Addendum No. 2 to the Final Environmental Impact Report Santa Ana River Water Right Application for Supplemental Water Supply, SCH NO. 2002071062 for the Revisi

Addendum No. 2 to the Final Environmental Impact Report Santa Ana River Water Right Application for Supplemental Water Supply, SCH NO. 2002071062 for the Revisi

This document is prepared as Addendum No. 2 to a previously certified environmental document: the FEIR Santa Ana River Water Right Application for Supplemental Water Supply. San Bernardino Valley Municipal Water District re-designed a portion of the facilities subsequent to their approval to avoid power poles and sensitive riparian habitat of concern to CDFW, and it is these revised facilities that are the focus of the Addendum. The District seeks to add modified facilities to an operating water diversion recharge system that are needed to capture and recharge up to 80,000 afy of local stormwater, which is a primary water management strategy of the Upper Santa Ana River Watershed Integrated Regional Water Management Plan. The specific project components include the following new facilities: 1) New Water Conservation District Channel - return flow to existing WCD channel, 2) New Access Roads; and the following revised facilities: 1) Sandbox Diversion/Inlet Structure, 2) Sedimentation Basin, 3) Plunge Pool Pipeline, 4) Outlet Structure. The specific Project components summarized above are designed to assist the District to meet the aforementioned goals based on capture and recharge of high quality stormwater runoff in the upper portion of the Watershed during wet years, with a focus on the provision of sufficient conveyance facilities to take advantage of the highly variable flows in the Santa Ana characterized by periodic large floods and longer periods of low flows. In essence, the proposed project is a conjunctive use project that will store available stormwater flows in wet years within the Bunker Hill regional aquifer for later extraction for wells in dry years.

San Bernardino