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Imperial Integrated Regional Water Management Plan

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On September 23, 2008 the IID Board of Directors adopted a strategic plan tasking the Water Department to develop an Integrated Water Resources Management Plan (IWRMP, IID Plan) to assist in meeting future water resource demands. On September 29, 2009, the IID board accepted the findings of the draft IWRMP (draft IID Plan) and authorized development of the Imperial Integrated Regional Water Management Plan (Imperial IRWMP) to further these efforts and to assist regional water planning efforts through a process conforming to California Department of Water Resources guidelines. 

The Water Department prepared documentation, Imperial IRWMP Regional Acceptance Process (RAP, April 2009), that defined boundaries for the Imperial Region and identified how the region met CDWR guidelines. The Chairman of the Imperial County Board of Supervisors and the President of the IID Board of Directors signed the April 28, 2009 cover letter submitting the RAP to CDWR. Upon review, CDWR approved the Imperial Region for the purposes of preparing an IRWMP and applying for a Proposition 84 Planning Grant. IID subsequently applied for and in 2011 was awarded a Proposition 84 IRWM Planning Grant.

The Water Forum: On June 24, 2010, IID and the County convened a Water Forum comprised of IID, Imperial County and Imperial Region cities and other stakeholders. The Water Forum undertook an extensive process to develop the Imperial IRWMP, with stakeholders reviewing regional conditions and requirements as well as methods for water supply augmentation including water storage and banking, recycling of municipal wastewater, and desalination of brackish water. Water storage and banking have the potential to benefit both agricultural and non-agricultural users, while other IID and municipal capital projects would be implemented primarily to meet requirements for new non-agricultural projects that have a demand higher than was previously delivered to the development footprint.  

In November 2012, the Imperial County Board of Supervisors adopted the IRWMP, and in December 2012, the City of Imperial City Council and the IID Board adopted the plan (IID Resolution 43-2012). Adoption by IID, the County and the City of Imperial meets the basic requirement of CDWR for an IRWM plan. The Water Forum authorized the City of Imperial to serve as the Proposition 84 grant administrator.

Until the IID board selects and implements such capital development projects, IID provides water to new non-agricultural projects under the terms of the Equitable Distribution Plan and the Interim Water Supply Policy for Non-Agricultural Projects which is incorporated into the 2012 Imperial IRWMP by reference.

Click here to review the Imperial Integrated Region Water Management Plan Website.

VoLume 1 - IRWM Plan

Table of Contents

Executive Summary
Chapter 1 Introduction
Chapter 2 Imperial Region Planning Environment
Chapter 3 Governance, Stakeholder Involvement, and Outreach
Chapter 4 Region Description and Baseline Conditions
Chapter 5 Supply, Demand, and Water Budget
Chapter 6 Review of Resource Management Strategies
Chapter 7 Increase Water Supply
Chapter 8 Reduce Water Demand - Increase Water Use Efficiency
Chapter 9 Improve Flood Management
Chapter 10 Improve Water Quality
Chapter 11 Practice Resources Stewardship and Other Strategies
Chapter 12 Review of Project, Program/Policy and Funding Alternatives
Chapter 13 Implementation Plan
Chapter 14 Measuring Plan Performance and Data Management

Table of Figures

List of Tables

Acronyms

Volume 2 - appendices

Table of Contents
Appendix A Governance and Plan Adoption
Appendix B Desalination/Groundwater Development Feasibility Study
Appendix C Disadvantaged Community Needs Assessment Technical Memorandum
Appendix D Historical and Future Demands
Appendix G Drain Water Volume
Appendix H Treatment Plants-Cost Model
Appendix J IID Supporting Guidelines for the Determination of Wholesale Water Sustainability
Appendix K Ranking and Evaluation Criteria
Appendix L Imperial Irrigation District Power Plant Water Use Evaluation
Appendix M Groundwater Blending Analysis
Appendix N IID Capital Projects
Appendix O Vulnerability to Climate Change and Evaluation of Greenhouse Gas Emissions
Appendix P

Groundwater Management Planning Elements Guidance Document

Appendix Q Imperial IRWMP Stakeholder Assessment
Appendix R Public Comments to Imperial IRWMP Public Review Draft of July 2012

Please Note: Appendices E, F, & I are intentionally omitted from the Final Imperial IRWMP. See Volume 2 APPENDICES Table of Contents for details.

Addendum
Cover Letter - Addendum to the October 2012 Imperial IRWM Plan Addressing Deficiencies based on November 2012 Guidelines
IRWM Plan Addendum 1

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