B. Description of Proposed Boundary Modification

1. Short Description

   Modify the boundary between the Delta-Mendota and the Chowchilla Sub-basins to follow the western boundary of Triangle T WD and the southern boundary of Clayton WD. It would move approx. 700 acres of land from the Chowchilla Sub-basin to the DM Sub-basin.
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.

   Alteration of the current Delta-Mendota/Chowchilla basin boundary would not hinder the collaborative efforts to sustainably manage groundwater. This basin boundary modification request is an effort to simplify management, monitoring and reporting by keeping the approximately 2,400 acres of BB Limited property in same groundwater basin. The BB limited property is in the north portion of Columbia Canal Company. Most the BB Limited land acts as the northern and northeastern border between the Delta-Mendota and Chowchilla Sub-basins. However, the two parcels that serve as the northern boundary of Columbia Canal Company are partially in Columbia Canal Company and partially in the Madera County white area; therefore, split between the Delta-Mendota and Chowchilla Sub-basins and the SJRECGSA and the Madera County GSA. Two additional parcels are completely in the Chowchilla Sub-basin and Madera County GSA. All parcels have been managed as a single block since the 1930s. All water applied to these lands come from the Delta-Mendota Sub-basin. By modifying the boundary between the two basins to include all BB Limited properties in the Delta-Mendota Sub-basin, management, coordination, monitoring and reporting will be simplified. Additionally, the SJRECWA and Madera County are discussing inclusion of other Madera County white areas within the Delta-Mendota Sub-basin into the SJRECGSA's GSP. Inclusion of these white areas would further simplify the management process by maintaining historic management practices and ensuring all BB Limited properties are managed in the same GSP. The members of adjacent districts within each basin recognize the difficulties the white areas face and the limitations of having agricultural operations split between basins, as evident by their letters of support. However, the proposed basin modification will not affect either the Delta-Mendota or Chowchilla basins ability to manage groundwater. Agencies in the Delta-Mendota Sub-basin are working collaboratively with landowners and agencies in the Chowchilla Sub-basin to stabilize groundwater overdraft and subsidence. The purpose of this boundary modification is for consistency in monitoring, reporting and implementation of sustainability strategies. SJRECWA and SLDMWA have included the BB Limited properties in their comprehensive groundwater management plans and considered projects on BB Limited properties to stabilize groundwater in the area. The GWMPs of the SLDMWA and the SJRECWA recognize that overdraft does exist and that it is localized. Both the Delta-Mendota and Chowchilla Sub-basins have experienced groundwater overdraft and subsidence in the vicinity of the proposed modification. Agencies in both basins are working together on solutions to stabilize groundwater. The SJRECWA in the Delta-Mendota Sub-basin has developed relationships with newly formed Water Districts and Groundwater Sustainability Agencies, in the former white areas of the Chowchilla Sub-basin, in efforts to obtain grant funding for projects that would deliver surface water to groundwater dependent regions. One such project was built in 2017 which allows water to move under the San Joaquin River to facilitate bringing new surface water supplies to the region. Deliveries began in 2017 and continued into 2018. Groundwater use has declined, and planned infrastructure programs have been implemented by the agencies in both basins with the help of the SJRECWA and the goal of proactively preventing undesirable results from crossing thresholds that will affect both basins.

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

   • 5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA
   • 5-022.05 SAN JOAQUIN VALLEY - CHOWCHILLA
5. Provide the proposed name for the new basin(s) or subbasin(s)

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
   San Luis & Delta-Mendota Water Authority	5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA , 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
   Aliso Water District	5-022.07 SAN JOAQUIN VALLEY - DELTA-MENDOTA , 5-022.06 SAN JOAQUIN VALLEY - MADERA
   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
   Chowchilla Water District	5-022.05 SAN JOAQUIN VALLEY - CHOWCHILLA
   New Stone Water District	5-022.06 SAN JOAQUIN VALLEY - MADERA , 5-022.05 SAN JOAQUIN VALLEY - CHOWCHILLA
   Madera County	5-022.05 SAN JOAQUIN VALLEY - CHOWCHILLA

2. Does this application include a combination of requests?

   No

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):

• 1_SJRECWA JPA - REVISED 7-13-01.pdf (1.1MB) Uploaded on 07/11/2018 at 10:31AM

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

Attachment(s):

• 2_Resolution No. 18-03 - Basin Boundary Modification Request - Executed 6-22-18.pdf (946.7kB) Uploaded on 07/06/2018 at 11:10AM

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):

• boundary_mod_landscape v2.pdf (256.2kB) Uploaded on 07/11/2018 at 10:37AM
• boundary_mod_zoomed_out.pdf (472.9kB) Uploaded on 07/11/2018 at 10:37AM

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

Attachment(s):

• Exchange_Contractors_DeltaMendota_Chowchilla.shp.zip (165kB) Uploaded on 04/08/2019 at 04:01PM

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

Attachment(s):

• affected_agencies.zip (148.3kB) Uploaded on 07/11/2018 at 10:52AM

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

There are no impacts to state programs from this proposed change.

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.

The proposed basin modification will follow the Clayton Water District and Triangle T Water District boundaries as described in the Written Lateral Basin Mod Description below. Due to the rapidly changing boundaries in the area, clarifications need to be made with regard to the proposed boundaries. Attached are additional documents from the Madera LAFCO that identify the surveyed boundaries for both Clayton and Triangle-T Water Districts. Also attached is the most recent map of the Clayton Water District future annexations. Please refer to these to determine political boundaries as other existing maps and drawings may vary.

Attachment(s):

• LAFCO_ClaytonWaterDistrictMunici.pdf (3.1MB) Uploaded on 08/13/2018 at 03:12PM
• 4_Written Lateral Basin Mod DescriptionNew.pdf (9.7kB) Uploaded on 07/06/2018 at 11:11AM
• 5_Bottom of Basin plate-1.pdf (6.1MB) Uploaded on 07/06/2018 at 11:11AM
• 4.1_5-22.05 (1).pdf (32kB) Uploaded on 07/13/2018 at 11:16AM
• 4.2_5-22.07 (1).pdf (27.2kB) Uploaded on 07/13/2018 at 11:16AM
• Revised Legal Description.pdf (498.1kB) Uploaded on 08/13/2018 at 03:12PM
• Revised Map.pdf (552.4kB) Uploaded on 08/13/2018 at 03:12PM
• CLAYTON WD MSR EXHIBIT.pdf (2MB) Uploaded on 08/13/2018 at 03:18PM
• boundary_mod_parcels.pdf (289.3kB) Uploaded on 07/13/2018 at 11:15AM

F. Notice and Consultation

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

Attachment(s):

• agencies_5mile_buffer_of_basinmodificationarea.xlsx (9.4kB) Uploaded on 07/06/2018 at 11:12AM

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

Affected Counties (Madera) - Review of existing maps of governmental agency boundaries Established GSAs - Review of DWR web portal Adjacent local agencies and cities - Review of existing maps of governmental agency boundaries PWS within a 5 mile radius - Review of maps and discussions with community residences

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.

Consultations were held with Dane Mathis and representatives from DWR as well as Stephanie Anagnoson, Madera County Director of Water and Natural Resources, regarding specifics on lead agencies that can request boundary modifications. DWR was also consulted to clarify suitable rational for requesting modifications, such as altering the boundary to following political or hydrogeological borders. All nearby water districts and GSAs in both the Chowchilla and Delta-Mendota Basins were informed and given the opportunity to comment on the proposed request. Most of the potentially affected districts offered support for the modification with only Chowchilla GSA requesting clarification and the County of Madera abstaining. Conversations with the County of Madera confirmed that they would not take the lead on a boundary modification that was not county specific, changing boundaries to follow county lines, or hydrogeological in nature.

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.

Exchange Contractors Board Meeting 6-1-2018 Columbia Canal Meeting 6-5-2018 Triangle T Meeting 6-7-2018 Clayton Board Meeting 6-12-2018 Chowchilla WD Board Meeting 6-13-2018 Exchange Contractors Special Board Meeting on 6-22-2018

Attachment(s):

• 180604-SJREC Support Request Letter public.pdf (1.4MB) Uploaded on 07/06/2018 at 11:15AM
• 180601-EC Agenda.pdf (487.6kB) Uploaded on 07/06/2018 at 11:15AM
• 180612-ClaytonWDBoardPacket.pdf (19.1MB) Uploaded on 07/06/2018 at 11:17AM
• 180613 Chowchilla WD Agenda.pdf (119kB) Uploaded on 07/06/2018 at 11:17AM
• 180622-SJREC Special Board Meeting.pdf (517kB) Uploaded on 07/06/2018 at 11:18AM

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.

Attachment(s):

• CCC Letter of Support.2018-0605.pdf (279.2kB) Uploaded on 07/06/2018 at 11:17AM
• Clayton WD.pdf (35.7kB) Uploaded on 07/06/2018 at 11:17AM
• CWD-no support.2018-0618.pdf (617.5kB) Uploaded on 07/06/2018 at 11:18AM
• TT Letter on BB farms.pdf (205.7kB) Uploaded on 07/06/2018 at 11:18AM

G. General Existing Groundwater Management

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

Agencies in the Delta-Mendota Sub-basin have been proactively working with white area growers and Agencies in the Chowchilla Sub-basin for several years, in what is known as the Red Top Area, to develop solutions to SGMA related issues such as overdraft and subsidence. Alteration of the current Delta-Mendota/Chowchilla basin boundary would not hinder the collaborative efforts to sustainably manage groundwater. This basin boundary modification request is an effort to simplify management, monitoring and reporting by keeping the approximately 2,400 acres of BB Limited property in same groundwater basin. The BB limited property is in the north portion of Columbia Canal Company. Most the BB Limited land acts as the northern and northeastern border between the Delta-Mendota and Chowchilla Sub-basins. However, the two parcels that serve as the northern boundary of Columbia Canal Company are partially in Columbia Canal Company and partially in the Madera County white area; therefore, split between the Delta-Mendota and Chowchilla Sub-basins and the SJRECGSA and the Madera County GSA. Two additional parcels are completely in the Chowchilla Sub-basin and Madera County GSA. All parcels have been managed as a single block since the 1930s. All water applied to these lands come from the Delta-Mendota Sub-basin. By modifying the boundary between the two basins to include all BB Limited properties in the Delta-Mendota Sub-basin, management, coordination, monitoring and reporting will be simplified. Additionally, the SJRECWA and Madera County are discussing inclusion of other Madera County white areas within the Delta-Mendota Sub-basin into the SJRECGSA's GSP. Inclusion of these white areas would further simplify the management process by maintaining historic management practices and ensuring all BB Limited properties are managed in the same GSP.

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

The members of adjacent districts within each basin recognize the difficulties the white areas face and the limitations of having agricultural operations split between basins, as evident by their letters of support. However, the proposed basin modification will not affect either the Delta-Mendota or Chowchilla basins ability to manage groundwater. The BB Limited white area properties, north of the boundary to be modified, are operated as one with BB Limited lands in the Columbia Canal Company (CCC). Because the white area is on the boundary of two basins, their actions will impact both the Delta-Mendota and Chowchilla Basins. However, past water management supports the modification. Pre-1980 there were two deep wells in the white area, along the east levee, but they have long since been capped off. Now all water that is applied to the white area comes from wells closer to the south end of the BB Limited ranch within the CCC boundary. In addition, there are no plans to install any deep wells in the white area in the future. Inclusion of the white areas owned and operated by BB Limited into the Delta-Mendota Sub-basin would allow for easier coordination of data and channel conveyance availability to convey water for use on the BB Limited land. Removal of the BB Limited white areas from the Chowchilla Sub-basin will not affect the Chowchilla Sub-basins ability to sustainably manage groundwater. Agencies in the Delta-Mendota Sub-basin are working collaboratively with landowners and agencies in the Chowchilla Sub-basin to stabilize groundwater overdraft and subsidence. The purpose of this boundary modification is for consistency in monitoring, reporting and implementation of sustainability strategies.

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

There are multiple AB3030 groundwater management plans that overlay or are adjacent to the boundary modification location. SJRECWA and SLDMWA have included the BB Limited properties in their comprehensive groundwater management plans and considered projects on BB Limited properties to stabilize groundwater in the area. The GWMPs of the SLDMWA and the SJRECWA recognize that overdraft does exist and that it is localized. Both the Delta-Mendota and Chowchilla Sub-basins have experienced groundwater overdraft and subsidence in the vicinity of the proposed modification. Agencies in both basins are working together on solutions to stabilize groundwater. The SJRECWA in the Delta-Mendota Sub-basin has developed relationships with newly formed Water Districts and Groundwater Sustainability Agencies, in the former white areas of the Chowchilla Sub-basin, in efforts to obtain grant funding for projects that would deliver surface water to groundwater dependent regions. One such project was built in 2017 which allows water to move under the San Joaquin River to facilitate bringing new surface water supplies to the region. Deliveries began in 2017 and continued into 2018. Groundwater use has declined, and planned infrastructure programs have been implemented by the agencies in both basins with the help of the SJRECWA and the goal of proactively preventing undesirable results from crossing thresholds that will affect both basins.

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.

There are no impacts to state programs from this proposed change.

H. Local Support

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

Attachment(s):

• Support Request Letter - CCC.pdf (6.3MB) Uploaded on 07/06/2018 at 11:21AM
• Support Request Letter - CCID.pdf (6.3MB) Uploaded on 07/06/2018 at 11:21AM
• Support Request Letter - Chowchilla WD.pdf (6.3MB) Uploaded on 07/06/2018 at 11:21AM
• Support Request Letter - Clayton WD.pdf (6.3MB) Uploaded on 07/06/2018 at 11:22AM
• Support Request Letter - Madera County.pdf (6.3MB) Uploaded on 07/06/2018 at 11:22AM
• Support Request Letter - TTWD.pdf (1.5MB) Uploaded on 07/06/2018 at 11:22AM
• Website Posting KB edits-db.pdf (1.4MB) Uploaded on 07/06/2018 at 11:23AM

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.

Attachment(s):

• CWD-no support.2018-0618.pdf (617.5kB) Uploaded on 07/06/2018 at 11:24AM
• CCC Letter of Support.2018-0605.pdf (279.2kB) Uploaded on 07/06/2018 at 11:28AM
• Clayton WD.pdf (35.7kB) Uploaded on 07/06/2018 at 11:28AM
• TT Letter on BB farms.pdf (205.7kB) Uploaded on 07/06/2018 at 11:28AM

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

Attachment(s):

• ChowchillaWD.BBresp.ltr.pdf (125.3kB) Uploaded on 07/06/2018 at 11:29AM

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 requirement be waived for this internal boundary modification. This modification does not include new hydrogeologic features that would impact sustainable groundwater management in either the Delta-Mendota or the Chowchilla Sub-basins.

Attachment(s):

• SJ-12_SanJoaquinRiverExchangeContractorsWAs_GWMP_2008.pdf (3.7MB) Uploaded on 07/06/2018 at 12:13PM
• SJ-5_MaderaCounty_GWMP_FinalDraft_2002.pdf (4.5MB) Uploaded on 07/06/2018 at 12:13PM
• FINAL_AdoptedSLWDGroundWaterManagementPlanSouthernAgencies12-19-14tjc.pdf (5.2MB) Uploaded on 07/06/2018 at 12:14PM
• 4_Written Lateral Basin Mod DescriptionNew.pdf (9.7kB) Uploaded on 07/06/2018 at 12:16PM
• 5_Bottom of Basin plate-1.pdf (6.1MB) Uploaded on 07/06/2018 at 12:16PM
• 4.1_5-22.05 (1).pdf (32kB) Uploaded on 07/30/2018 at 11:19AM
• 4.2_5-22.07 (1).pdf (27.2kB) Uploaded on 07/30/2018 at 11:20AM

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.

Attachment(s):

• SJ-12_SanJoaquinRiverExchangeContractorsWAs_GWMP_2008.pdf (3.7MB) Uploaded on 07/06/2018 at 02:49PM
• SJ-5_MaderaCounty_GWMP_FinalDraft_2002.pdf (4.5MB) Uploaded on 07/06/2018 at 02:49PM
• FINAL_AdoptedSLWDGroundWaterManagementPlanSouthernAgencies12-19-14tjc.pdf (5.2MB) Uploaded on 07/06/2018 at 02:50PM

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

The Exchange Contractors are currently discussing coordination with Madera County to include Madera County white areas of the Delta-Mendota basin in the San Joaquin River Exchange Contractors GSP. Additionally, the Exchange Contractors are working with other white area growers in the Delta-Mendota Basin and the Chowchilla Basin to help stabilize groundwater in the area. Triangle T Water District GSA, Clayton Water District, and Madera white areas are working with the SJRECWA to plan and implement programs and projects that will stabilize groundwater in western Madera. SJRECWA and the neighboring member districts have a vested interest in assisting western Madera County in stabilizing groundwater levels and reducing groundwater pumping as the effects of overdraft and subsidence in Madera encroach on SJRECWA properties and infrastructure. The adjacent properties on either side of the Delta-Mendota/Chowchilla boundary are in agreement that altering the boundary as described will not create adverse effects nor will it impact the existing collaborative efforts of neighboring properties in separate basins.