Yolo Subbasin GSA - 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN, 5-021.66 SACRAMENTO VALLEY - SOLANO, 5-021.67 SACRAMENTO VALLEY - YOLO

Yolo Subbasin GSA - 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN, 5-021.66 SACRAMENTO VALLEY - SOLANO, 5-021.67 SACRAMENTO VALLEY - YOLO

A. Applicant Information

Requesting Agency Information
Agency Name: Yolo Subbasin GSA
Address: 34274 State Highway 16
City: Woodland Zip: 95695
Work Phone: (530) 662-0265 Cell Phone:
Email: ksicke@ycfcwcd.org Fax:
Revision Request Manager Information
Person Name: Kristin Sicke
Address: 34274 State Highway 16
City: Woodland Zip: 95695
Work Phone: 5306620265 Cell Phone:
Email: ksicke@ycfcwcd.org Fax:
 

B. Description of Proposed Boundary Modification

  1. Internal Jurisdictional Modification to Incorporate RD 150, RD 307, & RD 999 into the Yolo Subbasin
    • Jurisdiction Internal
  2. The boundary modification request is meant to move the internal boundary line between Yolo and Solano Subbasin to bring Yolo County-reclamation districts into the Yolo Subbasin. At this time, RD 150 and RD 999 are requesting incorporation into the Yolo Subbasin, and RD 307 plans to join the proposed North Delta Subbasin. Should the proposed North Delta Subbasin not be approved by DWR, the YSGA is interested in incorporating RD 307 into the Yolo Subbasin so as to not create any islands.
    • 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN
    • 5-021.66 SACRAMENTO VALLEY - SOLANO
    • 5-021.67 SACRAMENTO VALLEY - YOLO

C. Initial Notification and Combination of Requests

  1. Yes
    Local Agency Potential Basin(s)/Subbasin(s)
    Sloughhouse Resource Conservation District 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN , 5-022.16 SAN JOAQUIN VALLEY - COSUMNES
    Omochumne-Hartnell Water District 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN , 5-022.16 SAN JOAQUIN VALLEY - COSUMNES
    Northern Delta GSA 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN , 5-022.01 SAN JOAQUIN VALLEY - EASTERN SAN JOAQUIN , 5-021.66 SACRAMENTO VALLEY - SOLANO
    Omochumne-Hartnell Water District 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN , 5-022.16 SAN JOAQUIN VALLEY - COSUMNES
    5-021.66 SACRAMENTO VALLEY - SOLANO , 5-021.65 SACRAMENTO VALLEY - SOUTH AMERICAN , 5-022.01 SAN JOAQUIN VALLEY - EASTERN SAN JOAQUIN
    Yolo County Flood Control And Water Conservation District 5-021.52 SACRAMENTO VALLEY - COLUSA , 5-021.67 SACRAMENTO VALLEY - YOLO , 5-021.66 SACRAMENTO VALLEY - SOLANO
    5-021.67 SACRAMENTO VALLEY - YOLO , 5-021.66 SACRAMENTO VALLEY - SOLANO
    5-022.15 SAN JOAQUIN VALLEY - TRACY , 5-021.66 SACRAMENTO VALLEY - SOLANO
  2. No

D. Required Documents for All Modifications

This basin boundary modification request is exempt from CEQA.

E. General Information

Bounded on the east by the Sacramento River and and the eastern boundary of Reclamation District (RD) 150 and the eastern boundary of RD 307, and bounded on the south by the Yolo County/Solano County line and the northern boundary of RD 2068 and southern boundary of RD 999. Bounded on the north by the Colusa County/Yolo County line, and bounded on the west by the Capay Valley and the Coast Range. The geologic structure of the groundwater subbasin is dominated by an anticlinal ridge oriented northwest to southeast, which is expressed at the surface as the Dunnigan Hills and Plainfield Ridge. The definable bottom has yet to be defined for the entire Yolo Subbasin, since it was recently revised there has not been an updated hydrogeological conceptual model. Please see the Bulletin-118 (2003) description for more information: https://water.ca.gov/LegacyFiles/pubs/groundwater/bulletin_118/basindescriptions/5-21.67.pdf

F. Notice and Consultation

Local Agencies directly affected: Yolo Subbasin Groundwater Agency, Reclamation Districts (RDs) 150, 307, and 999, and Solano Subbasin Groundwater Sustainability Agency. Local agencies indirectly affected: Solano County, Sacramento County, Sacramento Central Groundwater Authority, Franklin Drainage District, and RDs 349, 501, 551,744, 755, 813, 1667.
During the development of the YSGA, staff did their due diligence to track local agencies and water agencies within the County and has maintained a stakeholder coordination list since that effort. There has been coordination with the Solano Subbasin via the Solano County GSA and County of Solano and American Subbasin via the Sacramento Central Groundwater Authority and Sacramento County. There have been numerous discussions with The Freshwater Trust about the potential North Delta Subbasin.
The YSGA has been in constant communication with RD 307 and worked diligently over the past year to inform them of their option to join the Yolo Subbasin. The YSGA has also maintained communications with Solano Subbasin GSA and Solano County and provided the attached formal letters of intent regarding the modification and fate of RD 307. RD 999 and RD 150 have been made aware of the YSGA's timeline and intention, and both agencies authorized joining the Yolo Subbasin in October 2017 (as provided in the notice of intent to DWR). Numerous emails and phone calls took place during the consultation period. Additionally, since the BBM request considers a second option or "backup plan", the YSGA has consulted with Sacramento County and Sacramento Central Groundwater Authority regarding the impact to South American Subbasin if the proposed North Delta Subbasin does not work out. Currently, the Yolo Subbasin would become the South American Subbasin's neighbor to the west of the County line.
Coordination activities for the Basin Boundary Modification and the YSGA's intention in requesting a modification were reported during 2018 YSGA Board Meetings within the Executive Officer's Report. At the June 18, 2018 YSGA Board meeting, the Directors formally considered the proposed modification and passed the attached resolution authorizing the basin boundary modification. YSGA staff will also be providing an update on the BBM efforts at the YSGA's September 17, 2018 Board meeting.
There were no comments received by the YSGA regarding the proposed basin boundary modification.

G. General Existing Groundwater Management

All requests for jurisdictional modification pursuant to Section 342.4 MUST include responses to the following questions.
Currently sustainable groundwater management has existed for the past 25 years through the Water Resources Association of Yolo County, which consists of local water agencies in Yolo County who have proactively monitored groundwater and conjunctively managed the County's water supplies. The Water Resources Information Database (WRID) consists of 110 groundwater wells that monitor groundwater levels within the Subbasin on a biannual basis. There have been dozens of groundwater management reports written over the past 30 years and the empirical data and supporting documentation will all be helpful in developing the Yolo Subbasin GSP. The Cities of Woodland and Davis have recently acquired surface water rights, taking pressure off of the County's groundwater reliance, and water managers are continually examining new ways to bring surface water supplies into the County to optimize conjunctive use.
The Yolo Subbasin Groundwater Agency (YSGA) plans to continue relationships with neighboring subbasins and will formalize relationships and responsibilities with individual coordination agreements. The YSGA plans to share all data and resources with neighboring subbasins to best understand the underground flow patterns across boundaries. By reducing the number of GSAs within Yolo County, the YSGA is streamlining SGMA implementation and providing for centralized management between larger agencies.
Historical groundwater level data can be found for individual wells on the Yolo Groundwater website: http://yologroundwater.org/index.php/313-2/ Also, historical groundwater level data for all wells that are monitored on a biannual basis can be found on the Yolo Groundwater website: http://yologroundwater.org/index.php/2018/04/20/spring-2018-groundwater-levels-in-the-ycfcwcd-service-area/
Since the YSGA is streamlining SGMA implementation and providing for centralized management between larger agencies by reducing the GSAs within Yolo County, there will be great benefit to CASGEM and the development of the Yolo Subbasin GSP. The YSGA is the ME for CASGEM for the entire County and already covers RD 150, RD 307, and RD 999's service areas. Improved management will be the result of the consolidation.

H. Local Support

All requests for boundary modification must include the following:
As discussed in Section F - Notice and Consultations, letters were provided to local agencies that would be directly and indirectly affected by the subbasin boundary modification. Additionally, there were numerous phone conversations and meetings with RD 307 and The Freshwater Trust regarding the fate of RD 307.
To-date, there have been no letters of support or opposition to the proposed subbasin boundary modification. We understand that letters may come in during the public comment period. RD 150 and RD 999 provided resolutions in October 2017 authorizing joining of the Yolo Subbasin, and the YSGA has supported the basin boundary modification.
There has been open communication for more than a year with RD 307 and the The Fresh Water Trust regarding the fate of RD 307's jurisdiction and coverage within a subbasin. It would have been optimal if RD 307 would have incorporated into the Yolo Subbasin for all local planning processes; however, the YSGA respects RD 307's decisions and will support future collaboration with whatever subbasin is neighboring the Yolo Subbasin

I. Hydrogeologic Conceptual Model

Requests for boundary modification, must include a document or text to a clearly defined hydrogeologic conceptual model demonstrating each of the following:
The Bulletin 118 Yolo Subbasin 2003 Update is a helpful document for partially defining the HCM for what used to be the Yolo Subbasin: https://water.ca.gov/LegacyFiles/groundwater/bulletin118/basindescriptions/5-21.67.pdf The YSGA is currently in the process of developing a new HCM for capturing and defining the entirety of the Yolo Subbasin. Additionally, this would be considered an internal boundary modification since sustainable groundwater management will be achieved with the YSGA managing the Yolo Subbasin. YSGA plans to continue relationships with neighboring subbasins and will formalize relationships and responsibilities with individual coordination agreements. YSGA also plans to share all data and resources with neighboring subbasins to best understand the underground flow patterns across boundaries. By reducing the number of GSAs within Yolo County, the YSGA is streamlining SGMA implementation and providing for centralized management between larger agencies.

L. Technical Studies for All Jurisdictional Modifications

Requests for a jurisdictional boundary must attach or provide a URL or upload a file for the following:
The YSGA has been, and is currently, coordinating with the Colusa Subbasin Groundwater Authority and the Solano Subbasin GSA. The YSGA plans to coordinate in the future with the appropriate eastern neighboring subbasin. Appropriate coordination agreements or mutual MOAs will be drafted to outline the data and information sharing and responsibilities of each agency.
Created on 08/20/2018 at 12:26PM, last modified on 12/07/2018 at 12:12PM and page generated on 09/15/2019 at 3:24AM