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HomeMy WebLinkAboutPackets - Council Packets (1560) AGENDA ORO VALLEY TOWN COUNCIL SPECIAL SESSION SEPTEMBER 13, 1999 ORO VALLEY TOWN COUNCIL CHAMBERS 11,000 N. LA CANADA DRIVE SPECIAL SESSION — AT OR AFTER 6:00 P.M. CALL TO ORDER ROLL CALL EXECUTIVE SESSION —AT OR AFTER 6:00 P.M. Pursuant to A.R.S. 38-431.03 (A)(3) legal advice relating to: 1. Tucson Water Service Area 2. Rancho Vistoso PAD 3. Payless ShoeSource v. Town of Oro Valley 4. Development Agreement with Southwest Properties, Inc. (Radisson Hotels Worldwide) ADJOURNMENT OF SPECIAL SESSION AGENDA ORO VALLEY TOWN COUNCIL & WATER UTILITY COMMISSION JOINT STUDY SESSION SEPTEMBER 13, 1999 ORO VALLEY TOWN COUNCIL CHAMBERS 11,000 N. LA CANADA DRIVE STUDY SESSION —AT OR AFTER 7:30 P.M. (Immediately following Special Session listed above) CALL TO ORDER ROLL CALL 1. POTABLE WATER MASTER PLAN REVIEW 2. STATUS REPORT ON ALTERNATIVE WATER RESOURCES ADJOURNMENT The Town of Oro Valley complies with the Americans with Disabilities Act (ADA). If any person with a disability needs any type of accommodation, please notify the Oro Valley Town Clerk at 297-2591. POSTED: 9/10/99 4:30 P.M. LH 1 TOWN OF ORO VALLEY STUDY SESSION COUNCIL COMMUNICATION MEETING DATE: SEPTEMBER 13,1999 TO: HONORABLE MAYOR& COUNCIL FROM: David G. Hook, P.E. Water Utility Director SUBJECT: POTABLE WATER SYSTEM MASTER PLAN SUMMARY: At their meeting of 7-12-99, the Water Utility Commission (Commission) discussed and considered several proposed policies and guidelines key to the development of the new master plan. The Commission voted unanimously to forward the proposed policies and guidelines to Mayor and Council so that the master planning process could continue. The policies and guidelines considered by the Commission need to be addressed by Mayor and Council at this time so that the Master Plan Technical Advisory Committee (T.A.C.) and the consultant, WestLand Resources, Inc., (WRI) receive some indication from the Commission and the Mayor and Council on preferences related to certain substantive issues. These issues are essential to the next phases of the development of the revised master plan — identification of infrastructure required and calculation of a revised impact fee to fund that required infrastructure. To move forward without discussion with Mayor and Council would risk the possibility that some or all of the remaining effort may not meet with the Mayor and Council's expectations. Avoiding the reworking of significant portions of the work product is obviously cost effective and time efficient. The project budget and schedule anticipated the need for this discussion. The policies and guidelines that require attention are summarized in the attached memo from the consultant, WestLand Resources, Inc. The format is slightly different than as last presented to the Commission in an attempt by staff to clarify the topic, issue, policy or guideline and brief background information. Staff has also incorporated additional information as requested by the Commission, on storage requirements and project prioritization. Upon completion and adoption of the final Master Plan report, the Commission and the Mayor and Council will have the opportunity to formally consider revising the Mayor and Council Water Policies so that document is congruent with the Master Plan report. TOWN OF ORO VALLEY COUNCIL COMMUNICATION PAGE 2 OF 2 FISCAL IMPACT: There is no direct fiscal impact of the requested discussion. The Commission and the Mayor and Council will address possible revisions to the existing impact fee structure after adoption of the final Master Plan report. RECOMMENDATIONS OF THE WATER UTILITY COMMISSION: The Commission recommends that the Mayor and Council support the policies and guidelines as developed by the T.A.C. so the master planning process can move forward. RECOMMENDATIONS OF STAFF: Staff stands with the Commission in its recommendation. ATTACHMENTS: 1. Preliminary Potable Water System Master Plan Proposed Policies and Guidelines (8-3-99). 2. Preliminary draft, Revised Master Plan (3-99) SUGGESTED MOTION: No formal action is required of the Mayor and Council at this time. c I , er Utility Direct•49/ Ill Town Manag-r Aug-04-99 10:43A WestLand Resources 520-206-9518 P_02 PREL IMI. AR Y - FOR RE VIE W POTABLE WATER SYSTEM MASTER PLAN Proposed Policies and Guidelines (Revised 8/3/99) 1. LIMITS OF WATER SERVICE AREA Issue: Determine the ultimate service area boundaries in order to adequately plan for future water system layout and facility requirements. Policy or Guidelines: The projected service area boundaries for the water system is expected to expand with the proposed annexation boundaries as identified in the Town's general plan, The ultimate limits of the water service area will be as shown on Exhibit of the Town of Oro Valley Water System Master Plan. Background• The projected town limits of Oro Valley and the projected limits of water service area generally extend from the Pinal County line on the north, Oracle Highway on the east, Orange Grove Road on the south,and Thornydale Road on the west. 2. WATER RESOURCES AND DEVELOPMENT Issue: Determine how will the water master plan will incorporate several alternative water resources for the long-term supply of the Town of Oro Valley water company. Policy or Guideline: The water system master plan and the resulting infrastructure must be designed to be flexible enough to incorporate a"distributed system"of supply or a "point source" of supply. Background: • Existing system is a distributed system (multiple wells located within distribution system. • Future system to be distributed system or possibly a point source. • Point source = large diameter mains supplying off-site water to existing distribution system by major tapping stations. 3. IRRIGATION/TURF WATER Issue: Determine how the Town of Oro Vally potable water system master plan will incorporate the projected loss of the golf courses and other major turf areas from its water distribution system. Policy or Guideline: The goal of the master plan will be to provide the flexibility within the water system infrastructure to adapt to the varying conditions of removing golf courses in the potable water system. WestLand Resources,Inc. Engineering and Environmental Consultants Page t of 7 C\MyFileiJobsW972O6-2\OV WaierMasterPlan'potable wtr sys guidelines doc Aug-04-99 10:43A WestLand Resources 520-206-9518 P.03 PRELIMINARY - FOR REVIEW Background: It is estimated that all golf courses with the exception of the 9-hole El Conquistador Golf Course will be served by a separate reclaimed water or untreated CAP water distribution within the next five years. The domestic system shall be designed to operate reliably during the period of serving the golf courses as well as efficiently using all of the facilities built after the golf courses have been removed from the system. 4. FIRE FLOW POLICY Issue: Determine what policies will be adapted by the Town of Oro Valley water utility which will effect the system design and operation. Policy or Guideline: The water master plan design criteria will include reservoir and distribution system sizing for the maximum fire flow and flow duration for individual zones. Transmission mains will be sized to provide the ability to provide a minimum of 20 psi residual pressure within the system at fire flow conditions and at peak day demands. This criteria is required for both the existing system upgrade requirements and the future infrastructure system layout. Background: • TOV adopted the 1997 Uniform Fire Code. • Criteria for fire flow: - "quantity of flow"based upon main sizing or booster station capacity,and -r "duration of flow"based upon reservoir capacity. • Offsite plant requirements funded by Town via impact fees: - transmission mains,reservoirs,and booster stations. • Onsite plant requirements funded by developers: - adequately sized distribution mains in subdivisions, - properly spaced fire hydrants,and - plan built to Oro Valley Water Utility(OVWU)specifications. • Master plan not written with the intent to retrofit or upgrade subdivisions currently deficient in fire flow. • Master plan includes fire flow upgrades to offsite utility infrastructure only. 5. STORAGE CAPACITY REQUIREMENTS Issue: Reservoir storage capacity is highly critical in the design and operation of water systems. Several design criteria exists between different water companies for the amount of storage required to adequately,reliably,and economically serve a water system. Policy or Guideline: The recommended storage capacity requirement for the OVWU is 1.25 times the average daily demand(ADD)plus fire flow requirements. WestLand Resources,Inc. Eng neenng ant!Environmental Consultants Pe$C 2 Of 7 C.\MyFilesVobs,97206-2 V WaterMasterPIan',potable wtr rya guidelines doc Aug-04-99 10:44A WestLand Resources 520-206-9518 P.04 PREL IMI1 VA R Y - FOR RE VIE W Background: • TOV Will provide fire flow reserves for 2-or 3-hour durations, whichever is required. • The system will provide peak hour demand. • The system will provide reserve capacity for emergency outages. • Current design capacity requirement is approximately one times the ADD (existing storage capacity is less than one times ADD). • Advantages: increased operational flexibility, - reduced cycling for wells and booster stations, - reduced pressure fluctuations, - greater reliability during outages, and - reduced well capacity requirements. • Disadvantages: - additional costs of building larger reservoirs, - aesthetics of larger reservoirs,and - additional land requirements for larger reservoirs. 6. SYSTEM PRESSURE REQUIREMENTS Issue: Pressure fluctuations in a water system are highly dependent on the water system design. Two different methods at system pressure control are typically used for standard water system design. The two methods are either floating reservoir system or pump storage system. Policy or Guideline: All water system zones shall use of a floating reservoir system, wherever possible, with the water surface of the reservoir set at the high water elevation of the system with approximately 100-foot pressure zones. Background: • Allows customers within a zone to be served directly from the reservoir by gravity. • System pressure is regulated by reservoir elevation. • Provides for a highly reliable system with low-pressure fluctuations. • Pressure fluctuations under static conditions will typically vary as little as 5 psi. • Proper main size will avoid excess losses which can reduce operating pressures. 7. WATER QUALITY REGULATIONS Issue: Water quality for the OVWU system is regulated by both federal and state standards. The issue is whether additional water quality regulations will be required by Oro Valley over and above the federal and state regulations. WestLand Resources,Inc. Engineering and Enwonrnentsl Consultants C\MyFiles''Jabs\97206-2 OV WalciNhwerPlanvotabit wtr sys gutdelmcs.doc Page 3 of 7 Aug-04-99 10:44A WestLand Resources 520-206-9518 P.05 PRELIMINARY - FOR REVIEW Policy or Guideline: To provide chlorination facilities at the wellhead of each production well to maintain the required residual chlorination within the system. Background: • Will help meet established water quality standards of the SDWA. • Will help reduce the occurrence of positive coliform tests and possible system contamination. 8. RELIABILITY EMERGENCY PLAN Issue: It is a requirement of ADEQ that each community water system develop an Emergency Operation Plan. The issue is what system design criteria will be required in order for the Town of Oro Valley to develop an adequate emergency reliability emergency plan. Policy or Guideline: The following items will be incorporated into the design of all water system facilities: • System storage shall be a floating storage system wherever possible. • System must be designed to provide the most reliability in the event of outages. • Provide a method of backup power for key facilities during power outages. • Provide looped system,whenever possible, for increased reliability. • Provide telemetry system for system monitoring and control. Background: The emergency operation plan shall detail the steps that a water system will take to insure continuation of service in the following emergency situations: • Loss of source of a water supply. • Loss of supply due to major component failure. • Damage to power supply equipment or loss of power. • Contamination of water in the distribution system as a result of backflow. • Collapse of reservoirs or reservoir roofs or pump-house structures. • Breaks in transmission or distribution lines. • Chemical or micro-biological contamination of the water supply. 9. LAND ACQUISITION Issue: Experience has demonstrated that early identification of land and right-of-way needs for the future use by the municipality and its utilities can result in substantial acquisition savings when compared to urgent need acquisitions. The issue is to set a policy to provide the early identification of land required and methods obtaining land acquisition. WestLand Resources,Inc. Engineering and Environmental Consultants Page 4 of T C\MyFilesVobs197206-2\0V w"ate rMasterPlan\potable wff s,rs guidelines doe Aug-04-99 10:45A WestLand Resources 520-206-9518 P.06 PRELIMINARY - FOR REVIEW Policy or Guideline: Develop an internal tracking andfor monitoring program within the Town's planning and review process to alert staff and developers early in the planning process that water facilities are required in a specified location. • Acquire land prior to actual facility development: - insure that land is available when needed,and - avoid paying higher price for land under duress conditions. Background: The water system master plan will provide locations and sizes for future wells, reservoirs, booster stations, and major transmission mains to serve the water service area. Many factors and constraints will be required to determine the final locations for each site. A multiple of factors are required including proximity to water mains, power, access, specific elevations for reservoirs and boosters, hydrologic characteristics for well sites, and noise, buffer requirements, and aesthetic screening for all facilities. 10. EXISTING SYSTEM UPGRADES Issue: The water master plan will evaluate and identify all existing facilities which either must be upgraded, or new facilities required, to bring the existing system into compliance with the design criteria of the master plan. Policy or Guideline: All existing facilities including wells, boosters, reservoirs, and transmission mains shall be upgraded in capacity and system operation in order to meet the new design criteria of the water system master plan. • New facilities and/or upgrades to be financed by rates. • Upgrades limited to existing facilities and spine distribution mains. • Excludes undersized mains or distribution systems within subdivisions or smaller distributions systems. Background: It is anticipated that portions of the existing water system will not meet the new system design criteria adapted by OVWU. The master plan will identify the areas of the existing water system where deficiencies exist. The master plan will specify the required new facilities and/or facility upgrades to bring the existing system in compliance with the design criteria. These facilities may include additional wells,booster station upgrades,reservoir capacity additions, and transmission main augmentations. WestLand Resources,Inc. Engineering and Environmental Consultants Page S of 7 C lyFiles,.Jobs\972O15-2\OV WaterMasterPtampotable wtr cyt gwdelines doe Aug-04-99 10:45A WestLand Resources 520-206-9518 P.07 PRELIMINARY - FOR REVIEW 11. OVERSIZE REFUNDS AND CREDITS Issue: All water mains as developed in the master plan will be sized to deliver adequate flows to meet the peak daily demand plus fire flow. These water main sizes will generally be larger than required to serve a single development. During the extension of water main facilities to serve a particular development, a policy must be in place in order to build the ultimate sized facilities as well as provide fairness of allocation of costs. Policy or Guideline: • Build the ultimate sized water mains for all water main extensions. • Developers to be required to install ultimate sized mains to their projects. • Refunds provided for material cost difference in oversizing via impact fee funds. • Facilities including wells,boosters, and reservoirs will be constructed by OVWU with impact fee funds. Background: OVWU code has an existing oversizing refund policy whereby the initial development installs the ultimate sized water main at their cost. The Town will refund the oversizing cost and transmission main by reimbursing the developer for material cost difference between what is required to deliver water to the subject property and what was required to enhance the water system for future growth. The oversizing refund credit policy will typically be used for water distribution and transmission mains only. 12. WATER SYSTEM DEVELOPMENT AND FINANCING Issue: To develop a method of water system financing for both existing system upgrade requirements and water system expansion for growth and expansion of service areas. A method of financing shall be developed to serve both types of water system development improvements and shall be equitable in the allocation of cost to those who benefit. Policy or Guideline: Construction shall be funded with a combination of financing, whereby OVWU provides bond financing,and the developer contributes up front capital to the project. • OVWU sells bonds for upgrades to existing facilities-repaid by rates. • OVWU sells bonds for growth-related facilities-repaid by impact fees. • Developer constructs offsite mains: - oversize costs will be refunded by impact fees,and - additional refunds may be received from"protected facilities" agreement. WestLand Resources,Inc. Enginwing and Environ nantat Consultants Page 6 of 7 CAMyFilcsUobs1972O-2'.0V WatcrMascerPlan\pcxable wtr sys Rutdclirtcs•doc Aug-04-99 10:46A WestLand Resources 520-206-9518 P .08 PRELIMINARY - FOR RE VIE W Background: Some of the key issues in developing a financing mechanism for the growth-related projects funded by bonding are as follows: • Planning of system improvements - All facilities must be adequately planned of proper size and capacity for the water system as a whole,rather than just a single development. • Abilities to finance up front cost - Developers of a project will typically not have the capital financing available for a large capital outlay to construct water facilities of adequate size. • Control of system improvements - It is in the best interest of the water company to maintain consistent quality and maintenance of facilities to control the design and construction of all large facility improvements. • Project developer accountability - A method of prioritization and approving projects shall be implemented to assure that development will occur in prescribed areas before the Town funds are committed to serve a specific project. This may require some accountability or contribution by the developer that his project will be built. • prioritization rioritization - Project priorities will be established based upon meeting system design requirements and,in addition,providing the greatest return of system development fees. • Bond repayment requirements- Limits shall be set on the bonds sold to assure the bonds shall be repaid by the system development fee revenues. • Capital improvement program flexibility - Capital improvement program for growth-related P F facilities must remain flexible in order to meet constantly changing growth scenarios. WestLand Resources,inc. Engineering ane Environmental Consultants Pagc 7 of 7 C\MyFiles,Jobs197206-2`,OV WeterMasterPlan`potablc wtr sys guicldincs.doc DRAFT ORO VALLEY POTABLE WATER SYSTEM MASTER PLAN (Sections 1.0 through 3.0) Prepared for: ORO VALLEY WATER UTILITY 1565 E.Rancho Vistoso Boulevard,Suite A Oro Valley,Arizona 85737 (520)297-5225 Prepared by: WESTLAND RESOURCES,INC. 2343 E.Broadway Boulevard,Suite 202 Tucson,Arizona 85719 (520)206-9585 MARCH 1999 Job No. 206.10 TABLE OF CONTENTS 1.0 INTRODUCTION 1 1.1 Objectives 1 1.2 Background 1 1.3 Public Outreach Program 4 2.0 SCOPE AND APPROACH 5 2.1 Define Key Issues 5 2.2 Water System Planning Horizon 5 2.3 Limits of Water Service Area 5 2.4 Water Resources and Development 6 2.5 Irrigation/Turf Water Policy 8 2.6 Fireflow Policy 9 2.7 Storage Capacity Requirements 11 2.8 System Pressure Requirements 11 2.9 Water Quality Regulations 12 2.10 Reliability Emergency Plan 13 2.11 Land Acquisition Policy 15 2.12 Existing System Upgrade Policy 16 2.13 Oversized Refund and Credit Policy 16 2.14 Water System Development and Financing 17 3.0 REGULATORY REQUIREMENTS AND CONSTRAINTS 21 3.1 Federal Laws 21 3.1.1 Safe Drinking Water Act(SDWA) 21 3.2. State Laws and Regulations 22 3.2.1 Arizona Department of Environmental Quality(ADEQ) 22 3.2.1.1 Regulatory Storage Requirements 22 3.2.1.2 Pressure Requirements 23 3.2.1.3 Regulatory Storage Requirements 23 3.2.1.4 Backflow Requirements 23 3.2.1.5 Emergency Operating Plan 23 3.2.2 Arizona Department of Water Resources(ADWR) 24 3.2.2.1 Groundwater Management Code 24 3.2.2.2 Active Management Areas 25 3.2.2.3 Conservation Requirements 25 3.2.2.4 Assured Water Supply 26 3.2.2.5 Groundwater Rights in AMAs 27 3.3 Local/Other Regulations 28 3.3.1 Oro Valley Water Policies 28 3.3.2 Oro Valley Water Utility Code 28 3.3.3 Monthly Water Service Fee and Commodity Charge 28 3.3.4 Installation/Connection Fees 29 3.3.5 Development Impact/Hook-Up Fee 29 3.3.6 Alternative Water Resources Development Fee 29 3.3.7 Other Miscellaneous Fees 29 WestLand Resources, Inc. Engineering and Environmental Consultants C:\Alytziles\Jobs\206.10\011Wtr Sys Mstr Pln.doc 11 1.0 INTRODUCTION 1.1 OBJECTIVES The purpose of this report is to prepare a comprehensive potable water system master planning document for the Oro Valley Water Utility (OVWU) system. The OVWU system has experienced significant growth and major policy changes since the last Water Master Plan reports were completed in 1995. .The original master plans consisted of a Canada Hills Water Company Master Planning Report and Rancho Vistoso Water Company Master Planning Report completed in April and May of 1995. These reports were developed when the water utility originally consisted of two private water companies. The Canada Hills Water Company and the Rancho Vistoso Water Company were both privately held and regulated by the Arizona Corporation Commission (ACC). The master plans were developed using guidelines and policies more in line with privately held water utilities. In addition, the developed facility hook-up fee was based solely upon ACC criteria. The OVWU is now operated under the direction of the Town of Oro Valley Mayor and Council. The OVWU has developed policies, guidelines, and infrastructure construction requirements of higher standards than under the private water companies. The two water companies are also now consolidated into one combined water utility with the exception of the Countryside service area. The water system hook-up fees must also be updated to provide adequate funding for future growth and maintain the Town's commitment to a high level of water service. The primary objectives of the OVWU master plan are as follows: • To define key issues and resolutions to major policy requirements. • To summarize regulatory requirements and constraints, and formalize OVWU general design requirements. • Update existing land uses,population, water demands, and existing infrastructure requirements. • Analyze the existing water system to summarize system deficiencies and required upgrades. • Develop future service area boundaries, population projections, and project water usage requirements for the future service area. • Develop master water planning infrastructure requirements for the year 2020. • Develop a program to implement the policies and procedures of the water utility. • Develop a capital improvement program for the recommended facilities including associated costs. 1.2 BACKGROUND The OVWU's existing water service area is comprised primarily of the two privately-held water companies which were acquired by the Town of Oro Valley in 1996. The Canada Hills Water Company WestLand Resources, Inc. Engineering and Environmental Consultants C.\MyFilesUobs\206.10\Dft Wtr Sys Mstr Pln.doc 1 (formerly the Foothills Water Company) lies adjacent and southerly to the Rancho Vistoso Water Company. The Canada Hills Water Company's original Certificate of Convenience and Necessity (CC&N) encompasses approximately six square miles in the lower Canada del Oro Valley (Exhibit 1). The Company's original certificated area includes property lying with the town limits of Oro Valley, as well as areas under the jurisdiction of Pima County and the Town of Marana. The Canada Hills Water Company consisted of two individual systems that are separated geographically by a distance of approximately four miles. The westernmost area is the Countryside system which serves approximately pp Y 2,000 customers. The other system is the easterly system serving approximately 6,800 customers. The majority of the total system is located within the Town of Oro Valley (Exhibit 3). The Countryside service area is located both within Pima County and within the Town of Marana limits. Some areas within the Canada Hills Water Company, which were built before fireflow requirements were enforced, are undersized 4- and 6-inch mains with little, if any, fireflow capacity. The Rancho Vistoso Water Company's original CC&N encompasses approximately 12 square miles and is located adjacent and northerly of the Canada Hills Water Company (Exhibit 2). The Rancho Vistoso Water Company was created in 1986 to serve the Rancho Vistoso community. With the exception of several subdivisions south of Tangerine Road,the Water Company was developed for the Rancho Vistoso Planned Area Development (PAD). This portion of the water system is relatively new with pipelines sized to meet fireflow and projected water system demand conditions. The Rancho Vistoso system currently services approximately 5,000 customers. During the last decade, both privately-held water companies experienced significant growth, along with the rest of the northwest area of Tucson. The extensive growth, coupled with the lack of financing capabilities of the private water companies, made it difficult for long-term planning and implementation of adequately sized facilities. The Canada Hills Water Company did not have a water master plan prior to 1995. The water company did not have any projections of future development or projected infrastructure requirements. This lack of future planning allowed facilities to be built which did not have adequate capacity for future development. These upgrades did not follow a logical order, nor provide a reliable, easily maintainable, or economical water system development. In addition, many developers who were the first to provide infrastructure for the system had to contribute large sums of capital for the facilities while developers which followed were able to use these facilities,without contributions. The Rancho Vistoso Water Company, although having many of these problems, did have a comprehensive water system plan for the Rancho Vistoso PAD. This water system plan incorporated the projected water system demands and fireflow requirements for the Rancho Vistoso PAD system. The water system mains which were developed in the Rancho Vistoso system were built and sized for future build-out conditions. The wells, boosters, and reservoirs were built in phases to handle the initial stages of development. WestLand Resources,Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\206.10\Dft\Vtr Sys Mstr Pln.doc 2 In order to overcome the shortfalls of the piece-meal development, the ACC began accepting a facility hook-up fee for private water companies. The hook-up fee was established by determining the ultimate facility requirements within the water company service area and dividing the cost for these facilities by the number of projected units. This method allowed a more equitable distribution of the cost of the future facilities. It also promoted the development of a water master plan to forecast the required water mains, wells, storage, and booster station facilities. The private water companies still lacked financing ability, and still required the first developer to build the initial facilities. In April 1995, the Canada Hills Water Company master planning report was prepared which summarized the existing facility requirements and projected the future water system requirements in the year 2015. A facility hook-up fee schedule was approved by the ACC for$575 per unit for a 5/8 x 3/4-inch meter. The Rancho Vistoso Water Company master planning report developed in May 1995 also projected all future development water uses and infrastructure required for the year 2015. In addition, the existing system deficiencies were analyzed, as well as future upgrades. The facility hook-up fee for the Rancho Vistoso area is$550 per unit for a 5/8 x 3/4-inch meter. On March 9, 1993, the Town of Oro Valley received voter approval and authorization to provide water service to the citizens of Oro Valley. In 1996, the Town of Oro Valley acquired both the Rancho Vistoso Water Company and the Canada Hills Water Company. The existing water master planning reports for both water companies were adopted by the Town Council in 1997. A connection fee for single family, residential, commercial, and industrial of$575 for a 5/8 x 3/4-inch meter, increasing to $28,750 for a 6- inch meter for the Canada Hills system. A fee of$550 for a 5/8 x 3/4-inch meter, increasing to $27,500 for a 6-inch meter for the Rancho Vistoso system(Table 1). In addition, an alternative water resources development fee of$300 for a 5/8-inch meter, increasing to $15,000 for a 6-inch meter was assessed for all future development in the water utility. This fee was to provide partial funding for providing untreated Central Arizona Project (CAP) water to recharge the aquifer within the OVWU service area. The original connection fees which were established by the private water companies,and later adopted by the Town Council, were based upon specified requirements of the ACC. Some of the restrictions included not allowing any bond financing costs or escalation of costs of the infrastructure throughout water system development. In addition, the facility infrastructure cost estimates were based upon lower standards for water system infrastructure to serve the initial developments. The Town has since adopted higher standards for water system infrastructure to obtain the required reliability, lower cost of maintenance, necessary monitoring requirements, and control requirements for a municipal system. While these requirements increase the initial cost estimates of the infrastructure required, they reduce the required maintenance and upgrade costs. This provides a better long-term economical system for the public. Due to these major changes in the water system infrastructure, service area requirements, policy statements, and infrastructure cost, an updated water system master plan is required for the OVWU. WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFilesUobs\206.10\Dft Wtr Sys Mstr Pln.doc 3 wr 1.3 PUBLIC OUTREACH PROGRAM The public outreach program for the master plan incorporates an extensive effort including meetings with the Mayor and Council, general public,and Town staff to include their ideas on the master water planning document. The public outreach program is an ongoing process throughout the water master plan, and is summarized and incorporated within the document. The entities included within the public outreach process include the Technical Advisory Committee (TAC), Water Utility Commission, and Town of Oro Valley Mayor and Council. The TAC coordinates with the Water Utility Commission (WUC), the Town Council, and public environments to facilitate public involvement during development of the water master plan. The TAC consists of seven members. The seven members consist of a member of the Council, a member of the WUC, a Utility staff member, a community development representative, a finance economic development representative, and two private citizens. The seven members and their affiliations are as follows: Constituent Member Council Member Liaison Fran LaSala Water Commissioner Nick Vale Utility Staff Member Shirley Seng Community Development Representative Jim Copus Finance/Economic Development Representative David Andrews Private Citizen Frank Butrico Private Citizen Bud Dooley The TAC identified and provided initial direction in developing key issues of the master plan. The following key issues will help provide guidance and direction of the major policy issues, and help define initial assumptions for the master planning process. WestLand Resources,Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\206.t0\Dft Wtr Sys Mstr Pin doc 4 2.0 SCOPE AND APPROACH 2.1 DEFINE KEY ISSUES The development of a Water Master Plan requires developing a strategic approach, and defining key issues and policies early in the master plan process. These key issues and policies, and their initial assumptions, are required to design the ultimate water system. The policies set within this section may dramatically affect the required water system layout, facility sizing, reliability, and costs of the required infrastructure. While the definitions and policies established within this section were initially formulated by the TAC, these policies will be re-evaluated throughout development of the water master plan. The water master plan infrastructure sizing and cost estimate sections, as well as comparisons with other local water companies of similar nature, will help in evaluating key issues and policies. 2.2 WATER SYSTEM PLANNING HORIZON The projected planning horizon for the population and water system demands will be 20 years. The plan will identify current conditions and population projections from the years 2000 to 2020. This timeframe is consistent with the existing and projected Pima Association of Governments (PAG) planning horizons and with the Oro Valley planning process. Population projections and demands on a per-zone basis will be provided for the existing conditions, year 2005, year 2010, and year 2020. These projections will allow for calculations of five-year capital improvement programs and phasing of the required future infrastructure. 2.3 LIMITS OF WATER SERVICE AREA The OVWU has several neighboring water service providers. Along the southern portions of the service area, the water utility is bordered by Metropolitan Water Improvement District and Tucson Water. Areas west of the service area, such as along the Thornydale corridor, are presently serviced by Tucson Water. The area north of the existing OVWU is state land and not in a water service area. Northeast of OVWU includes the Lago del Oro Water Company and Tucson Water service area. Directly east of OVWU are Oracle Road and the CDO Wash. Some of this area is not served by any water provider. Many factors contribute to the growth patterns of the OVWU, including constraints such as existing water company service areas, the Pima County boundary, national forest boundaries, and the projected town annexation boundaries. Exhibit 4 shows the Town of Oro Valley General Plan limits. The projected Town limits of Oro Valley generally extend from the Pinal County line on the north, Oracle Highway on the east, Orange Grove Road on the south, and Thornydale Road on the west(Exhibit 4). WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc Based upon meetings with legal counsel for the Town of Oro Valley, the general hierarchy of rights to provide water service for a municipal water utility is as follows: • The areas within the original CC&N and also within the Town of Oro Valley limits are considered absolute rights by the Town to serve. • In respect to the areas outside of the existing town limits, but within the original CC&N boundaries, the water utility will still have the right to serve any new or existing homes that are in the original CC&N boundary. Other private water companies cannot provide service within this area. If a municipality incorporates this area, they have the right to condemn the area within their new municipal limits,but must pay fair market value for the acquired service area rights. • In respect to the areas outside of the original CC&N and outside of the Town's existing municipal limits, these areas may be served on a first-come, first-serve basis. No private water company or municipality has absolute rights to serve these areas. The developer of the area essentially has the right to choose whichever water company is willing to serve them. • If the Town extends water mains beyond the original CC&N and town boundaries, another company may also extend lines within this same area and compete for providing water service. If another municipality incorporates within these areas after the Town's service mains have been extended, the Town still has the right to service these areas and expand the service system. If the same municipality obtains voter approval to provide water service, the Town may no longer have the right to serve additional homes beyond what we are serving at the time without the authority of the new municipality. The new municipality does have the right to condemn the Town's existing service area within their town limits and pay fair market value. Based upon the assumption that the OVWU may not initially extend into other previously existing water service areas, the projected limits of the water service area are generally Metropolitan Water Improvement District and Tucson Water service areas on the south,Thornydale on the west boundary, the Pinal County line on the north boundary, and Oracle Road on the east boundary. The exceptions include the acquisition of Oro Valley Water Improvement District No. 1, and acquiring portions of the Tucson Water system currently in Oro Valley town boundaries. For the purposes of this report, it is assumed the Countryside service area will continue to be a part of the OVWU service area(Exhibit 5). 2.4 WATER RESOURCES AND DEVELOPMENT The OVWU relies solely on groundwater supplies for its production water source. Since the inception of both Canada Hills Water Company and Rancho Vistoso Water Company, wells tapping the underground aquifer have continued to be developed to serve the growing population. The wellfields lie primarily WestLand Resources,Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206 I O\Dft\Vtr Sys Mstr Pin.doc 6 within the Big Wash basin in the Rancho Vistoso area and the CDO basin for Canada Hills area. The continued development of wells as a source of water for the water companies has historically provided a high-quality and reliable source of water. There are currently 23 existing wells within the big wash and CDO basin serving 6,600 acre-feet of water for the Oro Valley system. The Foothills Water Company and Rancho Vistoso Water Company originally entered into an agreement in 1979 with the City of Tucson through the Northwest Area Water Agreement. The Northwest Area Water Agreement allowed the two water companies to obtain an assured water supply (AWS) status through the Department of Water Resources (DWR) by way of Tucson Water eventually supplying treated CAP water to the northwest areas. In the years following the 1979 agreement, many changing factors, as well as a series of disagreements between the entities part of the Northwest Area Agreement, led to a stalemate on updating and continuing the agreement. The water distribution facilities required to transport the treated CAP to the northwest area were not constructed. In order to maintain their AWS status, the two water companies obtained independent hydrologic studies in August 1995. The two studies by Hydrologic Consultants showed both water companies had a 100-year AWS of groundwater for the projected water system development. Both water companies, and subsequently the OVWU, have since contracted with the CAGRD in order to maintain their AWS status. Since the acquisition of the two privately-owned water companies by the Town of Oro Valley, many concerns have been raised about the continued mining of groundwater in the Oro Valley area. These concerns include the long-term decrease of groundwater levels, the resulting local subsidence, degradation of water quality, increased pumping costs, and a program of building new deeper wells. For these reasons, as well as general public opinion, the Town of Oro Valley and other surrounding communities have been investigating other renewable water supplies for the northwest area. The entities involved in the cooperative effort include the Town of Oro Valley, the Metropolitan Water Improvement District, the Town of Marana, Pima County, City of Tucson, the Bureau of Reclamation (BOR), as well as others investigating several alternatives for developing renewable water supplies. The BOR spearheaded development of the Canada del Oro Recharge and Recovery Report completed in 1997 and is currently managing the SARWMS Feasibility study. This study is investigating several alternatives as originally developed in the Water Supply Alternatives for the Town of Oro Valley and adjacent water service areas. The alternative water sources being studied by the BOR include acquiring untreated CAP water and pumping the water easterly along the Moore Road alignment to recharge basins at the confluence of the Honey Bee and Big Wash area. A second alternative includes treating the CAP water in a new Regional Treatment Plant, and direct delivery to various turnout points within the existing system. These options, as well as several others, have been intensely studied for several years. Due to the complexity of the options being studied, the high projected costs, unknown funding mechanisms, and other political and institutional factors, it may be several years before a project is chosen and a schedule is developed. WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr P1n.doc 7 The goal of the Water System Master Plan is to provide a distribution system which has the flexibility to accept water from any of the water source alternatives currently being studied. The effects of the differing alternative water resources can be generally broken down into two scenarios. The first scenario, which is the existing condition, is a"distributed system" of supply. This is a system of water supply wells which contribute small volumes of water spaced throughout the distribution system. This type of system applies to a system of continuing groundwater withdrawal by wells and also a system whereby recharge of the groundwater system is provided by recharge basins, and recovery by the existing wells. The well system would be a recovery system and would continue to be developed within the Big Wash and CDO Wash basins. The second method of obtaining source water supplies is by direct tapping stations into the main distribution system through point water sources. These point sources can be supplied from a remote water treatment plant or through a distribution system provided from the Tucson Water system. These point sources of treated water would typically be provided by large-diameter transmission mains, either along the Moore Road corridor from a new CAP treatment plant or from the Lambert Lane alignment as provided by the Tucson Water system. These large diameter mains would typically traverse through the water supply system and supply the OVWU system by major tapping stations. The Water System Master Plan and the resulting infrastructure analysis must be designed to be flexible enough to incorporate either of the two methods of source development. This will allow the Town the flexibility, with minor infrastructure adjustments, to accept source water from whichever concept alternative water resource is implemented. 2.5 IRRIGATION/TURF WATER POLICY The OVWU currently serves four, 18-hole golf courses and one, 9-hole golf course. The Rancho Vistoso area currently serves the Sun City Vistoso and Highland golf courses. The Canada Hills area currently serve two, 18-hole golf courses within the Canada Hills Country Club and one, 9-hole golf course within the El Conquistador Resort. Three to four additional 18-hole golf courses within the Rancho Vistoso area are projected over the next five years. Oro Valley Country Club Golf Course is not served by the Town's water system, but does extract groundwater beneath the Town's service area. Oro Valley Country Club has their own wells and Type II rights for service. A Reclaimed Master Plan was developed for the Rancho Vistoso PAD to serve all of the golf courses within Rancho Vistoso and the two Canada Hills golf courses by an extension of the Tucson Water Reclamation System. It was anticipated that a new 24-inch main along the Moore Road alignment would be extended throughout the OVWU system to serve all existing and future golf courses through this distribution system directly with reclaimed water. Since the original Reclaimed Master Plan was developed, several new alternative sources for reclaimed water have arisen. The alternative sources WestLand Resources,Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.l0\Dft Wtr Sys Mstr Pln.doc 8 include a new Wastewater Reclamation Facility serving the Town of Oro Valley, and a new Pima County Reclamation Facility and Distribution System which would be extended to the northwest area including serving the golf courses within Oro Valley. In addition to the above concepts for serving reclaimed water to the golf courses, a fourth concept of serving direct untreated CAP water through a pump station at Tangerine Road and Interstate 10, and a new transmission main along the Moore Road alignment is being evaluated. This option has the disadvantage of the untreated CAP usage being counted against the utilities gallons per capita per day (GPCD). The effluent and CAP distribution concepts have been analyzed in other reports for initial capital cost, operations and maintenance (O&M) costs, effects on per capita consumption, reliability, and other institutional factors. When further information on the alternatives become available, an alternative source of water for turf uses will be chosen and developed. The goal of the Water Master Plan will be to provide the flexibility within the water system infrastructure to adapt to the varying conditions of removing the golf courses from the potable water system. For the purposes of this report, it is estimated that all golf courses, with the exception of the 9-hole El Conquistador Golf Course, will be served by a separate reclaimed water or untreated CAP water distribution system within the next five years. The domestic water system must be designed to continue to serve the existing and future golf courses until the new reclaimed water system is in place. The domestic system shall be designed to operate reliably during the period it is serving the golf courses, as well as efficiently using all the facilities built after the golf courses are removed from the system. The wells, booster stations, and reservoirs shall be designed, constructed, and phased into the system to eliminate major operational changes during the conversion of the golf courses to alternative water supplies, and to avoid large redundant facilities after the golf courses are removed from the system. 2.6 FIREFLOW POLICY The OVWU is currently served by three fire companies - Rural Metro Corporation, Golder Ranch Fire District, and Northwest Fire District. Rural Metro serves approximately 75 percent of the Town of Oro Valley limits and Golder Ranch Fire District serves the remaining 25 percent of the Town limits. The Countryside area, which is outside the Town of Oro Valley limits is served by Northwest Fire District. The Town of Oro Valley has now adopted the 1997 Uniform Fire Code. The 1997 Uniform Fire Code includes tables and formulas for calculating the required fireflow for residential and commercial facilities. The fireflow requirements for residential facilities are typically based upon the development density, square footage of the homes, and whether the structures are sprinklered. Fireflow requirements for homes typically vary from 750 gallons per minute (gpm) to 1,500 gpm depending upon the above conditions. The typical residential subdivision will have a fireflow requirement of 1,000 gpm for a two-hour duration. WestLand Resources, Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pin.doc 9 In addition, other requirements include fire hydrants with a minimum spacing of 250 feet between residential structures and the nearest fire hydrant. Commercial facility fireflow requirements also vary depending upon the square footage of the commercial building, occupancy type, building material type, exposure distance to other buildings, and whether the structure is sprinklered. Typical commercial facilities within the Oro Valley area will have fireflow requirements from 1,500 to 2,500 gpm for two-or three-hour durations. The fire hydrant spacing is generally the same as residential structures. Many older subdivisions currently exist and service areas which were developed prior to the enforcement of the Uniform Fire Code. These areas do not have the required fireflow capacity and duration as currently required by the Uniform Fire Code. Per the Code, these areas are grandfathered and not required to be retrofitted to meet the Code standards. The lack of fireflow capacity varies greatly in these older areas. Some areas include 4-inch mains with essentially no fireflow capacity. Other areas may have much larger mains and existing fire hydrants which may slightly lack capacity and duration of flow. The cost of upgrading areas with little or no fireflow capacity can be very expensive and disruptive to the surrounding neighborhoods. There are generally two considerations to providing adequate fireflow to a neighborhood. The two considerations include offsite requirements such as volume of fireflow storage available in the reservoirs, adequately designed pressure zones, and the size of offsite transmission mains. The second factor is the internal distribution system within the neighborhood, including main sizes, adequate looping, and fire hydrant placements. The suggested policy for the OVWU would be to develop adequately sized reservoirs, properly designed pressure zones, and water transmission mains sized to provide adequate fireflow throughout the water utility system. The required infrastructure for the interior subdivisions, including all replacement mains, pavement replacement, looped systems, and new fire hydrants, would be developed and financed through local neighborhood improvement districts. The existing policy for the OVWU review process includes having all subdivision and water extension plans reviewed and approved by the appropriate Fire Department. The Fire Departments typically review fire hydrant locations, spacing, and fireflow capacity requirements. The Fire Departments also review street layouts, adequate access for fire trucks, and turnaround capacities for the trucks. The design engineer of the water project is required to provide design calculations and improvement plans for the facilities needed to provide the required fireflow to the development. These plans are then reviewed and approved by the OVWU prior to construction. The design and development policy for the water master plan will include looking at expected fireflow requirements within prescribed areas depending upon the projected land use zoning. These fireflow requirements will be incorporated into each zone of the water system for main infrastructure sizing and WestLand Resources, Inc. Engineering and Environmental Consultants C.\,MyFiles\Jobs\206.10\Dft\Vtr Sys Mstr Pln.doc 10 design. The master plan design criteria will include reservoir sizing for the maximum fireflow and duration required for the zone, the transmission main sizes and design to provide a minimum of 20 pounds per square inch (psi) residual pressure within the system at fireflow conditions, plus peak day demands. This design criteria will be incorporated into both the existing system upgrade requirements and the future infrastructure system layout. 2.7 STORAGE CAPACITY REQUIREMENTS Reservoir storage capacity is a highly critical element in the design and operation of water systems. Reservoir storage is used primarily to accommodate hourly fluctuations and demand, peak-day demand fluctuations, fireflow requirements, and emergency reserve storage. Each of these requirements added together form the required storage capacity for each zone. Current Arizona Department of Environmental Quality (ADEQ) requirements typically require 1.0 times the average daily demand (ADD) plus fireflow requirements to be the minimum storage capacity per zone. Under certain circumstances, in service areas with excess well capacities, the storage capacity may be lowered. The current storage requirement for the OVWU is providing usable storage volume for each zone of at least equal to 23 percent of peak-day use, plus an additional 25 percent of peak-day use for reserve storage. This volume will be added to the storage volume required for fireflow. This formula is essentially equal to 1.0 times the ADD plus fireflow. Other large municipalities have storage requirements ranging from 1.0 to 2.0 ADD plus fireflow for their storage capacity requirements. The advantages of having additional storage includes more operational flexibility, reduced cycling time for production wells and booster stations, lower pressure fluctuations within the water system, greater reliability in case of power outages or equipment failure, and reduction in well capacity requirements for larger reservoir storage volumes. The disadvantage of a larger storage capacity requirement is the additional cost of the larger reservoirs, aesthetics of larger reservoirs, and additional land area required for reservoir sites. The recommended storage capacity requirements for the OVWU is 1.25 ADD plus fireflow requirements. This volume of water will provide for the hourly system fluctuations, peak day of peak month use, reserve storage, and fireflow requirements. This criteria is based upon maintaining a well system capable of providing peak-day demand for the entire system with the largest well out of service. 2.8 SYSTEM PRESSURE REQUIREMENTS The original Canada Hills Water System design criteria included zone boundaries located at 100-foot intervals (Table 2). The zone boundaries high-water elevations are evenly spaced at 100-foot intervals and closely match the Tucson Water zone boundaries. The original Rancho Vistoso Water system design criteria developed zone boundaries at 105-foot intervals which equal the Tucson Water zone boundaries. WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pin.doc i 1 For the purpose of this report, the OVWU will adopt the Tucson Water zone boundary delineations and high-water elevations for the entire combined water service area(Exhibit 3). Using this design criteria, typical static pressure fluctuations within the system will vary from approximately 40 psi at the top of the zone to 87 psi at the bottom of the zone. The above static pressures will vary with daily demand fluctuations and fireflow conditions. Under fireflow conditions at periods of peak-day demand, the residual pressure within the system should not drop below 20 psi. System pressures under peak-day conditions should not drop below 35 psi anywhere within the system. These pressures and zone boundary elevations are based upon the finished floor elevations of the homes or the elevation of the highest floor of a multi-level building. The Uniform Plumbing Code limits the highest pressure serving a customer to be 80 psi. All pressures above 80 psi within the water delivery system shall be reduced by individual pressure reducing valves (PRV) located at the building service. These individual PRVs are normally the responsibility of the builder. In foothills areas where unusually steep terrains or areas where highly variable elevations occur, zone boundaries may be allowed to be spaced at approximately 155-foot intervals. Under these conditions, static water pressures may be allowed to approach 115 psi within the water transmission system. Pressure fluctuations in the water system are highly dependent upon the water system design. Two methods of system pressure control are typically used for system design and control. The preferred method is a floating reservoir system with the water surface of the reservoir set at the high water elevation of the system. This allows the homes within the zone boundary to be served directly from the reservoir by gravity and the system pressure regulated by the reservoir elevation. This method provides a highly reliable system with very low pressure fluctuations. The pressure fluctuations under static conditions may vary as little 5 psi. The system will also continue to operate during power outages using the remaining water in the reservoir system. The second method of pressure control is based upon systems controlled by a booster station. Under these conditions, the pressure is regulated by a hydro-pneumatic tank controlling the booster pumps. The booster pumps turn on and off based upon the prescribed pressure ranges in the hydro-pneumatic tank. This method of control will typically see pressure ranges in the system varying by 20 psi between the pump cycles throughout the day. In addition to the higher pressure fluctuations, unless backup generators are provided, the water service will be disrupted during power outages. The above pressure fluctuations shall be incorporated into the design criteria for designing the zone boundaries, booster stations, and reservoir systems. 2.9 WATER QUALITY REGULATIONS Water quality for the OVWU system is regulated by both federal and state standards. Federal standards include the Safe Drinking Water Act and the Safe Drinking Water Act Reauthorization. The Safe Drinking Water Act establishes minimum water quality standards for health and aesthetic water quality WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.t0\Dft Wtr Sys Mstr Ptn.doc 1 2 considerations. The Safe Drinking Water Act identifies enforceable maximum contaminant levels (MCLs) for 25 health-related constituents and non-enforceable secondary maximum contaminant levels (SMCLs) for 13 aesthetic-related constituents. The SMCLs are not federally enforceable, but are intended as guidance to the states. At the state level, the Arizona Environmental Quality Act establishes water quality criteria for water treatment, storage, and distribution. ADEQ was set up to administer the act and has adopted the federal regulations for drinking water quality. It is the policy of the OVWU to meet or exceed requirements of the ADEQ for potable water. The OVWU regularly monitors MCLs and SMCLs based upon the requirements of the Safe Drinking Water Act. The existing water system currently pumps groundwater directly to the distribution system without chlorination. It is anticipated that chlorination will be a requirement for all regulated water utility systems by the year 2000. It is the recommended policy of the OVWU to provide chlorination facilities at the wellhead of each of the utility's production wells to maintain the required residual chlorination within the system. It is possible that remote chlorination may be required in the upper reservoir system if required to maintain residual chlorine levels. It will also be the policy of the water company to maintain the required design standards for equipment, pipe materials, and coatings for facilities which have chlorination facilities. 2.10 RELIABILITY EMERGENCY PLAN It is the requirement of ADEQ that each community water system develop an Emergency Operations Plan. The Emergency Operations Plan shall detail the steps that a water system will take to assure continuation of service in the following emergency situations: 1. Loss of source of a water supply. 2. Loss of supply due to major component failure. 3. Damage to power supply equipment or loss of power. 4. Contamination of water in the distribution system as a result of backflow. 5. Collapse of reservoirs or reservoir roofs or pump-house structures. 6. Breaks in transmission or distribution lines. 7. Chemical or micro-biological contamination of the water supply. The OVWU has developed an Emergency Operations Plan for the Countryside system. This emergency plan addresses the requirements of ADEQ including the provisions for alternative water sources during an emergency, notification of regulatory agencies and media, disinfection and testing of the systems once restored, identification of critical system components, and critical spare parts inventory and staff training in emergency response procedures. WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc I 3 The water system master planning process and the resulting water system design criteria will have a large affect on the overall system reliability, emergency operation procedures, and development of the emergency operation plan. The following design criteria which effects the system reliability and emergency operation procedures will be summarized in this section and incorporated in the water system design criteria. • Floating storage systems: It is recommended that the policy of the OVWU is to use floating reservoir systems for each zone wherever possible. The exceptions to this design criteria may be isolated zones in the upper portions of the service area where reservoir locations are not available. A floating zone storage system provides a highly reliable water delivery system which operates during power outages or failures. • Looped water transmission systems: It should be the policy of the OVWU to require looped water transmission and distribution systems for the water main grid system and for individual subdivisions. Review criteria will include requiring developments to stub out to adjacent property lines and provide a looped system for internal distribution systems. In addition, appropriate valving at the recommended locations and intervals will be required to isolate smaller sections of main during breakages and reduce the number of residences out of service. • Backup generators: It shall be the policy of the OVWU to provide onsite backup generators at booster stations providing pressure service to areas which are not connected to a floating storage system. These backup generators will be equipped with automatic transfer switches whereby if the power is interrupted, the backup generator will automatically transfer over and allow the booster station to continue operation. It should also be the policy of the water utility to provide manual transfer switches and external plugs for a portable backup generator in case of prolonged power outages. This will allow the water company to move water throughout the system as required through the power outage. The manual transfer switches and external plugs should be installed on all new facilities and retrofitted on older facilities. These facilities should include wells and booster stations which need to be operated intermittently during a prolonged power outage to provide water to the reservoir system. A minimum of two potable backup generators of adequate size to handle the largest facility shall be available to water company personnel to respond to these emergencies. • Telemetry monitoring system: The OVWU has begun retrofitting the existing system to incorporate a telemetry operation and monitoring system. This radio-telemetry system provides radio communication between all of the water facilities and a central control station at the water company office. The telemetry system allows an operator within the OVWU office to monitor and control the operation of the system. The telemetry-control system monitors water level elevations of reservoirs, water pressures, air levels, pump on/off conditions, and system failures. In the event of a failure, the system will automatically dial a beeper to immediately notify water company personnel of the failure. Water company personnel will access the telemetry system to find the location and the mode of WestLand Resources,Inc. Engineering and Environmental Consultants C.\MyFilesUobs\206.10\Dft Wtr Sys Mstr Pln.doc 14 • failure. The system allows water company personnel immediate notification of a failure before the reservoirs run out of water and disrupts customer service. This allows the water utility to take corrective actions before customer service interruptions. • Water quality control: It is the policy of the OVWU to begin wellhead chlorination of the system and maintain adequate residual chlorine concentrations throughout the water system. This policy will help alleviate bacteriological contamination which may occur through airborne contamination of reservoirs or stagnant water lines and transmission mains. • • Valve and pump facility maintenance: It is the policy of the OVWU to develop a valve maintenance and exercising program. This program shall provide regularly scheduled maintenance on control valves, pumping units, motors, and other critical components of a water distribution system. In addition, a regular valve exercising program shall be provided in order to exercise and verify the operation of all isolation valves within the system. This will ensure that existing valves are exposed and in working order to properly isolate the system in the event of an emergency. 2.11 LAND ACQUISITION POLICY The water system master planning report will serve to provide locations and sizes for future wells, reservoirs, booster stations, and major transmission mains to serve the water service area buildout. These facilities will be generally located on water system maps and general estimated sizes for land acquisition purposes will be specified for each site. Many factors and constraints will be required to determine the final location for each site. These factors include the proximity to existing water transmission mains, the proximity to 3-phase power, access to local public streets, specific elevation requirements for floating reservoirs, hydrologic requirements for well sites, noise and buffer requirements for booster station and wells, aesthetic screening requirements for aboveground facilities, and the cost of acquiring the land and/or availability of other preferable sites. Experience has demonstrated that the early identification of land and rights-of-way needs for future use by the municipality and its utilities can results in substantial acquisition savings when compared to "urgent need" acquisitions. To ensure the future economic well being of the OVWU, it is recommended that the Town retain trained and knowledgeable staff members to participate in the planning and plan review process to identify and assist in the acquisition of land and rights-of-way for current and future needs of the water utility. An internal tracking and monitoring system within the Town of Oro Valley Planning and Review Process is required to alert Town staff early in the development process of project reviews. This mechanism will alert Town staff and developers early in the planning process that water utility facilities are required in a specified location. Site acquisition, concept planning and layouts, and water facilities design may be planned along with the planning of the surrounding development. Land acquisition for water facilities WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc 15 should be included in all planning review checklists and pre-application meetings for upcoming plan reviews. It is also essential to locate and acquire land for future weilsites, boosters, reservoirs, and existing facility expansions prior to the actual facility development. This will allow the water utility to be assured that the land is available when needed and also help in informing surrounding landowners of the future uses. This will also avoid the water utilities existing facilities being land-locked and paying higher prices for land acquisition under duress conditions. 2.12 EXISTING SYSTEM UPGRADE POLICY The water utility master plan will develop the system design criteria to guide the utility in designing the water facilities. The system design criteria will include methods for demand calculations, peaking factors, water supply requirements, the number and capacity of wells required, reservoir storage requirements, booster station capacity requirements, emergency backup systems, distribution systems sizing, and water system grid requirements. An evaluation of the existing system will be performed during the initial stages of the master planning process. It is anticipated that the existing water system will not meet the system design criteria as adopted by the OVWU. The master plan will identify the areas of the existing water system where deficiencies exist. The master plan will specify the requested new facilities and/or facility upgrades to bring the existing system in compliance with the design criteria. These facilities may include additional wells, booster station upgrades, reservoir capacity additions, and transmission main augmentations. The projected cost estimates will be provided for these facilities, and a priority schedule and timeline will be provided for the infrastructure development. It is anticipated that the cost of upgrading the existing system will be financed by the water utility. The system upgrades will be limited to the existing water facilities and the spine water distribution mains. Existing system upgrades will not include undersized mains or distribution systems within local subdivisions or smaller distribution systems. 2.13 OVERSIZED REFUND AND CREDIT POLICY The water system master planning process will define the locations of the major water facilities and major water distribution mains. The major water distribution mains will generally be located within the right- of-ways of major streets and the collector streets within the Town. The water mains will be sized to deliver adequate flows to meet peak daily demand plus fireflow, or peak hourly demand, whichever is greater. These water main sizes will generally be larger than required to serve a single development. During the extension of water main facilities to serve a development, it is preferable to initially construct the ultimate size water main rather than building smaller mains and later constructing parallel mains for future developments. Phasing of main distributions using parallel mains is typically uneconomical and WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc 16 many times unattainable due to restrictions and availability of existing right-of-way corridors. It is, therefore,the policy of the OVWU to build the ultimate watermain facilities for all watermain extensions. The OVWU code has an existing oversizing refund policy whereby the initial development installs the ultimate-sized water main at their cost. The Town will refund the oversizing cost of the transmission main by reimbursing the developer for the material cost difference between what was required to deliver water to the subject property and what was required to enhance the water system for future growth. The oversized refunding credit policy will typically be used for water distribution and transmission mains only. Water system facilities such as wells, boosters, and reservoirs will typically be constructed by the water utility using other funding mechanisms. 2.14 WATER SYSTEM DEVELOPMENT AND FINANCING Water system development procedures and system financing is one of the most critical and important policies to be developed during the water system master planning process. The water system development requirements have been divided into two primary components. The components include: 1) the existing system upgrade requirements, and 2) water system expansion for growth and expansion of service areas. The water master plan will define the specific facility requirements to bring the existing water system into compliance with its adopted water system criteria, system reliability requirements, augmentations, and for providing the currently required fireflow. These facilities will be identified, and opinions of probable cost provided for each facility. The proposed policy for the OVWU is to develop a schedule for implementation and construction of the upgrade requirements as identified in the report. These improvements are to be constructed over the next five years. In order to design and construct these improvements, portions of the financing improvements will most likely be required through long-term debt and payback through the water rates. The upgraded facilities that are required include upgrades to existing storage, booster stations, new wells, and transmission mains. The required facilities will have a minimum useful life of 20 years and greater, but will require high initial cash outflows in the first five years. Since these facilities primarily benefit the existing rate users, long-term debt will provide a mechanism for obtaining the initial cash flow requirements and spreading the payments over a 20-year period. This method of financing more closely matches the facilities useful life and provides the ability to pay off the bonds through projected water rates. The second primary category of water system improvements includes water system expansion for system growth, and water system service area expansion. The policy of the OVWU is to maintain that growth pays for itself. All costs of the new facilities which are required for new system development will be paid for by the future development which it benefits. Water system development fees will be assessed to all WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft WVtr Sys Mstr Pln.doc 17 +�w future developments on a per-meter hook-up, either based upon meter sizes or water demand requirements. The water system development fee will include all costs associated with providing the facilities for serving the new development. These costs will include the design and construction cost for the required reservoirs,booster stations, production wells, transmission mains, AWS costs, administrative costs, and costs associated with inflationary cost escalations. The financing of growth-related projects is a complex and sometimes controversial issue. As discussed previously, OVWU along with the preceeding private water companies, have required developer financing to up-front major capital improvements for system expansion and growth. The resultant lack of system planning, implementation, and many times unfair cost burden distributions, has resulted in the need to re-evaluate the method for financing and implementation of growth-related improvements. With the system development fee available as a tool for providing the long-term required capital, the primary question is who provides the up-front capital for the initial construction of the facilities. The first option is that OVWU sells G.O. or revenue bonds for the anticipated water utility infrastructure and repays the bonds using system development fee revenues. The second option is to continue to require the developer to pay the up-front costs of the ultimate facilities required for the area before his project may be built. His up-front cost will be repaid by the system development fees contributed by his project, and those surrounding projects, until his up-front cost is paid back. The third and recommended option is a combination where both OVWU provides bond financing and the developer also contributes some up- front capital to the construction project. The key issues in developing a financing mechanism for the growth-related projects are as follows: Planning of System Improvements In order to meet the requirements of the OVWU design guidelines and ADEQ design requirements, the facilities required to serve a project must typically be built and operating before the project can be connected for domestic or commercial usage. The system development fee is typically paid at time of meter hookup. When the customer is hooked up for service, the wells, reservoirs, booster station, and fireflow requirements must be in place and operating before service can be provided. This necessitates a large outflow of initial capital to build these facilities before the first dollar of system development fees is paid back to the utility. In addition, based upon the project buildout, many years may pass before the system development fees are paid back to the utility in full. This necessitates the cost of financing be included in the system development fee. Abilities to Finance Up-front Cost Based upon the water system master plan, it is in the water utility's interest to build adequately sized facilities of a greater capacity to provide the water system requirements for a large area of the system over many years in the future. Therefore, the facilities that are required to be built generally are much larger than for an individual development. The developer of a project will typically not have the capital WestLand Resources,Inc. Engineering and Environmental Consultants C:\MyFilesUobs\?06.10\Dft Wtr Sys Mstr Pln.doc 1 8 financing available to up-front a large capital outlay to construct the water facility system as required by the Town. The OVWU, with the ability to sell bonds at lower capitalization rates, is typically in a better position to provide the large up-front capital to pay the initial water system development costs. Control of System Improvements In the past, many improvements have been designed and constructed by the developers rather than being controlled by the Town's utility. The construction of wells, boosters, reservoirs, and major transmission mains should be uniform in design for both general long-term reliability and for maintenance. In order to obtain this, this mandates the OVWU maintain control the design and construction of all large facility improvements. Project/Developer Accountability It is important in prioritizing and approving projects to assure, as great a degree as possible, that development will occur in prescribed areas before the Town funds are committed to serve a specific area or project. This may require some accountability or contribution by the developer that his project will be built, and subsequent development fees will be paid back, before bond money is spent building facilities to serve an area or a specific project. Project Prioritization Project priorities shall be established based upon meeting system design requirements, and in addition, providing the greatest return of system development fees. Priority and project approval guidelines shall be established and used in developing the capital improvement plan for growth-related projects. Bond Repayment Requirements A detailed analysis shall be required based upon population and growth projections to balance the up- front capital financing of projects, and repayment of the bonds through system development fees. It is important that limits be set on the bonds sold to assure that the bonds shall be repaid by the system development fee revenues without being supplemented by the water rate revenues or the Town's general fund. This may require developer financing to supplement the bonds in cases where requirements for up- front capital is greater than the projected system development fees for bond repayments. WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFilesUobs\206.l0\Dft Wtr Sys Mstr Pin.doc 1 9 art Supplemental Developer Contributions A system should be set up where developers are required to provide a portion of the up-front capital financing. The developer's contribution may be limited to any offsite transmission main extensions to their property while the Town's contribution be limited to facility improvements such as wells, boosters, and reservoir facilities. Capital Improvement Program (CIP) Flexibility The projected budgets in the capital improvement program for growth-related facilities must remain flexible and able to evolve within each fiscal year in order to meet the constantly changing growth scenarios. The total CIP budget for the fiscal year, however, must continue to meet the maximum bond expenditures which can be repaid by system development fee revenues. Separate Fund and Accounting System A separate development fee fund must be established to account for all development fees and growth- related expenditures as delineated in the potable water system master plan. Financing Summary It is important in defining and implementing a system development fee to address the previously- described key issues and provide the greatest economic benefit to the existing and future customers of the water utility. This program must also result in a well-planned and an efficient water system which can be constructed in an orderly fashion and properly timed to the development needs. With the system development fee revenues available, OVWU should sell bonds to provide the up-front capital required for building all reservoirs, booster stations, wells, and major facilities for the systematic growth of the water company. Project developers should provide up-front capital to construct water system transmission main extensions to their property and in some cases, additional capital for other water system improvements if the water utility funds are not available at the time. Water system development fees will be used first for repayment of the Town's bonds, and as excess water system development fees are available, will be used to pay back developers for their up-front contributions to the system improvements. WestLand Resources, Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pin.doe 20 3.0 REGULATORY REQUIREMENTS AND CONSTRAINTS The planning and operation of a water system is subject to a number of Federal, State and local laws, regulations, and rules. Many of these standards, such as those established by the Safe Drinking Water Act (SDWA) and the SDWA Amendments, have been promulgated by the federal government, and subsequently adopted by the State of Arizona, in the form of the Arizona Revised Statutes. Other requirements, such as those contained in the Arizona Groundwater Management Act and the OVWU Code, have been developed by the State of Arizona or local governments, to deal with issues specific to Arizona. This section presents a summary of regulatory requirements and constraints which impact the operation of the OVWU. 3.1 FEDERAL LAWS 3.1.1 Safe Drinking Water Act (SDWA) The Federal government has established national regulations for water quality in potable water supply and distribution systems in the form of the Federal Safe Drinking Water Act. The SDWA was signed into law in December 1974, and was amended in 1986 and 1996. The SDWA required EPA to establish legally enforceable MCLs for a number of contaminants. Currently MCLs have been promulgated for inorganic chemicals such as arsenic, cyanide, lead and copper; organic chemicals in the classifications of volatile organic chemicals, pesticides/herbicides/PCBs, synthetic organic chemicals, and treatment chemicals and byproducts; radiological contaminants; turbidity (for surface waters and groundwater influenced by surface waters); and microbiological contaminants. EPA also established non-enforceable SMCLs, relating to contaminants which may adversely affect the aesthetic quality of drinking water. The authority to enforce these standards has been delegated to the State of Arizona. Water quality programs are overseen by ADEQ. The EPA is in the process of developing a number of new rules as part of the SDWA. The groundwater rule, currently under development, will specify the appropriate use of disinfection for groundwater systems, and address other components of groundwater systems to assure public health protection. The proposed groundwater rule is expected to be prepared in Spring 1999, with a final rule due by November 2000. The use of disinfection for groundwater sources will also bring those sources under the requirements of the disinfectants and disinfection by-products rule. This rule provides maximum levels for disinfectants and disinfection byproduct in all potable water sources. The EPA is also in the process of developing new standards for levels of arsenic in drinking water. WestLand Resources, Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\?06.10\Dft Wtr Sys Mstr Pln.doc 21 3.2. STATE LAWS AND REGULATIONS The Arizona Revised Statutes (ARS)Titles 45 and 49 are those statutes developed by the State of Arizona which deal with subjects most relevant to the operation of a municipal water system. ARS Title 45 describes the duties and programs of ADWR. ARS Title 49 describes water quality control, and is the primary regulation for potable water supplies. Title 49 designates the ADEQ as the agency responsible for ensuring the health and safety of public water supplies. The Arizona Adminstrative Code (AAC) consists of those rules and regulations used to expand and define the provisions of the ARS. AAC Title 18 relates to Environmental Quality, and covers the subjects of Safe Drinking Water and Water Quality Standards. 3.2.1 Arizona Department of Environmental Quality (ADEQ) The Environmental Quality Act was established in 1986 with the purpose of describing the responsibilities of ADEQ. Broad authorities were established for the management, control, and regulation of sources which may impact water quality, including point and non-point sources of pollution into surface and groundwaters, regulated agricultural activities, underground injection control, and to the activities which may impact aquifer water quality. An aquifer protection permit program was established. ADEQ was required to adopt numerous standards for surface waters and aquifer water quality, and define aquifer boundaries and establish aquifer classification procedures. 3.2.1.1 Regulatory Storage Requirements The mission of the Arizona Safe Drinking Water Program is to ensure the delivery of safe drinking water to users of public water systems through regulatory oversight, technical assistance and public education in facility planning, design, construction, operation and compliance monitoring, and to preserve and protect drinking water sources. The Drinking Water Program is federally mandated to ensure safe drinking water supplies for the public. Arizona has primacy for this program and, therefore enforces the federal regulations in addition to State requirements. The Wellhead Protection Program is incorporated in the Drinking Water Program and involves the promotion of voluntary programs in communities aimed at protecting aquifers for drinking water use. As a result of requirements of the Environmental Quality Act, ADEQ has adopted Arizona Primary Maximum Contaminant Levels (Pri-MCLs) for the same group of regulated contaminants as covered by the SDWA. The numerical standards for the Arizona Pri-MCLs meet or exceed those MCLs compiled by USEPA for the SDWA. ADEQ has provided a number of guidelines for water system design, to assist water suppliers in constructing a water system to provide safe, reliable water service. The following information has been summarized from the AAC, Engineering Bulletin#10, and various ADEQ guidance publications. WestLand Resources,Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc 22 3.2.1.2 Pressure Requirements Pressure extremes in water systems result in potential for contamination to enter the system. Low pressures may allow polluted fluids to be forced into the system. High pressures may cause ruptures or breaks. Normal working pressure in the distribution system should not be less than 40 psi. The system shall be designed to maintain a minimum pressure of 20 psi at ground level at all points in the distribution system under all conditions of flow. This is generally understood to mean that the minimum residual pressure must be 20 psi at the most remote hydrant, during a flow condition of peak day plus fire flow. Maximum pressures of as much as 100 pounds per square inch can be allowed in small, low-lying areas not subject to high flow rates and surge pressure. The Uniform Plumbing Code (UPC) limits the water pressure within the individual property owner's plumbing to 15 to 80 psi. Boosting or regulating the pressure from the meter to the customer is typically the responsibility of the customer. 3.2.1.3 Regulatory Storage Requirements The minimum storage capacity for a community water system serving residential or school customers shall be equal to the average daily demand during the peak month of the year. Storage capacity may be based on existing consumption and phased as the water system expands. OVWU has adopted a more stringent storage requirement which will meet or exceed the minimum requirement by ADEQ. The storage requirement consists of maintaining a minimum of 1.25 annual average daily demand, plus fireflow requirements. The storage must be provided in the zone where the usage is required or may be readily transferred to the zone of use. This storage requirement is within the normal requirements of municipalities with similar demand requirements. This storage will provide the operational flexibility, system reliability, and reduced operational costs desired by the OVWU. 3.2.1.4 Backflow Requirements The AAC requires that water suppliers protect the public water system for contamination caused by backflow through unprotected cross-connections by requiring the installation and periodic testing of backflow prevention assemblies. The law required that a backflow preventer be installed whenever there is a possibility that cross-connections may occur, or that any foreign substance may enter the water system. Such substances include chemicals, chemical or biological process waters, water from public water supplies which has deteriorated in sanitary quality, and water which has entered fire sprinkler systems. Backflow prevention assemblies must be tested at least annually, and the test records must be kept for a period of at least three years. 3.2.1.5 Emergency Operating Plan A water supply emergency operating plan is required as part of the EPA Wellhead Protection Program (WHP) established under the 1986 amendments to the SDWA. The AAC requires that each community WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc 23 water system shall develop an emergency operating plan, and keep the plan in an easily accessible location. The ADEQ has prepared a Drinking Water Emergency Operations Plan Checklist, to provide specific guidance regarding the information to be included in the emergency plan. In general, the emergency plan should address the procedures to be implemented in response to an emergency situation which could result in loss or contamination of drinking water supplies, and to continue providing drinking water that meets compliance requirements during potential emergency situations involving the water system. The document should provide an overview of the water system, including system mapping, establish personnel duties, identify emergency contacts and notification procedures, and delineate emergency operating procedures. The emergency plan should also provide for alternate sources of water, and identify critical system components and spare parts. 3.2.2 Arizona Department of Water Resources (ADWR) ADWR was created in 1980 to administer state water laws, except those relating to water quality. The ADWR also explores methods of augmenting water supplies to meet future demands, and works to develop public policies that promote conservation and equitable distribution of water. The ADWR oversees the use of surface and groundwater resources under state jurisdiction and negotiates with external political entities to protect and augment Arizona's water supply. 3.2.2.1 Groundwater Management Code To address groundwater depletion in the state's most populous areas, the state legislature created the Groundwater Management Code in 1980 and directed ADWR to implement it. The objectives of the Code are to control severe groundwater overdraft, provide the means for effectively allocating Arizona's groundwater resources, and augment Arizona's groundwater through water supply development. The Code contains six main provisions: 1. The establishment of a program of groundwater rights and permits. 2. A provision allowing for no new agricultural irrigation within Active Management Areas (AMAs). 3. The preparation of five water management plans for each AMA. 4. The development of a program that requires the demonstration of an assured water supply for new growth. 5. A requirement to meter/measure water pumped from all large wells. WestLand Resources, Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc 24 6. Ap rogram for annual water withdrawal and use reporting. These reports may be audited to ensure water-user compliance with the provisions of the Groundwater Code and management plans. Penalties may be assessed for non-compliance. 3.2.2.2 Active Management Areas (AMAs) Areas where groundwater depletion is most severe are designated as AMAs, and are subject to regulation. There are five designated AMAs, including the Tucson AMA which includes the Town of Oro Valley. The Tucson AMA has a statutory goal of achieving safe-yield by 2025. Safe-yield means that the amount of groundwater pumped from the aquifer on an average annual basis must not exceed the amount that is naturally or artificially recharged. The safe-yield goal is a basin-wide balance. This means that water level declines in one portion of the AMA can be offset by recharging water in another part of the AMA. The Groundwater Code directs ADWR to develop and implement water conservation requirements for agricultural, municipal and industrial water users in five consecutive periods extending from 1980 through 2025. The First Management Plan applied from 1985 to 1990. The Second Management Plan's provisions are in effect until 2000. The Third Management Plan for the Tucson AMA is currently under review, and is expected to be adopted by the year 2002. Management plans reflect the evolution of the Groundwater Code, moving Arizona toward its long-term water management goals. The management plans establish conservation requirements for municipal, agricultural, and industrial water users. In each successive management plan, water conservation and management requirements will become increasingly stringent. 3.2.2.3 Conservation Requirements ADWR develops the conservation requirements with assistance from water users in the AMAs. Municipal water conservation requirements apply to water providers, cities, towns, private water companies, and irrigation districts that provide water for non-irrigation uses. The goal of the municipal conservation program in all AMAs is to promote efficient water use. The principal method of regulating water consumption is through the establishment of conservation requirements. The primary conservation program focuses on reducing per capita water use, which is measured in gallons per capita per day (gpcd). For each management plan period, water providers in the AMA are assigned a gpcd target. The gpcd limit for Oro Valley under the Second Management Plan is 225 gpcd for the year 1999, and 188 gpcd for 2000. The gpcd limit will remain at 188 gpcd until the Third Management Plan has been adopted. A new method for calculating the gpcd limit will be used under the Third Management Plan, based on a number of components, such as the number of new and existing residential, acres of turf, and lost water. This calculation may result in higher or lower gpcd limits for each year. By design, gpcd's are expected to be lowered over time, helping to promote greater water conservation and efficiency of use. WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft\Vtr Sys Mstr Pin.doc 25 The Management Plans, and other conservation-related State programs, cover a number of other requirements which are intended to promote water conservation: • Along new publicly owned medians or roadside areas served by municipal providers, groundwater may only be used for watering specific low water use plants. The Department maintains a list of more than 250 approved low-water use plants. • The management plans restrict water use at turf facilities larger than 10 acres in size, such as,golf courses, schools, parks, cemeteries and common areas of homeowners' associations. The amount of water that turf facilities can use on an annual basis is specific by a formula in the plans. The municipal restrictions for turf facilities are the same as those that apply to industrial facilities. • The First Management Plans contain restrictions on the use of groundwater in artificial lakes. A 1987 State law (The "Lakes" bill) restricts the use of both groundwater and surface water in lakes, ponds, and swimming pools within AMAs. In general, new lakes in AMAs cannot be larger than 12,320 square feet unless certain exemptions apply. For example, the lakes may be filled with effluent. However, special permits are available from the ADWR that allow new lakes to be filled with poor quality groundwater or other water sources on an interim or emergency basis. Lakes built before January 1, 1987 and lakes located in certain public facilities, such as parks, can continue to use groundwater. Golf course lakes are also exempt from the law because they are regulated by the management plans. • Private residential swimming pools cannot be larger than Olympic size (12,320 square feet). Resorts, motels, and country clubs can have several pools, but only one pool can be larger than Olympic size, but not larger than one acre in size. Each large municipal water provider must maintain its distribution system and properly meter and account for all deliveries. Water loses may not exceed 10 percent. Small providers must maintain their systems such that losses do not exceed 15 percent. 3.2.2.4 Assured Water Supply The Groundwater Code established requirements to ensure that water supplies are adequate to meet the long-term needs of new development. The Assured Water Supply Program requires the demonstration that sufficient water supplies of adequate quality are physically, continuously and legally available for 100 years. In an AMA, anyone who offers subdivided or non-subdivided land for sale or lease must demonstrate an assured supply of water to ADWR before the land may be marketed to the public. To receive an assured water supply certificate from ADWR, a developer must demonstrate that: 1) water of sufficient quantity and quality is available to sustain the proposed development for 100 years, 2) the proposed use is consistent with the management plan and achievement of the AMA management goal, and 3) the water provider has the financial capability to construct water delivery and treatment systems to WestLand Resources,Inc. Engineering and Environmental Consultants C.\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pln.doc 26 serve the proposed development. Alternatively, the developer can locate the proposed development within the service area of a city, town, or private water company that has already received a Designation of Assured Water Supply from ADWR. If the subdivision will be served by a "Designated" provider, the developer need only obtain a written commitment of service from the water provider. In 1995, ADWR adopted new Assured Water Supply Rules, primarily to support the groundwater management goals. New rules associated with this program promote the use of renewable supplies, such as effluent and water delivered via the CAP, as a component of an assured supply. The rules require new developments to be based predominantly on renewable supplies, such as effluent and water delivered via the CAP. In 1993, the Arizona legislature formally created the Central Arizona Groundwater Replenishment District (CAGRD) to provide a way for developers and water providers to demonstrate an assured water supply under the Assured Water Supply Rules and help the state meet the objectives of the 1980 Groundwater Management Act by replenishing pumped groundwater. CAGRD recharges groundwater supplies on behalf of its members in order to reach and maintain "safe yield" in the Tucson active management area. CAGRD is managed by the CAP, which is managed and operated by the Central Arizona Water Conservation District (CAWCD). CAWCD is a municipal corporation, also known as a public improvement district. This quasi-governmental entity was formed to repay the federal government for the reimbursable costs of construction, and to operate and manage CAP. 3.2.2.5 Groundwater Rights in AMAs A vital part of groundwater management involves identifying existing water rights and providing ways for water users to initiate new withdrawals. Within an AMA, a person must have a groundwater right or permit in order to pump groundwater legally, unless the person is withdrawing groundwater from an exempt well (maximum pump capacity of 35 gpm). Exempt wells may be used to withdraw groundwater only for non-irrigation purposes and are generally used for domestic purposes, including watering less than two acres of grass or garden. Exempt wells must be registered with ADWR, but are subject to fewer requirements than non-exempt wells within AMAs and INAs. In order to withdraw water from non- exempt wells in AMAs, either grandfathered rights, service area rights,or a withdrawal permits must exist for the well. Users who pump groundwater from non-exempt wells in AMAs must also report annual pumpage to ADWR. This provision helps ADWR determine how much water is being used and where it is being used. The Code also requires payment of an annual groundwater withdrawal fee. Revenues from the fee pay for half of the cost of administering the Code; the other half comes from Arizona's general fund. Withdrawal fees may also be used for conservation assistance and augmentation, projects, and retirement of irrigated land. WestLand Resources,Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr PIn.doc 27 3.3 LOCAL/OTHER REGULATIONS OVWU is governed by an elected Mayor and Council, which have jurisdiction over rate setting and water management issues. OVWU Policy and Codes establish additional rules regarding water service, fees, and rates. 3.3.1 Oro Valley Water Policies The Town of Oro Valley Mayor and Council have developed water policies, to define the way in which policy decisions regarding the Water Utility will be made. This document discusses the requirements for financing of the water utility, acquisition of other water systems, water supply, management and development, and conservation. 3.3.2 Oro Valley Water Utility Code The Town of Oro Valley Town Council adopted the Oro Valley Water Utility Code in March 1996, the purpose of which is to promote the health, safety, order and general welfare of those persons served by the OVWU. The Water Code sets up guidelines for the service of water to the residents of Oro Valley and those served by the water utility outside the town boundaries. The Code provides the basis for the operations of the water, company. The Code describes the duties and responsibilities of the Town Council, Town Engineer/Water Utility Director, and the Oro Valley Water Commission. The Code also provides for the adoption of a Comprehensive Water System Development Plan, to define the need for extensions, improvements or additions to the Town's water system. The Code also describes the conditions which must be met to allow new construction, agreements required for new construction or line extensions, and the method for review and approval of construction of facilities by entities other than the Town. Water system capacity requirements, oversizing refunds and service area inclusion and fees are discussed in this document. Finally, the Water Code presents the provisions of water utility service, the obligations of the Town related to water service, and establishes the water rates and other fees which may be charged to customers for the services provided by the Oro Valley Water Utility. 3.3.3 Monthly Water Service Fee and Commodity Charge Customers served by the Oro Valley Water Utility are charged a Monthly Service Fee for the first 1000 gallons of water used. The rate varies depending upon the size of the meter and whether the customer is within the Town Limits. All customers pay an additional Commodity Charge of $1.73 for each 1,000 gallons of water beyond the first 1,000 gallons. There are special Commodity Charges for the Vistoso Highlands Golf Course, La Cholla Air Park, and Metro Water District. WestLand Resources,Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206.10\Dft Wtr Sys Mstr Pin doc 28 3.3.4 Installation/Connection Fees An installation charge is required for all new water service connections. This charge includes the cost of the water meter,valves,boxes and installation. Charges for the installation vary with the size of the meter installed. 3.3.5 Development Impact/Hook-Up Fee For both the Canada Hills and Rancho Vistoso water systems, there is a Development Impact or Hook-up Fee paid at the time of connection to the water system. The fee is not a charge for parts and service to connect to the water system, but is charged to each new customer to finance the cost of infrastructure upgrades that are required to permit growth of the water system. This fee was calculated by predicting the water system infrastructure upgrades which would be required to support growth, and dividing this number by the number of probable housing units. In this way, each area which is developed pays for a portion of the water system construction required to serve that area. The hook-up fee varies depending upon the size of the meter, with a separate multi-family use fee. 3.3.6 Alternative Water Resources Development Fee The Oro Valley Water Utility applies an Alternative Water Resources Development Fee (AWRDF) to new customers. The purpose of this fee is to develop a capital budget that can be used in the future to finance the development of alternative water supplies. It is anticipated that the funds will be used to bring Central Arizona Project water to the Oro Valley area, to supplement the regional aquifer though recharge projects. The AWRDF depends upon the size of the meter, with additional fees for multi-family and turf uses. 3.3.7 Other Miscellaneous Fees Other service fees apply to both water systems, such as the New Service Establishment Fee, Service Reconnection Fee, After 5:00 p.m. Service Reconnection Fee, Meter Re-Read Fee, Insufficient Funds/Returned Check Fee, Customer Requested Meter Test, Customer Service Deposit for Basic Meters, Customer's Destruction of Property, Hydrant Meter Fee, and Delinquent Payment Fee. In addition, persons outside the Service Area who wish to be included in the Oro Valley Water Utility Service Area will be charged a Service Area Inclusion Fee. WestLand Resources, Inc. Engineering and Environmental Consultants C:\MyFiles\Jobs\206 10\Dtt Wtr Sys Mstr Pln.doc )9 +ern TABLES i TABLE 1 Oro Valley Water Utility Schedule of Rates, Fees and Charges October 17, 1998 Monthly Meter Hookup Minimum Installation Fees AWRDF Meter Size Water Rates Charges Effective Effective Effective 10-17-98 Effective 5-28-96 8-13-96 City All Other 5-28-96 CH RV 5/8"X 3/4" $7.90 $9.85 $100.00 $575 $550 $300.00 3/4" $130.00 $863 $825 $450.00 1" $19.70 $24.70 $160.00 $1,468 $1,375 $750.00 1.5" $39.95 $49.40 $350.00 $2,875 $2,750 $1,500.00 2" $63.00 $79.00 $440.00 $4,600 $4,400 $2,400.00 3" $127.80 $158.00 $750.00 $8,625 $8,250 $4,500.00 4" $200.74 $250.00 $1,600.00 $14,375 $13,750 $7,500.00 6" $401.48 $500.00 Cost $28,750 $27,500 $15,000.00 8" N/A $850.00 Cost $28,750 N/A N/A Multifamily Per Unit Cost N/A N/A N/A * $275 * $260 ** $144.00 NOTES: • (*) These rates were effective 2-5-97. • (**)These rates were effective 4-9-97. • • 5%sales tax must be added to all Meter Installation Charges. • 1,000 gallons are included in all Minimum Monthly Charges. • The commodity charge will be$1.73 per 1,000 gallons. • Special Commodity Charges: Vistoso Highlands Golf Course: $ .30 per 1,000 gallons La Cholla AirPark: $1.45 per 1,000 gallons Metro Water District: $1.45 per 1,000 gallons Service Charge Amount New Service Establishment Fee $15.00 Service Reconnection Fee $25.00 Service Reconnection Fee(after 5pm) $50.00 Meter Re-read Fee $15.00 Insufficient Funds/Return Check Fee $15.00 Customer Requested Meter Test Cost • Customer Security Deposit(basic) 2 X Bill Destruction of Property Cost Hydrant Meter Deposit $600.00 Delinquent Payment Fee $5.00 Service Area Inclusion Fee $5.00 per acre or $2.00 per lot TABLE 2 ORIGINAL CANADA HILLS WATER PRESSURE ZONE BOUNDARIES Zone Highwater(elev) Elevation Boundaries Static Pressure (psi) A 2500 2300—2400 87—43 B 2600 2400—2500 87—43 C 2700 2500—2600 87—43 D 2800 2600—2700 87—40 E 2900 2700—2800 85 —40 --- 3050 2800—2950 85 —40 --- 3200 2950—3100 85 —40 TABLE 3 ORO VALLEY WATER UTILITY PRESSURE ZONE BOUNDARIES Zone Highwater(elev) Elevation Boundaries Static Pressure(psi) A 2500 2300-2400 87-43 B 2600 2400—2500 87—43 C 2700 2500—2600 87—43 D 2800 2600—2700 87—40 E 2897 2700—2805 85 —40 F 3002 2805 —2910 85—40 G 3107 2910—3015 85 —40 H 3212 3015 —3120 85 —40 I 3317 3120—3225 85 —40 J 3422 3225 —3330 85 —40 K 3527 3330-3435 85 —40 L 3632 3435 —3540 85 —40 M 3737 3540—3645 85 —40 C:\MyFiles\obs\206.10\Tables 2 and 3.doc • EXHIBITS • i I ttP GI08121VH/139 4.1.4e, \\`. �\, Ill ril ilk ',.....„.„,. ky1 _ \, v. 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MIIILNWASAR014% * ' kk‘'",*,11.N \ \ \\\'"0\\‘' •• \ \.\' '\\ \ ‘ . , .\\ .,\\Ak\"\,_ ,*.:::f ,,,, * \\\\, ,\-\\\\\\\, \\\\\,\.\,;‘,\Itzek,,,ett420,1 ,\\\,,,,\\,\\\\\,,,,, \\\\\\\-\\.‘\\\\\\,\\\\,\.:. L il,\ 4S, .N. = , .,."-_,.%, \\\\ \\ \\, ,, ,...k\•\ N,, \ \ , , :,,,\ —.Alto—N.. . • , \ :,,..,, '...0:14.\al \\\\\\\: s'''' +,,ri\-77, \ , wr'— lii.:”\\ ---,s--stbsr, \'-\\.\ 1/4 7,--;%....„::::,-...,;i:,--4-.----\\ \\. ,\„ \,\,,,, kt1 ' ''''' '” \\‘\\L\\ NI ' .\, ...4b,.&, '.\ \, \ , \ \.\\\\' 6:6,.. k,-‘,,,t.,,,\ k.., \... . ,,,\N. ,. \ \ \ ,-\: ...... \ -‘,N,•” \ \\ ,m, 4., • \ aiij/'p''- ii as rAIlk ., 1 EEL EMI •I it 'MINMB 1 - MI . Tor i .4 I, 0 ft O �N I. �o IE )w oA z H O z C Z �iIII lap 0 1- N 0Po N a 5m a o o Q � m Al O M el C Si gli rc", z MI -4 m310 .4 co riiv OAC I O �,,� m X* NN r 2 TOWN OF ORO VALLEY STUDY SESSION COUNCIL COMMUNICATION MEETING DATE: SEPTEMBER 13,1999 TO: HONORABLE MAYOR & COUNCIL FROM: David G. Hook, P.E. Water Utility Director SUBJECT: ALTERNATIVE WATER RESOURCE PRIORITY LIST - UPDATE SUMMARY: In October 1998, the Oro Valley Water Utility and the Mayor and Council met in a joint study session to discuss 4 alternative water resource options. Consensus seemed to be that the Pima County option (Ina Road Reclaimed System) would be appropriate to be given preferred status while the final report that was being prepared on the feasibility of the project. The report was expected to be finished in February 1999. Pima County presented their preliminary findings at a April 1999 study session with the Marana Town council and the Metropolitan Domestic Water Improvement District Board of Directors. Copies of the draft executive summary were distributed by Pima County at that meeting. At their regular meeting in May, the Commission voted to revisit the various options available to the Town since delivery of the Pima County report was delayed and that particular option may no longer be the most viable option for the Town. At their June meeting, the Commission voted to form a subcommittee to re-evaluate the 4 options that were considered at the October 1998 meetings. The subcommittee has met every week or every other week since their first meeting on 7- 7-99. At first, discussion focused on background information relative to each option, i.e. what's new. Discussion then moved into more technical areas. The subcommittee has asked themselves and WestLand many in-depth questions to gain insight into the complex issues that entangle each of the 4 main options. WestLand Resources has provided feedback on their research into the details of the elements of each of the options, i.e. capacities, costs, compatibility and comparability. The subcommittee has not yet reached any final conclusions on which option is the most viable for the Town at this time. There does seem to be consensus that factors other than cost and time should be a part of the decision process and that some factors may be more important than others. The subcommittee is currently working through a ranking process using about 6 factors and expects to make recommendations to the Commission at its October meeting (10-11-99). A working copy of the draft issues matrix (dated 8-31- 99 and further revised at the 8-31-99 subcommittee meeting) is attached for your reference. i TOWN OF ORO VALLEY COUNCIL COMMUNICATION PAGE 2 OF 2 FISCAL IMPACT: There is no direct fiscal impact of the above discussion. As the Commission and the Mayor and Council address possible implementation actions in the near future, each will have an associated fiscal impact. RECOMMENDATIONS OF THE WATER UTILITY COMMISSION: The Commission has no formal recommendations to present at this time. RECOMMENDATIONS OF STAFF: Staff respectfully recommends that the Mayor and Council continue to support the evaluation efforts of the subcommittee and the Commission in anticipation of formal consideration of Commission recommendations within the next few months. ATTACHMENTS: 1. Working copy of the alternative water sources issue matrix (dated 8-31-99 and further revised 8-31-99). SUGGESTED MOTION: No formal action is required of the Mayor and Council at this time.0�VUtility Direct. 0 cl (- 4 . iAY d ,,, , , 4 Town Manager 3 - o -, cZ o c M o0 V •,, , or > - y _s _ V pj co • •r •g ‘, 4 !.), N). 4,. E g _ .g.,0-.g) "az.•ig - i'., z-g.1\ li -8 12) g. 3 8 ' -a, I Ili ,- i .^ \ Trcts , 8 g 't ci\_,,,glir:, MI VA .2.0';-,.g.(k8. ci. 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