Loading...
HomeMy WebLinkAboutCAL POLY 2035 MASTER PLAN – REGIONAL WATER SUPPLY ALTERNATIVESCAL POLY 2035 MASTER PLAN – REGIONAL WATER SUPPLY ALTERNATIVES Alternative Prioritization: Alt. # Water Supply Alternative Next Steps Pros/Cons Water Supply Decision Criteria Availability/ Timeframe Potential Partners Resiliency, Redundancy, or Offset c Engr./ Technical Environmental Impact/Permits Energy/ Sustainability Constr. and Operational Cost Estimated Water Quantity REGIONAL WATER SUPPLY OPPORTUNITIES. 1 Cal Poly could obtain water rights to the Nacimiento Water Project (NWP). Consult with NWP partners (SLO County, City of Paso Robles, Atascadero Mutual Water Co., etc.) to determine whether water rights are available to sell to Cal Poly to meet the water demand for 2035 Master Plan. + Provides resiliency if pipeline to deliver the water to the City’s water treatment plant (WTP) is constructed (see Alt. 2 & 4) + With Alt. 2 or 4, this alternative provides a new potable water supply source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. (See also Alts. 26-28) Short-term SLO Co./ Naci Partners Resiliency Low Low Good Buy-In $18,000 / AF $100,000 annual operational Estimated at 244 AFY, if from AMWC 2 As the existing NWP 12” pipeline does not have capacity to deliver additional water to the City of San Luis Obispo’s (City’s) Water Treatment Plant (WTP), Cal Poly could construct a parallel raw water supply line to the NWP pipeline from Cuesta Tank to the WTP (~5 miles of pipeline). Determine pipeline alignment and capacity of Cuesta Tunnel (CT) to accommodate the parallel pipeline through consultation with SLO County. City of San Luis Obispo (City) staff believes CT has capacity. + If the proposed parallel pipeline was large enough to provide conveyance capacity for Salinas Reservoir, this alternative adds redundancy to the City’s existing NWP and Salinas pipelines benefitting the City and Cal Poly. + With Alt. 1, construction of the raw water pipeline enables delivery of NWP water supply to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short- and Mid- term SLO Co./ Naci Partners Resiliency and Redundancy with Alt. 1 Med Med Neutral $8-12M 200 to 600 AFY 3 Cal Poly could partner with regional folks to expand capacity at Salinas Reservoir. May require lengthy environmental review and permitting process. + This alternative provides a new potable water source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Long-term SLO Co. re: Salinas Resiliency and Redundancy High High Negative $40-$80M 200 to 600 AFY 4 Cal Poly could construct an approximately 15 miles of raw water pipeline from NWP to Whale Rock Reservoir (WRR). Determine whether easement is available for this pipeline from former oil lines alignment along Hwy 41 to Hwy 46 corridor. + With Alt. 1, this alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. + With Alt. 1, ability to store NWP water in WRR could benefit the City and Cal Poly. - Cal Poly would continue to rely on the WRR pipeline for water supply delivery to the City’s WTP. Long-term Obtain Chevron contact Resiliency with Alt. 1 High High Negative $30-$45M 200 to 600 AFY STATE WATER PROJECT. a 5 Cal Poly could acquire rights to the State Water Project (SWP) to offset existing potable water use of WRR for agriculture and landscape irrigation (~ 320 AFY). Determine if any local entity (SLO County, etc.) is willing to sell its SWP allocation to Cal Poly to meet the water demand for 2035 Master Plan. Determine/estimate reliability of the SWP for a non-potable supply. Determine connection point to the SWP pipeline for delivery to Cal Poly. + Depending on the availability to buy-in to the SWP, this alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand through an offset of current potable water use of WRR. Short-term SLO Co. re: SWP Resiliency (non- potable), Offset Unknown Unknown Unknown Unknown Unknown, Cal Poly to contact SLO County High Moderate Low Cal Poly 2035 Master Plan Regional Water Supply Alternatives Page 2 Alt. # Water Supply Alternative Next Steps Pros/Cons Water Supply Decision Criteria Availability/ Timeframe Potential Partners Resiliency, Redundancy, or Offset c Engr./ Technical Energy/ Sustainability Environmental Impact/Permits Constr. and Operational Cost Estimated Water Quantity 6 Cal Poly to acquire rights to the SWP and additional water treatment (e.g. add “breakpoint chlorination” near the City of San Luis Obispo’s Reservoir 1 proximate to the existing SWP pipeline). Cal Poly could then utilize this water supply for potable purposes. Like Alt. 5, determine any local entity is willing to sell its SWP allocation to Cal Poly. Determine/estimate reliability of the SWP for a potable water supply. Determine treatment method. Determine connection point to the SWP pipeline for delivery to Cal Poly. + Depending on the availability to buy-in to the SWP, this alternative could provide a new potable water supply source meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short-term (feasibility) and Mid (siting treatment component) SLO Co. re: SWP OR City of Morro Bay re: SWP Resiliency and Redundancy Unknown Unknown Unknown Unknown Unknown, Cal Poly to contact SLO County 7 Cal Poly could acquire additional water from WRR through an “exchange” agreement or purchase with the California Men’s Colony (CMC) who has existing water rights (11%) to WRR and the SWP. Like Alt. 5, determine any local entity is willing to sell its SWP allocation to Cal Poly for potential “exchange” for additional WRR with CMC. Determine if CMC is willing to “exchange” 400 AFY of its WRR rights for additional water from the SWP. + Increased water supply from WRR + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. - Cal Poly would continue to rely on the WRR pipeline for delivery to the City’s WTP. Short-term CMC No, continues dependence WRR and pipeline Could utilize existing pipeline and infra. Similar to existing Similar to existing Could utilize existing pipeline and infra. Unknown, Cal Poly to Contact CMC CITY OF SAN LUIS OBISPO WATER SUPPLY RESOURCES. 8 Cal Poly could buy-in to the City’s water supply portfolio to meet its additional water demand. This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased water sales. Short-term City of SLO Resiliency and Redundancy Low Good Low $13.7M to $41.1M 200 to 600 AFY 9 Cal Poly could buy-in to the City’s water supply portfolio, provide funding for the construction of additional recycled water (RW) storage, and expand the City’s RW distribution system (this expansion is not currently funded). Having Cal Poly fund these improvements would accelerate the use of RW, and the offset of potable water usage sooner. A potable water offset of greater than 1:1 could be required by the City. RW is not included in the City’s secondary water supply until it is delivered. Potential RW distribution system expansion and site retrofit projects are identified in the City’s Recycled Water Master Plan. The available RW supply may be limited due to flow and in-City deliveries. Determine scope/feasibility of modifications to RW storage, distribution system, and within the Water Resource Recovery Facility (WRRF). Determine scope/feasibility of potential site retrofit projects. This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand through an offset of current potable water use in the City. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would accelerate the funding of infrastructure (RW storage, distribution system expansion, other WRRF improvements, and site retrofit projects). + This alternative would increase the use of the City’s RW supply. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased RW sales. Short-term and Mid-term City of SLO Resiliency, Redundancy, Offset Low Good Low $10M + Option 8 200 AFY Cal Poly 2035 Master Plan Regional Water Supply Alternatives Page 3 Alt. # Water Supply Alternative Next Steps Pros/Cons Water Supply Decision Criteria Availability/ Timeframe Potential Partners Resiliency, Redundancy, or Offset c Engr./ Technical Energy/ Sustainability Environmental Impact/Permits Constr. and Operational Cost Estimated Water Quantity 10 Cal Poly could buy-in to the City’s water supply portfolio and provide funding for expansion of the City’s groundwater program. Groundwater resources are not included in the City’s primary, reliability, or secondary supply calculations. This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would accelerate the funding of infrastructure and use of the City’s ground water supply. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased water sales. Short and Mid- term City of SLO Resiliency and Redundancy Low Good Med + City possible project $1M + Option 8 500 to 800 AFY 11 Cal Poly could buy-in to the City’s water supply portfolio and expand the City’s RW distribution system to deliver RW to Cal Poly during off-peak irrigation season only for agriculture and landscape irrigation use (this expansion is not in the City’s RW Master Plan at this time). Cal Poly to provide seasonal storage. The City’s RW supply is limited due to flow, SLO creek discharge requirements (See Alt. 15), and in-City deliveries. Explore off-peak delivery schedule options, pipeline routes, and storage. Modifications may be needed to the WRRF. This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand through an offset of Cal Poly’s current potable water use of WRR for agriculture and landscape irrigation. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would benefit the City as it would not conflict with in-city RW use. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased RW sales. Short-term and Mid-term City of SLO Resiliency, Redundancy, Offset High Neutral High $10 to $20M + Option 8 200 to 600 AFY 12 Cal Poly could buy-in to the City’s water supply portfolio and expand the City’s RW storage and distribution system to deliver RW to Cal Poly for agriculture and landscape irrigation (this expansion is not in the City’s RW Master Plan at this time). The City’s RW supply is limited due to flow, SLO creek discharge requirements (see Alt. 15), and in-City deliveries. Modifications may be needed to WRRF. Explore water demand and potential delivery schedule, pipeline routes, etc. This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand through an offset of Cal Poly’s current potable water use of WRR for agriculture and landscape irrigation. - This alternative would utilize a water supply that would otherwise be available for use in the City. - As RW delivery is limited by the amount of flow available, this alternative may reduce in-city RW use. + This alternative would offset existing potable water used for irrigation in the City. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased RW sales. Short-term and Mid-term City of SLO Resiliency, Redundancy, Offset High Neutral High $15 to $25M + Option 8 200 to 600 AFY Cal Poly 2035 Master Plan Regional Water Supply Alternatives Page 4 Alt. # Water Supply Alternative Next Steps Pros/Cons Water Supply Decision Criteria Availability/ Timeframe Potential Partners Resiliency, Redundancy, or Offset c Engr./ Technical Energy/ Sustainability Environmental Impact/Permits Constr. and Operational Cost Estimated Water Quantity 13 Cal Poly could buy-in to the City’s water supply portfolio and create a potable water supply by funding WRRF Improvements for indirect potable reuse (IPR). Necessary improvements for IPR have not been identified. This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would add water supply resiliency or redundancy for the City. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased water sales. Short-term and Mid-term City of SLO Resiliency and Redundancy High Neutral High Unknown + Option 8 200 to 600 AFY 14 Cal Poly could buy-in to the City’s water supply portfolio and create a potable water supply by funding WRRF Improvements for direct potable reuse (DPR) Necessary improvements for DPR have not been identified. This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would add water supply resiliency or redundancy for the City. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased water sales. Short-term and Long-term City of SLO Resiliency and Redundancy High Good High Unknown + Option 8 200 to 600 AFY 15 Cal Poly could buy-in to the City’s water supply portfolio and work with the City to secure a reduction in the NOAA NMFS discharge requirement to SLO Creek thereby increasing the available RW supply (with Alt 11, 12, 13 and 14). This alternative would require City Council approval. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand through an offset of Cal Poly’s current potable water use of WRR for agriculture and landscape irrigation. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would reduce the RW supply limitations of Alts. 11 and 12. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the City’s water supply portfolio and increased RW sales. Short-term and Mid-term City of SLO Resiliency and Redundancy High Good High Low + Option 8 200 to 600 AFY 16 Cal Poly could buy-in to the City’s water supply portfolio and fund improvements to reduce water loss in the City (some measures to reduce water loss are not funded at this time). The City has conducted Water Audits consistent with Senate Bill 555 and identified a series of measures to reduce “real” and “apparent” water loss. This alternative would require City Council approval. + This alternative could meet a portion of Cal Poly’s 2035 Master Plan water demand. - This alternative would utilize a water supply that would otherwise be available for use in the City. + This alternative would accelerate funding to reduce water loss in the City. + This alternative would generate Water Fund revenue from Cal Poly’s buy-in to the Short-term and Mid-term City of SLO Resiliency and Redundancy Low Good Med Estimated at $5-10M + Option 8 200 AFY Cal Poly 2035 Master Plan Regional Water Supply Alternatives Page 5 Alt. # Water Supply Alternative Next Steps Pros/Cons Water Supply Decision Criteria Availability/ Timeframe Potential Partners Resiliency, Redundancy, or Offset c Engr./ Technical Energy/ Sustainability Environmental Impact/Permits Constr. and Operational Cost Estimated Water Quantity City’s water supply portfolio and increased water sales. ON-CAMPUS WATER RESOURCES. 17 Cal Poly could construct and operate a water reclamation facility and on-site storage to produce a RW supply for ag and landscape irrigation use. Cal Poly’s available RW supply may be seasonally limited due to available flow when Cal Poly is not in session. + Under this alternative, Cal Poly would obtain a new non-potable water supply source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand through an offset of Cal Poly’s current potable water use of WRR for agriculture and landscape irrigation. Mid-term N/A Resiliency (non- potable), Offset High Good High $10-15M 200 to 400 AFY 18 Cal Poly could drill/operate additional groundwater wells for ag and landscape irrigation use. Cal Poly could work with a hydrogeologist to understand potential yield and siting of new wells. Use of new groundwater wells may have implications under the Sustainable Groundwater Management Act (SGMA). + This alternative would expand Cal Poly’s non-potable water supply source to offset existing potable water from WRR used for irrigation. + This alternative could meet a portion of Cal Poly’s 2035 Master Plan water demand through an offset of Cal Poly’s current potable water use of WRR for agriculture and landscape irrigation. Short-term N/A Resiliency (non- potable), Offset Unknown Unknown Unknown Unknown Unknown 19 Cal Poly could utilize rainfall capture and construct on-site storage for ag and landscape irrigation use. Cal Poly to determine feasible location(s) for rainwater capture, storage, distribution, etc. + This alternative would expand Cal Poly’s non-potable water supply source to offset existing potable water from WRR used for irrigation. + This alternative could meet a portion of Cal Poly’s 2035 Master Plan water demand through an offset of Cal Poly’s current potable water use of WRR for ag and landscape irrigation. Short-term and ongoing with new project development N/A Resiliency (non- potable), Offset High Good Med Unknown Unknown 20 Cal Poly could make improvements to reduce water loss on the campus. Following a Water Audit, Cal Poly to determine locations of current water loss and necessary improvements. + Cal Poly would offset existing potable water from WRR. + This alternative could meet a portion of Cal Poly’s 2035 Master Plan water demand. Short-term N/A Offset Low/Med Good Low $1M Unknown DESALINATION. 21 Cal Poly could work with the City of Morro Bay/Regional Partners to obtain water rights through the operation of the Morro Bay desalination facility. Consult with City of Morro Bay to determine feasibility, operational requirements/permits. Determine if this water supply could be connected to the WRR pipeline following desal process (explore potential corrosivity issues). May require lengthy environmental review and permitting process. + Cal Poly would obtain a new potable water supply source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short-term (feasibility) and Long-term (implementation) City of Morro Bay Resiliency High Neutral to Negative High Unknown 200 to 600 AFY 22 Cal Poly could partner with regional partners to construct a desalination facility in Avila Beach and distribution pipeline to deliver water the campus. Siting of a desalination facility and a pipeline alignment for water delivery are unknown. + Cal Poly would obtain a new potable water supply source to meet all or a Long-term TBD Resiliency and Redundancy High Neutral to Negative High Unknown Unknown Cal Poly 2035 Master Plan Regional Water Supply Alternatives Page 6 Alt. # Water Supply Alternative Next Steps Pros/Cons Water Supply Decision Criteria Availability/ Timeframe Potential Partners Resiliency, Redundancy, or Offset c Engr./ Technical Energy/ Sustainability Environmental Impact/Permits Constr. and Operational Cost Estimated Water Quantity May require lengthy environmental review, permitting, and mitigation. May require upgrades to the City’s WTP due to water quality. portion of Cal Poly’s 2035 Master Plan water demand. OTHER ALTERNATIVES. 23 Cal Poly could secure rights to Chorro Reservoir from CMC or “exchange“ similar to Alt. 7. Determine if CMC is willing to “exchange” its Chorro Res. rights for additional SWP. Verify available water supply from Chorro Reservoir. +This alternative would provide a new potable water source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short-term CMC Resiliency, continues dependence on WRR pipeline Low Good High Low 200+ AFY 24 Cal Poly could acquire RW from the City of Morro Bay or another local agency. Construct distribution mains as needed. Cal Poly to determine if other entities have the ability to serve them RW. +Under this alternative, Cal Poly would obtain a new non-potable water supply source + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand through an offset of Cal Poly’s current potable water use of WRR for agriculture and landscape irrigation. Mid-term City of Morro Bay Resiliency (non- potable), Offset High Neutral High Unknown Unknown 25 As the Enda Valley groundwater basin has the ability to store groundwater for later extraction, Cal Poly could enter into water banking agreement with the City of San Luis Obispo and Edna Valley Growers. This alternative may have implications under SGMA. A water banking agreement would require City Council approval. +This alternative could improve water supply resiliency. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Long City of SLO, Enda Valley Growers High Neutral High Unknown Unknown 26 Cal Poly could obtain water rights to the NWP through purchase of CSA-10A/ SLO County (capacity exists in Naci pipeline) Cal Poly to meet with SLO County Consult with NWP partners. (SLO County, Paso Robles, Atascadero, etc.) to determine whether water rights are available to sell to Cal Poly. + This alternative provides a new potable water source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short-term SLO Co./ Naci Partners Resiliency and Redundancy Low Good Low $630,000 Buy-in Est. $25,000 Annual Operational Est. 15 to 40 AFY 27 Cal Poly could obtain water rights to the NWP (Alt. 1) and purchase excess NWP pipeline capacity from the City to enable water delivery. Consult with NWP partners. Conduct preliminary engineering study. This alternative would require City Council approval. + This alternative provides a new potable water source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short-term, if capacity exists SLO Co./ Naci Partners Resiliency and Redundancy Med Good Low Low Unknown 28 Cal Poly could obtain water rights to the NWP and construct a “jumper” between the Naci pipeline and the Salinas pipeline at the Cuesta Tunnel to enable water delivery. Consult with NWP partners. Work with SLO County to conduct preliminary engineering study to look at parametric table and to verify feasibility with hydraulic modelling (Salinas and Naci). This alternative would require City Council approval. + This alternative provides a new potable water source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short-term SLO Co./ Naci Partners Resiliency and Redundancy Med Good+ Low $15M Total Partners will share costs 200 to 600 AFY Cal Poly 2035 Master Plan Regional Water Supply Alternatives Page 7 Alt. # Water Supply Alternative Next Steps Pros/Cons Water Supply Decision Criteria Availability/ Timeframe Potential Partners Resiliency, Redundancy, or Offset c Engr./ Technical Energy/ Sustainability Environmental Impact/Permits Constr. and Operational Cost Estimated Water Quantity 29 Cal Poly could acquire rights to the SWP and use the “chloraminated” potable water supply to serve development proposed under the 2035 Master Plan. Determine if a local entity (Morro Bay, SLO County, etc.) is willing to sell a portion of its SWP allocation to Cal Poly to meet the water demand for 2035 Master Plan. Determine/estimate reliability of the SWP for a potable supply. Conduct preliminary engineering to determine connection point to SWP and pipeline alignment for delivery to Cal Poly. + This alternative provides a new potable water source to meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short-term and Mid-term SLO Co. Re: SWP Resiliency and Redundancy Need to understand pipeline capacity issue Unknown Unknown Unknown Unknown, Cal Poly to contact SLO County 30 Cal Poly could acquire treated wastewater from the Cayucos Sanitary District’s Sustainable Water Project and conduct surface water augmentation at WRR. Consult with Cayucos Sanitary District to determine if water was available. Consult with WR Commission and Cayucos Area Water Organization (CAWO)b. Conduct preliminary engineering study and feasibility analysis. + Under this alternative, Cal Poly (and WR partners) would augment its existing rights to WRR. + This alternative could meet all or a portion of Cal Poly’s 2035 Master Plan water demand. Short (Feasibility) Mid (Permitting, etc.) Cayucos Sanitary District WR Com. Resiliency Unknown, Call District Rep. Good High Unknown 200+ AFY NOTES: a. Per the Central Coast Water Authority 2015 Urban Water Management Plan, the San Luis Obispo County Flood Control and Water Conservation District (SLOCFCWCD) has 25,000 AF per year in State Water. At the time of the design and construction of the Phase II Coastal Branch conveyance facilities, SLOCFCWCD elected to commit to funding for only 4,830 AF per year of treatment plant and conveyance capacity. More information is available at: http://www.ccwa.com/Archives/UWMPs/2015-CCWA-UWMP.pdf b. Per the City of San Luis Obispo’s 2016 Urban Water Management Plan, the Cayucos Area Water Organization (CAWO) includes the three water purveyors that serve the town of Cayucos (Paso Robles Beach Water Association, Morro Rock Mutual Water Company, County Service Area 10A) and the Cayucos-Morro Bay Cemetery District. The Whale Rock Commission and the CAWO have an agreement which includes a provision to provide up to 600-acre feet of water per year from the reservoir. The agreement dates back to the period when the dam was being planned and constructed. The agreement has been amended since that time. The water provided to the CAWO is delivered from the Whale Rock pipeline to the Cayucos Water Treatment Plant operated by the County of San Luis Obispo (County). c. Definitions: AFY = Acre feet per year Water supply “offset” means creating a reduction in demand for potable water through the provision of a non-potable or recycled water supply for agricultural irrigation or landscape irrigation. Water supply “resiliency” means having multiple water supply sources to draw from regardless of disruptive events that may occur, such as drought or climate change. Water supply “redundancy” means the duplication of critical water supply infrastructure to increase reliability, such as via a backup pipeline.