Geologic Analysis, Ventura River Watershed

Daniel B. Stephens & Associates, Inc. (DBS&A) | March 3rd, 2020

 This memorandum summarizes geologic analysis performed for the Ventura River Watershed (VRW) by Daniel B. Stephens & Associates, Inc. (DBS&A) in support of nume

 This memorandum summarizes geologic analysis performed for the Ventura River Watershed (VRW) by Daniel B. Stephens & Associates, Inc. (DBS&A) in support of numerical model development. The geologic analysis presented herein will be used, in conjunction with other information as described in the project Study Plan (Geosyntec and DBS&A, 2019), to assign three-dimensional model layer geometry, initial model hydraulic properties (e.g., hydraulic conductivity), and the presence of boundary conditions. This geologic analysis is based on data available to DBS&A at the time the analysis was conducted. We anticipate that development of the VRW geologic conceptual model may be revised as additional data becomes available and as numerical model development proceeds. 

Grassland Groundwater Sustainability Agency Groundwater Sustainability Plan

Grassland Groundwater Sustainability Agency (GGSA) | January 17th, 2020

*Cover gives draft date of December but consulting engineer signature is for 1/17/2020

*Cover gives draft date of December but consulting engineer signature is for 1/17/2020

Grassland Groundwater Sustainability Agency Revised Groundwater Sustainability Plan

Grassland Groundwater Sustainability Agency (GGSA) | July 8th, 2022

This GSP, including the Common Chapter, has been revised (changes are shown in Appendix G) to address items of concern raised by DWR in its initial “Incomplete” Deter

This GSP, including the Common Chapter, has been revised (changes are shown in Appendix G) to address items of concern raised by DWR in its initial “Incomplete” Determination Letter dated January 21, 2022. Every effort was made to ensure that this revised GSP and the revised Common Chapter are consistent. In the event of an inconsistency, the revised Common Chapter controls. The Grassland Plan Area will continue to be sustainable by maintaining the historically balanced groundwater system in order to avoid causing significant and unreasonable undesirable impacts to beneficial users of groundwater as they relate to the six sustainability indicators. The Plan Area participants are committed to continued coordination with neighboring GSP areas and neighboring subbasins in order to aid in the localized and statewide groundwater sustainability goals as defined by each GSP and Subbasin. Due to size, this file has been divided. Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7

Gravelley Ford Water District Groundwater Sustainability Plan

Gravelly Ford Water District (GFWD) | August 12th, 2019

Gravelly Ford Water District Groundwater Sustainability Plan

Gravelly Ford Water District (GFWD) | June 28th, 2022

This Plan is for the Gravelly Ford Groundwater Sustainability Area, one of seven components of the Madera Subbasin. It encompasses approximately 8,500 acres; its boundari

This Plan is for the Gravelly Ford Groundwater Sustainability Area, one of seven components of the Madera Subbasin. It encompasses approximately 8,500 acres; its boundaries are coterminous with those of the Gravelly Ford Water District (District). Grape vineyards, nut tree groves, and on-farm rural residences are the only land uses in the Area. The District has from the beginning bee’n a conjunctive use operation with the import of surface water for both recharge and irrigation. The management of this operation has been to utilize the maximum amount of available surface waters prior to using groundwater for the production of crops.

Gravelly Ford Water District Groundwater Sustainability Plan

Gravelly Ford Water District (GFWD) | March 19th, 2023

In 2022, the Technical representatives for the four GSPs representing the seven GSAs in the Madera Basin started meeting to revise the four GSP Plans to resolve deficienc

In 2022, the Technical representatives for the four GSPs representing the seven GSAs in the Madera Basin started meeting to revise the four GSP Plans to resolve deficiencies identified by the DWR in their review of the four GSP plans as stated in the September 2022 Incomplete determination letter. During the period from September 2022 through March 2023 the group also had meetings with DWR staff to establish direction on the recommendations in the DWR Incomplete letter. This Incomplete letter established a 180-day period to provide a revised GSP to address the deficiencies. The Technical group developed a corrective action plan to address the items identified by DWR staff in the Incomplete letter to address the noted deficiencies. During the last quarter of 2022 and the first quarter of 2023 the four GSPs revised their individual plans to coordinate approaches and methodologies that would provide similar language and approach across the Madera Subbasin, those items being: • Resolve the potential deficiencies identified by DWR in their September 2022 incomplete determination letter, and discussed during five DWR consultation meetings between November 2022 and January 2023; • Summarize the progressive implementation actions taken by the GSAs since submission of the GSP in January 2020; • Recognize the Madera Subbasin GSAs’ clear and formal commitment to fund and implement a Domestic Well Mitigation Program beginning no later than January 1, 2024, including the execution of a memorandum of understanding (MOU); and • Reaffirm their commitment to implementing the GSP and achieving sustainable groundwater conditions by 2040.

Greater Kaweah Groundwater Sustainability Agency 2022 First Amended Groundwater Susteainability Plan

Greater Kaweah Groundwater Sustainability Agency (GKGSA) | July 20th, 2022

Due to size, this file has been divided. Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7, Part 8, Part 9, Part 10

Due to size, this file has been divided. Part 1, Part 2, Part 3, Part 4, Part 5, Part 6, Part 7, Part 8, Part 9, Part 10

Groundwater Flow Model of the East and South Las Posas Sub-Basins – Preliminary Draft Report

Calleguas Municipal Water District (CMWD) | ?

INTERA Incorporated (INTERA) was retained by the Calleguas Municipal Water District (CMWD) to develop a numerical groundwater model of the East Las Posas Management Area

INTERA Incorporated (INTERA) was retained by the Calleguas Municipal Water District (CMWD) to develop a numerical groundwater model of the East Las Posas Management Area (ELPMA), which includes the locally-recognized east and south sub-basins of the Las Posas Valley Basin (LPVB). Groundwater in the ELPMA is found in a multiple-aquifer system characterized by intense faulting and folding, which is known to exert structural controls on groundwater flow and movement. The ELPMA is known to receive recharge from surface water flows in Arroyo Las Posas/Simi that runs east to west along the southern edge of the basin. Flows in the Arroyo have become perennial as a result of discharges from wastewater treatment plants and dewatering wells within and upstream of the ELPMA. Hence, understanding and modeling the surface-water/groundwater interaction along the Arroyo is an important component of the numerical model development. CMWD also owns and operates the Las Posas Basin Aquifer Storage and Recovery (ASR) Project, consisting of eighteen high capacity ASR wells and associated facilities located in the ELPMA that are used to inject and recover potable water purchased from Metropolitan Water District of Southern California (Metropolitan). Basin response to injection/extractions at the ASR well fields and the evaluation of storage capacity of the ASR well field are key considerations for this modeling project. 

Groundwater Management and Safe Drinking Water in the San Joaquin Valley

Water Foundation | June 2nd, 2020

Groundwater Sustainability Assessments: A Review of the Department of Water Resources’ Determinations on Groundwater Sustainability Plans in Critically Overdrafted Basins

Groundwater Leadership Forum (GLF) | August 31st, 2022

Of the 46 GSPs submitted in January 2020, the Department of Water Resources (DWR) determined eight GSPs to be adequate and 34 GSPs to be incomplete. In this paper we eval

Of the 46 GSPs submitted in January 2020, the Department of Water Resources (DWR) determined eight GSPs to be adequate and 34 GSPs to be incomplete. In this paper we evaluate to what extent DWR’s determinations provide oversight on the key issues of drinking water, disadvantaged communities, the environment, stakeholder involvement,and climate change. We summarize the corrective actions that DWR is recommending or requiring, as well as compare DWR’s determinations to the assessment of 31 GSPs that we conducted in 2020. We also reviewed the 11 comment letters submitted by the State Water Resources Control Board (SWRCB), 25 comment letters submitted by the California Department of Fish and Wildlife (CDFW), and seven comment letters submitted by the National Oceanic and Atmospheric Administration’s National Marine Fisheries Service (NMFS) to compare deficiencies identified in GSPs across agencies.