B. Description of Proposed Boundary Modification

1. Short Description

   Jurisdictional Consolidation of the Tehama County portion of the Colusa Subbasin (5-21.52).
2. Type of basin boundary revision

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

   The Tehama County Flood Control and Water Conservation District (FC&WCD) was recognized as the Exclusive Groundwater Sustainability Agency (GSA) on February 11, 2016 for all portions of the 11 groundwater subbasins located within Tehama County, including the Corning (5-21.51) and Colusa (5-21.52) subbasins. This proposed Jurisdictional Consolidation will incorporate the small portion of the Colusa subbasin located within Tehama County, into the portion of the Corning subbasin located within Tehama County. This portion of the Colusa subbasin is approximately 1,300 acres with 10 individual landowners. The entire Colusa subbasin is 918,380 acres and spans 4 County's, additionally there are currently 13 agencies that have submitted GSA notices with the Department of Water Resources for this subbasin. The consolidation of this area will simplify the management of groundwater resources by reducing the total number of managing agencies, thereby limiting management to the local GSA's within Tehama and Glenn Counties. The FC&WCD will continue coordinating groundwater management activities with whichever GSA's are responsible for managing the Colusa subbasin since it will continue to border Tehama County.

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

   • 5-021.52 SACRAMENTO VALLEY - COLUSA
   • 5-021.51 SACRAMENTO VALLEY - CORNING
5. Provide the proposed name for the new basin(s) or subbasin(s)

   Not applicable, the proposed modification will incorporate the portion of the Colusa Subbasin (5-21.52) located within Tehama County into the portion of the Corning Subbasin (5-21.51) located within Tehama County.

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)
   Tehama County Flood Control & Water Conservation District	5-021.52 SACRAMENTO VALLEY - COLUSA , 5-021.51 SACRAMENTO VALLEY - CORNING
   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
   Tehama County Flood Control & Water Conservation District	5-006.01 REDDING AREA - BOWMAN , 5-006.06 REDDING AREA - SOUTH BATTLE CREEK , 5-021.53 SACRAMENTO VALLEY - BEND , 5-021.54 SACRAMENTO VALLEY - ANTELOPE , 5-021.56 SACRAMENTO VALLEY - LOS MOLINOS , 5-021.57 SACRAMENTO VALLEY - VINA , 5-021.51 SACRAMENTO VALLEY - CORNING , 5-021.52 SACRAMENTO VALLEY - COLUSA , 5-021.50 SACRAMENTO VALLEY - RED BLUFF
   	5-021.52 SACRAMENTO VALLEY - COLUSA

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):

• SGMA_NOI_Resolution_05_2015_Signed.pdf (214.4kB) Uploaded on 03/28/2016 at 10:37AM

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

Attachment(s):

• Signed_Resolution.pdf (209kB) Uploaded on 03/29/2016 at 09:00AM

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):

• Basin_Boundary_Adjustment_Maps.pdf (569.4kB) Uploaded on 03/28/2016 at 05:18PM

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

Attachment(s):

• Basin_Boundary_shapefile.zip (27.2kB) Uploaded on 03/28/2016 at 05:20PM

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

Attachment(s):

• D_5_ Political_Boundary_Shapefile.zip (25.5kB) Uploaded on 03/29/2016 at 08:17AM

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

The basin boundary modification is exempt from the California Environmental Quality Act (CEQA) because it is not a project under CEQA. Even if the basin boundary modification constitutes a project, it would be exempt because there it is no possibility that it will have a significant effect on the environment. District staff filed a Notice of Exemption on March 29, 2016. The Notice of Exemption is provided in the attached sheets.

Attachment(s):

• Filed_NOE.pdf (71.6kB) Uploaded on 03/29/2016 at 05:24PM

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 portion of the Colusa subbasin proposed to be modified is currently defined by Black Butte Lake on its western boundary, and Stony Creek on its northern and eastern boundaries. The FC&WCD is proposing to move these boundaries approximately 1 mile to the south to the Tehama/Glenn County border. By consolidating this small area into the Corning subbasin, it will separate it from the larger Colusa subbasin conglomerate, thereby allowing for more localized groundwater management.

Attachment(s):

• Colusa_Bulletin118_info.pdf (99.6kB) Uploaded on 03/28/2016 at 05:35PM
• Corning_Bulletin118_info.pdf (46.3kB) Uploaded on 03/28/2016 at 05:35PM
• water inventory and analysis.pdf (29.3MB) Uploaded on 03/28/2016 at 05:37PM

F. Notice and Consultation

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

This rural area consist of 10 property owners and no public water systems. The U.S. Army Corps of Engineers (USACE) operates Black Butte Reservoir which is along the western boundary of the Colusa subbasin that's located within Tehama County. The USACE also owns the property surrounding the reservoir, some of which is within the proposed adjustment. The FC&WCD will coordinate appropriately with USACE in future management decisions concerning the Corning subbasin.

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

Local knowledge and data collected during the Tehama County Groundwater Management Plan update in 2012.

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.

The proposed basin modification will not change any of the management responsibilities of the FC&WCD which has been recognized as the Exclusive GSA for the area proposed for consolidation. Both the GSA development and Basin Boundary Modification processes were noticed publically and discussed during meetings that permitted public comment.

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.

The Basin Boundary Jurisdictional Consolidation was proposed and discussed at the FC&WCD Board meeting on March 23, 2016. This meeting is noticed publically and open to the public. No public comment was received during the meeting.

Attachment(s):

• 03_23_16_Agenda.pdf (112.8kB) Uploaded on 03/28/2016 at 12:42PM

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.

No comments were received.

G. General Existing Groundwater Management

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

The FC&WCD will develop a Groundwater Sustainability Plan (GSP) to facilitate sustainable groundwater management for the portions of the Colusa and Corning subbasins located within Tehama County. The FC&WCD will also coordinate with whichever GSAs form within the Glenn County portion of the Corning subbasin. The FC&WCD also plans to coordinate with any GSA's that have subbasins that border Tehama County, including the Colusa subbasin.

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

The proposed Jurisdictional Consolidation would not negatively affect the ability of any surrounding groundwater subbasins to sustainably manage groundwater. The FC&WCD plans to coordinate groundwater management activities with surrounding GSA?s.

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

The portions of the Corning and Colusa subbasins that are located within Tehama County have been managed and monitored under the FC&WCD's Coordinated AB3030 Groundwater Management Plan which was originally adopted in 1996, and updated in 2012. Currently areas within the Colusa and Corning subbasins are experiencing continued decreases in groundwater levels, this is something that the FC&WCD will continue to monitor, and address if necessary, during the GSP development process and in future coordination agreements with surrounding GSA's.

Attachment(s):

• AB3030_Groundwater_Management_Plan.pdf (39.2MB) Uploaded on 03/28/2016 at 01:01PM

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 will be no impacts to state programs as a result of this minor Jurisdictional Consolidation.

H. Local Support

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

This minor Jurisdictional Consolidation will have no impacts on the landowners within the proposed boundary modification. Currently the FC&WCD is the Exclusive GSA for both portions of the subbasins that are included in this consolidation. A publicly noticed meeting was held to discuss the potential modification and no comments were received.

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.

The FC&WCD has received no comments and/or documents on the proposed boundary modification.

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

There has been no opposition to the proposed boundary modification.

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.

The FC&WCD has been recognized as the Exclusive GSA for both portions of the Corning and Colusa subbasins within Tehama County. The proposed Jurisdictional Consolidation will simply incorporate the small portion of the Colusa subbasin within Tehama County into the Corning subbasin allowing for easier management of groundwater by consolidating the amount of potential GSA's. The Colusa subbasin as a whole spans 4 counties covering 918,380 acres. The proposed modification will consolidate approximately 1,300 acres at the northern most tip of the Colusa subbasin into Corning subbasin thereby separating it from the very sizeable Colusa subbasin, allowing for an improved level of localized groundwater management.

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.tehamacountypublicworks.ca.gov/Flood/

Attachment(s):

• AB3030_Groundwater_Management_Plan.pdf (39.2MB) Uploaded on 03/28/2016 at 01:52PM

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

The FC&WCD submitted a Notice of Intent (NOI) to become the GSA for all portions of the eleven groundwater subbasins located within Tehama County on November 4, 2016. This NOI discusses the FC&WCD's plan for the coordination of sustainable groundwater management activities and responsibilities. These management activities and responsibilities will be further refined during the development of the GSP.

Attachment(s):

• Tehama_County_GSA_NOI_11_04_2015.pdf (1.1MB) Uploaded on 03/28/2016 at 01:52PM