Water Management and Conservation Plan

Transcription

1 Water Management and Conservation Plan Prepared for Kernville-Gleneden Beach-Lincoln Beach Water District January 2006 Prepared by

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6 Executive Summary Kernville-Gleneden Beach-Lincoln Beach Water District (District) submits this Water Management and Conservation Plan (WMCP) for review and approval by the Oregon Water Resources Department (OWRD). The District is a public community water system that supplies drinking water to approximately 5,000 residents on Oregon s Central Coast. This WMCP is being submitted pursuant to the Supplemental Settlement Agreement between the District, Lincoln City, the State Agencies and the Protestors executed September 8, The Supplemental Settlement Agreement includes by reference, a Settlement Agreement between the District, Lincoln City, OWRD and Oregon Department of Fish and Wildlife (ODFW) on August 27, For the purposes of this WMCP these two agreements are referred to as the Supplemental Settlement Agreement. Among other things, the Supplemental Settlement Agreement resolves the District s permit extensions and permit amendments for its permits S and S (superseded by permits S and S-54187, respectively). Under the Supplemental Settlement Agreement and associated Final Orders approving the District s permit extensions and permit amendments, the District may not divert any water under permit S-54187, and no more than 1.6 cubic feet per second (cfs) from permit S-54186, until the District receives a Final Order from OWRD approving a WMCP. This WMCP is also being submitted to meet the requirements of the District s water right permit S-54237, issued November 21, This WMCP satisfies the requirements of OAR Chapter 690, Division 86 adopted by the Water Resources Commission in November It includes each of the required elements under OAR and clearly articulates that, consistent with the Supplemental Settlement Agreeement, full beneficial use of permits S and S will occur over the next twenty years. This WMCP also presents planned water conservation programs for the District. These are a combination of existing programs that will be continued and new programs that the District plans to initiate. The plan is organized into the following sections, each addressing specific sections of OAR Chapter 690, Division 86: Section Requirement Section 1 Introduction OAR Section 2 - Water Supplier Description OAR Section 3 - Water Conservation OAR Section 4 Curtailment OAR Section 5 - Water Supply OAR CVO\ ES-1

7 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT Description of Municipal Water Supplier The District operates a public community water system (Public Water System Identification No ), supplying water to approximately 5,000 residents between Depoe Bay and Lincoln City. The District also supplies treated water to the Lower Siletz Water District (LSWD) as a wholesale customer. The District currently has a single source of supply, Drift Creek. The original point of diversion is located about three miles inland from the Pacific Ocean. Under the Supplemental Settlement Agreement, the District s permits were modified to provide an additional (downstream) point of diversion at Lincoln City s surface water diversion on Drift Creek. The District recently received permit S-54237, which provides for a limited backup supply from an unnamed tributary to Drift Creek. Water from Drift Creek is treated in the district s slow sand filtration plant and pumped to the North Reservoir. Water flows by gravity from this reservoir to most of the service area. A small portion is pumped to the upper elevations in the Salishan Hills development. Water Conservation Element Current Conservation Measures The District does not currently have an approved WMCP; however, the District has implemented a number of conservation measures in recent years: 1. Rates. The District revised its rate structure in September 1999 from a declining block to what is termed a flat rate structure, meaning that there is no volume discount. Prior to 1999, higher water use resulted in a lower unit cost. This was changed so that the unit rate charged for water does not decrease with higher use. The one exception from 1999 to 2003 was for those residential customers that used low amounts of water each month. A base rate was charged for the first 6,000 gallons of water use. In November 2003, the base quantity was lowered to 4,000 gallons per month. The current residential rate is a $12 base charge (which covers the initial 4,000 gallons of use) plus $3 per additional 1,000 gallons. For use at or above 4,000 gallons per month, this represents a flat rate of $3 per 1,000 gallons. 2. Public information. The District has included an information newsletter with each of its Consumer Confidence Reports for the past six years (issued from for the years ). The District has used these newsletters to update customers on the limited supply of water (particularly during drought years such as in 2001), and to remind users of conservation measures such as repairing leaky faucets, avoiding over-watering of outdoor plants, and limiting outdoor water use for cleaning sidewalks and driveways. 3. Conservation kits. The District has distributed, free of charge, 48 conservation kits to its customers. The kits contained a low-flow showerhead, two low-flow sink attachments, leak detection tablets, and pipe tape. It is unknown how many of these items were actually installed. ES-2 CVO\

8 EXEUTIVE SUMMARY 4. Water audit. The District s August 2000 Master Plan provided a summary audit for water use within the system. This audit has been further updated within this WMCP. As recommended in the Master Plan, the District is tracking annual average, maximum day, and per capita water use. The District is also tracking unaccounted-for water uses. 5. Leak detection and repair. The District has made finding and repairing leaks a high priority. For the three-year period from 1999 through 2001, District staff repaired 19 pipe leaks that were found in the system. 6. North Reservoir leak. The District hired an outside contractor to repair the joints in this concrete reservoir to prevent further leakage. This repair appears to have been 100 percent successful and saved as much as 100,000 gallons per day. The construction cost to the District was $16, Prevention of reservoir overflows. The District repaired the altitude valve for the South Reservoir and repaired the pressure switch for the Salishan Booster Pump Station. Both projects reduced the potential for inadvertent overflows to occur. 8. Pipe replacement. The District replaced a section of old and possibly leaking pipe on Laurel Street with a new pipeline. 9. Pressure reducing valve installation. Three 1½-inch bypass pressure reducing valves (PRVs) and surge valves were added, at a cost of $11,140, to reduce the number of pressure surges in the District. Pressure surges contribute to pipe leaks and failures. 10. Pressure reducing valve maintenance. In 2002 and 2003 the District rebuilt all of the PRVs that serve the lower elevation areas of the system. The repairs to these valves provide water savings by reducing the potential for pressure surges. 11. Master meter calibration. The District contracted with an outside firm to re-calibrate the master meter that records flows from the water treatment plant. 12. Meter installations. All new customers, as well as all existing customers, are metered. 13. Meter replacements (testing and maintenance). The District has replaced 360 old and possibly inaccurate customer meters with new or reconditioned meters. 14. Pipe looping. The District installed a section of new pipe through Gleneden Beach Park to provide a loop for two dead-end lines. This has reduced the need for flushing the two lines. In addition, the District responded to a low-flow water year in 2001 by enacting a curtailment plan. This action has been described in Section 4 of this WMCP. Summary of Ongoing and Proposed New Conservation Programs The District intends to implement either as a continuation of an existing program or as a new program the following conservation measures: 1. Rates. Continue using a rate structure that links the amount of water used to the amount billed, which encourages conservation. CVO\ ES-3

9 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT 2. Conservation kits or showerheads. Reinitiate the District s program to distribute either free or, for a nominal charge, conservation kits or showerheads. The conservation kits could be similar to the ones distributed in the past that included a low-flow showerhead, two low-flow sink filters, a toilet water attachment, leak detector tablets, and pipe tape. This is a low-cost program that has a favorable unit cost and as a public education tool reminds customers of the value of saving water. 3. Water audit. Continue to perform annual water audits that record annual average, maximum day, per capita water use, and unaccounted-for water rates. 4. Leak detection and repair. Hire an outside firm to perform a thorough and systematic leak detection survey. Repair all leaks that are identified. 5. Simplex AC pipe replacement. Budget for an average annual replacement of approximately 400 feet of the 9000 feet of Simplex AC pipe that exists in the system. The program may contribute to a lowering of the unaccounted-for water rate and it represents long-term investment in the District s infrastructure. 6. Pressure reducing valve maintenance. Inspect and calibrate PRVs annually and rebuild these valves every five years, to reduce pressure surges that contribute to leakage. 7. Master meter calibration. Continue with periodic calibration of the master meter at the water treatment plant. Check and recalibrate the meter every five years. Accurate metering is essential to reliable accounting of water use. 8. Meter installations. Continue to install meters for all new customers. 9. Meter replacements. Continue the program of replacing all 2-inch meters every fifteen years and replacing all residential meters with new or reconditioned meters. 10. Pipe looping. Continue to complete pipe loops to reduce flushing water requirements. 11. Public education. Implement a new program to hold a conservation open house once per year, or identify other avenues to regularly communicate with users on the topic of conservation. The District currently includes some conservation information in its annual newsletter. The proposed efforts in this area include further steps to encourage customers to conserve water. The analysis of public education suggests that it may not achieve a favorable unit value, but it is an important support mechanism for other conservation measures. 12. Low-flow toilet rebate program. Implement a program encouraging the use of low-flow toilets by providing a rebate to customers who purchase these fixtures for other than compliance with ORS (standards for fixtures). The low-flow toilet rebate program had the most favorable unit value of the potential conservation measures. 13. Large Commercial/Tourist-related facilities. Explore opportunities for water reuse with commercial and tourist facilities. Also explore partnership programs with commercial customers to share the cost of implementing conservation measures, such as replacing toilets with low-use models. ES-4 CVO\

10 EXEUTIVE SUMMARY Five-Year Benchmarks The District has provided a list of five-year conservation benchmarks under (4) and (6). The District s primary focus on conservation will be to reduce unaccounted-for water. The unaccounted-for water rate in 2004 was 17 percent. The average for 1999 through 2004 was 21 percent. These rates exceed acceptable industry standards and are an area of concern for the District. Therefore, the District s highest priority benchmarks are related to reducing the percentage of unaccounted-for water. Over the next five years, within available resources, the District will strive to reduce the unaccounted-for water rate to 10 percent or less by To achieve this reduction the District plans to: Implement a system-wide leak detection and repair program that includes contracting with an outside firm to perform leak detection of all pipelines by Replace (on average) 400 feet of the Simplex AC pipe each year from 2005 through Improve the accuracy of the District s water audits by continuing to calibrate the master meter at the water treatment plant every three to five years. Improve the accuracy of the District s water audits by continuing the program to replace or refurbish all 2-inch and larger meters every fifteen years. Track water production and consumption and calculate unaccounted-for water on a monthly basis. Five-Year Benchmarks for Proposed New Conservation Programs The following conservation measures will be implemented over the next five years: Initiate a low-flow toilet rebate program. Target large commercial/tourist-related facilities Reinitiate the District s program to distribute conservation kits or low-flow showerheads. Explore opportunities for water reuse with large commercial/tourist-related facilities. Water Curtailment Element The proposed curtailment plan presented in this WMCP has four stages, each of which is initiated by one or more events. The four stages, increasing in order of severity, are: 1. Water Alert Status 2. Serious Water Shortage Status 3. Critical Water Shortage Status 4. Emergency Water Shortage Status CVO\ ES-5

11 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT These four proposed curtailment stages are summarized in Exhibit ES-1. The initiating conditions and response actions are described in detail in Section 4 of this WMCP. EXHIBIT ES-1 The District Curtailment Stages Potential Program for District s Consideration Stage Initiating Conditions Actions 1. Water Alert Drought conditions in Lincoln County Request voluntary water use reduction by bill inserts 2. Serious Shortage Low Drift Creek flows Mandatory odd/even watering; mandatory restrictions on nonessential uses 3. Critical Shortage Drift Creek flows are low enough to physically or legally limit withdrawals 4. Emergency System failure main break, treatment plant interruption, spill into river Mandatory restrictions on watering in addition to limiting nonessential uses Immediate notification of customers for contamination; implementation of Stage 2 or 3 measures if emergency will result in supply shortage Water Supply Element The per capita method was used to project the District s demands. This method assumes a) per capita use will remain unchanged compared to recent years, and b) the mix of commercial versus residential water use will remain unchanged compared to recent years. The District will periodically monitor both factors to determine their validity. The river withdrawal rate varies throughout the day and may exceed the daily demand by up to 50 percent. This 50 percent differential was the approximate differential between the maximum daily demand (MDD) use in 1997 and the claim of beneficial use value of 1.03 million gallons per day (mgd) that was requested for that year. Therefore, for projecting future use against the District s water rights, a factor of 1.5 is applied to the MDD. Based on the available records, the following values were used to project future demands: 2004 service population = 5,199 Annual growth rate = 2.0 percent Per capita average day demand (ADD) = 97 gallons per capital per day (gpcd) MDD to ADD ratio = 1.9 Source withdrawals = 1.5 x MDD Using these criteria, per capita demand projections indicate that by 2025, at the end of the twenty-year planning horizon, the District s demands are projected to equal 0.76 mgd for average day demand (ADD) and 1.45 mgd for MDD. Furthermore, the maximum projected river withdrawal will be 2.2 mgd (3.4 cfs). Projections also indicate that the District may grow to its buildout service population of 8,125 by At that time, the ADD will equal ES-6 CVO\

12 EXEUTIVE SUMMARY 0.80 mgd and the MDD will equal 1.5 mgd. The maximum projected river withdrawal will be 2.3 mgd (3.5 cfs). The sum of the District s two water right permits from Drift Creek is 7.0 cfs: 3.0 cfs under permit S-54186, and 4.0 cfs under permit S Under the Supplemental Settlement Agreement and an Intergovernmental Agreement between the District and Lincoln City, 1.5 cfs of permit S has been assigned to Lincoln City (Purchased Water Right), 1.6 cfs of permit S is currently being beneficially used by the District, 1.5 cfs of permit S or S shall be available to Lincoln City for emergency use (Emergency Use Right), and the remaining 2.4 cfs is to be cooperatively developed and perfected by the District and Lincoln City for instream benefits, the District s future needs, and emergency back-up supply for Lincoln City. Therefore, in addition to the District s specific projected need for 3.4 cfs by 2025 described above, the District, in cooperation with Lincoln City and consistent with the Supplemental Settlement Agreement, plans to divert and beneficially use all 7.0 cfs of extended permits S and S over the next twenty years. Resource Issues Drift Creek supports threatened and endangered species, including steelhead and salmon. Under the provisions of the Supplemental Settlement Agreement, the OWRD final orders conclude that the proposed use of the undeveloped portion of permits S and S complies with ORS with respect to maintaining the persistence of listed fish species. List of Affected Local Governments This plan may affect the following local governmental agencies: Lincoln City Depoe Bay Lincoln County Confederated Tribes of the Siletz Indians Lower Siletz Water District Thirty days prior to submitting this plan to OWRD, each affected governmental agency was invited to review this plan and provide comments relating to its consistency with their comprehensive land use plans. The letters requesting this input and the responses provided are in Appendix A. Plan Update Schedule The District anticipates submitting an update of this plan within ten years, or by January As required by OAR Chapter 690, Division 86, a progress report will be submitted in five years, or by January CVO\ ES-7

13 SECTION 1 Introduction OAR System Overview The Kernville-Gleneden Beach-Lincoln Beach Water District (District) operates a public community water system (Public Water System Identification No ), supplying water to approximately 5,000 residents between Depoe Bay and Lincoln City. The District also supplies treated water to the Lower Siletz Water District (LSWD) as a wholesale customer. The District currently has a single source of supply, Drift Creek. The original point of diversion is located about 3 miles inland from the Pacific Ocean. Under the Supplemental Settlement Agreement between the District, Lincoln City, the State Agencies and the Protestors, the District s permits were modified to provide an additional (downstream) point of diversion at Lincoln City s surface water diversion on Drift Creek. The District recently received a water right permit (permit S-54237) for a limited backup supply from an unnamed tributary to Drift Creek. Water from Drift Creek is treated in the District s slow sand filtration plant and then pumped to the North Reservoir. Water flows by gravity from this reservoir to most of the service area. A small portion is pumped to the upper elevations in Salishan Hills development. Plan Organization This Water Management and Conservation Plan (WMCP) fulfills the requirements of the Oregon Administrative Rules developed by the Water Resources Department (OAR Chapter 690, Division 86). It describes water conservation and curtailment programs to guide planning and operation of the District s system. The plan is organized into the following sections, each addressing specific sections of OAR : CVO\

14 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT Section Requirement Section 1 Introduction OAR Section 2 - Water Supplier Description OAR Section 3 - Water Conservation OAR Section 4 Curtailment OAR Section 5 - Water Supply OAR Affected Local Governments In addition to the District, the WMCP may affect the following local governmental agencies: Lincoln City Depoe Bay Lower Siletz Water District Confederated Tribes of the Siletz Indians Lincoln County Thirty days prior to submitting this plan to OWRD, the plan was made 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 this input and the input provided are in Appendix A. Plan Update Schedule The District anticipates submitting an update of this plan within 10 years, or by January As required by the Commission s rules, a progress report will be submitted in five years, or by January Time Extension No extension of time to implement metering is required or requested. 1-2 CVO\

15 SECTION 2 Water Supplier Description This section satisfies the requirements of OAR Source (1) Currently, the District obtains all of its water from Drift Creek. Water is collected through an infiltration gallery system underneath the streambed and from a screened, direct surface intake. The District recently received a water right permit for a second source of water to be used during storm events only (permit S-54237). This source is an unnamed tributary of Drift Creek, which enters Drift Creek a few hundred feet downstream of the District s existing point of diversion on Drift Creek. The granting of this permit does not increase the District s total quantity of water rights, and is conditioned so that its use is allowed only in lieu of the District s other rights during high turbidity events on Drift Creek. All water withdrawn from the unnamed tributary will be treated in the existing slow sand filter plant and pumped from there to the North Reservoir. Interconnections with Other Systems (7) The District serves water to and is the only supply source for the Lower Siletz Water District (LSWD), which is Public Water System Identification No The two systems are connected through a 6-inch main in one location. The District plans to install a finished water interconnection with Lincoln City to allow for mutual emergency backup, but no such interconnection exists at this time. Intergovernmental Agreements (1) The District signed an intergovernmental agreement with Lincoln City on July 12, 2001 (Appendix B). Among other things, the Intergovernmental Agreement authorizes the sale of 1.5 cfs of the District s water rights from permit S to Lincoln City, establishes an emergency back-up supply for Lincoln City of up to 1.5 cfs from permit S or S-54187, and establishes a cooperative arrangement to make full beneficial use of permits S and S The assignment and numerous water right transactions needed to move the Intergovernmental Agreement forward were approved in the Supplemental Settlement Agreement executed September 8, 2005 (Appendix C). The District has no other intergovernmental agreements in force. CVO\

16 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT Service Area Description (2) A service area map is enclosed with this WMCP. Exhibit 2-1 provides service population estimates for 1999 through The service population includes the customers in the LSWD, which are served by the District. As of 2004, the District served a population of approximately 5,199. The rate of population growth for 1999 through 2004 averaged 3.0 percent. The LSWD currently serves about 210 people through 159 service connections. EXHIBIT 2-1 Service Population Estimates for the District for Calendar Year Residential Connections Estimated Service Population Annual Growth Rate ,920 4, ,936 4, % ,972 4, % ,984 4, % ,014 4, % ,222 5, % Note: Service population estimated by District staff, based on number of residential connections and year 2000 census data. Records of Water Use (4) and (9) Production (Demands) Production refers to the quantity of water delivered to the distribution system. In the case of the District s system, production equals the amount of water pumped to the North Reservoir from the high service pumps at the water treatment plant. By definition, production equals system demand. Demand is all the water used within the system, from the North Reservoir to the customers. Demand is the sum of metered consumption (residential, commercial, public, and industrial), public uses (fire fighting, hydrant flushing, other), water lost to leakage, reservoir overflow, and evaporation. Exhibit 2-2 summarizes demand records for the District for the period of 1994 through Exhibit 2-3 displays these data on a chart with the trend lines shown. 2-2 CVO\

17 2. WATER SUPPLIER DESCRIPTION EXHIBIT 2-2 Demand Records for The District for Average Day Calendar Year Demand (mgd) Maximum Day Demand (mgd) Maximum Month Demand (mg) Ratio of Maximum Day to Average Day EXHIBIT 2-3 Average and Maximum Day Demand Records Trendline: MDD = 0.015(year) Demand (mgd) Trendline: ADD = (year) CVO\

18 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT The average day demand (ADD) has remained relatively constant from 1994 through 2004, if the value for 1998 is disregarded as an anomaly. The ADD has ranged from 0.41 to 0.49 mgd, but the slope for the trend line is flat (nearly equal to zero). The high value for 1998, 0.68 mgd, reflects the higher rate of unaccounted for water that occurred during that year because of a major leak in the North Reservoir. This is discussed in a later section in this chapter. Not including the anomalous value in 1998, the ADD has averaged 0.45 million gallons per day (mgd) for the period of Of the District s total ADD, the LSWD s portion for 2004 was approximately 16,000 gpd (0.016 mgd). This represents approximately 4 percent of the District s overall ADD for The consistent values for ADD are reflected in the average per capita demands, shown in Exhibit 2-4. If the value for 1998 is ignored, the average per capita demand has trended downward as the service population grows, but the ADD has been more constant. The per capita ADD averaged 97 gallons per capita per day (gpcd) for the years EXHIBIT 2-4 Average Day and Average Per Capita Demands Average Day Demand (mgd) Average Day Demand Avg Per Capita Demand Average Per Capita Demand (gpcd) The maximum day demands (MDDs) are also displayed on Exhibit 2-3. The maximum day demand is the highest system demand that occurs on any single day during a calendar year. For the District s system, the MDD results from both dryer, warmer weather, and from higher tourist use in the summer. MDD values were only available for 1999 through These values range from 0.80 to 0.90 mgd and show a slight increasing trend. It is unknown how much this trend is skewed by having fewer years of record. Exhibit 2-2 includes a column showing the MDD to ADD ratio. This has ranged from 1.6 to 2.1, with an average of 1.9, for the years CVO\

19 2. WATER SUPPLIER DESCRIPTION The MDD for the LSWD in 2004 was 30,400 gpd (0.030 mgd). This represents about 4 percent of the District s overall MDD for Consumption and Unaccounted For Water Consumption values are based on metered water use within the system. All customers are metered, and the total of the metered amounts is the system consumption. The difference between production and consumption divided by production equals the unaccounted for water rate. Unaccounted for water results from meter inaccuracies (both master and customer meters), unmetered uses such as from hydrants, and water lost to leakage, reservoir overflow, or evaporation. Exhibit 2-5 lists production, consumption, and unaccounted for water rates for 1998 through EXHIBIT 2-5 Production, Consumption, and Unaccounted For Water for 1998 through 2004 Calendar Year Production (mg) Metered Consumption (mg) Unaccounted For Water Rate % % % % % % % Exhibit 2-6 displays the annual unaccounted for water rate for the years 1998 through Apart from the high unaccounted for water rate for 1998, the rate has decreased in recent years as illustrated by the negatively sloping trendline in Exhibit 2-6. The values for have fluctuated between 16 and 27 percent with an average of 21 percent. CVO\

20 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT EXHIBIT 2-6 Annual Unaccounted-For Water Rates 50% 45% Unaccounted for Water Percentage 40% 35% 30% 25% 20% 15% 10% Trendline for % Unaccounted for Water = -0.13(year) % 0% The District achieved the significant reduction in unaccounted for water from 1998 to 1999 by repairing a leak in the North Reservoir. This one leak was approximately 100,000 gallons per day. Even with resolving this major leak, the District s unaccounted for water rate has continued at a higher than desired rate, averaging 17 percent in An average rate of 17 percent is equivalent to not accounting for 70,000 gpd. The District has been more aggressive in identifying leaks and repairing them since In July of 2004, a leaking valve on a dead-end section of pipeline was located, and the 12-inch valves on the north and south side of the line were replaced. This valve replacement reduced unaccounted for water significantly, but the rate since valve replacement has averaged 12 percent, still above the 10 percent goal recommended by OWRD. Additional small leaks in the system and meter errors may account for the persistent rate of unaccounted for water The District has been and will continue to implement programs to reduce this rate as explained in Section 3 of this Water Management and Conservation Plan. Because the rate is higher than desired, the District will explore the following: 1. Checking for illegal connections, especially during the summer irrigation and tourist season. These connections may be masking measured consumption but driving production numbers up. 2. Conducting a full-scale water audit to determine if the system losses are paper losses or actual losses. 3. Performing a system-wide leak detection survey, followed by leak repairs. 2-6 CVO\

21 2. WATER SUPPLIER DESCRIPTION Exhibit 2-7 displays the unaccounted for water rates by months for January 1998 through September In part, the month to month variability is a function of the timing of the monthly meter readings. Meters are read over the period of a few days, and so the totals do not exactly correspond with the date of obtaining the master meter reading. The data for 2002 through 2005 show a pattern of lower values through the summer and higher values during fall through spring. This trend may be the result of relatively constant leakage rates throughout the year, which become a smaller percentage of total water demands during the summer. A second explanation may be that customer meters provide more accurate readings at higher flows. EXHIBIT 2-7 Monthly Unaccounted-For Water Rates 60% 50% Unaccounted for Water (%) 40% 30% 20% Trendline (excluding 1998 data) 10% 0% Jan-98 Jul-98 Jan-99 Jul-99 Jan-00 Jul-00 Jan-01 Jul-01 Jan-02 Jul-02 Jan-03 Jul-03 Jan-04 Jul-04 Jan-05 Customer Characteristics and Use Patterns (6) Exhibit 2-8 presents a description of the customers served including type of customer, number of connections, and quantity of water used. CVO\

22 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT EXHIBIT 2-8 Customer Description for 2002 Customer Type Number of Connections Percent of Connections Metered Consumption (mg) Average Daily Metered Consumption (mgd) Percent of Metered Consumption Residential % 73,014, % Small Commercial Large Commercial 77 4% 7,028, % 58 3% 48,623, % Total % 128,665, % Small commercial accounts are defined as non-residential accounts that use a ¾-inch or smaller meter. These would include businesses such as real estate offices, stores, and some restaurants. Large commercial accounts are those serving residential and non-residential customers that use a meter larger than ¾-inch. Large commercial accounts include the following: Customer Name Type of Facility Number of 2-inch and larger meters Fogarty Creek State Park State park 1 Gleneden Beach Fire Station Fire station 1 Gleneden Beach State Park State park 1 Willark Trailer RV Park RV park 1 Sea & Sand RV Park RV park 1 Holiday Hills RV Park RV park 1 Fogarty Creek RV Park RV park 1 Ember Forest RV park 1 Reginas Place Apartments Apartments 1 Worldmark Time-share resort 5 Cavalier Condos Condominiums 1 Searidge Resort homes 12 Surfrider Hotel and Restaurant Hotel and restaurant 2 Lower Siletz Water District Wholesale customer 2 Total CVO\

23 2. WATER SUPPLIER DESCRIPTION As shown in Exhibit 2-8, residential customers accounted for 94 percent of the connections and 57 percent of the metered consumption in The system had a similar number of small and large commercial connections, but the large connections accounted for 38 percent of the metered consumption whereas the small commercial connections accounted for only 5 percent. Exhibits 2-9 and 2-10 graphically display consumption by customer type for 2002 according to month. The percentage of use for each customer category (residential, small commercial, and large commercial) remain relatively constant throughout the year. The percentage of use by residential customers rose slightly from July through October, but only by about 5 percent compared to the average for the remainder of the year. Exhibit 2-9 illustrates the dry season increase in water use that occurs during July, August, and September. For the year 2002, the monthly average for these three months was equal to 15 million gallons. The monthly average for the remaining months during this year was 9.4 million gallons. The monthly average for the dry season months is approximately 1.6 times the monthly average for the wet months. A dry to wet season monthly increase of 1.6 times is relatively low compared to Willamette Valley water utilities. Furthermore, the increased water consumption during the dry months is only partially because of outdoor irrigation use. A significant portion of this increase is caused by higher motel, rental, and vacation home occupancies during the summer months. CVO\

24 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT EXHIBIT 2-9 Monthly Metered Use by Customer Category for 2002 (gallons) 18,000,000 16,000,000 14,000,000 Metered Use (gallons) 12,000,000 10,000,000 8,000,000 6,000,000 4,000,000 2,000,000 0 Residential Large Commercial Small Commercial Jan-02 Feb-02 Mar-02 Apr-02 May-02 Jun-02 Jul-02 Aug-02 Sep-02 Oct-02 Nov-02 Dec-02 EXHIBIT 2-10 Monthly Metered Use by Customer Category for 2002 (percent) 100% Percentage of Total Metered Use 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Residential Large Commercial Small Commercial Jan-02 Feb-02 Mar-02 Apr-02 May-02 Jun-02 Jul-02 Aug-02 Sep-02 Oct-02 Nov-02 Dec CVO\

25 2. WATER SUPPLIER DESCRIPTION The District does not currently have a means for specifically tracking the contribution by irrigation and the contribution by tourism to the summer increase. However, some information is available from the District s analysis of residential water use as part of the rate revision implemented in In 2002, 17 percent of the residential customers used more than 3,500 gallons per month during the winter months, and 46 percent used more than 3,500 gallons in the summer months. These data show that about half of the residential customers (at least 29 percent, equal to percent) are increasing their water use during the summer months to a level that suggests some outdoor irrigation. The other half, 54 percent, used less than 3,500 gallons per month even during the summer, which suggests a relatively low amount of outdoor irrigation. These data are inconclusive, but suggest that outdoor irrigation accounts for some but not all of the summertime demand increase. If outdoor irrigation only partially accounts for the summertime demand increase, then conservation measures directed toward reducing outdoor irrigation will have only limited value for the District as compared to water providers in the Willamette Valley or East of the Cascade Range. Therefore, the District will focus on conservation measures that address year-round water use and use by tourist facilities, such as hotels and restaurants. Moreover, the District intends to conduct analyses to further determine the contribution of outdoor irrigation and increased tourism to the summertime peak demands. An understanding of these demand peaks will enable the District to better focus its conservation efforts. Exhibits 2-11 and 2-12 further illustrate this conclusion. Exhibit 2-11 shows average residential use during the winter season (October-June) and summer season (July- September) for the year These values are based on metered consumption records for the residential accounts. The winter season average was 87 gpd per customer and the summer season average was 144 gpd per customer. The annual average was 101 gpd per customer. If it is assumed that all use during the winter months is for indoor purposes (or at least excludes outdoor irrigation), then the increase for the summer months is caused by outdoor irrigation and increased occupancy of summer homes. As shown in Exhibit 2-12, this outdoor/tourism component is about 5,000 gallons per year per residential customer, compared to the indoor component of 32,000 gallons per year. Indoor use is approximately 87 percent of total water use. This further suggests that the District should target conservation measures that address year-around (indoor) water use as compared to outdoor summer irrigation use. CVO\

26 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT EXHIBIT 2-11 Exhibit Average Residential Consumption Average by Season Residential Consumption by Season 160 Water Use (gpd per residential customer) Winter Season Average (Oct- June) Summer Season Average (July- Sep) Annual Average EXHIBIT 2-12 Exhibit Annual Water Use Annual per Residential Water Use Customer per Residential (2002) Customer (2002) 40,000 Water Use (gallons per year per residential customer) 35,000 30,000 25,000 20,000 15,000 10,000 5,000 0 Indoor Use Outdoor/Tourism Use Total Use 2-12 CVO\

27 2. WATER SUPPLIER DESCRIPTION District Water Rights (5) The District holds two municipal use water right permits on Drift Creek. Exhibit 2-13 provides a description of these rights and their status. On behalf of the District, CH2M HILL filed a claim of beneficial use in February 2000 for a portion of the older (1963) right, permit S Through the Supplemental Settlement Agreement, among other things, both permits were extended to the year 2020 and both permits were modified to include an additional point of diversion at Lincoln City s point of diversion on Drift Creek. The District also has a water right permit for the use of a small, unnamed tributary of Drift Creek that enters Drift Creek about 500 feet below the District s intake. As conditioned, this permit (S-54237) limits use to times when water cannot be diverted under existing permits S and S because of unacceptable turbidity levels on Drift Creek, limits the season of use to October 15 through May 15 of each year, limits the amount of water under the new permit to the amount by which use under permits S and S is reduced because of the high turbidity event, and requires a minimum by-pass flow of 1.0 cfs on the unnamed tributary stream. Based on limited field measurements made by District staff in 2000, the winter flow of this unnamed tributary is estimated as 2-5 cfs ( mgd). During the summer months, its flow drops below 0.5 cfs (0.3 mgd). The District s interest in obtaining a water right on this creek was based solely on water quality, not on increasing available water quantity. Turbidities in this small creek averaged between 1-5 NTU during the winter of 1999/2000, compared to an average of NTU on Drift Creek. Therefore, the use of the small, side creek provides improved raw water quality and longer filter runs (between filter cleanings) than using Drift Creek during storm periods. However, this may not be the case in all years, as the quality of water in each source depends on watershed conditions. At a minimum, permit S will provide greater flexibility for operating the District s system. CVO\

28 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT EXHIBIT 2-13 Kernville-Gleneden Beach-Lincoln Beach Water District Water Rights Source Priority Date Permit No. Quantity (cfs) Quantity (mgd) Status Drift Creek December A claim of beneficial use for 1.60 cfs (1.03 mgd) was submitted to WRD in February This right has been extended until Under the permit extension, the District may not divert more than 1.6 cfs until OWRD issues a final order approving the District s WMCP Drift Creek April This right has been extended until Under the permit extension, the District may not divert any water under this permit until OWRD issues a final order approving the District s WMCP. Unnamed tributary to Drift Creek April The purpose of this permit is to substitute for other rights during high turbidities in the winter. It does not increase the District s total quantity of water rights. With respect to streamflow-dependant listed species, Drift Creek supports Coho salmon, Chinook salmon, steelhead trout, cutthroat trout, and lamprey. Under the OWRD s final orders approving time extensions for permit S and S-54187, the undeveloped portions of the permits meet the requirements of ORS in terms of maintaining the persistence of listed fish species. Drift Creek, from river mile 0.8 to 21.6 is listed as water quality limited by the Oregon Department of Environmental Quality. The parameter for listing is summer temperature. Evaluation of Water Rights/Supply (3) The District operates water supply facilities consisting of an infiltration gallery and a direct surface intake on Drift Creek. In addition, the District has a storm-event backup water right permit on an unnamed tributary of Drift Creek (permit S-54237). This right, however, can only be used in lieu of the District s existing rights. It will not increase the total quantity of water that the District can withdraw. The current system capacity is limited by the production capacity of the water treatment plant which is rated at 1.2 mgd. The maximum production to date for beneficial use was 1.03 mgd. The District can expand the intake, water treatment plant, and high service pumping to greater than 1.2 mgd as demands warrant. The reliability of the District s permits is related to their relative seniority. A listing of all water rights with a priority date of April 1970 or earlier was obtained from OWRD. There are three senior water rights of significance in the basin. Lincoln City holds two water rights on Gordey Creek, a tributary to Drift Creek. Both are for 0.50 cfs. One has a priority date of November 1940 and the other a date of June These senior rights however should not 2-14 CVO\

29 2. WATER SUPPLIER DESCRIPTION limit the District s withdrawals because Gordey Creek is a different water source and it enters Drift Creek downstream of the District s original point of diversion. Although Lincoln City is adding a site on Drift Creek as an additional point of diversion for its Gordey Creek water rights (certificates and 22260), such a transfer will limit the amount of water diverted from Drift Creek to that amount available at the authorized point of diversion on Gordey Creek (See transfer T-9305). The third water right, senior to the District s permit S-54187, is an instream right held by OWRD, with a priority date of July 1966 (Instream Water Right Certificate 59728). The OWRD instream water right is to maintain stream flow at a minimum of 22 cfs in the summer (July 16 through October 15) and 100 cfs in the winter (November 1 through May 31). However, the instream water right contains the following condition, This instream water right shall not affect domestic or livestock uses, waters to be legally stored or legally released from storage or 4.0 CUBIC FOOT PER SECOND RESERVED FOR MUNICIPAL PURPOSES, (emphasis added) e.g. the District s permit S The most significant potential limitation to the District s water rights is associated with the by-pass flow stipulations in the Supplemental Settlement Agreement and associated water right transactions. The Agreement and the numerous associated water right transactions limit the District s ability to lawfully divert more than 1.6 cfs between July 1 through October 15 of each year when average daily flows in Drift Creek are at or below 11 cfs, measured at a point approximately 250 feet downstream from the Lincoln City diversion on Drift Creek. The Agreement and associated water right transactions provides for up to five days of diversion above 1.6 cfs so long as flows at the measurement location do not drop below 7.0 cfs during this time period. Limited streamflow data exist near the measurement location described in the Supplemental Settlement Agreement. These data come from an OWRD gage station operated between 1964 and 1965, U.S. Geological Survey (USGS) measurements at the OWRD gage between 1965 and 1967, a Lincoln City gage operated since November 2000 and periodic measurements by the Yachats Watershed monitoring group and Lincoln City. With the exception of an anomalous and possibly erroneous USGS measurement of 13.8 cfs in August 1966, low flows near the measurement location in the Supplemental Settlement Agreement range from 18.1 to 28.3 cfs, well above the 11.0 cfs limitation. Therefore, based on existing data, the District s water rights are secure and reliable. The District s August 2000 Master Plan suggests that the current water rights from Drift Creek are adequate to meet the projected needs through The master plan notes that it is important for the District to obtain a secondary supply to provide greater reliability, even if the existing supply is adequate. The current negotiations with Lincoln City include a provision that would provide the District a secondary supply through an interconnection with Lincoln City s system. Lincoln City obtains its water supply from Schooner Creek. CVO\

30 KERNVILLE-GLENEDEN BEACH-LINCOLN BEACH WATER DISTRICT System Description (8) Exhibit 2-14 presents a schematic of the source, treatment, and distribution facilities for the District. After being withdrawn from Drift Creek, water is pumped by low-lift pumps to the slow sand filtration plant located just a short distance from the creek. Filtered water is chlorinated and then pumped to the North Reservoir. From this reservoir, water flows by gravity to the majority of the system. EXHIBIT 2-14 Water District System Schematic 2-16 CVO\

31 2. WATER SUPPLIER DESCRIPTION Exhibits 2-15 through 2-17 present inventories for the system reservoirs, pump stations, and pipelines. EXHIBIT 2-15 System Reservoir Inventory Name Volume (gallons) Overflow Elevation (feet) Material North 300, Concrete, with metal roof Salishan Standpipe 150, Steel Central 1,000, Steel South 1,000, Steel EXHIBIT 2-16 System Pump Station Inventory Name Number of Pumps Total Capacity (gpm) Intake Water treatment plant 3 1,200 Salishan Hills 2 1,400 Note: The District will typically run one water treatment plant pump at a time during the winter months, and two during the summer months. EXHIBIT 2-17 System Pipe Inventory (by diameter) Pipe Material 2-inch 4-inch 6-inch 8-inch 10-inch 12-inch Total Asbestos cement (Simplex brand) Asbestos cement (other) 0 0 8, , ,060 38,600 21,450 26,700 14, ,500 PVC 1,170 1,030 14,780 17, ,770 ABS 3, ,740 Stainless steel Total 4,920 11,080 62,140 38,460 27,480 15, ,430 CVO\

32 SECTION 3 Water Conservation This section addresses the requirements of OAR (1) (6). Current Conservation Measures (1) and (3) The District does not have a previously approved Water Management and Conservation Plan (WMCP). The District has, however, implemented a number of conservation measures in recent years: 1. Rates. The District revised its rate structure in September 1999 from a declining block to what is termed a flat rate structure, meaning there is no volume discount. Prior to 1999, higher water use resulted in a lower unit cost. This was changed so that the unit rate charged for water does not decrease with higher use. The one exception from 1999 to 2003 was for those residential customers that used low amounts of water each month. A base rate was charged for the first 6,000 gallons of water use. In November 2003, the base quantity was lowered to 4,000 gallons per month. The current residential rate is a $12 base charge which covers the initial 4,000 gallons of use. For use at or above 4,000 gallons per month, there is a fee of $3 per 1,000 gallons. 2. Public information. The District has included an information newsletter with each of its Consumer Confidence Reports for the past six years (issued from for the years ). The District has used these newsletters to update customers on the limited supply of water (particularly during drought years such as in 2001), and to remind users of conservation measures such as repairing leaky faucets, avoiding over-watering of outdoor plants, and limiting outdoor water use for cleaning sidewalks and driveways. 3. Conservation kits. The District has distributed, free of charge, 48 conservation kits to their customers. The kits contained a low flow showerhead, two low flow sink attachments, leak detection tablets, and pipe tape. It is unknown how many of these items were actually installed. 4. Water audit. The District s August 2000 Master Plan provided a summary audit for water use within the system. This audit has been further updated within this WMCP. As recommended in the Master Plan, the District is tracking annual average, maximum day, and per capita water use. The District is also tracking unaccounted-for water uses. 5. Leak detection and repair. The District s field staff has made locating and repairing pipe leaks a high priority. During the 3-year period from 1999 through 2001, District staff repaired 19 pipe leaks that were found in the system. In July 2004, after locating a leaking valve on a dead-end section of pipeline, the 12 inch valves on the north and south side of the line were replaced at a cost of $4,964. This valve replacement significantly reduced unaccounted for water. CVO\