Eastern Municipal Water District
California

Action/Info Item
4100

Lakeview Subbasin Groundwater Banking and Conjunctive Use Initial Feasibility Study

Information

Department:Groundwater Management & Facilities PlanningSponsors:
Category:Action/Info ItemMeeting Workflows:Board Planning Committee Workflow

Attachments

  1. Printout
  2. Presentation

Background

The Lakeview Subbasin Groundwater Banking and Conjunctive Use Program may potentially provide a new potable water supply and prevent the migration of lower quality groundwater from the Perris South Subbasin into the Lakeview Subbasin.

 

In January 2019, Woodard & Curran was selected to investigate the initial feasibility of using the Lakeview Sub basin for water banking and conjunctive use of imported water from the Metropolitan Water District of Southern California. This initial feasibility investigation consisted of a high-level review of currently available data consisting of well drilling logs, aerial image analysis, engineering drawings, and groundwater flow model analysis.  Two feasible recharge locations were identified (east and west recharge sites) as well as estimated recharge and extraction rates, potential storage volumes, and initial program costs.  Additionally, the investigation provided estimated locations for up to eight groundwater production wells.

 

Model analyses indicate the 63 acre east recharge site has a potential to recharge up to 10,000 acre-feet per year (AFY) for put and take operations, while the 70 acre west recharge site has a potential to recharge up to 15,000 AFY. Due to underground recharge constraints, only one of the two potential recharge sites can be used for this program.  Initial estimates of capital and operational and maintenance costs are consistent with other water banking/conjunctive use programs.

 

The completed initial investigation identified data needs for a final feasibility study which will include field investigations to better define the following program elements:

 

·         Construction feasibility and the preferred recharge site;

·         Recharge capacity and operating scenarios;

·         Depth to bedrock and ability of soil to move water away from recharge sites; and

·         If acquisition of land from multiple property owners from the West Recharge Site is feasible

 

The results of the field investigation will also support the development of planning level cost estimates for construction, operation and maintenance.

Financial/Strat Plan/Enviro

FINANCIAL IMPACT:

This project will be financed from the Special Projects Budget.

 

STRATEGIC PLANNING GOAL/OBJECTIVE:

Water Supply Diversity and Reliability: Develop and implement a portfolio of projects and management techniques to achieve a reliable and cost-effective balance of water supplies utilizing imported, local and recycled water sources.

 

ENVIRONMENTAL IMPACT:

This study is exempt from the California Environmental Quality Act (CEQA) as authorized under the California Code of Regulations, Title 14, Chapter 3, Section 15262, which provides exemption for planning studies.

Recommendation

This item is informational only.

Meeting History

Dec 12, 2019 3:30 PM  Board Planning Committee Regular Meeting
draft Draft
RESULT:DISCUSSED AT COMMITTEE
Feb 19, 2020 3:00 PM  Board of Directors Special Meeting
draft Draft

Mr. Powell provided a presentation on this item