Urban Water Institute Annual Water Conference August 27, 2015 S ITES R ESERVOIR P ROJECT

Partners - Sites Joint Powers Authority Members Glenn County Colusa County Glenn-Colusa Irrigation District Tehama Colusa Canal Authority Reclamation District 108 Maxwell Irrigation District Yolo County Flood Control and Water Conservation District Colusa County Water District Westside Water District Orland Artois Water District Proberta Water District DWR – non voting member

Project Location

Location and Features Storage capacity: 1.3 to 1.8 M acre-ft Aug Draft

Flyover 2015 Aug Draft

Alternatives 2015 Aug Draft

Annualized Yield (Thousand acre-ft.) Reservoir Size: 1.8 MAF1.3 MAF Year Type:AverageDry/Critical AverageDry/Critical Filling: Releases*: * Results do not include operation of the CA WaterFix (aka in- Delta conveyance), which, depending on additional spring outflow, reduces overall water supply available for Ag & M&I Aug Draft

Costs/acre-ft. (with financing) 2015 Aug Draft

Annualized Water Benefits (Thousand acre-ft.) Reservoir Size: 1.8 MAF1.3 MAF Year Type:AverageDry/Critical AverageDry/Critical Filling: Releases*:  Ag & M&I:  Carriage Loss:  Public Benefit: * Results do not include operation of the CA WaterFix (aka in-Delta conveyance), which, depending on additional spring outflow, reduces overall water supply available for Ag & M&I. NOTE: Carriage loss is the contribution to in-Delta water quality (aka ‘salt cost’), which is estimated Aug Draft

Public Benefits of Sites Public Benefits

Public Benefits ($ million/year) 2015 Aug Draft

Public Benefits, Ecosystem (DFW Priorities) 1.Native Fish: Promote recovery of threatened & endangered plus at risk species 2.Restore physical processes & flow regimes to improve habitats & natural communities 3.Enhance Recreation 4.Reduce adverse effects of non-native species 5.Reduce in-river structures’ impact on anadromous species 6.Increase aquatic & riparian habitat & wetlands (managed & unmanaged) Timing of releases & Shasta Cold water pool Releases can match time of year ‘needs’ Included ?Further evaluation is needed Existing intakes are compliant. New intake/outlet will be designed to current standards Managed seasonal wetlands, including refuges Self-Assessment 2015 Aug Draft

Public Benefits, Water Quality (SWRCB Priorities) 1.For water bodies listed as impaired by CWA §303(d), a.Improve water temperature b.Improve dissolved oxygen c.Improve nutrient conditions d.Reduce effects of mercury e.Reduce salinity 2.Protect &/or cleanup groundwater deemed high or medium per CASGEM 3.Achieve Delta tributary flows that resemble natural hydrograph patterns for aquatic species 4.Develop local water supplies to reduce water demand on the Delta watershed Shasta CW Pool ?Location dependent ?Potentially ?Flow vs. new habitat Emergency response ?In lieu of groundwater pumping in S. of Delta ?Baseline dependent Sac. valley interest in project allows stored water to be used in lieu of diversions during critical times Self-Assessment 2015 Aug Draft

Other Societal Benefits (not eligible for Prop 1 funding) 1.Pumped-storage capability to capture surplus renewable energy (daytime) & contribute to demand during off-peak (night) & shoulder loading time periods (dawn & dusk), which aligns with the governor’s goal to ‘decarbonize’ the state. 2.Contributes to the local & regional economy 3.Contributes to stabilizing local groundwater levels 4.Additional source for transfer water (some of which could be used to supply disadvantaged communities in the San Joaquin valley) Alternatives A thru C Ancillary services created by recreation, additional jobs (construction & O&M), & spending on maintenance. Local use of stored water in lieu of groundwater pumping All alternatives Self-Assessment 2015 Aug Draft

Operations (with Existing System) 2015 Aug Draft

Increases annual carryover storage * (Thousand acre-ft.) Reservoir Size: 1.8 MAF1.3 MAF Year Type:AverageDry/Critical AverageDry/Critical End Sept: 1, * Increase in the end of September storage in Trinity, Shasta, Folsom, Oroville, & Sites reservoirs 2015 Aug Draft

“Mutual Aide” to Folsom: Proximity to Delta allows Sites to release flows in response to in-Delta water quality concerns in lieu of the CVP & SWP dependence on relying solely on releases from Folsom. Integrated Operations: Operating Sites in conjunction with CVP & SWP to better optimize available water for both water supply and public benefits Aug Draft

Project Summary DWR/USBR Alternative C 1.8 MAF 500 TAF/Year yield 1.2 MAF of increased upstream storage Benefits - Water Supply-50%, Ecosystem- 50%, Power, Recreation $ B Construction Cost 10 Year Planning &Construction $550 - $700/AF