Water Management and Conservation Plan

Transcription

1 Water Management and Conservation Plan May 2013 Prepared for City of Redmond, Oregon Prepared by

2 Contents Executive Summary... ES-1 Description of Municipal Water Supplier... ES-1 Water Conservation... ES-2 Water Curtailment... ES-4 Water Supply... ES-5 1. Water Supplier Plan Elements Introduction Plan Requirement Plan Organization Affected Local Governments Plan Update Schedule Time Extension Water Supplier Description Background Water Sources Interconnections with Other Systems Intergovernmental Agreements Service Area Description and Population Records of Water Use Annual Demand Monthly Demand Seasonal Demand Per Capita Demand Customer Characteristics and Use Patterns Monthly Water Use Seasonal Water Use Largest Water Users Water Losses and Non-Revenue Water City of Redmond Water Rights Aquatic Resource Concerns Evaluation of Water Rights/Supply

3 System Description Water Conservation Progress Report and Current Conservation Measures Use and Reporting Program Required Conservation Programs Expanded Use under Extended Permits Additional Requirements Curtailment Plan Introduction History of System Supply Deficiencies Curtailment Levels and Event Triggers Authority Curtailment Plan Implementation and Enforcement Water Supply Delineation of Service Areas Population Projections Demand Forecast Schedule to Exercise Permits and Comparison of Projected Need to Available Sources Alternative Sources Quantification of Projected Maximum Rate and Monthly Volume Mitigation Actions under State and Federal Law New Water Rights Exhibits ES-1 Water Curtailment Stages 1 Through 5 and Their Potential Initiating Conditions 2-1 City of Redmond Current and Future Service Area Map and System Schematic 2-2 Components of the IWA/AWWA Water Balance, million gallons per year 2-3 Average Day, Maximum Day, 3-day Maximum Day, Maximum Monthly Demands, and Peaking Factor, Annual Production, Average Day Demand and Maximum Day Demand, Peaking Factors, Monthly Average Day Demand, Historical Seasonal Demand and Seasonal Average Temperature at Roberts Field,

4 2-9 Average Day Demand Per Capita Demands 2-10 City of Redmond Number of Accounts by Customer Category (MG), Metered Consumption by Customer Category, Percentage of Water Use by Consumption Category, Monthly Metered Consumption by Customer Category, Seasonal Water Consumption by Customer Category, Top Water Consumers, July 2010-June Historical Non-Revenue Water 2-17 City of Redmond Water Rights for Potable Municipal Water Use 2-18 City of Redmond Water Rights for Non-Potable Municipal Water Use 2-19 City of Redmond Instream Leases for Water Rights on COID s Certificate Listed Fish Species in the Upper Deschutes River within the Reach of the City s Point of Diversion 2-21 Municipal Well Characteristics 2-22 Summary of System Reservoirs 2-23 Summary of Existing Pump Stations 2-24 Summary of Pipeline Sizes 3-1 Water Conservation Progress Report. 3-2 Monthly Consumption Charges as of July Water Curtailment Stages 1 Through 5 and Their Potential Initiating Conditions 5-1 Projected Population Projections and MDD in 10 Years and 20 Years 5-2 Projected MDD 5-3 City of Redmond Projected MDD and Water Rights 5-4 City of Redmond Projected MDD with 10 Percent Conservation and Water Rights Appendices A Letters to Local Governments B City of Redmond Municipal Code C City of Redmond Lawn Watering Guide

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6 Executive Summary The City of Redmond (City), located in Central Oregon, is known for its close proximity to a multitude of recreational opportunities and for having the region s only commercial airline service airport, Roberts Field. The City of Redmond operates a public drinking water system and had an estimated service area population of 26,305 in The purpose of this Water Management and Conservation Plan (WMCP or Plan) is to guide development, financing and implementation of water management and conservation programs that ensure sustainable water use, as well as to consider the City s future water needs. The goal in preparing this WMCP is to establish a working document, consistent with the City s adopted water and sewer master plan, which will have a positive effect on how the City water system develops in future years. This WMCP is an update of the City s WMCP, as required by Oregon Water Resources Department s (OWRD) final order approving the City s previous WMCP in The OWRD requires cities to develop a WMCP either as part of a new water use permit or as part of an extension of time for an existing water use permit. This WMCP fulfills the requirements of the Oregon Administrative Rules (OARs) adopted by the Water Resources Commission in November 2002 (OAR Chapter 690, Division 86) regarding WMCPs. It describes water management, water conservation, and water curtailment programs to guide the wise use and stewardship of the City s water supply, as well as projected water supply needs. Description of Municipal Water Supplier The City s current source of water is exclusively groundwater from the Deschutes Formation, a thick sequence of interbedded volcanic lava flows and sediments that are highly permeable. The City withdraws groundwater using seven wells with a combined capacity of approximately 12,900 gallons per minutes, chlorinates the water at each wellhead as water enters the system or storage, and then conveys it to 9,154 accounts representing residential, multi-family, and commercial customers. The City s water system serves the area within the present Redmond city limits. The City s potable water supply comes from five water rights totaling cubic feet per second (cfs) or 12.8 million gallons per day (mgd). The City also holds one pending application for a permit (Application G-14908) for 25 cfs (16.2 mgd). A limited use license (LL-1420) for the use of 9.7 cfs (5.1 mgd) is being used by the City as a bridge to the issuance of the permit for Application G In addition, the City holds water rights for non-potable municipal water use, has numerous water rights on Central Oregon Irrigation District s (COID) Certificate 83571, and holds permanent mitigation credits developed through the Deschutes Basin Groundwater Mitigation program. ES-1

7 Executive Summary Water Conservation OWRD s WMCP rules require municipal water providers to have 5-year benchmarks for initiating or expanding conservation measures related to required conservation programs. The following is a summary of the City s activities associated with the required conservation measures and the 5-year benchmarks for implementing those measures, which are described in Section 3 of this WMCP. Five-Year Benchmarks for Required Existing or Expanded Conservation Measures 1. Annual Water Audits The City conducts an annual water audit, which involves comparing the annual amount of water produced by the City s seven water wells to the annual amount of water consumed by customers (as shown by meter readings) to determine the amount of unaccounted for water. Water withdrawn from hydrants is accounted for, as well. AMR (Automated Meter Reading) technology facilitates the City s water audit. The City recently became fully metered upon completing installation of the AMR system. The City does not have unmetered authorized uses nor known unmetered unauthorized uses of water. In 2011, the City s unaccounted for water was calculated to be 9.3 percent. Five-year Benchmark: The City will continue to audit its water system monthly and to summarize the results of the monthly water audits on an annual basis. 2. System-wide Metering The City s water system is fully metered. Five-year Benchmark: The City will continue to require all new connections to be metered. 3. Meter Testing and Maintenance In 2010, the City completed a system-wide meter replacement program coupled with the installation of fixed base AMR, such that AMR equipment is now installed on all meters and readings are taken four times per day. AMR enables the City to identify meter malfunctions much sooner than with a monthly reading system, such that the City can promptly notify customers of a leak and repair non-registering meters. All large meters are tested on an annual basis. Large meters that can be repaired are retrofitted with AMR registers and those that can no longer be repaired are replaced with new AMR meters. All large meters are now read multiple times per day. The oldest small meters in the City s system are 3 years old and the City tests small meters when AMR readings detect issues with their measurements. In 2006, the City began replacing all source meters with magnetic meters having newer technology to improve measuring accuracy and reliability. To date, all source meters have been replaced with magnetic meters except Well 1, which the City is in the process of evaluating for upgrade or replacement. Meters are tested and calibrated according to the manufacturer s specifications. ES-2

8 Executive Summary Five-year Benchmark: The City will continue to conduct its meter testing and replacement program over the next 5 years. 4. Water Rate Structure The City has a monthly basic charge based on meter size and a consumption charge, which is based on the quantity of water metered at the service connections. The current service charge is $1.08 per 100 cubic feet of water used. Five-year Benchmark: The City will continue to bill customers based, in part, on the quantity of water metered at the service connection. 5. Leak Detection and Pipeline Repair or Replacement The City s unaccounted for water, and therefore its system leakage, was calculated to be approximately 9.3 percent in The City is diligently continuing its leak detection and repair program. The City s leak detection and repair program consists of an AMR record review, a water audit, an asset management program, and compiling and addressing a capital maintenance list. Five-year Benchmark: The City will continue its leak detection and repair initiatives, as well as monitoring unaccounted for water. If unaccounted for water exceeds 10 percent, then the City will implement additional leak detection and repair measures. 6. Public Education The City has a public education program that includes water conservation publications in print and on the City s Web site, outreach at community events, presentations, and partnerships. The City developed a series of pamphlets, brochures, and door hangars to promote efficient water use. The City also created a lawn watering guide to address the great increase in demand for City water resulting from turf irrigation in the spring and summer. The City, worked with an organization called resource to develop xeriscaping brochures in The City utilizes its Web site to help promote water conservation. Featured on the page is the current free water conservation showerhead program. The Web site also holds information on City irrigation regulations and water efficient landscaping. Web site users are able to download An Introduction to Xeriscaping in the High Desert and Pictorial Plant Guide for Central & Eastern Oregon. Public outreach at local events has also been a part of the public educations strategy. The City has partnered with other water departments and public entities to host water conservation booths at community events and has given water conservation presentations in local schools. With the completion of the AMR system, the Water Division hopes to dedicate more funds toward conservation programs. ES-3

9 Executive Summary Five-year Benchmark: The City will continue to maintain and update its print materials and Web pages related to water conservation. The City will continue to share water conservation information at community events and through presentations at schools. In addition to these required measures, Section 3 of the WMCP highlights additional conservation measures implemented by the City including: technical and financial assistance, retrofit/replacement of inefficient fixtures, water rate structure and billing schedule, and reuse, recycling, and non-potable water opportunities. Water Curtailment The City has developed a curtailment plan that describes how it will respond to specific watershortage conditions. The curtailment stages and potential initiating conditions are summarized in Exhibit ES-1. Initiating conditions and response actions are detailed in Section 4 of this WMCP. EXHIBIT ES-1. Water Curtailment Stages 1 Through 5 and Their Potential Initiating Conditions Curtailment Stages Stage 1: Water Shortage Advisory Demand Reduction Target: percent of MDD Stage 2: Moderate Water Shortage Alert Demand Reduction Target: percent of MDD Stage 3: Severe Water Shortage Alert Demand Reduction Target: percent of MDD Potential Initiating Conditions Water supply shortage of 0-15 percent of MDD Minor maintenance work or damage repair is required at water pumps, mains, or reservoirs A prolonged period of hot dry weather is forecasted Catastrophic fire Water supply shortage of 0-20 percent of MDD Minor maintenance work or damage repair is required at water pumps, mains, or reservoirs Water demand levels indicate more stringent and systematic responses to the shortage are needed. Stage 1 water reduction goals are not met Water supply shortage of percent of MDD Minor damage to the water system resulting from a natural disaster or criminal act High system demand during the peak summer season Prolonged period of hot dry weather Failure of minor parts of the water system Temporary loss of a supply well Stage 1 and 2 water reduction goals are not met. Stage 4: Critical Water Shortage Alert Demand Reduction Target: percent of MDD Stage 5: Water Shortage Emergency Demand Reduction Target: percent of MDD Water supply shortage of percent of MDD Serious damage to the water system resulting from a natural disaster or criminal act Failure of a significant part of the water system Loss of one or multiple supply wells Serious drought Isolated contamination of the water supply Water supply shortage of 40 percent of MDD or greater, or system wide failure Extensive damage to the water system resulting from a natural disaster or criminal act Failure of a critical water system component Potentially harmful contamination of the entire water supply ES-4

10 Executive Summary Water Supply The City s future water delivery area is delineated by the Urban Growth Boundary (UGB) and/or Urban Reserve Area and includes the City s current water delivery area. The City s projected population for its water delivery area in 10 years (2021) is 38,807 and in 20 years (2031) is 51,661. The population projections are based on the June 2004 EcoNorthwest study called Findings in Support of Population Forecast, which the City commissioned to help with its planning efforts. The City s projected maximum day demand (MDD) in 10 years (2021) is 32.7 cfs (21.1 mgd) and in twenty years (2031) is 43.5 cfs (28.1 mgd). Once the permit associated with Application G is issued, the City will have a total of 44.9 cfs (29 mgd) in water rights capacity and will be able to meet the City s projected MDD through ES-5

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12 1. Water Supplier Plan Elements This section satisfies the requirements of OAR This rule requires a list of affected local government to whom the plan was made available, and a proposed date for submittal of an updated plan. Introduction Central Oregon has experienced periods of rapid growth over the past two decades. Population growth, community water needs, environmental concerns, and escalating water supply development costs, all serve to make water management planning an important issue for the City of Redmond (City). The purpose of this Water Management and Conservation Plan (WMCP or Plan) is to guide development, financing and implementation of water management and conservation programs that ensure sustainable water use, as well as to consider the City s future water needs. The goal in preparing this WMCP is to establish a working document, consistent with the City s adopted water and sewer master plan, which will have a positive effect on how the City water system develops in future years. Plan Requirement The City s groundwater permit G required the submittal of a WMCP. That WMCP was approved by Oregon Water Resources Department (OWRD) in July As required by OWRD s final order approving the WMCP, the City has developed this updated WMCP. This WMCP meets all the requirements of the Oregon Administrative Rules (OAR) adopted by the Water Resources Commission in November 2002 (OAR Chapter 690, Division 86) regarding WMCPs. Plan Organization The WMCP is organized into the following sections, each addressing specific sections of OAR Chapter 690, Division 86. Section 2 is a self-evaluation of the City s water supply, water use, water rights and water system. The information developed for Section 2 is the foundation for the sections that follow. The later sections use this information to consider how the City can improve its water conservation and water supply planning efforts. The WMCP also includes appendices with supporting information. Section Requirement Section 1 Water Supplier Plan OAR Section 2 Water Supplier Description OAR Section 3 Water Conservation Element OAR Section 4 Water Curtailment Element OAR Section 5 Water Supply Element OAR

13 1. Water Supplier Plan Elements The City has relied on information from the following sources in preparing this plan: City of Redmond Wastewater (Collection System) and Water System Master Plan [CH2MHill, December 2007] City of Redmond Public Works Staff City of Redmond Community Development Staff Portland State University Population Research Center District 11 Watermaster s Office Oregon Water Resources Department (OWRD) Affected Local Governments OAR (5) The following local governmental agencies may be affected by this WMCP: City of Redmond Deschutes County In addition, the City provided Central Oregon Irrigation District with notice of the draft plan as a courtesy. Thirty days before submitting this WMCP to OWRD, the City made the draft WMCP available for review by each affected local government listed above along with a request for comments relating to consistency with the local government s comprehensive land use plan. The letters requesting comment are in Appendix A. The City received no comments. Plan Update Schedule OAR (6) The City anticipates submitting an update of this WMCP within 10 years of the final order approving this WMCP. As required by OAR Chapter 690, Division 86, a progress report will be submitted within 5 years of the final order. Time Extension OAR (7) The City is not requesting additional time to implement metering or a previous benchmark. 1-2

14 2. Water Supplier Description This section satisfies the requirements of OAR This rule requires descriptions of the City s water sources, water delivery area and population, water rights, and adequacy and reliability of the existing water supply. The rule also requires descriptions of the City s customers and their water use, the water system, interconnections with other water suppliers, and quantification of system leakage. Background In 1905, Frank and Josephine Redmond settled on a site next to a proposed main irrigation canal and the Oregon Trunk Railroad tracks. Water filled the canal in 1906 and Central Oregon Irrigation District officials platted the town site called Redmond. The railroad arrived in 1911 and the intersection of Highways 97 and 126 helped give the City of Redmond (City) the nickname The Hub of Central Oregon. The City s High Desert community rests on a plateau at an elevation of 3,077 feet above sea level and is located 144 miles southeast of Portland. The City s climate is semi-arid, having an annual average precipitation of 7.3 inches and annual average snowfall of 4.8 inches 1. Average temperatures from 2006 to 2011 ranged from approximately 38 to 87 degrees in the summer (June-September) and 19 to 52 degrees in the winter (December to March), although occasionally temperatures dropped below 0 degrees (F). Today, the City operates under a home rule charter adopted in 1980 with an elected mayor and six city council members. The City Council delegates administrative authority to the City staff. The City Manager has administrative responsibilities for the Airport, Police, Community Development, and Public Works Departments. The Public Works Department - Water Division is responsible for operation and maintenance of the City s community water system. Water Sources OAR (1) The City s current municipal water source is exclusively groundwater. Seven wells withdraw groundwater from the aquifer within the Deschutes Formation, a thick sequence of interbedded volcanic lava flows and sediments that are highly permeable. Historically, the City relied on a surface water system. In its initial years, the City pumped water from the Deschutes River to a 500,000 gallon reservoir located on the top of Forked Horn Butte. During the 1930s, the City secured surface water rights from Central Oregon Irrigation District (COID), which had a canal located on the eastern slope of Forked Horn Butte. The City acquired irrigation water rights and transferred them to municipal use. During the irrigation season (April 15 - October 15), the COID canal supplied water to the City, which was processed through a conventional water filtration plant. During the winter months, the City pumped water directly from the Deschutes River into its distribution system. The finished water from the water filtration plant then entered an 18-inch steel main distribution line serving the 1 Weather Data at Redmond Roberts Field, Redmond, OR from the Weather Warehouse. Web Site: Viewed:

15 2. Water Supplier Description community. Over time, the City transitioned to a combined surface and groundwater supply and then eventually to the current exclusive groundwater supply. The City s surface water rights acquired from COID are currently leased instream and will eventually be used as mitigation for additional groundwater supply under the Deschutes Basin Groundwater Mitigation Program. Interconnections with Other Systems OAR (7) The City has one interconnection with South Redmond Heights (operated by Avion Water Company). With this interconnection, the City is capable of conveying water to Avion. This connection is not provided with plumbing that allows Avion to provide water back to the City. Additionally Avion s South Redmond Heights groundwater supply is not sufficient to provide water to the City. Intergovernmental Agreements OAR (1) The City has no existing exchange agreements, transfer or intergovernmental cooperation agreements with respect to water supply. Service Area Description and Population OAR (2) Exhibit 2-1 shows the City s current water delivery area, which includes the area within the existing City limits. As of 2011, the City provided water to 9,154 accounts. These accounts served residential, multi-family, and commercial customers. The City s estimated service area population in 2011 was 26,305, according to Portland State University population estimates. 2-2

16 2. Water Supplier Description EXHIBIT 2-1. City of Redmond Current and Future Service Area Map and System Schematic 2-3

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18 2. Water Supplier Description Records of Water Use OAR (4) and (9) Methodology The International Water Association and the American Water Works Association (AWWA) have published and promote a water audit method that is widely recognized and adopted throughout the water industry. 2 This method provides the definitions and classifications for annual water production and consumption shown in Exhibit 2-2. Determining the magnitude of each category can help a utility estimate the financial impact of production, billing, and leak detection practices. The City utilizes the AWWA method in this WMCP, as the period in review includes years when the current AMR system was not installed. Based on the current technology, future years water audits will be conducted either using the AWWA method or by simply balancing the total metered water (AMR) compared to total water produced. EXHIBIT 2-2. Components of the IWA/AWWA Water Balance, million gallons per year 3 A B C D E F G Water from Own Sources (corrected for known errors) System Input Volume = Demand Water Exported Water Supplied Authorized Consumption Billed Authorized Consumption Unbilled Authorized Consumption Billed metered consumption (including water exported to another system). Billed unmetered consumption. Unbilled metered consumption. Unbilled unmetered consumption. Revenue Water Nonrevenue Water Water Losses Apparent Losses Unauthorized consumption. Metering inaccuracies Data handling error Water Imported Real Losses Leakage on transmission and/or distribution Mains. Leakage and overflows at storage tanks. Leakage on service connections up to point of customer metering. System input, shown in Column B of Exhibit 2-2, refers to the total quantity of water delivered to a distribution system from all sources. The quantity of this water is generally measured using large master meters located at key entry points into the distribution system. System input is also known as demand. By definition the system input volume must equal the sum of the authorized consumption and water losses that occur in the system after accounting for changes in system storage (Column D of Exhibit 2-2). Authorized consumption is divided into billed and unbilled categories. Billed authorized consumption is equal to revenue water. Unbilled authorized consumption contributes to a 2 AWWA. Manual of Water Supply Practices M36. Water Audits and Loss Control Programs, Third Edition, A free Excel -based model of this method is available from 3 Ibid. Adapted from Figure 2-1 p

19 2. Water Supplier Description system s non-revenue water. Authorized consumption may be either metered or unmetered. Unmetered volumes must be estimated based on estimated flow rates and durations of flow. Examples of authorized, billed consumption include metered consumption for residential, commercial, industrial, irrigation, and wholesale water customers. Authorized unbilled consumption may include public uses for parks, public buildings and grounds, public works activities such as water line flushing and street cleaning, and for firefighting, or hydrant flushing. Water losses include both apparent losses, and real losses. Apparent losses result from meter inaccuracies, error introduced by data entry or manipulation, and unauthorized consumption (illegal connection to the system or use of a fire hydrant). Real losses result when water is lost because of leakage, reservoir overflow, and evaporation. All water systems have some degree of real losses. According to OWRD s administrative rules (OARs), if the annual water audit indicates that system leakage (water losses) exceeds 10 percent, a regularly scheduled and systematic program to detect leaks in the transmission and distribution system is required. In addition, if the municipal water supplier proposes to expand or initiate diversion of water under an extended permit for which resource issues have been identified, the water supplier must describe activities to reduce system leakage (water losses) to no more than 15 percent. Further, if the municipal water supplier serves a population greater than 7,500 and the water audit indicates that water losses are greater than 15 percent, the water supplier must implement and provide benchmarks for a system-wide leak repair or line replacement program to reduce water losses to 15 percent and if feasible and appropriate, to 10 percent. Generally, demand and consumption in municipal systems are expressed in units of million gallons per day (mgd). They may also be expressed in cubic feet per second (cfs) or gallons per minute (gpm). One mgd is equivalent to 1.55 cfs or 694 gpm. For annual or monthly values, a quantity of water is typically reported in million gallons (MG). Water use per person (per capita use) is expressed in gallons per person (per capita) per day (gpcd). The following terms are used to describe specific values of system demands: Average day demand (ADD) equals the total annual system input (demand) divided by 365 days. Maximum day demand (MDD) equals the highest system demand that occurs on any single day during a calendar year. It is also called the one-day MDD. Maximum monthly demand (MMD) in MG equals the highest total monthly demand of the 12 months of a calendar year. MMD in mgd equals the average day demand of the one month with the highest total demand of the 12 months of a calendar year. Peaking factors are the ratios of one demand value to another. The most common and important peaking factor is the ratio of the MDD to the ADD. MDD is an important value for water system planning. The supply facilities (treatment plants, pipelines, reservoirs) and water rights must be capable of meeting the MDD. If the MDD exceeds the combined supply capacity on any given day, finished water storage levels will be reduced. Consecutive days at or near the MDD will result in a water shortage. 2-6

20 2. Water Supplier Description Historical Water Demands Annual Demand Exhibit 2-3 summarizes demand, or production of groundwater at the wellheads, for the overall system by City customers. During the period , the City s annual volume produced averaged MG with the highest volume of MG in During the same period, the City s ADD ranged from 5.0 mgd to 5.6 mgd, and the average ADD was 5.2 mgd. The MDD ranged from 12.0 mgd to 13.7 mgd, and the average MDD was 13.1 mgd. The 3-day MDD, which gives an indication of the duration of periods of maximum demand, has ranged from 11.0 mgd to 12.7 mgd and averaged approximately 90.6 percent of the MDD. This means that if the MDD equals 14.0 mgd, the City can be expected to experience 3 consecutive days with an average demand of approximately 12.7 mgd each day (90.6 percent of 14 mgd). EXHIBIT 2-3. Average Day, Maximum Day, 3-day Maximum Day, Maximum Monthly Demands, and Peaking Factor, Year Annual Volume Produced (MG) ADD (mgd) MDD (mgd) 3-d MDD (mgd) 3-d MDD percentage of MDD (%) MMD (mgd) MMD (MG) Peaking Factor MDD:ADD Average Highest MDD is strongly influenced by weather patterns and the economy. Weather patterns often cause fluctuations in MDD from year to year. Weather patterns that influence MDD include: maximum temperatures, the number of consecutive days with high temperatures, when high temperatures occur in the summer, overall rainfall levels during the summer, and consecutive days without rainfall. Unusually hot and/or dry weather results in more outdoor irrigation, which increases the MDD. The economy can affect MDD, as well. Customers may choose to irrigate less to save in an economic downturn. The economy also influences the number of new homes with landscapes needing intense irrigation for plant establishment and the opening or closing of facilities that use water in their operations. 2-7

21 Demand (mgd) Annual Production (MG) 2. Water Supplier Description Exhibit 2-4 shows the City s annual production from 2006 to During this period, annual production initially increased from 2006 to 2007 and then decreased below the 2006 level. EXHIBIT 2-4. Annual Production (MG), Year Exhibit 2-5 shows the City s ADD and MDD for 2006 to During this period, ADD remained fairly steady. MDD increased markedly between 2006 and 2007 then fluctuated, demonstrating the influence of weather patterns on MDD. EXHIBIT 2-5. Average Day Demand (ADD) and Maximum Day Demand (MDD), ADD MDD Year 2-8

22 Peaking Factor (MDD:ADD) 2. Water Supplier Description Peaking Factors Peaking factors are the ratios of one demand value to another, and the most common and important peaking factor is the ratio of the MDD to the ADD. This ratio often is used for estimating peak demands when only ADDs are known or measured, as well as for hydraulic modeling of the system and for demand forecasting. From 2006 to 2011, the City s MDD to ADD peaking factor averaged 2.5 and ranged from 2.4 to 2.7, as shown in Exhibit 2-6. This value is typical value for Central Oregon water utilities, such as the City of Prineville (averaged 2.6 during ; City of Prineville 2011 WMCP) and the City of Bend (averaged 2.3 during ; City of Bend 2011 WMCP). EXHIBIT 2-6. Peaking Factors (MMD: ADD), Year 2-9

23 Monthly Average Day Demand (mgd) 2. Water Supplier Description Monthly Demand The City s MMD occurred in July each year from 2006 through 2010, and in August in The MMD average volume was MG and greatest volume was MG in Exhibit 2-7 shows monthly demand data from 2006 to 2011 expressed as an average daily demand for the month, with the peak season months of June through September in red. During this period, the highest monthly ADD recorded was 11.3 mgd in July This exhibit highlights the seasonal change in demand that the City experienced and the months with the greatest demand: July and August. Consequently, these months should be the focus of water conservation efforts. EXHIBIT 2-7. Monthly Average Day Demand (mgd), Red indicates peak season months (June through September) while blue indicates non-peak season months Date 2-10

24 Annual Average Seasonal Demand (mgd) Temperature ( F) 2. Water Supplier Description Seasonal Demand Exhibit 2-8 illustrates the summer period (defined as June through September) and winter period (December through March) ADDs and average temperatures for 2006 through As illustrated, the City s ADD is notably greater during the summer months, because of outdoor irrigation. From 2006 to 2011, Summer ADD ranged from 8.58 mgd to mgd and Winter ADD ranged from 2.04 mgd to 2.32 mgd. During this period, Winter ADD remained steady and Summer ADDs were relatively constant, except for Summer average temperatures ranged from 60.5 F in 2010 to 63.5 F in Winter average temperatures ranged from 32.1 F in 2008 to 37.3 F in EXHIBIT 2-8. Historical Seasonal Demand (mgd) and Seasonal Average Temperature ( F) at Roberts Field (Redmond Municipal Airport) 4, Winter = December to March. Summer = June to September Summer ADD Winter ADD Summer Average Temperature Winter Average Temperature Year 4 Temperature data source: Weather Warehouse. Web Site: Viewed:

25 2. Water Supplier Description Per Capita Demand Per capita demand, expressed in gallons per capita per day (gpcd), is the City s total demand from commercial and residential customers, divided by the estimated water delivery area population. Consequently, the calculated per capita demand values exceed the amounts of water actually used by a typical individual. In addition, per capita demand may not accurately portray year-to-year water use, because the calculation does not account for the difference in customer demographics, climate, rainfall, and current economic conditions. The calculation also does not account for specifics, such as changes in hotel occupancy or in large commercial uses, which may not have any relationship to population or actual efficiency of use. Nevertheless, per capita demands may show year-to-year trends and can be used to compare water use by the City s customers to that of other communities. Exhibit 2-9 shows the City s estimated average day per capita demands from 2006 to The water delivery area population estimates come from Portland State University s Population Research Center ( data: Population Estimates for Oregon and Its Counties and Incorporated Cities, March 2011; 2010 data: Revised and Certified July 1, 2010 Population Estimates, certified as of March 31, 2011; 2011 data: 2011 Annual Population Report Table, March 2012). EXHIBIT 2-9. Average Day Per Capita Demands (gpcd), Year ADD (mgd) Estimated Water Delivery Area Population ADD per Capita (gpcd) , , , , , , Average As shown in Exhibit 2-9, the City s average day per capita demand, averaged from 2006 to 2011, was gpcd. In comparison, the following average day per capita demands are from cities with similar climates: City of Bend 207 gpcd ( average, City of Bend 2011 WMCP), City of Prineville 170 gpcd ( average, City of Prineville 2011 WMCP), and City of Sisters gpcd ( average, City of Sisters 2011 WMCP). However, direct comparison of average day per capita demands between cities is not always appropriate given that some cities have unique circumstances that influence demand values. Authorized Consumption Authorized consumption is equal to the metered and certain unmetered water uses within the system. For the City of Redmond, all known authorized water consumption is metered. 2-12

26 Annual Metered Consumption (MG) 2. Water Supplier Description Customer Characteristics and Use Patterns OAR (6) The City has three primary customer classes: residential, multi-family, and commercial. Exhibit 2-10 shows the average number of customer accounts by customer category for 2006 through Residential accounts include single family dwellings that are individually metered. Multifamily includes apartment complexes, duplexes, town homes and mobile home parks. Most residential properties have lawns with underground irrigation systems. Commercial accounts include commercial facilities and City accounts. EXHIBIT City of Redmond Number of Accounts by Customer Category, Customer Category Single Family Residential Multi-family Residential Commercial Total The annual metered consumption by customer category for 2006 through 2011 is shown in Exhibit Multi-family and commercial use were relatively stable during this period while the single family residential category followed the same pattern as the overall demand, peaking in 2007 and 2008 and then falling off through EXHIBIT Metered Consumption by Customer Category, Single Family Residential Multi-family Residential Commercial Year 2-13

27 Jan-06 Jun-06 Nov-06 Apr-07 Sep-07 Feb-08 Jul-08 Dec-08 May-09 Oct-09 Mar-10 Aug-10 Jan-11 Jun-11 Nov-11 Monthly Metered Consumption (MG) 2. Water Supplier Description Exhibit 2-12 presents a pie chart illustrating the percentage of water used by each customer category in Single family residential water use represented 64 percent, multi-family residential water use represented 11 percent, and commercial water use represented 25 percent of total metered consumption. These percentages indicate that the water conservation opportunities may be greatest for single family residential users. EXHIBIT Percentage of Water Use by Consumption Category, 2011 Multi-family Residential 11% Commercial 25% Single Family Residential 64% Monthly Water Use Exhibit 2-13 shows the estimated monthly consumption by customer category for the years 2006 through Consumption increases in the summer months on an annual basis, which can likely be attributed to outdoor irrigation, and consumption has remained at similar levels across customer categories during 2006 to The highest monthly consumption was MG in August 2011 for single-family residential water users and 27.3 MG in September 2011 for multi-family residential water users. EXHIBIT Monthly Metered Consumption by Customer Category, Single Family Residential Multi-family Residential Commercial Month 2-14

28 Metered Consumption (MG/month) 2. Water Supplier Description Seasonal Water Use Exhibit 2-14 shows the average monthly consumption by season and customer category for For the purposes of this Plan, the summer months are defined as June through September and the winter months are defined as December through March. The ratio of the City s total summer season use to total winter season use was 4.2, which is similar to the City of Bend with 4.1 (City of Bend 2011 WMCP), but less than the City of Redmond s ratios for single family residential and commercial customer categories, with 4.6 and 4.3, respectively. This suggests that water conservation efforts targeting single family and commercial water uses in the summer season may produce notable water savings. EXHIBIT Seasonal Water Consumption by Customer Category, Single Family Residential Multi-family Residential Commercial 100 Total 50 0 Summer Season Average (June-Sept) Winter Season Average (Dec-Mar) Annual Average 2-15

29 2. Water Supplier Description Largest Water Users Exhibit 2-15 lists the City s top 15 water consumers. These customers were responsible for use of MG during the fiscal year (July 2010-June 2011). Water conservation efforts targeting these customers could result in significant water savings. EXHIBIT Top 15 Water Consumers, July 2010-June 2011 Facility Volume Used (MG) School 21.4 Multi-family complex 10.9 Industrial 10.1 Multi-family complex 9.9 Hospital 8.1 School 8.1 School 7.5 School 7.5 Multi-family complex 7.2 Retail 6.8 Multi-family complex 6.3 Multi-family complex 6.3 Multi-family complex 6.3 Creamery 6.0 Retail 5.4 Total Water Losses and Non-Revenue Water OAR (9) For the City of Redmond, non-revenue water (i.e. water losses or unaccounted for water) is the difference between the amount of groundwater pumped into the water system minus the amount of water measured through meters to customers. The causes for unaccounted for water may include: Meter inaccuracies Evaporation Reservoir overflows Unmetered usage System flushing Hydrant flow testing System leakage Theft 2-16

30 2. Water Supplier Description Exhibit 2-16 lists annual total production and total consumption and illustrates the non-revenue water quantity and percentage for the years The percent of non-revenue water has ranged from 9.2 percent to 12.8 percent from 2006 to The City s unaccounted for water was 9.3 percent in 2011; this is a decrease of 3.5 percent from 2007 and EXHIBIT Historical Non-Revenue Water Year Total Production (MG) Total Consumption (MG) Unaccounted for Water (MG) Unaccounted for Water (% ) City of Redmond Water Rights OAR (5) Exhibit 2-17 provides a description of the City s potable municipal water use authorizations and their status. The City s potable water supply comes from five water rights totaling cfs (12.8 mgd). The City also has one pending water use application (G-14908) for 25 cfs (16.2 mgd). A limited license (LL-1420) for the use of 9.7 cfs (5.1 mgd) is being used by the City as a bridge to the issuance of the permit for Application G In addition, Certificate 2016 authorizes use of 35 cfs (33 cfs for hydropower use and 2 cfs for municipal use) from the Deschutes River, which the City is not currently using for water supply. Exhibit 2-18 provides a description of the City s non-potable municipal water use authorizations and their status. Certificates 59048, 59049, and authorize water use from the City s Wastewater Treatment Plant. Certificate is for 1.18 cfs for irrigation use. 2-17

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32 2. Water Supplier Description EXHIBIT City of Redmond Water Rights for Potable Municipal Water Use Application Permit Transfer/ Permit Amendment Certificate Limited License Source Priority Date Type of Beneficial Use Period of Use Authorized Date for Completion Quantity (cfs) Quantity (mgd) Annual Volume (AF) Maximum Withdrawal To Date cfs Annually (MG)* 2011 Average Withdrawal Monthly (MG) Daily (mgd) Five-Year Average Withdrawal Monthly (MG) Comments For Potable Municipal Water Supply S-2231 S Deschutes River 4/22/1912 Municipal & Power year round N/A Water right issued for municipal and hydroelectric generation, for 35 cfs. Of the 35 cfs, 2 cfs is for municipal use. According to OWRD, the power claim (#244) has expired G G T Wells 1, 2, 4, 5, 6 & 7 in the Deschutes River Basin 11/25/1991 Municipal year round N/A G-6865 G-6793 T G-4981 G-4700 T G G T Wells 1, 2, 4 & 5 in the Deschutes Basin Wells 1, 2, 4, 5 & 6 in the Deschutes River Basin Wells 1, 2, 4, 5 & 6 in the Deschutes River Basin 3/27/1975 Municipal 9/5/1969 Municipal 9/25/1985 Municipal G-9462 G Well 3 11/7/1979 Municipal G LL-1420 Wells 6, 7, 8, 9, 10 & 11 in the Deschutes River Basin Wells 1, 2, 4, 5, 6, & 7 in the Deschutes River Basin 1/13/1999 Municipal N/A Municipal year round year round year round year round year round year round 10/1/2017 Not to exceed 3.3 cfs, being (in any combination) up to: 1.70 cfs from Well 1; 2.08 cfs from Well 2; 2.64 cfs from Well 4; and 3.30 cfs from Well /1/ /1/ N/A Valid Until 11/1/ Final Order issued 7/30/2012 (Vol. 88, P. 261) for T-11343; full beneficial use by 10/1/2017; adds Well 7 Final Order issued 7/30/2012 (Vol. 88, P. 251) for T-11342; full beneficial use by 10/1/2017; adds Well 7 Final Order issued 7/30/2012 (Vol. 88, P. 251) for T-11342; full beneficial use by 10/1/2017; adds Well 7 Final Order w/settlement Agreement issued; permit to be issued upon City providing mitigation obligation 2-19

33 2. Water Supplier Description EXHIBIT City of Redmond Water Rights for Non-Potable Municipal Water Use Application Permit Transfer/ Permit Amendment Certificate Limited License Source Priority Date Type of Beneficial Use Period of Use Authorized Date for Completion Quantity (cfs) Quantity (mgd) Annual Volume (AF) Comments City Held, Not Potable R R Redmond Municipal Sewage Treatment Plant 10/23/1980 Storage year round N/A N/A N/A S S S S G G Redmond Municipal Sewage Treatment Plant Sewage Effluent Storage Reservoir (Redmond Municipal Wastewater Treatment Plant) A well in Deschutes River Basin (DESC 55844) 3/21/1979 3/20/ /6/2006 Irrigation (141.8 ac) Supplemental Irrigation (141.8 ac) Irrigation (94.2 acres) Apr 1-Oct 31 Apr 1-Oct 31 Apr 1-Oct 31 N/A N/A N/A N/A N/A Limited to 1/40th of a cfs per acre and 4.0 acre-feet per acre Limited to 4.0 acre-feet per acre in combination with any other rights for the same lands; limited to deficiency in supply To irrigate Juniper Golf Course. Limited to 1/80th of a cfs per acre and 3.0 acrefeet per acre 2-20

34 2. Water Supplier Description In addition to the City-held water rights in Exhibits 2-17 and 2-18 above, the City has numerous water rights on Central Oregon Irrigation District s (COID) Certificate A large portion of these water rights are for municipal use and the remainder is for irrigation use. Currently, most of these water rights are leased instream, with COID and City of Redmond as co-lessors. A summary of the City water rights on COID s Certificate is in Exhibit EXHIBIT City of Redmond Instream Leases for Water Rights on COID s Certificate Use Acres Certificate Priority Date Comments Municipal Leased Instream Irrigation Leased Instream Irrigation In use /21/1900; 12/2/1907 Leased instream under IL-1203 (MP-166), IL-1230 IL-910, IL-1137, IL-1229, IL Irrigation IGA 76 with COID Note: Season 3 rate of diversion equals 1/32.4 th cfs per acre. Maximum annual volume is not to exceed 9.91 AF per acre. These rates and duty reflect allowance of a 45 percent transmission loss as determined by decree of the Circuit Court of Deschutes County. In addition to the water rights in Exhibits 2-17, 2-18, and 2-19, the City currently holds permanent mitigation credits and has credits in the queue under T (MP-126). These credits were developed through the Deschutes Water Alliance. Aquatic Resource Concerns The City s water right certificate 2016 (which is currently not used by the City for water supply) authorizes the use of surface water from the Deschutes River. The Upper Deschutes River is listed as a water quality limited stream according to the Oregon Department of Environmental Quality (DEQ). The following water quality impairments are designated in the Upper Deschutes River within the reach of the City s point of diversion (~River Mile 147.5) for water right certificate 2016: dissolved oxygen (January 1-May 15), flow modification, ph, and temperature (year around, non-spawning). The 303(d) listing information was obtained from: