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Price Canyon Master Plan

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Price Canyon Master Plan June, 2013 City Council Review Draft Chapter 5. Infrastructure and Phasing of Development A. Public Services A variety of demands for public services are associated with expansion of the City into Price Canyon. These demands take the form of infrastructure to serve the future land uses (such as roads, water and wastewater systems, utilities and the like) as well as general City services, such as police and fire protection, general government administrative services, recreation programs, and so on. These public service demands also take the form of more basic needs, such as water to supply domestic and irrigation demands, as well as wastewater collection, treatment and disposal needs. In this Chapter, the Specific Plan will quantify overall demands for water resources and wastewater treatment and disposal by type and density of proposed uses, which then translates directly into delivery, storage and treatment needs for water and sewer systems. Management of storm water runoff is also included under this Chapter. Flood control and implementing Low Impact Development standards are also major public service goals. Demands for new roads, utilities, police, fire and other governmental services are similarly presented below. Later in this Chapter, a series of requirements are identified that will dictate how water resources will be secured for the Plan Area, and how public and private infrastructure will be timed to meet the buildout demands of the Plan Area. Lastly, a Phasing Plan is presented to delineate when each Neighborhood will be built, and what resources and infrastructure will be completed to support each phase. Each phase is designed to stand alone and will be self- sufficient. B. Water Supplies At the time of consideration of this Specific Plan, the City has three (3) existing sources of water to supply the needs of the Pismo Beach community. These sources are groundwater wells within the Tri-Cities Mesa Sub-basin of the adjudicated Santa Maria Valley Groundwater Basin (aka “Northern Cities Management Area (NCMA) Basin”), surface water supplies from the Lopez Lake County Flood Control District Zone 3 (Lopez) Project, and surface supplies delivered by the State Water Project (SWP). Chapter 5 – Infrastructure and Phasing Spanish Springs Specific Plan Page 5 - 1 June, 2013 City Council Review Draft These sources total 2,836 acre feet per year (AFY) of secured water rights as follows: Tri-Cities / NCMA Groundwater Basin 700 AFY Lopez Lake Reservoir 896 AFY State Water Project 1,240 AFY Total Supply (2012) 2,836 AFY C. Water Demands This Specific Plan identifies the following water sources and water demands for the Spanish Springs area: Pismo Creek Groundwater for Agricultural irrigation = 52 afy Recycled water for golf (at 57 afy), parks (at 6 afy), landscape irrigation (at 88 afy) = 151 afy Recycled water irrigation system losses (estimated at 2.6 afy) = 3 afy Domestic (potable) supplies from existing City supplies for residential use (at 71 afy) and commercial use (at 15 afy) = 86 afy Domestic (potable) supplies system losses (estimated at 2.6 afy) = 3 afy Overall Specific Plan Water Demand = 295 acre feet / year In order to enhance the reliability of the City’s State Water Project water supplies, the Spanish Springs Specific Plan area will be responsible for permanently contracting for SWP drought buffer supplies in an amount equal to 500 acre feet per year. The cost for this additional city-wide drought buffer will be paid for as an additive to the water rates paid by the occupants of Spanish Springs, at a rate set annually by the City to insure these added buffer supplies are paid for exclusively by the Spanish Springs residents and businesses. An Assessment District or other financial mechanism shall be established to appropriately spread costs between developed and undeveloped property within Spanish Springs. D. Water Resource Requirements for Annexations City policy provides that any annexations to the City must “…demonstrate sustained long term water sources prior to approval of annexations” (General Plan Policy F-40). The Water Supply Assessment (WSA) included in the EIR for this Specific Plan analyzes the reliability of the sources noted above, provides suggestions as to how to improve the reliability of those existing sources, and also identifies additional new water supplies that development Chapter 5 – Infrastructure and Phasing Spanish Springs Specific Plan Page 5 - 2 June, 2013 City Council Review Draft projects under the Specific Plan may pursue to improve the City’s overall inventory of available resources, and the capacity of the City to deliver those resources in various wet and dry year scenarios to its customers. Recycled Water and Drought Buffer supplied by the developer of Spanish Springs in the manner defined by this Specific Plan satisfies General Plan Policy F-40. E. Recycled Water Supplies All irrigation needs for the Spanish Springs Specific Plan area shall be met through use of recycled water. These irrigation needs have been estimated at 154 afy, which includes irrigation of golf course (57 afy), commercial (14 afy), residential-senior (74 afy), and parks (6 afy), with an additional system loss factor (3 afy) included. All Specific Plan uses will be served by Recycled Water for irrigation supplies, consistent with City and State health standards and plumbing regulations, delivered in “purple pipe” recycled water lines. The City, at Developer’s expense, will be responsible for obtaining a permit from the State Health Department to operate a recycled water system. Recycled water shall be available as a back-up supply for agricultural irrigation needs, and comply with Health and Agricultural Department standards. Recycled water (reuse) is a significant feature of the Specific Plan. Given that recycled water will be extended into the Specific Plan area to service the golf course, provide landscape irrigation and back-up AG irrigation needs, the Specific Plan for Spanish Springs will be a very sustainable project, since all the wastewater generated by the project will be used for irrigation within the project. The additional regional public benefit that will be derived from the production of 1,540 acre feet per year of recycled water includes: Improved wastewater effluent quality (tertiary treatment). The ability to reuse recycled water within the region for groundwater recharge, and as a sea water intrusion barrier. Reductions in the amount of wastewater discharged to the ocean as additional recycled water is used. The public would have sufficient water resources to withstand even the most severe droughts, with this additional water supply. The recycled water treatment system to be added to the plant will be a developer-financed project, under an agreement for credits and/or reimbursements with the City from other users of the recycled water. Operations of the recycled water will be recovered Chapter 5 – Infrastructure and Phasing Spanish Springs Specific Plan Page 5 - 3 June, 2013 City Council Review Draft based on a fee-for-service model (“enterprise fund”), similar to present water billings or sewer operations charges. Once recycled water is available through the treatment systems at the City plant, recycled water can be conveyed to the golf, landscape and agricultural users outlined in this Plan. To do this, interim storage holding tank(s) will be needed at the wastewater plant as these supplies are generated, and additional storage facilities will be needed near the end users of this water. Installation of distribution lines and end user storage facilities will be the responsibility of each Neighborhood developer to install, under the guidance of the City Engineer. The backbone systems will be initially designed with the initial development. As each Neighborhood is developed, the required backbone components and specific details for each neighborhood will be specified. The recycled system will include: (1) treatment facilities at the City’s wastewater plant with the initial development; (2) recycled water main and lateral distribution lines (“purple pipe”); (3) one or more pump stations to deliver the recycled water to the Planning Area; and, (4) storage reservoirs (both tanks and open lakes). Storage facilities are assumed to include capacity to meet about 5 times peak daily demands, which would approximate 4.30 acre feet of storage (1.402 million gallons)1, based on a potential buildout demand for recycled water within the Spanish Springs Plan Area of 154 acre feet per year and any upsizing necessary to serve other areas within the Sphere of Influence. These improvements shall be made in the same manner and generally the same locations as other utility and infrastructure corridors along major roads of the plan area (depicted on Figure 7, Circulation Plan, and Figure 11, Conceptual Utilities Plan), as deemed necessary by the City Engineer to utilize the recycled water for the irrigation uses described herein. F. Domestic Water Supplies Water supplies to meet domestic (potable) project needs will come from existing City supplies, including Lopez water, State Water Project deliveries, and the Tri-Cities groundwater basin. 1 154 afy of recycled water divided by 365 days = 0.422 af/day average x’s 2 for peak daily demand = 0.844 af/day peak demand = 199,058 gallons/day x’s 5 for storage volume = 3.05 acre feet (or 995,290 gallons) recycled water in storage at any given time Chapter 5 – Infrastructure and Phasing Spanish Springs Specific Plan Page 5 - 4 June, 2013 City Council Review Draft Water main lines will be installed by Neighborhood developers, under the guidance of the City Engineer. Three (3) additional reservoirs for storing potable water are anticipated. One (1) added reservoir would be constructed alongside the current reservoir at the top of Highland Drive, and two (2) additional reservoirs will be needed on Spanish Springs to complete the overall storage and distribution system for the Specific Plan area.
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