate used in the 2010 City of Canby Transportation Service Plan. Population forecasts for the water service area were developed based on the 2.8 percent growth rate are presented in Table 5-2. Water Demand Projections Estimates of future water demands were developed from Canby Utility s historical water usage trends from 2005 through 2009 and the population forecasts. For the purposes of this plan, future estimated average daily water usage is assumed to be approximately 138 gallons per capita per day (gpcd). While this usage is stated as gallons per capita per day, this estimate accounts for more than just domestic water use. Total water demand is assigned a per capita value in order to project water demands with increasing population assuming the relative proportion of demand from non-residential users will remain unchanged. Per capita values presented in this plan incorporate water produced for all water users and purposes to include distribution system losses. Water demand planning components are summarized in Table Page 5-1 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

47 FINAL DRAFT Estimated water demands are developed by multiplying the estimated per capita water usage by the anticipated population for that year. To provide an estimate of peak hourly usage, a factor of approximately 1.5 was applied to estimated maximum day demands. This is consistent with water demand patterns of similar communities in the region. Peak month demand and peak season demand (July 1 to September 30) forecasts are also developed based on per capita water demands of 273 gpcd and 230 gpcd, respectively. Water demand forecasts are summarized in Table 5-2. Table 5-1 Water Demand Projection Component Summary Demand Component Water Demand Water Demand ADD Peaking (gpcd) per DUE (gpd) Factor Average Day Demand Peak Season Demand Peak Month Demand Maximum Day Demand Peak Hour Demand 542 1, Table 5-2 Water Demand and Population Projection Summary Water Demand (mgd) Year Population Average Day Demand Peak Season Demand 1 Peak Month Demand 2 Maximum Day Demand , , , Build-out 46, Notes: 1. Peak Season Demand is the average daily demand for the 92 days of the peak water use season; defined as July 1st to September 30th. 2. Peak Month Demand is the maximum 30-day moving average daily demand. The peak month for the Canby Utility system typically occurs between July and August population and water demand values based on historical data. Comparison of Water Demands and Available Source Canby Utility has certificated and permitted water rights on the Molalla River which exceed the anticipated future maximum daily demand in the 20-year planning horizon. The actual available water in the Molalla River varies seasonally such that available supply may be less than the existing maximum daily demand and potentially future average daily demand during the late summer. The Oregon Water Resources Department (OWRD) water availability analysis shows a net available water deficit near the mouth of the Molalla River. There are no records of Canby Utility being unable to adequately meet historical water demand needs Page 5-2 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

48 FINAL DRAFT Because of the uncertainty in available water in the Molalla River, Canby Utility has applied for a water right on the Willamette River near Canby (S71072). While development of a new Willamette River source appears to be the most feasible approach, other source alternatives are still being considered. Canby Utility s recently completed Water System Master Plan recommended a preliminary engineering study to evaluate approaches to expanding the existing water treatment facility capacities to meet to peak day demands during the 20-year planning horizon. This recommended study will examine the costs and operational considerations of expanding capacity at the existing treatment facilities site versus constructing facilities at a new site as well as evaluate all alternatives for using a combination of the Molalla River and Willamette River sources through a 20-year and 50-year planning horizon. Table 5-3 shows a water right development summary. Table 5-3 Water Right and Use Summary Certificated Water Maximum Daily Demand (mgd) Source Water Rights (mgd) Availability (mgd) Current (2010) Future (2030) Saturation Development Molalla River Groundwater Willamette River n/a n/a Total Notes: 1. Estimated Molalla River water availability. OWRD water availability reports cite a deficit of net water availability over June through October (at a 50 percent exceedance analysis at the mouth of the Molalla River). Water availability is based on current diversion and treatment capacity. 2. Pending Willamette River water rights application for 8 mgd. 3. Existing water treatment facilities limited to nominal capacity of 8 mgd. Per Water System Master Plan, development of new source water treatment facilities anticipated within the 20-year planning period. 4. Allocation of demands to sources under the saturation development condition is tentative pending preliminary design and evaluation of approach to additional treatment facilities and review of water rights application by OWRD. Analysis of Alternative Sources As previously identified, Canby Utility s forecasted maximum daily demand (MDD) will approach 10 million gallons per day (mgd) by 2030, with an ultimate build-out MDD of approximately 17 mgd. Canby Utility has water rights for 12.9 mgd from the Molalla River, but low flow summer season water availability is much less. Discussions with Canby Utility and Veolia staff indicate that based on observed water levels during the summer season, additional Molalla River supply beyond the current treatment capacity of approximately 8 mgd, is not anticipated to be available year round. Consequently, Canby Utility may experience the need for an additional source by A new long-term supply source needs Page 5-3 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

49 FINAL DRAFT to be developed to provide an initial approximate capacity of 2 mgd by 2030 and ultimately a capacity of approximately 9 mgd. Figure 5-1 presents Canby Utility s existing supply capacity from the Molalla River source and forecasted maximum daily demand illustrating the timing and capacity needed for additional long-term supply. Water Supply Criteria and Considerations An initial screening of long-term supply alternatives assessed the likelihood that the source will be able to economically meet Canby Utility s long-term water supply needs. The criteria used to screen alternatives are: 1. Access to adequate water rights for long-term needs 2. Source water availability to meet long-term needs during the peak demand season. If the initial screening criteria are satisfied, additional considerations are applied to evaluate alternatives. Based on discussions with Canby Utility staff, these considerations include: 1. Is source development technically feasible? 2. Does the alternative provide source redundancy? 3. Is the alternative affordable? 4. Does the alternative take advantage of partnering opportunities and regional water supply planning? 5. Does the alternative provide Canby Utility with ownership of source facilities? Water Supply Alternatives Through a review of potentially feasible water supply source alternatives and discussions with Canby Utility staff, five long-term supply alternatives were identified for consideration: 1. Expansion of the existing Molalla River supply. 2. Development of expanded or new groundwater supplies, including potential use of Aquifer Storage and Recovery (ASR) as a peaking and emergency source. 3. Water supply from the Clackamas River in partnership with one of the existing Clackamas River water providers. 4. Water supply from the City of Wilsonville Willamette River Water Treatment Plant (WRWTP) with potential joint development of transmission facilities to serve Canby Utility and the Charbonneau area. The City of Sherwood and the Tualatin Valley Water District also hold capacity shares in the WRWTP Page 5-4 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

50 FINAL DRAFT 5. Development of new Willamette River supply intake in or adjacent to Canby, and use of the existing water treatment plant (with upgrades and expansion) or new treatment facilities. Figure 5-1 Forecasted Maximum Daily Water Demand and Available Supply Estimated Maximum Day Demand (mgd) Maximum Day Demand Growth Rate: Historical Base Growth Rate: 2.8% Maximum Growth Rate (Base +10%) Minimum Growth Rate (Base -10%) Supply: Molalla River Needed Surplus Year Water Supply Alternatives Assessment The assessment of each of the five long-term water supply alternatives is presented below. Each alternative was evaluated using the initial screening criteria and then those alternatives meeting the initial screening criteria were further evaluated relative to the five additional considerations described above. Supply Alternative No. 1 Expansion of Molalla River Supply The Molalla River is currently the primary source of water for Canby Utility. This alternative is not the first choice for further development due to the low peak season source water availability. Canby Utility currently holds water rights on the Molalla River for 12.9 mgd Page 5-5 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

51 FINAL DRAFT Supply Alternative No. 2 Expansion of Groundwater Supply Expansion of groundwater supplies is characterized by uncertainty. While this alternative may be feasible from a water rights perspective, the yield and production capacity of the local aquifer is not certain. Water quality and quantity considerations identified in existing local wells also make groundwater unfavorable. It is also unclear whether the development of an ASR system including storage of treated surface water in the local aquifer and then recovery during the peak demand season via multiple injection/recovery wells is feasible. Supply Alternative No. 3 New Supply from the Clackamas River Four municipal water supply providers rely on the Clackamas River as their primary source of supply: the South Fork Water Board (serving West Linn and Oregon City), the Clackamas River Water District, the City of Lake Oswego and the North Clackamas County Water Commission (supplying Sunrise Water Authority, the City of Gladstone, and the Oak Lodge Water District). Based on previous regional supply analyses, these current water providers using the Clackamas River may not be able to develop expanded water supplies to the limits identified in existing water rights permits. New water rights are not anticipated to be available on the Clackamas River and there may be significant obstacles to transmitting water out of the basin to Canby Utility. As such, this alternative is not considered viable at this time. Supply Alternative No. 4 New Supply from the Willamette River via Wilsonville The City of Wilsonville operates a 15 mgd potable water treatment plant on the Willamette River, and along with the Willamette River Water Coalition (WRWC), holds extensive water rights. The City of Sherwood is currently planning to receive potable water from the Willamette River Water Treatment Plant (WRWTP) in the next few years. The Willamette River supply from Wilsonville alternative is feasible in terms of water rights accessibility and water availability. This alternative would deliver potable water to Canby from the WRWTP via a new transmission pipeline. The WRWTP would need to be expanded to produce water for Canby Utility. This alternative provides source redundancy and partnering opportunities may exist with neighboring water providers along the transmission pipeline alignment. The WRWTP was designed and built to accommodate significant treatment capacity expansion. Implementation of this alternative presents some significant challenges. First, a minimum of five miles of transmission piping would be required, but this length could be longer and will depend on the final selected alignment. Second, the treatment plant would need to be expanded. A third challenge pertains to the development of intergovernmental agreements (IGAs) necessary for the purchase of treatment plant capacity and operational agreements. Ultimate development of this Page 5-6 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

52 FINAL DRAFT alternative also depends on public perception in Canby and a favorable community will to develop this source. Supply Alternative No. 5 New Willamette River Intake near Canby From a water rights perspective, developing a new supply from the Willamette River is favorable as there is adequate access to water supply. Canby Utility has a pending water rights application for 8 mgd from the Willamette River at Canby which was applied for in The purpose of the water right is to provide a redundant and alternative source due to the inadequate summertime water availability in the Canby Utility service area. In addition to providing supply source redundancy, this alternative has the benefit of Canby Utility maintaining direct control of the water system. Some partnering may be available with Canby s neighbors if this source were to be developed as a regional supply. Development of a new intake on the Willamette River near Canby will require new transmission piping and treatment, coupled with either a new WTP or treatment at the existing WTP through plant expansion improvements. Use of a new WTP solely for the Willamette River supply will require integration of the new supply into the existing distribution system and will require blending of the existing and new supplies in some parts of the service area. Use of the existing WTP will require blending of the Molalla River and Willamette River sources prior to treatment and all customers will get the same blended supply. An evaluation of expanding the existing WTP as compared to constructing a new WTP is required to determine which one is the optimum long-term supply solution. In general, the cost of developing new capacity at the WRWTP, the existing Canby water treatment plant, or a new water treatment plant will be similar in magnitude, although a plant expansion is typically less expensive than building a new plant. The initial cost to construct 4 to 5 miles of transmission piping from the WRWTP in Wilsonville makes a new Willamette River intake alternative in or near Canby more favorable in terms of project cost. Ultimate development of this alternative also depends on public perception and a favorable community will to develop this source. Recommended Supply Alternative Table 5-4 summarizes the initial screening results which indicate that Alternative Nos. 4 and 5, the Wilsonville Willamette River Supply and the new Willamette River Intake alternatives, are considered feasible from a water rights access and water availability perspective. As presented in the Water System Master Plan (MSA, 2010), the project cost of a new Willamette River treatment facility near Canby is approximately $12 million. Five miles of 24-inch diameter transmission piping will also cost on the order of $12 million, but the additional cost of expanding the WRWTP (including high-head pumping) to supply Canby makes this alternative less favorable from a cost perspective. Alternative No. 5, the new Page 5-7 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

53 FINAL DRAFT Willamette River Intake, appears to have the lower cost and present fewer project challenges and is recommended as the preferred long-term supply source alternative for Canby Utility. Table 5-4 Source Alternative Screening Summary Alternative No Source Alternative Molalla River Expansion Groundwater Expansion Clackamas River Wilsonville Willamette River Supply New Willamette River Intake near Canby Initial Screening Access Availability Yes Yes Yes No No No Yes Yes Yes Yes Comments Low peak season source water availability ASR potential unknown Major transmission piping project required, plus expansion of the WRWTP Closer source; ownership of water rights and water treatment facilities; less expensive total project cost than Wilsonville WRWTP alternative Recommended Preferred Alternatives Description The recommended preferred Willamette River source alternative can be conceptualized as two general alternatives in terms of additional source supply, treatment and storage development. Each alternative, referred to here as Alternatives No. 5A and 5B, is briefly discussed and includes construction of additional distribution system storage in the shortterm to meet existing and future storage needs as presented in Section 2. Both alternatives are suitable for meeting Canby Utility s 20-year planning period water supply needs. Alternative 5A Expansion of existing water treatment plant This alternative consists of an expansion of the existing water treatment facilities and includes land acquisition of adjoining property, construction of a new Willamette River intake structure including raw water pumps and installation of approximately 2.5 miles of raw water transmission piping from the intake to the water treatment plant. The plant would initially be expanded to 10 mgd in 2020 and then to an ultimate 17 mgd beyond the 20-year planning horizon of this study. The existing WTP would be expanded to treat a blended raw water supply from the Willamette River and from the Molalla River. The treated water would be distributed via the existing distribution system and all customers would get the same blended supply. The expanded plant would have to include pretreatment and taste and odor (T&O) control processes at a minimum to be able to adequately treat both supplies Page 5-8 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

54 FINAL DRAFT Alternative 5B Construction of a new 2.0 mgd water treatment plant for the Willamette River supply This alternative consists of construction of a new water treatment facility with a 2.0 mgd capacity in northeast Canby to include land acquisition, construction of a new Willamette River intake structure including raw water pumps and installation of a combination of up to approximately 1.5 miles of raw water transmission piping from the intake to the WTP and finished water transmission piping from the WTP to the distribution system. The new WTP, which would be built in approximately 2020, would have an initial capacity of 2 mgd. The WTP would then be expanded to its ultimate capacity of 9 mgd beyond the 20-year planning horizon of this study. Canby Utility would then operate two WTPs at two different locations. The new Willamette River supply would be integrated into the existing distribution system near the new WTP and therefore some customers would get a predominance of the new supply, while others would continue to receive treated water from the Molalla River supply. It is possible that the new Willamette River WTP would only operate during the peak summer demand months initially, and that the existing Molalla River WTP would operate as the baseline supply facility throughout the year. With selection of proper treatment processes to address all of the raw water quality parameters of concern, the proposed new Willamette River WTP would produce treated water similar in quality to that produced by the Molalla River WTP and customers would not likely notice any differences between the two supplies. The proposed new Willamette River WTP could be a conventional filtration plant very similar to the City of Wilsonville s WRWTP, or it could be a low-pressure membrane filtration plant with post-filter Granulated Activated Carbon (GAC) contactors. A detailed comparison of WTP alternatives is beyond the scope of this study. Under this alternative, the development of source, treatment and pumping redundancy justifies a reduction in the emergency storage planning criteria to a factor of 1.3 of average daily demand (ADD). This will allow for reduced capital costs associated with new storage facilities compared to Alternative No. 5A. Canby Utility will benefit from having two independent water sources, treatment and pumping facilities, which would result in lower emergency storage requirements. Comparison of Willamette River Supply Alternatives Table 5-5 presents the conceptual capital cost of each Willamette River supply alternative considering the impacts on emergency storage needs. It is recommended that a preliminary engineering study be conducted to refine the alternatives and to determine a recommended approach to development of the Willamette River source alternative. For the purposes of this report, Alternative No. 5B is the preferred alternative and recommended source, treatment, storage and transmission improvements are based on this alternative, along with costs for the CIP. It should be noted that the operation of two WTPs per Alternative No. 5A will likely result in higher annual operation and maintenance (O&M) costs compared to operating one plant per Alternative No. 5B. Further, any new treatment Willamette River treatment facility Page 5-9 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

55 FINAL DRAFT should be planned and designed to accommodate the future possibility of also treating Molalla River water as the Molalla River may continue to become more difficult from which to withdraw. The recommended preliminary engineering study should evaluate all cost and non-cost issues associated with both alternatives and confirm the selection of the preferred Alternative 5B. Table 5-5 Concept-Level Source Alternative Costs (20-year planning horizon) Alternative 5A WTP Expansion Year Improvement Estimated Project Cost MG Reservoir $3,000, MG Reservoir $3,000, Intake and transmission 3 $7,900, MGD WTP Expansion $4,000,000 Total $17,900,000 Alternative 5B New Willamette River WTP Year Improvement Estimated Project Cost MG Reservoir $4,500, Intake and transmission 4 $5,400, New 2.0 MGD WTP Plant $7,000,000 Total $16,900,000 Notes: 1) Costs do not include land acquisition. 2) 5% inflation rate assumed base year. O&M costs non-included in present worth calculation. 3) $1.6 million for intake (9 mgd) and 2.5 miles of 24-inch piping at $480/lf. 4) $1.6 million for intake (9 mgd) and 1.5 miles of 24-inch piping at $480/lf. Water Right Implementation Schedule For diversion of water from the Molalla River, Canby Utility holds one certificated water right (86087) for 6.46 mgd and one permitted water right (S46199) green-lighted for 4.8 mgd (7.46 cfs) for the Molalla River. The certificated right is fully implemented and applied to beneficial use delivered from the water treatment plant which has a current capacity of 8 mgd. Per the Extension of Time for Permit Number S-46199, dated December 17, 2004, the time allowed to apply water to beneficial use under this permit has been extended to October 1, A copy of the extension is included in Appendix I. Currently, Canby Utility has rights to diversion of water from the Molalla River in excess of the water treatment plant capacity. Canby Utility does not anticipate further implementation of the Molalla River rights beyond the existing certificated right and green-lighted permit capacity in the 10- year planning horizon. As previously discussed, implementation of additional use of permit S46199 beyond the 10-year planning horizon depends on the outcome of long-term water supply source development studies and will be addressed in the next update of this WMCP Page 5-10 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

56 FINAL DRAFT As discussed in Section 5, Canby Utility has a pending application (S71072) for the Willamette River for use as long-term source water expansion. This application is waiting for review by the OWRD. The development of this source anticipated to be beyond 10 years. The next plan update will further address this application. The groundwater rights held by Canby Utility are all certificated. Mitigation Issues Division 86 rules require water suppliers to provide a description of mitigation actions being taken to comply with legal requirements, such as the Federal Endangered Species Act, Clean Water Act and the Safe Drinking Water Act. Canby Utility is not currently required to complete any mitigation actions. As Canby Utility pursues future development of a surface water supply from the Willamette River, it will be required to address mitigation issues under state and/or federal regulations. Summary This section presents a summary of Canby Utility s water supply needs and reports the status of Canby Utility s long-term water supplies. The long-term water supply needs, to meet maximum day demands through the 20- and 50-year planning horizons, will be approximately 10 and 17 mgd, respectively. Canby Utility anticipates initiating further water treatment capacity expansion planning work within the next 5 years. In an effort to provide maximum cost efficiency in supplying water to its customers, Canby Utility intends to aggressively promote conservation to reduce the peak day demand and thereby stave off the need for treatment capacity expansion as much as is feasible. The outcome of Canby Utility s long-term water supply strategy will be documented in the WMCP update in ten years or sooner Page 5-11 Water Management and Conservation Plan June 2010 Water Supply Element Canby Utility

57 APPENDIX

58 APPENDIX A Previous WMCP Final Order

59

60

61 APPENDIX B WMCP Extension Letter

62

63 APPENDIX C Willamette River Application

64

65

66 APPENDIX D Local Government Comments

67 DRAFT APPENDIX D LOCAL JURISDICTION REVIEW COMMENTS <<City of Canby, Clackamas County Planning Department review comment letters - TO FOLLOW>> Page D-1 Water Management and Conservation Plan June 2010 Appendix D Canby Utility

68 APPENDIX E Water System Map

69 SW HAZELBRUSH CT SW OLD WELL RD N LOCUST ST UT UT S MOLALLA FOREST RD S SEQUOIA PKWY SW 1ST AVE S W ALNUT ST S TOWNSHIP RD SE TOWNSHIP RD 8'' S IVY ST UT UT S MULINO RD N HOLLY ST SE 1ST AVE S HWY 99E S IVY ST S MULINO RD SW PEACH COVE RD S ELM ST N GRANT ST N JUNIPER ST N LOCUST ST N BAKER DR N BIRCH ST NE 16TH AVE NW 13TH AVE NW 12TH AVE S PINE ST N MANZANITA ST S FAWVER RD S BREMER RD SE 1ST AVE NW 10TH AVE N ASPEN CT S BLOUNT RD NW 9TH AVE NW 8TH PL N KNOTT ST NE 4TH AVE S S EQUOIA P KWY N CEDAR ST NW 4TH AVE SE 2ND AVE SE 4TH AVE S LOCUST ST NW BAKER DR S KNOTT ST SW 2ND AVE NW 2ND AVE SW 1ST AVE NW 3RD AVE S TOWNSHIP RD SE TOWNSHIP RD SW 6TH AVE SE 7TH AVE SE 8TH AVE S HAZEL DELL WAY S ROCKY BLUFF LN SW 3RD AVE S PEACH ST SE 9TH AVE SE 10TH AVE S RAILROAD DR S ELM CT S IVY CT N LOCUST ST SW ISLE WAY LN N MAPLE CT N ASH ST NE 2ND AVE NW 6TH AVE NW 5TH AVE N DOUGLAS ST NW 1ST AVE SW 4TH AVE SW 7TH AVE SW 9TH AVE S BER G PKWY SW 12TH AVE SW 13TH AVE SE 13TH AVE B ST S REDWOOD ST S BELLEVUE AVE SE 16TH AVE S FIR ST S IVY ST S TULL RD SW 20TH AVE S HWY 170 S HWY 170 S W FOREST COVE R D S SOUTH E ND RD S SOUTH END RD SW RIVERWOOD DR S NEW ERA RD S NEW ERA RD S HAINES RD S HWY 99E S HAINES RD SE TERRITORIAL RD IA L RD SE TERRITO R S HWY 99E N REDWOOD ST OTTO RD S MULINO RD S WALNUT ST SW HOFFMAN RD SW 35TH DR SW HOF FMAN RD SW MOUNTAIN RD SW MOUNTAIN RD CANBY FERRY NE 37TH AVE NE 37TH AVE NW 31ST AVE N HOLLY ST NE 22ND AVE NW 22ND AVE NE TERRITORIAL RD NW TERRITORIAL RD NE 14TH AVE N MAPLE ST N PINE ST NE 10TH AVE N IVY ST N OAK ST S DOUGLAS ST S LARCH ST SW 6TH PL S TEAKWOOD ST S PONDEROSA ST SE 10TH PL S FIR CT N LAURELWOOD ST E MADRONA LN SW 11TH AVE SE 11TH AVE SE 11TH PL A ST SE 13TH PL S CASS ST SE 14TH AVE S CHINA ST SE 15TH AVE NE 15TH AVE NE 14TH PL NE 11TH AVE SE 3RD AVE S HOLLY ST SW 8TH AV E SW 10TH AVE S SYCAMORE ST S GRANT ST NE 9TH AVE S KNIGHTS BRIDGE RD NW KNIGHTS BRIDGE RD S KNIGHTS BRIDGE RD SE 17TH AVE SE 12TH AVE SE 14TH PL S ELMWO OD LN S B IRCH CT SW PEACH COVE LN NE TERRITORIAL PL N VINE ST N TEAKWOOD ST S CARRIAGE LN NE 10TH PL SW HEBB PARK RD SW RIVERFRONT TER NW RIVER PARK PL SW RI VERL A N E RD N RIVER PARK DR SW RIVE RBEND D R NE 34TH CT NE 21ST AVE NE COU N TRY CLU B DR NE 20TH AVE N LUPINE ST N PONDEROSA ST NW 14TH AVE N FIR ST N ELM ST S WILCOCK RD NE 11TH PL NE 9TH PL N HAWTHORNE CT N BAKER ST N ALDE R ST N CEDAR CT N ASPEN ST NE 3RD AVE SE 1ST AVE NW 6TH PL SE 5TH AVE S M APLE ST SE 6TH PL SW WILLOW ISLAND LN NE 12TH AVE NE 12TH AVE N LOCUST ST N OAK ST NE 1ST AVE NW 5TH DR S JUNIPER ST NW 1ST AVE S OAK PL SE 7TH PL SE 7TH WAY SW 5TH AVE S BIRCH ST SW 5TH AVE NE 16TH AVE NW 14TH AVE NE 13TH AVE N BIRCH ST N BIRCH ST N ASH ST NW 3RD AVE SE 3RD AVE SE 1ST AVE N FIR ST N ELM ST SE 4TH AVE SE TOWNSHIP RD S SEQUOIA PKWY S REDWOOD ST S LUPINE ST SW 4TH AVE SE 8TH AVE SE 9TH AVE SW 7TH AVE SE 10TH AVE S HWY 99E S KING ST SE 11TH LOOP SE 12TH LOOP S ASPEN WAY S LUPINE ST S ELMW O OD DR S ELMWO O D CIR S REDWOOD ST SE 15TH PL SE 16TH AVE Wil l amett e Riv er NE DUTCH VISTA NE SPITZ RD NE 21ST AVE NE 20TH AVE NE 19TH LO OP NE 18TH PL NE 14TH PL NE 13TH PL SE 3RD CT G:\09\1067\408\CAD\GIS\ OR-PLATE 1.mxd Wednesday, May 26, :07:25 AM DKH LEGEND UT 3Ú EXISTING RESERVOIR EXISTING PUMP STATION - EXISTING MAIN RIVER INTAKE!Ü EXISTING SPRINGS GALLERY CITY LIMITS URBAN GROWTH BOUNDARY (UGB) RAILROAD STREAM KEY SITES «1 4TH AVENUE SITE «3 «2 MAIN RIVER INTAKE PUMP STATION PUMPS: 100 HP (2,250 GPM) 150 HP (4,500 GPM) WATER TREATMENT PLANT SITE CLEARWELL: CAP: 2.4 MG OE: 198 FT HIGH SERVICE PUMP STATION PUMPS: 25 HP (270 GPM) 100 HP (2,200 GPM) 200 HP (3,000 GPM) «4 RESERVOIR: CAP: 0.5 MG OE: 185 FT PUMP STATION PUMPS: 40 HP (750 GPM) 13TH AVENUE SITE RESERVOIR A: CAP: 2.0 MG OE: 192 FT RESERVOIR B: CAP: 2.0 MG OE: 192 FT PUMP STATION PUMPS: 50 HP (1,000 GPM) 75 HP (1,600 GPM) CANBY FERRY COUNTR Y CLUB PL NE 23RD AVE N FOREST CT NE 21ST PL NE 17TH AVE N OAK ST NE LAURELWOOD CIR NE 15TH AVE N J U NIPER PL Molalla River NE 14TH PL N HAWTHORNE ST NE 1 3 T H CIR NE 13TH AVE NE 12TH AVE NW 12TH AVE NE 15TH AVE NE 14TH AVE NW 13TH AVE N NO BLE CT N LUPINE CT NW 11TH AVE NW 11TH AVE TERRACE PL N MAPLE LN CLACKAMAS COUNTY FAIRGROUNDS PLATE 1 Water System and Service Area Map June DRAFT ST 99 E ST 99 E 3Ú 3Ú NW 8TH WAY NW 7TH AVE N JUNIPE R CT NE 5TH AVE NW 6TH AVE N KNOTT ST NW 6TH AVE LIA PL NW 5TH AVE NW DA H WATER TREATMENT PLANT SITE BACKWASH PONDS SPRINGS GALLERY RIVER INFILTRATION GALLERY (RIG) & MAIN RIVER INTAKE (MRI) «1 MAIN RIVER INTAKE PUMP STATION 13TH AVE SITE 3Ú «4 S PINE ST N JUNIPER ST OLD RIVER INTAKE (NOT IN USE) 4TH AVE SITE WILLAMETTE RIVER WATER RIGHT APPLICATION POINT OF DIVERSION «2 « SCALE IN FEET

70 APPENDIX F AWWA Water Audit Software

71 DRAFT APPENDIX F AWWA WATER AUDIT SOFTWARE The American Water Works Association (AWWA) Water Loss Control Committee (WLCC) developed water audit software for use by municipal water providers. The AWWA water audit software uses Excel spreadsheets to organize and calculate audit parameters and output. The water audit worksheets are included in this Appendix for reference Page F-1 Water Management and Conservation Plan June 2010 Appendix F Canby Utility

72 AWWA Water Loss Control Committee (WLCC) Water Audit Software v2.0 PURPOSE: This spreadsheet-based water audit tool is designed to help quantify and track water losses associated with water distribution systems and identify areas for improved efficiency and cost recovery USE: The spreadsheet contains several separate worksheets. Sheets can be accessed using the tabs towards the bottom of the screen, or by clicking the buttons on the left below. Descriptions of each sheet are also given below. THE FOLLOWING KEY APPLIES THROUGHOUT: Copyright 2006, American Water Works Association. All Rights Reserved. Value must be entered by user Value may be entered by user Value calculated based on input data Please begin by providing the following information, then proceed through each sheet in the workbook: NAME OF CITY OR UTILITY: COUNTRY: REPORTING YEAR: START DATE(MM/YYYY): END DATE(MM/YYYY): NAME OF CONTACT PERSON: PLEASE SELECT PREFERED REPORTING UNITS FOR WATER VOLUME: Click to advance to sheet Instructions The current sheet TELEPHONE: Ext. Reporting Worksheet Water Balance Definitions Water Loss Standing Enter the required data on this worksheet to calculate the water balance The values entered in the Reporting Worksheet are used to populate the water balance Use this sheet to understand terms used in the audit process Use this sheet to help interpret the results of the performance indicators AWWA Water Loss Control Committee Instructions 1

73 AWWA WLCC Water Audit Software: Reporting Worksheet Copyright 2006, American Water Works Association. All Rights Reserved. Back to Instructions? Click to access definition Water Audit Report for: Reporting Year: WATER SUPPLIED Please enter data in the white cells below. Where possible, metered values should be used; if metered values are unavailable please estimate a value. Indicate this by selecting a choice from the gray box to the left, where M = measured (or accurately known value) and E = estimated. ALL VOLUMES TO BE ENTERED AS ANNUAL QUANTITIES Volume from own sources: Master meter error adjustment: Water Imported: Water Exported:?. WATER SUPPLIED: 0.0. AUTHORIZED CONSUMPTION. Billed metered: Billed unmetered: Unbilled metered: Unbilled unmetered:????. AUTHORIZED CONSUMPTION: WATER LOSSES (Water Supplied - Authorized Consumption). 0.0 Apparent Losses. Unauthorized consumption: Customer metering inaccuracies: Data handling errors:??? Apparent Losses:. 0.0 Real Losses. Real Losses (Water Losses - Apparent Losses):. 0.0 WATER LOSSES: NON_REVENUE WATER. NON-REVENUE WATER:. 0.0.??? Please choose reporting units from the instructions sheet SYSTEM DATA. Length of mains: Number of active AND inactive service connections:?? Connection density:. Average length of private pipe:?. Average operating pressure:? (pipe length between curbstop and customer meter or property boundary). COST DATA. Total annual cost of operating water system:? Customer retail unit cost (applied to apparent losses):? Variable production cost (applied to real losses):? $/Year DATA REVIEW - Please review the following information and make changes above if necessary: - Input values should be indicated as either measured or estimated. You have entered: 0 as measured values 0 as estimated values 18 without specifying measured or estimated - It is important to accurately measure the master meter - you have entered the measurement type as: unspecified - Cost Data: None to evaluate PERFORMANCE INDICATORS Financial Indicators Operational Efficiency Indicators Non-revenue water as percent by volume: Non-revenue water as percent by cost: Annual cost of Apparent losses: Annual cost of Real Losses: Apparent losses per service connection per day: Real losses per service connection per day*: Real losses per length of main per day*: Real losses per service connection per day per meter (head) pressure:? Unavoidable Annual Real Losses (UARL):? Infrastructure Leakage Index (ILI) [Real Losses/UARL]: * only the most applicable of these two indicators will be calculated AWWA Water Loss Control Committee Reporting Worksheet 1

74 AWWA WLCC Water Audit Software: Water Balance Copyright 2006, American Water Works Association. All Rights Reserved. Water Audit Report For: Report Yr: Own Sources (Adjusted for known errors) Water Exported 0.0 Billed Authorized Consumption Billed Water Exported Billed Metered Consumption (inc. water exported) Revenue Water 0.0 Authorized Consumption 0.0 Billed Unmetered Consumption Unbilled Metered Consumption Non-Revenue Water Unbilled Authorized Consumption (NRW) Unbilled Unmetered Consumption 0.0 Water Supplied Unauthorized Consumption 0.0 Apparent Losses Customer Metering Inaccuracies 0.0 Data Handling Errors Water Losses 0.0 Leakage on Transmission and/or Water Imported 0.0 Distribution Mains Real Losses Not broken down Leakage and Overflows at Utility's Storage Tanks Not broken down Leakage on Service Connections Not broken down 0.0 AWWA Water Loss Control Committee Water Balance 1

75 AWWA WLCC Water Audit Software: Definitions Copyright 2006, American Water Works Association. All Rights Reserved. Back to Instructions Item Name Volume from Own Sources Master meter error adjustment Water Imported Water Exported Find Find Find Find Description The volume of treated water input to system from own production facilities An estimate or measure of the degree of any inaccuracy that exists in the master meters measuring the Volume from Own Sources. Please also indicate if this adjustment is because the master meters under-registered (did not capture all the flow) or over-registered (overstated the actual flow) Bulk water purchased to become part of the water supplied. Typically this is water purchased from a neighboring water utility or regional water authority. Be sure to account for any import meter inaccuracy in reporting this volume Bulk water sold and conveyed out of the water distribution system. Typically this is water sold to a neighboring water utility. Be sure to account for any export meter inaccuracy in reporting this volume Authorized Consumption = billed metered + billed unmetered + unbilled metered + unbilled unmetered The volume of metered and/or unmetered water taken by registered customers, the water supplier and others who are implicitly or explicitly authorized to do so by the water supplier, for residential, commercial and industrial purposes. This does NOT include water sold to neighboring utilities (water exported). Authorized consumption may include items such as fire fighting and training, flushing of mains and sewers, street cleaning, watering of municipal gardens, public fountains, frost protection, building water, etc. These may be billed or unbilled, metered or unmetered. Billed Authorized Consumption Unbilled Authorized Consumption Billed Metered Consumption Find All consumption that is billed and authorized by the utility. This may include both metered and unmetered consumption. See "Authorized Consumption" for more information. All consumption that is unbilled, but still authorized by the utility. See "Authorized Consumption" for more information. All metered consumption which is billed. This includes all groups of customers such as domestic, commercial, industrial or institutional. It does NOT include water sold to neighboring utilities (water exported) which is metered and billed. Billed unmetered Consumption Find All billed consumption which is calculated based on estimates or norms but is not metered. This might be a very small component in fully metered systems (for example billing based on estimates for the period a customer meter is out of order) but can be the key consumption component in systems without universal metering. It does NOT include water sold to neighboring utilities (water exported) which is unmetered but billed. Unbilled Metered Consumption Find Metered Consumption which is for any reason unbilled. This might for example include metered consumption of the utility itself or water provided to institutions free of charge. It does NOT include water sold to neighboring utilities (water exported) which is metered but unbilled. Unbilled Unmetered Consumption Find Any kind of Authorized Consumption which is neither billed nor metered. This component typically includes items such as fire fighting, flushing of mains and sewers, street cleaning, frost protection, etc. In a well run utility it is a small component which is very often substantially overestimated. It does NOT include water sold to neighboring utilities (water exported) which is unmetered and unbilled an unlikely case. Water Losses = apparent losses + real losses The difference between System Input and Authorized Consumption. Water losses can be considered as a total volume for the whole system, or for partial systems such as transmission or distribution systems, or individual zones. Water Losses consist of Real Losses and Apparent Losses. Apparent Losses = unauthorized consumption + meter under-registration + data handling errors Includes all types of inaccuracies associated with customer metering as well as data handling errors (meter reading and billing), plus unauthorized consumption (theft or illegal use). NOTE: Over-registration of customer meters, leads to under-estimation of Real Losses. Under-registration of customer meters, leads to over-estimation of Real Losses. Unauthorized Consumption Customer Metering Inaccuracies Data Handling Errors Find Find Find Includes water illegally withdrawn from hydrants, illegal connections, bypasses to consumption meter or meter/meter reading equipment tampering. Apparent water losses caused by customer meter inaccuracies. Apparent water losses caused by data handling errors in the meter reading and billing system. AWWA Water Loss Control Committee Definitions 1

76 Real Losses Physical water losses from the pressurized system and the utility s storage tanks, up to the point of customer consumption. In metered systems this is the customer meter, in unmetered situations this is the first point of consumption (stop tap/tap) within the property. The annual volume lost through all types of leaks, breaks and overflows depends on frequencies, flow rates, and average duration of individual leaks, breaks and overflows. Non-Revenue Water Revenue Water Length of mains Number of active AND inactive service connections Find Find = Apparent Losses + Real Losses + Unbilled Metered + Unbilled Unmetered Water which does not provide any revenue to the utility Water which is charged to customers to provide revenue to the utility. Length of all pipelines (except service connections) in the system starting from the point of system input metering (for example at the outlet of the treatment plant). Number of service connections, main to curb stop. Please note that this includes the actual number of distinct piping connections whether active or inactive. This may differ substantially from the number of Customers (or number of accounts) Connection density Average length of private pipe Average Operating Pressure Find Find =number of connections / length of mains This is the distance between the curbstop and the customer meter, or from the curbstop to the building line (first point of customer consumption) if customers are unmetered. The average pressure may be approximated when compiling the preliminary water audit. Once routine water auditing has been established, a more accurate assessment of average pressure should be pursued. If the water utility infrastructure is recorded in a Geographical Information System (GIS) the average pressure at many locations in the distribution system can be readily obtained. If a GIS does not exist, a weighted average of pressure data can be calculated from water pressure measured at various fire hydrants scattered across the water distribution system. Total Annual Cost of Operating the Water System Find These costs include those for operations, maintenance and any annually incurred costs for long-term upkeep of the system, such as repayment of captial bonds for infrastructure expansion or improvement. Typical costs include employee salaries and benefits, materials, equipment, insurance, fees, administrative costs and all other costs that exist to sustain the drinking water supply. These costs should not include any costs to operate wastewater, biosolids or other systems outside of drinking water. Customer Retail Unit Cost Find The Customer Retail Unit Cost represents the charge that customers pay for water service. This unit cost is applied to the components of apparent loss, since these losses represent water reaching customers but not (fully) paid for. It is important to compile these costs per the same unit cost basis as the volume measure included in the water audit. For example, if all water volumes are measured in million gallons, then the unit cost should be dollars per million gallon ($/mil gal). The software allows the user to select the units that are charged to customers (either $/1,000 gallons, $/hundred cubic feet or $/1,000 liters) and automatically converts these units to the units that appear in the "WATER SUPPLIED" box. Since most water utilities have a rate structure that includes a variety of different costs based upon class of customer, a weighted average of individual costs and number of customer accounts in each class can be calculated to determine a single composite cost that should be entered into this cell. Variable Production Cost (applied to Real Losses) Find The cost to produce and supply the next unit of water. (E.g., $/million gallons) This cost is determined by calculating the summed unit costs for ground and surface water treatment and all power used for pumping from the source to the customer. It should also include the unit cost of bulk water purchased as an import if applicable. Unavoidable Annual Real Losses (UARL) Find UARL (gallons/day)=(5.41lm Nc + 7.5Lp) xp, or UARL (litres/day)=(18.0lm + 0.8Nc Lp) xp where: Lm = length of mains, (miles or kilometers) Nc = number of service connections Lp = total length of private pipe, (miles or km) = Nc x average distance of private pipe The UARL is a theoretical reference value representing the technical low limit of leakage that could be achieved if all of today's best technology could be successfully applied. It is a key variable in the calculation of the Infrastructure Leakage Index (ILI). It is not necessary that water utilities set this level as the target level of leakage, unless water is unusually expensive, scarce or both. NOTE: The UARL calculation has not yet been fully proven as effective for very small water distribution systems. If, (Lm x 32) + Nc < 3000 (gallons per day) or (Lm x 20) + Nc < 3000 (liters per day) then the the calculated UARL value may not be valid. The software does not display a value of UARL or ILI if either of these conditions is true. Infrastructure Leakage Index (ILI) Find The ratio of the Current Annual Real Losses (Real Losses) to the Unavoidable Annual Real Losses (UARL). The ILI is a highly effective performance indicator for comparing (benchmarking) the performance of utiliites in operational management of real losses. AWWA Water Loss Control Committee Definitions 2

77 AWWA WLCC Water Audit Software: Determining Water Loss Standing? Copyright 2006, American Water Works Association. All Rights Reserved. Back to Instructions Once data has been entered into the Reporting Worksheet, the performance indcators are automatically calculated. How does a water utility operator know how well his or her system is performing? The AWWA Water Loss Control Committee provided the following table to assist water utilities is gauging an approximate Infrastructure Leakage Index (ILI) that is appropriate for their water system and local conditions. The lower the amount of leakage and real losses that exist in the system, then the lower the ILI value will be. Note: this table offers an approximate guideline for leakage reduction target-setting. The best means of setting such targets include performing an economic assessment of various loss control methods. However, this table is useful if such an assessment is not possible. General Guidelines for Setting a Target ILI (without doing a full economic analysis of leakage control options) Target ILI Range Financial Considerations Operational Considerations Water resources are costly to develop or purchase; ability to increase revenues via water rates is greatly limited because of regulation or low ratepayer affordability. Operating with system leakage above this level would require expansion of existing infrastructure and/or additional water resources to meet the demand. Water Resources Considerations Available resources are greatly limited and are very difficult and/or environmentally unsound to develop. > Water resources can be developed or purchased at reasonable expense; periodic water rate increases can be feasibly imposed and are tolerated by the customer population. Existing water supply infrastructure capability is sufficient to meet long-term demand as long as reasonable leakage management controls are in place. Water resources are believed to be sufficient to meet long-term needs, but demand management interventions (leakage management, water conservation) are included in the longterm planning. > Cost to purchase or obtain/treat water is low, as are rates charged to customers. Superior reliability, capacity and intregrity of the water supply infrastructure make it relatively immune to supply shortages. Water resources are plentiful, reliable, and easily extracted. Greater than 8.0 Less than 1.0 Although operational and financial considerations may allow a long-term ILI greater than 8.0, such a level of leakage is not an effective utilization of water as a resource. Setting a target level greater than other than as an incremental goal to a smaller long-term target - is discouraged. If the calculated Infrastructure Leakage Index (ILI) value for your system is 1.0 or less, two possibilities exist. a) you are maintaining your leakage at low levels in a class with the top worldwide performers in leakage control. b) A portion of your data may be flawed, causing your losses to be greatly understated. This is likely if you calculate a low ILI value but do not employ extensive leakage control practices in your operations. In such cases it is beneficial to validate the data by performing field measurements to confirm the accuracy of production and customer meters, or to identify any other potential sources of error in the data. AWWA Water Loss Control Committee Water Loss Standing 1

78 AWWA Water Audit Software Version 2.0 Developed by the Water Loss Control Committee of the American Water Works Association October 2005 ACKNOWLEDGMENTS DEVELOPED BY: ANDREW CHASTAIN-HOWLEY, Water Prospecting and Resource Consulting ANDREW DAY, Water Prospecting and Resource Consulting DAVID GOFF, P.E. Goff Water Audits & Engineering GEORGE KUNKEL, P.E. Philadelphia Water Department ALAIN LALONDE, Veritec Consulting DAVID SAYERS, Delaware River Basin Commission REFERENCES: - Alegre, H., Hirner, W., Baptista, J. and Parena, R. Performance Indicators for Water Supply Services. IWA Publishing Manual of Best Practice Series, ISBN Kunkel, G. et al, Water Loss Control Committee Report: Applying Worldwide Best Management Practices in Water Loss Control. Journal AWWA, 95:8:65 AWWA Water Loss Control Committee Water Loss Standing 2

79 APPENDIX G Previous Water Rate Structure

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83 APPENDIX H Adopted Water Rate Structure

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89 APPENDIX I Water Rights Information

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95 STATE OF OREGON COUNTY OF CLACKAMAS CERTIFICATE OF WATER RIGHT THIS CERTIFICATE ISSUED TO CITY OF CANBY PO BOX 1070 CANBY OR confirms the right to use the waters of MOLALLA RIVER, a tributary of the Willamette River for MUNICIPAL USE. This right was perfected under Permit The date of priority is JULY 3 1, 1970, FOR 5.0 CUBIC FEET PER SECOND (CFS) AND DECEMBER 22, 1970, FOR 5.0 CFS. The amount of water to which this right is entitled is limited to an amount actually used beneficially, and shall not exceed 10.0 CFS, being 10.0 CFS from New River Intake and 3.12 CFS from Original River Intake in any combination, or its equivalent in case of rotation, measured at the points of diversion, if available at the Original River Intake. The points of diversion (POD) are located as follows: POD Twp Rng Mer Sec Original River Intake 3 S 1 E WM 32 New River Intake 4 S 1 E WM 5 Q-Q NW SE NW NE Measured Distances 1830 FEET NORTH & 2130 FEET WEST FROM SE CORNER, SECTION FEET SOUTH & 2400 FEET WEST FROM NE CORNER, SECTION 5 A description of the place of use to which this right is appurtenant is as follows: NOTICE OF RIGHT TO PETITION FOR RECONSIDERATION OR JUDICIAL REVIEW This is an order in other than a contested case. This order is subject to judicial review under ORS Any petition for judicial review must be filed within the 60-day time period specified by ORS (2). Pursuant to ORS and OAR , you may either petition for judicial review or petition the Director for reconsideration of this order. A petition for reconsideration may be granted or denied by the Director, and if no action is taken within 60 days following the date the petition was filed, the petition shall be deemed denied. In addition, under ORS any person with an application, permit or water right certificate subsequent in priority may jointly or severally contest the issuance of the certificate at any time before it has issued, and after the time has expired for the completion of the appropriation under the permit, or within three months after issuance of the certificate. Application S jwg Page 1 of 3 Certificate 86087

96 Application S jwg Page 2 of 3 Certificate 86087

97 When required by the Department, the water user shall install and maintain a headgate, an in-line flow meter, weir, or other suitable device for measuring and recording the quantity of water diverted. The type and plans of the headgate and measuring device must be approved by the Department prior to beginning construction and shall be installed under the general supervision of the Department. Water may be applied to lands which are not specifically described above, provided the holder of this right complies with ORS (3). The right to the use of the water for the above purpose is restricted to beneficial use on the lands or place of use described. The use of water allowed herein may be made only at times when sufficient water is available to satisfy all prior rights, including prior rights for maintaining instream flows. Issued MAR Water Resources Department Application S jwg Page 3 of 3 Recorded in State Record of Water Right Certificates numbered

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122 APPENDIX J Canby Utility Board Resolution No. 124

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126 APPENDIX K Community Outreach and Education Samples

127 FINAL DRAFT APPENDIX K COMMUNITY OUTREACH AND EDUCATION SAMPLES This appendix includes sample informational fliers that will emphasize water saving tips, provide general facts on usage, request voluntary actions to curtail water use, and inform customers of water quality. Canby Utility is in the process of developing these fliers. Utility representatives will give presentations on water conservation to local school children. Presentations include book covers and maps for the audience, contests and tours of the water treatment plant, all of which emphasize the importance of conservation and maintaining the quality of our water supplies. The water box is a collection of teacher lead experiments for kids 8-11 years old with a teacher s handbook, pupil s booklets and posters. Two kits are available, each having enough supplies for 30 kids. The experiments include supplies and instructions to demonstrate: Natural Water Cycle Water Treatment Cycle The state of water and the natural water cycle The production of drinking water The distribution of drinking water The treatment of waste water 1. Variations in Water Volume 2. Evaporation 3. Condensation 4. Precipitation 5. Flocculation / Sedimentation 6. Filtration 7. Eliminating Smells (Odor removal) 8. Water Hardness 9. ph 10. The relationship between water height and pressure 11. Water Towers 12. The Siphon 13. Solubility 14. The relationship between density and buoyancy 15. Removing Sand and Oil Page K-1 Water Management and Conservation Plan June 2010 Appendix K Canby Utility

128 CANBY UTILITY Canby Utility is committed to helping customers take an active role to conserve water. When it comes to water use both inside and outside the home, most families tend to use a lot of water for the lawn and garden, washing the car, showers, laundry and more. Learning to use less water makes a big impact on your bills. You can save hundreds of gallons by taking simple steps around your home. Here s what you can do to conserve water outside your home: 1 Let your grass grow. Longer grass loses less water to evaporation than short grass. Mowing too frequently means your yard will need more water. Wait until your grass reaches at least three inches before mowing. Then, set your mower to its highest setting. This encourages deep roots and effective use of moisture already in the soil. 2 Water your lawn when absolutely necessary and during cool parts of the day. This reduces evaporation and gives plants a chance to absorb the water. Also, for problem areas, use a watering can instead of watering your entire lawn or garden. The best time to water is before 10:00 am and after 6:00 pm. 3 Make sure sprinklers only water lawn. Adjust all sprinkler heads so water does not hit sidewalks or driveways. Also, avoid watering your lawn and garden on windy days. 4 Use a shut-off nozzle when watering. This saves water when you use a hose to water plants. 5 Choose xeriscape plants. A landscape of drought resistant and native plants will use less than half the water of a traditional yard, if maintained properly. Ask your local gardening center about xeriscape plants. 6 Use a broom to clean driveways and sidewalks instead of the hose. 7 Don t leave your hose running while washing your car. Use a bucket of water, put a non-drip nozzle Fix leaks and drips inside and outside your home. This can save up to 600 gallons per month for every leak stopped. on your hose, and rinse quickly when finished. This can save up to 150 gallons each time you wash. 8 Place mulch or bark around trees and plants. This retains moisture, slows evaporation, and may save 750 to 1500 gallons of water per month. 9 Use a rain gauge, or empty can, to track rainfall on your lawn. Then reduce your watering accordingly. 10 Be careful where you plant. Avoid planting in areas that are hard to water such as steep inclines and isolated strips along sidewalks and driveways. This prevents losing water to runoff and watering areas that do not need it.

129 Being aware of how you use water inside can lead to additional water conservation and money savings. Here are tips on how to conserve water inside your home: 1 Reuse water. Wash fruits and vegetables in a bowl of water, and then reuse the water for watering houseplants. You can also water plants with fish tank water, rainwater collected from downspouts or by using leftover melted ice. 2 Do not use garbage disposal. Garbage disposals require electricity and water running through them to flush away food waste. Consider composting your food or just scrape leftovers in the garbage to save water and energy. 3 When washing dishes by hand, do not leave water running. If you have two sinks, fill one sink with soapy water and the other with rinse water. If you have one sink, use a spray device and short blasts when rinsing. This can save gallons per month. 4 Keep a pitcher of drinking water in the refrigerator. This provides cold drinking water at all times without having to run the faucet while waiting for water to get cold. It ensures every drop is for drinking instead of going down the drain. 5 Only run laundry and dishwasher when full. This saves up to 1,000 gallons per month. 6 When brushing teeth, washing hands, or shaving, do not leave water running. Turning the water off during these activities can save gallons per month. 7 Buy a water heater that fits your needs. Make sure you are buying the right size water heater. Buying a heater that is too big will cost you extra money because you will be heating water that you do not need. This is a waste of energy and money. 8 Replace old toilets with high efficiency models. Or, simply place a plastic bag or container filled with pebbles and water in your tank. Water displacement will reduce the amount of water per flush. 9 Do not defrost food with running water. Either place in refrigerator in advance or defrost food in microwave. This saves gallons per month. 10 Install low flow showerheads and shorten your showers. Reducing shower time even one or two minutes can save up to 150 gallons per month while a low flow showerhead can save up to 20,000 gallons of water a year. Water is a resource worth saving because there is no equivalent on earth. We all share the same water so we must each do our part to conserve and protect this precious resource. Every Drop Counts! For more information about water conservation or water rates, please contact Canby Utility at: You can receive additional helpful tips online at CANBY UTILITY 2010 Goldstreet Design Agency, Inc. All Rights Reserved

130 APPENDIX L Leak Detection Report (2009)

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151 APPENDIX M Policy for Excessive Water Use