B. Description of Proposed Boundary Modification

1. Short Description

   Jurisdictional Internal Modification to accommodate bifurcated entities.
2. Type of basin boundary revision

   • Jurisdiction Internal
3. Provide a narrative overview of the boundary modification request and how the resulting modification would affect likelihood of sustainable management.

   Jurisdictional internal modifications are proposed to bring areas that straddle the Delta-Mendota basin and an adjacent basin to be fully within the Delta-Mendota basin. Areas being removed from the Delta-Mendota basin and into the Westside Basin are being coordinated by the Westlands Water District. Areas being removed from the Madera Basin and added to the Delta-Mendota basin are being coordinated by the Aliso Water District. Operating within one Basin will allow for simpler governance and an increased ability to sustainably manage groundwater.

   Attachment(s):
4. List the existing basin(s)/subbasin(s) to be modified by this request

   • 5-022.08 SAN JOAQUIN VALLEY - KINGS
   • 5-022.06 SAN JOAQUIN VALLEY - MADERA
   • 5-022.09 SAN JOAQUIN VALLEY - WESTSIDE
   • 5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA
   • 5-022.15 SAN JOAQUIN VALLEY - TRACY
5. Provide the proposed name for the new basin(s) or subbasin(s)

   n/a

C. Initial Notification and Combination of Requests

1. Was an initial notification submitted to the Department?

   Yes
   List of submitted initial notification for the selected basin(s)/subbasin(s).

   Local Agency	Potential Basin(s)/Subbasin(s)
   Kings River Conservation District	5-022.09 SAN JOAQUIN VALLEY - WESTSIDE , 5-022.12 SAN JOAQUIN VALLEY - TULARE LAKE , 5-022.08 SAN JOAQUIN VALLEY - KINGS , 5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA
   	5-022.08 SAN JOAQUIN VALLEY - KINGS
   San Luis & Delta-Mendota Water Authority	5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA , 5-022.06 SAN JOAQUIN VALLEY - MADERA
   Aliso Water District	5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA , 5-022.06 SAN JOAQUIN VALLEY - MADERA
   New Stone Water District	5-022.06 SAN JOAQUIN VALLEY - MADERA , 5-022.05 SAN JOAQUIN VALLEY - CHOWCHILLA
   Madera County	5-022.06 SAN JOAQUIN VALLEY - MADERA
   San Luis & Delta-Mendota Water Authority	5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA , 5-022.09 SAN JOAQUIN VALLEY - WESTSIDE
   Westlands Water District	5-022.09 SAN JOAQUIN VALLEY - WESTSIDE
   Pleasant Valley Water District	5-022.10 SAN JOAQUIN VALLEY - PLEASANT VALLEY , 5-022.09 SAN JOAQUIN VALLEY - WESTSIDE
   San Luis & Delta-Mendota Water Authority	5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA , 5-022.15 SAN JOAQUIN VALLEY - TRACY
   	5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA , 5-022.05 SAN JOAQUIN VALLEY - CHOWCHILLA
   Brentwood City Of	5-022.15 SAN JOAQUIN VALLEY - TRACY
   	5-022.15 SAN JOAQUIN VALLEY - TRACY , 5-021.66 SACRAMENTO VALLEY - SOLANO
   Brentwood City Of	5-022.15 SAN JOAQUIN VALLEY - TRACY
   Lathrop City Of	5-022.15 SAN JOAQUIN VALLEY - TRACY , 5-022.01 SAN JOAQUIN VALLEY - EASTERN SAN JOAQUIN

2. Does this application include a combination of requests?

   Yes

   If yes, describe:

   This request was directly coordinated with Aliso WD, Westlands WD, and the King River Conservation District to align with their modification requests.

D. Required Documents for All Modifications

1. A copy of the statutory or other legal authority under which the requesting agency was created with specific citations to the provisions setting forth the duties and responsibilities of the agency.

Attachment(s):

• SLDMWA JPA Current 2013-2017.pdf (1.3MB) Uploaded on 03/04/2016 at 05:34AM

2. A copy of the signed resolution adopted by the requesting agency formally initiating the boundary modification request process.

Attachment(s):

• RESO2016-398.pdf (292.5kB) Uploaded on 03/04/2016 at 05:34AM

3. A map of adequate scale (no greater than 1:24,000; e.g., 1:10,000 is not acceptable) showing the proposed modified basin boundary in relation to the existing Bulletin-118 basin boundary and the local agencies that are within or bordering the existing and proposed basin.

Attachment(s):

• DM Modification_Overall.pdf (869.8kB) Uploaded on 03/04/2016 at 05:35AM
• DM Modification_North.pdf (319kB) Uploaded on 03/04/2016 at 05:35AM
• DM Modification_South.pdf (821.1kB) Uploaded on 03/04/2016 at 05:35AM

4. A GIS shapefile of the proposed modified groundwater basin boundaries. Download Existing B118 basin shape file | DWR Spatial Data Standards

Attachment(s):

• proposed_dm_subbasin.zip (46.3kB) Uploaded on 03/10/2016 at 06:17AM

5. A GIS shapefile of the political boundaries of any affected or adjacent local agency. Download water agency shape file

Attachment(s):

• mergedistrict_dwr.zip (711.9kB) Uploaded on 03/10/2016 at 06:17AM

6. Any information, if necessary, to enable DWR to satisfy the requirements of a responsible agency pursuant to the California Environmental Quality Act.

This modification does not qualify as a project under CEQA.

E. General Information

1. Describe the lateral boundaries of the alluvial aquifer or aquifers that form the groundwater basin and the definable bottom of the basin. The description must be in terms that are clear, definite, and sufficiently detailed to allow an authoritative map of the proposed basin boundaries to be plotted using the given description.

Lateral Boundary: see attached file Bottom: http://pubs.usgs.gov/ha/489/plate-1.pdf

Attachment(s):

• Delta Mendota Subbasin Revised Boundary Description-final.docx (16.2kB) Uploaded on 03/15/2016 at 10:33AM

F. Notice and Consultation

1. List all local agencies and public water systems affected by the basin(s) modification request.

see attached

Attachment(s):

• Affected Agencies.xlsx (14.3kB) Uploaded on 03/04/2016 at 05:41AM

2. Explain the methods used to identify interested local agencies and public water systems in the affected basin(s):

Regional organization Affected Counties Established GSAs All Local Agencies and Public Water Systems within the Delta-Mendota basin All adjacent local agencies to modification area All PWS within a 5 mile offset of a modification area

3. Provide information regarding the nature of consultations with affected or interested agencies. Attach and cite any copies of correspondences with local agencies and public water systems and/or any other persons or entities consulted.

A letter has been sent to agencies affected by the boundary modification, requesting their support of this proposal. See attached. Further outreach will be done to affected agencies during notification period.

Attachment(s):

• 2016-0307 Letter of Support_Upload.pdf (1.3MB) Uploaded on 03/08/2016 at 09:39AM

4. Provide a summary of all public meetings at which the proposed boundary modification was discussed or considered by the requesting agency. Attach and cite any copies of agendas and notices published.

February 4, 2016 board meeting. Agenda Attached. Any additional meetings have been posted to the Authority's website: http://www.sldmwa.org/groundwater/

Attachment(s):

• 2016_0204_BOD_Agenda_Final.pdf (81.2kB) Uploaded on 03/04/2016 at 05:46AM
• 2016_0204_BOD_Minutes.pdf (77.5kB) Uploaded on 03/10/2016 at 06:48AM

5. Attach a copy of all comments regarding the proposed boundary modification received by the requesting agency and a summary of any responses made by the requesting agency.

See attached.

Attachment(s):

• S_SLDMWA_C416032115370.pdf (1.3MB) Uploaded on 03/21/2016 at 03:35PM

G. General Existing Groundwater Management

1. Explain how sustainable groundwater management exists or could likely be achieved in the basin:

The San Luis & Delta-Mendota Water Authority (SLDMWA) acts as an umbrella organization serving many of the Districts within the Delta-Mendota sub-basin with water and groundwater management. SLDMWA has organized agencies and prepared regional groundwater management plans for both the Northern and Southern portions of the Delta-Mendota sub-basin, and acts as the CASGEM monitoring entity. SLDMWA also serves as the IRWMG for the Westside-San Joaquin Region. The above efforts demonstrate a willingness and ability to collaborate, and a wealth of regional data collected, all of which will be required to successfully manage groundwater for sustainability.

2. Explain how the proposed boundary modification would affect the ability of adjacent groundwater basins to sustainably manage groundwater in those groundwater basins.

The intent of the SLDMWA request is to assist areas that overly multiple basins to reside in a single basin. The adjacent agencies and basins have been receptive to the proposed changes to the Delta-Mendota basin boundary. They recognize the difficulty these agencies would face managing for two different GSPs, and that this ease GSA formation and GSP implementation in their basins as well.

3. Provide a historical summary of the sustainable management of groundwater levels in the proposed basin(s) or subbasin(s).

As noted in the Northern GWMP, groundwater levels appeared to be generally hydrologically balance over the period of 1993 to 2008, with some areas of decline and some areas of surplus. The Southern GWMP indicates that this area is subject to shallow groundwater, and that groundwater levels in much of the southern area are managed by the collection and removal of shallow groundwater which is accomplished through the installation of subsurface drainage systems. The central area of the Delta-Mendota sub-basin has been discussed in the San Joaquin River Exchange Contractors Water Authority's GWMP. Groundwater in this area is used to supplement surface water supplies when necessary. This occurs during dry years, and when the surface water extraction peak rate limitations in-place in the water supply contract. The southern modifications in the area of the Traction Ranch have been previously discussed in the Lower Kings Basin GWMP. This area to be included in the Delta-Mendota Basin is represented by Area ""A"" of this GWMP. Area ""A"" is quite large in relation to the area of interest. Area ""A"" is highly reliant on groundwater and has experienced downward trends in groundwater levels. however the Traction ranch area is influenced by the San Joaquin River and Mendota Pool.

4. Discuss potential impacts to state programs resulting from the proposed boundary modification, including, but not limited to, the California Statewide Groundwater Elevation Monitoring (CASGEM), Groundwater Management Plans developed pursuant to AB 3030, Groundwater Sustainability Plans developed pursuant to the Sustainable Groundwater Management Act, any applicable state or regional board plans, and other water management and land use programs.

The only State program that could be affected is CASGEM. It would make sense that SLDMWA be the monitoring entity for the entire Delta-Mendota Sub-basin after the basin boundary modification takes effect. This boundary modification is a positive impact to the groundwater management plan in the northern basin, as it will bring the districts it represents fully within the Delta-Mendota basin.

H. Local Support

1. Provide any evidence that sufficient information was provided to affected agencies and systems regarding the proposed boundary modification.

The attached letter (with maps) was sent to affected agencies to inform and request support. Also, once the proposed basin boundary modification request is deemed complete by the DWR, then the attached letter will be sent to the affected agencies noted above.

Attachment(s):

• 2016-0303-Notification Letter.docx (20.4kB) Uploaded on 03/04/2016 at 05:51AM
• 2016-0307 Letter of Support_Upload.pdf (1.3MB) Uploaded on 03/10/2016 at 06:22AM

2. Provide a list of all affected agencies and affected systems that submitted comments and/or documents in support or opposition to the proposed boundary. The agency submitting their support or opposition for a boundary modification must provide a copy of a resolution formally adopted by the decision-making body of the affected agency or system or a letter signed by an executive officer or other official with appropriate delegated authority who represents the agency or system. Attach copies of the resolution and/or signed letter detailing the support or opposition submitted.

See attached

Attachment(s):

• S_SLDMWA_C416032115370.pdf (1.3MB) Uploaded on 03/21/2016 at 03:35PM

3. Provide any evidence that rebuts any opposition to the proposed boundary modification.

None yet. Awaiting opposition.

I. Hydrogeologic Conceptual Model

1. Principal aquifer units within requested basin.
2. Lateral boundaries of the proposed basin, including:
   1. Geologic features that significantly impede or impact groundwater flow.
   2. Aquifer characteristics that significantly impede or impact groundwater flow.
   3. Significant geologic and hydrologic features and conditions of the principle aquifer units, as appropriate, including information regarding the confined or unconfined nature of the aquifer, facies changes, truncation of units, the presence of faults or folds that impede groundwater flow, or other groundwater flow restricting features.
   4. Key surface water bodies, groundwater divides and significant recharge sources.
3. Recharge and discharge areas within the basin.
4. Definable bottom of the basin or subbasin.

The department may waive this requirement for an internal boundary modification if the requesting agency is able to demonstrate that the proposed boundary modification is unlikely to affect sustainable groundwater management.

It is requested that the Hydrogeologic Conceptual Model be waived for this internal boundary modification. This modification does not introduce any new hydrologic or geologic features that would impact sustainable groundwater management in any of the affected basins.

L. Technical Studies for All Jurisdictional Modifications

1. A water management plan that covers or is in the immediate vicinity of the proposed basin or portion of the proposed basin and satisfies the requirement of Water Code sections 10753.7(a) or 10727 by attaching one of the following:
   1. An adopted groundwater management plan, a basin wide management plan, or other integrated regional water management program or plan.
   2. Management pursuant to an adjudication action.
   3. One or more technical studies that cover the relevant portion of a basin or subbasin and adjacent areas.

URL: http://www.sldmwa.org/groundwater/

Attachment(s):

• Supporting URLs.doc (26kB) Uploaded on 03/04/2016 at 07:48AM
• Aliso Water District Groundwater Mangement AB3030 Plan.pdf (7.2MB) Uploaded on 03/04/2016 at 07:48AM
• Aliso WD Groundwater Management Plan_Update.pdf (1.2MB) Uploaded on 03/04/2016 at 07:49AM

2. A statement of the existing and planned coordination of sustainable groundwater management activities and responsibilities where required.

SLDWMA has taken the lead to organize the Delta-Mendota Sub-basin in response to SGMA. Meetings are being held in different regions to facilitate the formation of GSAs. SLDMWA is also reviewing and providing recommendations on MOUs and JPAs for the organization of the Delta-Mendota Sub-basin agencies.