City of Richland Comprehensive Water System Plan

Transcription

1 City of Richland June 2010 RH2 Engineering, Inc 114 Columbia Point Drive, Suite C Richland, WA Contact: Paul R. Cross, P.E. (509)

2 Prepared by: June 2010 Signed: 6/28/2010 Signed: 6/28/2010 City of Richland RH2 Engineering, Inc. P.O. Box Columbia Point Drive, Suite C Richland, WA Richland, WA Contact: John Finch Contact: Paul Cross, P.E. (509) (509) Printed on Recycled Paper

3 Table of Contents EXECUTIVE SUMMARY PURPOSE OF THE PLAN... ES-1 CHANGES SINCE THE LAST PLAN UPDATE... ES-1 SUMMARY OF KEY ELEMENTS... ES-2 Retail Water Service Area... ES-2 Past Water Usage and Conservation... ES-2 Future Water Demands and Water Supply... ES-2 Water Source and Quality... ES-3 Operations and Maintenance... ES-3 Water System Evaluations... ES-3 Proposed Water System Improvements and Financing Plan... ES-4 CHAPTER 1 DESCRIPTION OF WATER SYSTEMS WATER SYSTEM OWNERSHIP AND MANAGEMENT SYSTEM History and background History Description of Water Systems Topography Inventory of Existing Facilities Existing Service Area Future Service Area Related Plans Service Area Agreements and Policies Condition of Service Satellite Management Agency Duty to Serve Local Government Consistency Water Resource Inventory Area (WRIA) Planning SUMMARY OF PLAN CONTENTS DEFINITION OF TERMS LIST OF ABBREVIATIONS CHAPTER 2 PLANNING AND WATER DEMANDS INTRODUCTION CURRENT SERVICE Existing Land Use Service Area Existing Population Existing Service Connections Demand Monitoring and Data Collection Current Water Supply and Consumption Irrigation Use Unbilled and Unaccounted-For Water Equivalent Residential Units Projected Growth and Demands Efficiency Forecast CHAPTER 3 SYSTEM ANALYSIS INTRODUCTION SYSTEM DESIGN AND PERFORMANCE STANDARDS Water Quality Average and Maximum Daily Demands Peak Hour Demand i J:\Data\RIC\ \Plan\Report\Final Revisions\TOC.doc

4 Table of Contents Pump Stations Storage Fire Flow Pressure Pipelines Telemetry System Backup Power Requirements Valve and Hydrant Spacing WATER QUALITY Drinking Water Regulations Future Regulations Source Water Quality Distribution System Water Quality ENDANGERED SPECIES ACT Federal Implementation of the ESA Washington State Implementation of the ESA- Impacts on Water Supply Planning The City of Richland and ESA Listed Species Impact Mitigation Measures WATER SYSTEM DESCRIPTION AND FACILITY EVALUATION Source of Supply Treatment Facilities Booster Stations Reservoirs Distribution System Transmission System Control Valves WATER SYSTEM ANALYSIS Fire Flow Analysis Distribution System Analysis Transmission System Analysis Source Capacity Analysis Storage Capacity Analysis Future Storage Requirements Physical Capacity Analysis Hydraulic Model Development SYSTEM DEFICIENCIES Fire Flow Distribution System Transmission System Source Capacity Storage Capacity CHAPTER 4 EFFICIENCY PROGRAM INTRODUCTION WATER USE EFFICIENCY RULE DESCRIPTION OF CURRENT WUE PROGRAM CONSERVATION GOALS AND OBJECTIVES EVALUATION OF MEASURES FOR COST-EFECTIVENESS WATER USE EFFICIENCY PROGRAM EVALUATION DISTRIBUTION SYSTEM LEAKAGE AND CONTROL PLAN SOURCE OF SUPPLY ANALYSIS WATER RIGHTS WATER SYSTEM CHARACTERISTICS Approved Water Right Changes Other Pending Change Applications ii J:\Data\RIC\ \Plan\Report\Final Revisions\TOC.doc

5 Table of Contents Other Pending Water Rights Applications INTERTIES Water Rights CHAPTER 5 SOURCE WATER PROTECTION INTRODUCTION REGULATORY FRAMEWORK CITY OF RICHLAND WATER UTILITY SUSCEPTIBILITY ASSESSMENT WELLHEAD PROTECTION AREA DELINEATION CHAPTER 6 OPERATIONS AND MAINTENANCE PROGRAM WATER SYSTEM MANAGEMENT AND PERSONNEL Operations and Maintenance Operator Certification ROUTINE OPERATIONS AND PREVENTATIVE MAINTENANCE Staffing Routine Operations Available Equipment Preventitive Maintenance WATER QUALITY MONITORING Routine Procedures Violation Procedures EMERGENCY RESPONSE PROGRAM PUBLIC NOTIFICATION SAFETY PROCEDURES CROSS-CONNECTION CONTROL PROGRAM RECORDKEEPING AND REPORTING OPERATIONS AND MAINTENANCE DEFIENCIES CHAPTER 7 POLICIES AND DESIGN CRITERIA INTRODUCTION SUPPLY POLICIES Cross-Connection Control Quality Water Use Efficiency Regional Participation Fire Flow FACILITY DESIGN AND CONSTRUCTION POLICIES Minimum Standards Pressure Velocities Supply Storage Transmission and Distribution Supply and Booster Pump Stations Pressure Reducing Stations Control Maintenance Joint-Use CUSTOMER SERVICE POLICIES Project Review Procedures Policies For Outside Parties Water Service and Connection iii J:\Data\RIC\ \Plan\Report\Final Revisions\TOC.doc

6 Table of Contents Construction Certification and Follow-up Procedures Annexations Temporary Services Emergency Service Planning Boundaries FINANCIAL POLICIES Connection Charges CHAPTER 8 CAPITAL IMPROVEMENT PLAN INTRODUCTION EXHIBITS WATER QUALITY SUPPLY STORAGE TRANSMISSION DISTRIBUTION NON-CONSTRUCTION PROJECTS CHAPTER 9 - FINANCIAL PLAN INTRODUCTION PAST FINANCIAL PERFORMANCE Comparative Financial Statements Existing Long-Term Debt FUNDING SOURCES Governmental Grant and Loan Programs Publicly Issued Debt Cash Resources Connection Fees CAPITAL FINANCING PLAN RATE STRUCTURE AND CONSERVATION OBJECTIVES Existing Retail Rates Rate Structure and Conservation CONCLUSION CHAPTER 10 MISCELLANEOUS DOCUMENTS Meeting of the Consumers Local Government/Adjacent Utility Correspondence State Environmental Policy Act (SEPA) Determination Agreements TABLES TABLE ES-1 FIVE-YEAR CAPITAL FINANCING PLAN 2010 THROUGH ES-4 TABLE 1-1 WATER SYSTEM OWNERSHIP INFORMATION TABLE 1-2 RICHLAND WATER SYSTEM DATA TABLE 1-3 RICHLAND PIPE SUMMARY BY TYPE TABLE 1-4 RICHLAND PIPE SUMMARY AGE TABLE 1-5 ABBREVIATIONS TABLE 2-1 LAND USE TABLE 2-2 HISTORICAL POPULATION TABLE 2-3 METER COUNT BY CUSTOMER CLASS (2007) TABLE 2-4A SUPPLY BY SOURCE TABLE 2-4 HISTORICAL WATER SUPPLY TABLE WATER USE TABLE 2-6 WATER DEMAND BY PRESSURE ZONE (MGD) iv J:\Data\RIC\ \Plan\Report\Final Revisions\TOC.doc

7 Table of Contents TABLE 2-7 DEVELOPED AREA BY LAND USE AND PRESSURE ZONE TABLE 2-8 DENSITY OF DEVELOPMENT BY PRESSURE ZONE TABLE 2-9 ESTIMATE MAXIMUM DAY SALES (MG) TABLE 2-10 REGIONAL WATER CONSERVATION PLAN SUMMARY (MG) TABLE 2-11 ERU CALCULATIONS TABLE 2-12 POPULATION PROJECTIONS TABLE 2-13 GROWTH PROJECTIONS AND ERU DEVELOPMENT TABLE 2-14 ERU AND DEMAND PROJECTIONS (MGD) TABLE 3-1 FIRE FLOW REQUIREMENTS TABLE 3-2 NUMBER NOT USE TABLE 3-3 PRESSURE ZONE SERVICE RANGE TABLE 3-4 NMFS ENDANGERED/THREATENED SPECIES NEAR RICHLAND TABLE 3-5 NMFS ENDANGERED/THREATENED SPECIES NEAR BENTON COUNTY TABLE 3-6 EXISTING WELLS TABLE 3-7 EXISTING PUMP CAPACITY TABLE 3-8 EXISTING RESERVOIRS TABLE 3-9 CONTROL VALVES TABLE 3-10 HIGH FIRE FLOW SITES TABLE 3-11 EXISTING PUMPS TABLE 3-12 SUPPLY CAPACITY (GPM) EXISTING FACILITIES TABLE 3-13 SUPPLY CAPACITY (GPM) FUTURE FACILITIES TABLE 3-14 FIRE FLOW DEMAND AND RESERVOIR REFILL TABLE 3-15 OPERATIONAL STORAGE TABLE 3-16 STANDBY STORAGE EXISTING FACILITIES (MG) TABLE 3-17 EQUALIZING STORAGE TABLE 3-18 STORAGE REQUIREMENTS EXISTING FACILITIES (MG) TABLE 3-19 STANDBY STORAGE FUTURE FACILITIES (MG) TABLE 3-20 EQUALIZING STORAGE (MG) FUTURE FACILITIES TABLE 3-21 STORAGE REQUIREMENTS FUTURE FACILITIES (MG) TABLE 3-22 PHYSICAL CAPACITY ANALYSIS TABLE 3-23 MODELING FRICTION FACTORS TABLE 4-1 INTERTIES TABLE 4-2 EXISTING WATER RIGHT(S) STATUS TABLE 5-1 CITY OF RICHLAND WATER FACILITIES INVENTORY TABLE 5-2 DOH SENTRY DATA GENERAL INFORMATION TABLE 5-3 DOH SENTRY DATA SOURCE INFORMATION TABLE 6-1 WATER DIVISION PERSONNEL, CERTIFICATES AND RESPONSIBILTIES TABLE 6-2 EQUIPMENT AND VEHICLE LIST TABLE 6-3 WATER TREATMENT SUPPLIES AND CHEMICALS TABLE 6-4 SOURCE WATER QUALITY MONITORING REQUIREMENTS TABLE 8-1 INDIRECT COSTS VS. CONSTRUCTION COSTS TABLE 8-2 ESTIMATED PIPE COST TABEL 8-3 CAPITAL IMPROVEMENT PLAN TABLE 9-1 STATEMENT OF REVENUE AND EXPENSES TABLE 9-2 REVENUE AND EXPENSES FOR TABLE 9-3 STATEMENT OF NET ASSETS TABLE 9-4 SCHEDULE OF LONG-TERM DEBT TABLE YEAR CAPITAL FINACING PLAN TABLE 9-6 AFFORDABILITY TEST FIGURES FIGURE 1-1 ADJACENT SERVICE AREAS FIGURE 2-1 LAND USE FIGURE 2-2 SERVICE AREA FIGURE MONTHLY CUSTOMER WATER USE BY CLASS, MG v J:\Data\RIC\ \Plan\Report\Final Revisions\TOC.doc

8 Table of Contents FIGURE 2-4 TOTAL WATER SUPPLY (MG) FIGURE 2-5 WATER SUPPLY RANGES (MGD) FIGURE MONTHLY CONSUMPTION (MGD) FIGURE 2-7 IRRIGATION AREAS FIGURE 3-1 EXISTING HYDRAULIC PROFILE FIGURE 3-2 EXISTING WATER SYSTEM FIGURE 3.3 PRESSURE ZONES FIGURE 3-4 AVAILABLE FIRE FLOW AT 20 PSI RESIDUAL EXISITING WATER SYSTEM FIGURE 3-5 AVAILABLE FIRE FLOW AT 20 PSI RESIDUAL AND 10 FPS VEOLOCITY FIGURE 3-6 AVAILABLE FIRE FLOW AT 20 PSI RESIDUAL 2013 WATER SYSTEM FIGURE 3-7 PRESSURE DURING PEAK HOUR DEMAND EXISTING WATER SYSTEM FIGURE 6-1 CITY OF RICHLAND WATER DIVISION ORGANIZATIONAL CHART FIGURE 8-1 CAPITAL IMPROVEMENT PLAN NORTH FIGURE 8-2 CAPITAL IMPROVEMENT PLAN - SOUTH FIGURE 8-3 PROPOSED HYDRAULIC PROFILE APPENDICES Appendix A Appendix B Appendix C Appendix D Appendix E Appendix F Appendix G Appendix H Appendix I Appendix J Appendix K Appendix L Local Government Consistency Diurnal Curves Consumer Confidence Report Coliform Monitoring Plan Developer Standards, Standard Specifications and Details Wellhead Protection Program IDSE for Stage 2 D/DBP Water Quality Monitoring Plan Water Rights Safety Procedures Cross Connection Control Plan Line Item Budget & Rate Schedule vi J:\Data\RIC\ \Plan\Report\Final Revisions\TOC.doc

9 Executive Summary PURPOSE OF THE PLAN WAC requires that water systems update their every six years. The City of Richland (City) uses this opportunity to update its hydraulic system model with the changes that have occurred since the last plan update. As water system demands change, the model is used to verify and recommend new elements in the City s Capital Facilities Plan. This (Plan) was updated in concert with the Regional Water Forecast and Conservation Plan (RWFCP) written for the Quad Cities of Richland, West Richland, Kennewick and Pasco. This plan did not attempt to duplicate the efforts provided in the RWFCP, and accepts the water use efficiency program, control plan and projected long-term needs as identified. Capital Facilities Plan timelines were strengthened and reinforced by the modeling and analysis efforts. Some key strategic projects were moved up in priority while other major supply projects were pushed out beyond the 20-year projection. Many of the identified projects will depend upon development pressures in the respective areas to schedule and pay for those improvements. The City has the rates and facility fees in place to pay for the improvements over time. No additional debt service is currently anticipated to support the required water system improvements. The City s water system is well managed and serves high quality water to its customers. Improvements made in the past ten years have made the system a model example of tracking down leaks and unaccounted-for water losses. The key needs of the system revolve around extending the service area to meet the growing populations in the Urban Growth Area (UGA) in a logical and cost-effective manner. CHANGES SINCE THE LAST PLANS The Municipal Water Law was passed since the last in The City is required to have efficiency goals, water efficiency measures and a control plan to reduce distribution system leakage below 10 percent. The City has made huge strides in reducing distribution system leakage, which is reflected in the ability to delay major supply projects. The City has worked hard to diversify its use of water and to supply more non-treated water for non-potable purposes. This keeps costs down by avoiding the expense of treating water that is used for irrigation or industrial uses. It also protects public health and safety by keeping sources that are high in nitrates, temperature or sulfur content out of the drinking water. The Municipal Water Law defines water rights for municipal water supply purposes based upon beneficial use by a specific group of governmental entities. Governmental and governmental proprietary purposes include, but CITY OF RICHLAND COMPREHENSIVE WATER SYSTEM PLAN ES-1 J:\Data\RIC\ \Plan\Report\Final Revisions\ExecutiveSummary.doc

10 Executive Summary are not limited to, beneficial use for commercial, industrial, irrigation of parks and open spaces, institutional, landscaping, fire flow, water system maintenance, and repair or related purposes. The City uses non-treated water to satisfy many of these governmental and non-governmental proprietary purposes that may become potable demands in the future. The City also requires developers to utilize irrigation water from the local irrigation districts when available to limit the future demands upon the City s water rights. SUMMARY OF KEY ELEMENTS Retail Water Service Area The retail water service area continues to grow as changes are made in the City s UGA. A significant segment of the expanding UGA is within the Badger Mountain Irrigation District (BMID) in South Richland. The City and BMID have agreed to cooperate in this area, but the ability of BMID to serve some of the area cost effectively with their existing water rights is uncertain. The agreement between the City and BMID includes language to revisit cooperative retail water service area boundaries as development proceeds. The City and BMID will plan pressure zones at common elevations with uniform development standards. Past Water Usage and Conservation The RWFCP and annual performance reports document that the City has very low distribution system leakage. In 2000, the City had 27.2 percent of its total water production classified as unaccounted-for water. In an effort to reduce this percentage, the City obtained a Washington State Public Works Trust Fund Loan for $7 million, which was matched by the City with an additional $3 million, for a 3-year construction period in which they started a water main replacement project. The project was completed after the City received a second 3-year construction period loan. The results were dramatic; the reductions in main leak repairs were significant. Main leak repairs hit a high in 1996 with a total of 171 main leak repairs to a mere 8 main leak repairs in The City had a goal to have 10 percent water loss, and in 2004 reported only 9.5 percent leakage. Then, in 2007 the City surpassed its 10 percent goal and had only 4.4 percent distribution system leakage. Future Water Demands and Water Supply In 2002, the City identified the need to develop a second major source of supply by the year Demands for the City are forecasted to increase 45 percent by The demand for the City of West Richland that is supplied by the City is not known, but could be as high as 3.6 million gallons per day (MGD). Assuming West Richland uses its full draw, the water supply will be required to provide 49 MGD on a maximum day in The water system must have the capability to hydraulically distribute and transmit over 52,000 gpm to meet peak hour demands plus fire flow of as much as 4,500 gallons per minute (gpm). The demand projections in this Plan vary from those in the 2002 and the RWFCP. The main difference is the 2002 Plan used a 27 percent unaccounted-for water quantity and projected that percentage indefinitely into the future. This Plan uses the current unaccounted for water value of 4 percent. The RWFCP plan projected water use as a linear multiplier against population growth. This is likely overly conservative as it assumes new customers will use water at the same rate as the existing system as a whole. With the City s new irrigation J:\Data\RIC\ \Plan\Report\Final Revisions\ExecutiveSummary.doc ES-2 CITY OF RICHLAND COMPREHENSIVE WATER SYSTEM PLAN

11 Executive Summary requirements, new customers will likely use much less water. The current supplies within the City can support the 2028 projections. New supplies in South Richland continue to be needed to provide redundancy and reduce risk if the major pipeline crossing the Yakima River fails, not because development of supplies are necessary at this time. Water Source and Quality The City of Richland depends on the Columbia River and five ground wells or well fields to supply drinking water to its customers. The City also has standalone water systems that supply water for irrigation, industrial uses and other governmental proprietary purposes to its customers without treatment. Irrigation customers can also receive their irrigation water from the Kennewick Irrigation District, BMID, Columbia Irrigation District, and a small percent are supplied by private irrigation systems. The City also wheels water through its treated water system to the City of West Richland as West Richland s means to access their portion of the Quad City water. The quality of the Columbia River water and the North Richland Well Fields remains high after treatment. Some wells within the overall supplies are high in nitrates, temperature or sulfur, which can impact taste and odor. Where water supplies with these water quality problems can be moved to other governmental proprietary purposes, the City does so to avoid expensive treatment costs. Established treatment sites continue to provide high quality water that is both healthy and aesthetically pleasing. Operations and Maintenance The City of Richland does an outstanding job of performing routine operations and maintenance on its system. The City strives to maximize the operating efficiency and life of all production and distribution system components through a prescribed preventive maintenance program. The Water Treatment Plant (WTP) is the hub for operations activities and requires 24-hour operator attention. The WTP has an Operations and Maintenance manual that is kept at the Plant for staff reference. The City s telemetry system has the ability to monitor reservoir levels, operate well and pump stations, and monitor intrusion alarms remotely from the WTP control room. Daily monitoring of all other sources, pumping equipment and storage facilities ensures that mechanical systems are functioning properly and facilities are secure. Daily monitoring of water quality through sampling and testing ensures that the supply and treatment equipment are functioning properly and the water is safe to consume. Water System Evaluations The water system hydraulic model is a useful tool for the City. The improvements are then presented that are necessary to resolve existing deficiencies and plan for future growth. The six-year capital improvement plan (CIP) is designed along with the entire to be used as a guideline during each yearly budget process. The list of deficiencies that forms the basis of the proposed CIP are summarized by the following major water system components. Water Quality Supply Storage CITY OF RICHLAND COMPREHENSIVE WATER SYSTEM PLAN ES-3 J:\Data\RIC\ \Plan\Report\Final Revisions\ExecutiveSummary.doc

12 Executive Summary Transmission Distribution Operations and Maintenance Growth within the City and demand by West Richland will create the majority of deficiencies outlined in the CIP. Other deficiencies within the rehabilitation plans of the City are part of an annual program to address distribution system repairs and replacements, water treatment facility renewal and replacement, and water system security improvements. The City also looks at irrigation utility capital improvements as a way to extend and bolster potable water supply systems. Proposed Water System Improvements and Financing Plan The City believes that the water system improvements planned can be financed with current grants and loans, together with modest rate and capital facility charge adjustments. Table ES-1 Five-Year Capital Financing Plan 2010 through 2014 Project Estimated Total Cost Distribution System Repairs & Replacement $745,000 $370,000 $235,566 $700,000 $700,000 $2,750,566 Water Treatment Facility Renewal and Replacement $205,000 $380,000 $300,000 $300,000 $300,000 $1,485,000 Irrigation Utility Capital Improvements $25,000 $25,000 $25,000 $25,000 $25,000 $125,000 Water System Security Improvements $50,000 $50,000 $100,000 Columbia Park Trail Transmission Main $610,000 $1,210,000 $1,820,000 New South Richland Water Source $100,000 $400,000 $500,000 Water Transmission Line - 2nd Yakima River Crossing $0 $2,193,301 $464,434 $2,657,735 Tapteal IV Reservoir and Pump Station $0 $1,000,000 $1,000,000 TOTAL Funds Required $1,735,000 $4,628,301 $1,025,000 $1,025,000 $2,025,000 $10,438,301 Participating Funds Estimated Total 2014 Revenue Water Rates $1,000,000 $1,000,000 $1,000,000 $1,000,000 $1,000,000 $5,000,000 Facility Fees $735,000 $1,635,000 $25,000 $25,000 $25,000 $2,445,000 Drinking Water State Revolving Fund Loan $0 $1,993,301 $1,993,301 Unfunded $0 $1,000,000 $1,000,000 TOTAL Funds Available $1,735,000 $4,628,301 $1,025,000 $1,025,000 $2,025,000 $10,438,301 In conclusion, the City s water system is in excellent condition both operationally and financially. The progressive improvements completed in the past ten years have led to a system that is a viable J:\Data\RIC\ \Plan\Report\Final Revisions\ExecutiveSummary.doc ES-4 CITY OF RICHLAND COMPREHENSIVE WATER SYSTEM PLAN

13 Executive Summary component of the overall City infrastructure and is a model of efficiency. The City continues to plan for the future in a way that will maintain the system in peak form, protecting the safety and well being of its citizens. CITY OF RICHLAND COMPREHENSIVE WATER SYSTEM PLAN ES-5 J:\Data\RIC\ \Plan\Report\Final Revisions\ExecutiveSummary.doc