Temperance Flat Reservoir Project Why Storage Is Needed

Millerton Lake has Restoration adds Water shortages Regional Climate change no long-term to Friant operating cause economic groundwater increases water storage space complexities impacts overdraft is critical supply challenges

390 TAF active Management of Zero allocation to Subsidence has Early runoff means storage capacity flow releases CVP Friant and SOD reduced regional less inflow can be in 2014 & 2015 delivery capability delivered or stored 1,800 TAF average Water temperature annual inflow for fish life stages Two years’ worth of Half of land area of Higher temperature Friant delivery in all high reduces restoration 250 TAF/yr average 2017 flood releases priority SGMA basins effectiveness flood release are in the Applicant Partners and Implementation

• 5 Counties • Large and small cities • Over 3 million acres • Tribal interests

In coordination with

A broad group of water users is conducting evaluations to define investor commitments Temperance Flat Project Facilities

Dam – Roller Compacted Concrete (RCC) – 665 ft tall

Reservoir – 1.33 MAF total – 1.26 MAF net

Powerhouse – 160 MW – 6,000 cfs

A 1930 study found Temperance Flat Dam site superior for water storage but recommended due to cost and project purposes planned at the time Dam and Reservoir Features Project Facilities

• Dam and Reservoir • Outlet Works & Power Features • RCC Dam • Diversion and Outlet Tunnel & Portals • Reservoir Clearing • Low Level Intake Structure • Fine Gold Creek Bridge • Powerhouse, Valve House, & Outlet • Contractor Use Areas • Transmission • Haul Roads • Haul Roads • Permanent Access Roads • Permanent Access Roads • Powerhouse Access Bridge • Diversion • Works Chute • Embankment Cofferdams • Diversion Stop-logs • Affected Infrastructure • Kerckhoff Powerhouses Decommissioning • Spillway • Utilities • RCC Spillway • Transmission Line Relocation • RCC Spillway Bridge • Recreational Facilities

Reclamation Performed Constructability and Cost Reviews: • Value Planning • Value Engineering • Design, Estimating and Construction (DEC) Water Sources for Temperance Flat Reservoir Project

San Joaquin River flood flows that exceed management capability and SJRRP requirements

South-of-Delta Supply such as allocations and acquired water Regional Supplies from other watersheds and sources, as demonstrated by Kings River exchange Benefits will be Managed Through Storage Accounts

Millerton Lake Madera Canal Friant-Kern Canal Deliveries Deliveries Millerton Spills

Temperance Flat operations preserve Temperance Friant Division Capabilities SJRRP Storage Flat Reservoir Releases Accounts Storage account management will be through a new entity or partnership How Project Operations Achieve Benefits Public Benefits Non Public Benefits Ecosystem Water Supply • Improved water temperature for SJRRP • Help stabilize Friant and SOD supplies releases to the San Joaquin River • Support groundwater sustainability • Downstream delivery increases flows and further improves temperature Hydropower • Level 4 Refuge water supply • Net increase at Friant after replacing Recreation lost Kerckhoff project generation • Net increase at Millerton Lake and Temperance Flat Reservoir Flood Control • Increased available capacity Emergency Response • Stored water South of the Delta Physical Changes Produce Ecosystem Benefits

River Flow

Floodplain Water Activation Temperature Flow Changes Are Beneficial For Restoration

Changes in Friant Dam Releases 2030 Simulation

Store High Release No Change in Inflow Supplemental Flows Releases

Releases meet or Releases exceed Releases meet exceed SJRRP Flows SJRRP Flows SJRRP Flows

24% of Time 38% of Time 38% of Time Flow Changes Are Maintained Under All Conditions

35000 cfs 2030 2070 Wet Moderately Warm Store Release No Change Store Release No Change

3500 cfs

350 cfs 24% of Time 38% of Time 38% of Time 28% of Time 36% of Time 36% of Time

2070 2070 Dry Extremely Warm 35000 cfs Store Release No Change Store Release No Change

3500 cfs

350 cfs 24% of Time 36% of Time 40% of Time 23% of Time 39% of Time 38% of Time Temperature Improvement for Eggs and Incubation

Release Water Temperature - 2030 Simulation Adult Migration

Rearing and Juvenile Migration

Eggs and Incubation

Fewer releases exceed objective 12% temperature Water Temperature Improves Under All Conditions Floodplain Activation is Improved

Change in Floodplain Activation - 2030 Simulation SJRRP Percentage Change (-50% to 50%) EDT Reach Description Reach Wet Normal-Wet Normal-Dry Dry SJR 1A1 Friant Dam to Hwy 41 -14% 64% 36% 25% SJR 1A2 Hwy 41 to Hwy 99 -12% 71% 40% 27% 1 SJR 1B1 Hwy 99 to Hwy 145 (Madera Ave.) -1% 82% 45% 32% SJR 1B2 Hwy 145 (Madera Ave.) to Gravelly Ford 7% 88% 50% 35% SJR 2A Gravelly Ford to Chowchilla Bypass 11% 91% 52% 36% 2 SJR2B1 Chowchilla Bypass to Mendota Bypass 13% 92% 52% 36% Mendota Dam Mendota Bypass N/A N/A N/A N/A SJR 3B Mendota Bypass return to Avenue 7.5 8% 69% 35% 47% 3 SJR 3C Avenue 7.5 (Firebaugh) to Sack Dam 8% 69% 35% 47% SJR 4A1 Sack Dam to Hwy 152 8% 80% 47% 86% SJR 4A2 Hwy 152 to Sand Slough Connector 8% 80% 47% 86% 4 SJR4B 1A & 1B Sand Slough Connector to Turner Ave 0% 0% 0% 19% SJR4B 1C and 1D Turner Ave to Mariposa Bypass 0% 0% 0% 19% SJR 4B2 Mariposa Bypass to Bear Creek 6% 80% 47% 86% SJR 5A Bear Creek to Salt Slough 1% 79% 36% 69% 5 SJR 5B Salt Slough to Mud Slough 3% 73% 27% 44% SJR 5C Mud Slough to Merced River 3% 54% 15% 34% Floodplain Activation Improved Under All Conditions

Percentage Change (-50% to 50%) SJRRP EDT Reach Description Reach 2030 2070 2070 WMW 2070 DEW

SJR 1A1 Friant Dam to Hwy 41 24% 15% 8% 15% SJR 1A2 Hwy 41 to Hwy 99 26% 16% 7% 16% 1 SJR 1B1 Hwy 99 to Hwy 145 (Madera Ave.) 29% 18% 6% 18% SJR 1B2 Hwy 145 (Madera Ave.) to Gravelly Ford 31% 18% 6% 19% SJR 2A Gravelly Ford to Chowchilla Bypass 32% 19% 6% 20% 2 SJR2B1 Chowchilla Bypass to Mendota Bypass 32% 19% 6% 20% Mendota Dam Mendota Bypass N/A N/A N/A N/A SJR 3B Mendota Bypass return to Avenue 7.5 29% 14% 12% 15% 3 SJR 3C Avenue 7.5 (Firebaugh) to Sack Dam 29% 14% 12% 15% SJR 4A1 Sack Dam to Hwy 152 31% 20% 17% 19% SJR 4A2 Hwy 152 to Sand Slough Connector 31% 20% 17% 19% 4 SJR4B 1A & 1BSand Slough Connector to Turner Ave 0% 0% 0% 0% SJR4B 1C and Turner Ave to Mariposa Bypass 0% 0% 0% 0% SJR 4B2 Mariposa Bypass to Bear Creek 31% 20% 17% 19% SJR 5A Bear Creek to Salt Slough 46% 13% 7% 14% 5 SJR 5B Salt Slough to Mud Slough 31% 2% -2% 3% SJR 5C Mud Slough to Merced River 14% -7% -10% -6% Significant Fishery Abundance Improvement Summary of Net Physical Changes

BENEFIT TYPE PHYSICAL EFFECT UNIT 2030 2070

Ecosystem Change in Spring-Run Chinook abundance % 24 231

Ecosystem Level 4 Refuge supply in dry & critical years TAF/yr 10 7

Emergency Response Water supply for Delta export disruption TAF 245 247 PUBLIC

Flood Control Increase in incidental flood space TAF 63 106

Recreation Thousands of visitor-days at Millerton/TFR days 116 127

Water supply Long term average TAF/yr 197 257 PUBLIC Hydropower Generation change at Friant Dam GWh/yr 13.8 13.2 NON- Public & Non-Public Benefits Increase and Sustain

Public Benefit Ratio 2.86 Benefit Cost Ratio 1.42 Temperance Flat Adds Flexibility in the Water System

Refuge water program can store water in wet years for later use in dry years SJRRP can more flexibly manage releases, such as pulse flows and ramping to establish riparian habitat

South-of-Delta users can move stored water from San Luis Reservoir to TFR with low risk of loss East Side users can improve coordinated management with groundwater and local supplies

Emergency supply south of the Delta location provides flexibility in response to a Delta outage Flexibility With Potential Water System Improvements

• Friant-Kern and Madera canal capacity restoration • Friant-Kern Canal reverse flow (pump-back) project • Local water storage projects • San Luis Reservoir modifications • Delta-Mendota Canal Recirculation Project • Trans-Valley Canal • California WaterFix Project Timeline

Final Draft Final Permitting Start Start Reservoir Fully EIS EIR EIR Complete Construction Filling Operational 2033

2018 2020 2021 2022 2024 2030 2033

Permitting Public Benefits Public Benefits Federal State Local Begin Fully Realized • USACE • CDFW • Fresno Co. • NMFS • SWRCB • Madera Co. • ACHP • DOC • Air Quality • USFW • Caltrans • BLM • State Lands

Final Project Definition Pre-Construction Investor Operating Plan 30%, 60%, 90%, Final Design Cost-Share Contracts Bid Package Administrative Agency Contracts Acquisition