Groundwater Sustainability Plan - Draft Components
The Groundwater Sustainability Plan (GSP) is the detailed roadmap for how the Cosumnes Subbasin will reach long-term sustainability. The Draft GSP will be released mid-August 2021 for public review and comment. The Final GSP is due to the State by January 2022.
We also recommend visiting the Groundwater Exchange for a wealth of information including factsheets and brochures
The purpose of this webpage is to provide an early look at the draft technical components of the draft GSP and other helpful resources. The GSP is a highly technical and complex document, and the seven Cosumnes Subbasin Groundwater Sustainability Agencies (GSAs) wanted to provide the draft material to enable interested parties to begin to orient themselves with the technical information prior to the release of the Draft GSP.
Several of these resources (e.g., draft technical memos) are the initial draft documents. They do not yet incorporate comments provided by the GSAs and other stakeholders from earlier discussions.
Given these materials are in the process of being updated, we are not currently accepting comments from the public on these draft documents. Rather, as noted above, the Draft GSP will be released mid-August 2021 for public review and comment.
Navigating this webpage
There are four main sections of this page: (1) Additional background information related to the draft GSP content; (2) Draft GSP components and other resources; (3) GSP development timeline and opportunities for public input; and (4) Methods for providing input.
BACKGROUND INFORMATION for the COSUMNES SUBBASIN GSP
Learn more about the GSP by clicking on the questions below:
A GSP must assess groundwater quantity and determine if there is a balance between water coming in and water leaving the subbasin. If it is determined that groundwater supplies are being depleted over time, the Plan must contain a strategy to reverse this trend and ensure long-term sustainability of the water available to businesses, residences, farms, ranches and ecosystems.
The GSP must also assess groundwater quality, surface water depletion, land subsidence and other sustainability indicators and propose measures to correct any “undesirable results.”
The detailed and technical information in the GSP will be largely based on Technical Memorandums (TMs) that the technical consultant, EKI Environment & Water, Inc., has been developing in coordination with GSAs, stakeholders, and other experts. Refer to the question below to learn more about these Technical Memos.
Outline of the GSP
View/download a detailed annotated GSP outline – [Click here]
General GSP Outline:
|Chapter 1. Introduction|
|1.1. Purpose of the GSP|
|1.2. Sustainability Goal|
|1.3. Agency Information / Governance Description|
|1.4. GSP Organization|
|Chapter 2. Plan Area and Basin Setting – Describing the basin conditions|
|2.1. Description of Plan Area|
|2.2. Basin Setting|
|Chapter 3. Sustainable Management Criteria – Defining basin sustainability|
|3.1. Sustainability Goal|
|3.2. Measurable Objectives|
|3.3. Minimum Thresholds|
|3.4. Undesirable Results|
|3.5. Monitoring Network & Protocols|
|Chapter 4. Projects & Management Actions – Identifying how to achieve sustainability goal|
|4.x. Projects and MAs Development|
|Chapter 5. Plan Implementation – Describing how to implement the GSP|
|5.1. Estimate of GSP Implementation Costs|
|5.2. Schedule of Implementation|
|5.3. Annual Reporting|
|5.4. Periodic Evaluation|
|Chapter 6. References and Technical Studies|
The detailed and technical information in the GSP will be largely based on Technical Memorandums (TMs) that the technical consultant, EKI Environment & Water, Inc., has been developing in coordination with GSAs, stakeholders, and other experts. Whenever an initial draft TM was completed, the draft was provided to the GSAs and stakeholders for review and comment. Feedback has been collected and will be incorporated into the Draft GSP (expected release: August 2021).
List of Technical Memos (TMs):
- TM 1 – Data Management System Evaluation and Selection (working draft as of 11/2018)
- TM 2 – Data Compilation and Data Gaps Assessment (working draft as of 6/2019)
- TM 3 – Numerical Groundwater Model Evaluations and Recommendations (working draft as of 12/2018; revision 9/2019)
- TM 4 – Not applicable – [does not exist; removed from initial scope of work]
- TM 5 – Stakeholder Communication and Engagement Plan (working draft as of 3/2019)
- TM 6 – Groundwater Conditions and Hydrogeologic Conceptual Model (working draft as of 11/2019)
- TM 7 – Not applicable – [does not exist; removed from initial scope of work]
- TM 8 – Water Budget and Preliminary Estimate of Sustainable Yield (working draft as of 5/2021)
- TM 9 – Summary of Monitoring Network Assessment and Preliminary Monitoring Plan (working draft as of 4/2020)
- TM 10 – Delineation of Management Areas (short paragraph will be included in the Draft GSP as the GSAs decided to not delineate Management Areas)
- TM 11 – Establishment of Sustainability Criteria (working draft as of 3/2021)
- TM 12 – Proposed Projects and Management Actions (working draft as of 4/2021)
- TM 13 – GSP Implementation Plan (draft expected 6/2021)
- TM 14 – Proposed Monitoring Network and Protocols (based on TM 9, will be updated for Draft GSP)
As previously mentioned, this webpage provides the initial draft Technical Memos and draft GSP chapters and does yet not incorporate GSA comments or more current/new information since their initial release. The Draft GSP (expected August 2021) will represent complete drafts of all these Technical Memos, and we will be seeking public input on those drafts to ensure interested stakeholders and members of the public are able to comment on the most up-to-date versions.
We understand this can be confusing to post “outdated” drafts; however, we wanted to help people begin to orient themselves with the technical content (even if content is not fully up to date) prior to release of the Draft GSP. We have also provided other resources to help capture additional or new information where possible.
Staying involved is crucial to develop and implement the GSP! The section at the bottom lists multiple opportunities for you to provide your input during the GSP development process.
DRAFT GSP CONTENT and OTHER RESOURCES
Introduction & Administrative Information
Purpose of the GSP | Sustainability Goal | Agency Information and Governance Description | GSP Organization
- Draft Intro Chapter has been reviewed by GSAs as part of Plan Area Chapter review (Feb 2021)
- The Long-Term Governance Committee is currently developing a draft Joint Powers Authority document for the Working Group to review (draft estimated to be shared in June 2021)
General Informative / Educational Materials
- SGMA Brochures – Understanding the Law | GSP Regulations | State Intervention
- SGMA Videos – Intro to the New Law (11 min) | Local Management under SGMA (9 min)
Cosumnes Subbasin Materials
- Presentation Slides – Concept of Sustainability Goal presented to Working Group 12/2020 – (starting on Slide 11)
- Presentation Slides – Draft Sustainability Goal statement – (starting on Slide 16)
- Cosumnes Handout – Subbasin Map | GSA Contacts | Mini-Glossary