Kern Fan Groundwater Storage Project Presentation to the California Water Commission July 24, 2018

Presentation Overview Project Overview and Benefits Preferred Funding Allocation Approach Potential Allocation of Funding Shortfall and Impacts

Project Highlights Groundwater storage project with: New conveyance from California Aqueduct 1,050 acres of recharge basins 12 groundwater recovery wells Store water otherwise lost to the ocean Improve flexibility in operation of State’s water system Existing partnerships with State Water Contractors Dudley Ridge Water District Kern County Water Agency

Project Benefits Public Benefits Spring and Winter-run Chinook Salmon Survival Intermittent Wetland Habitat Drought Emergency Water Supply Delta Failure Non-Public Benefits Additional water supply Supplemental Public Benefits Steelhead Trout Survival

Project Provides Early Public Benefits Phase 1 operational by February 2023 Project can borrow water from applicants to begin providing public benefits as soon as it is operational in 2023 Project completed by 2025

Impact of Potential Funding Allocations to Kern Fan Project Proposed Cost Allocation WSIP Funding Applicant Cost-Share Applicant Percent Cost Share Impact to Kern Fan Project Preferred Approach: Largest Request Absorbs Shortfall $85.66 $85.67 50% None Proportionate to Funding Request $74.53 $97.80 56% Significant impacts to rate payers MCED Assigned by Application Score $62.70 $108.63 63% Substantial impacts to rate payers 50:25:25 Distribution $49.10 $122.23 71% Serious impacts to rate payers All values in $ millions

Benefits of Preferred Approach to Allocate Shortfall Fully fund smaller projects and allocate shortfall to largest funding request Smaller projects can be operational and deliver public benefits sooner If any higher ranked projects fail to progress and unused funding becomes available in the future it could be allocated to largest project Other potential approaches Rate impacts to applicant Smaller projects may not be able to benefit from possible future WSIP funding due to timing and scale

Contact Information Rosedale Rio Bravo Water Storage District: Eric Averett General Manager Office: (661) 589-6045 eaverett@rrbwsd.com Irvine Ranch Water District: Paul Weghorst Executive Director of Water Policy Office: (949) 453-5632 weghorst@irwd.com Fiona Sanchez Director of Water Resources Office: (949) 453-5325 sanchezf@irwd.com Dan Bartel, P.E. Engineer/Assistant Manager Office: (661) 589-6045 dbartel@rrbwsd.com