B. Description of Proposed Boundary Modification

1. Short Description

   Modify western boundary of the Paso Robles Groundwater Basin 3-04.06 on the Nacimiento River
2. Type of basin boundary revision

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

   Modification of the boundary should be considered based on the history of Bulletin 118, geology, and surface water contracts within the modified area.

   Attachment(s):

   Memo adopt Res 16-01 boundary modification.pdf (120.1kB) Uploaded on 03/21/2016 at 02:01PM
4. List the existing basin(s)/subbasin(s) to be modified by this request

   • 3-004.06 SALINAS VALLEY - PASO ROBLES AREA
5. Provide the proposed name for the new basin(s) or subbasin(s)

   Not applicable

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)
   Templeton Community Services District	3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   Heritage Ranch Community Service District	3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   Monterey County Water Resources Agency	3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   	3-004.05 SALINAS VALLEY - UPPER VALLEY AQUIFER , 3-004.06 SALINAS VALLEY - PASO ROBLES AREA
   	3-004.06 SALINAS VALLEY - PASO ROBLES AREA

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):

• Ownership Documentation.pdf (3.7MB) Uploaded on 03/21/2016 at 02:49PM

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

Attachment(s):

• BASIN BOUNDARY MOD RES 16-1 Signed.pdf (1.5MB) Uploaded on 03/21/2016 at 02:03PM

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):

• Heritage Ranch proposed modificaiton and adjacent agencies.pdf (183.6kB) Uploaded on 03/28/2016 at 09:08AM

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

Attachment(s):

• Proposed Boundary.zip (60.5kB) Uploaded on 03/28/2016 at 09:09AM

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

Attachment(s):

• Heritage Ranch Boundary.zip (15.3kB) Uploaded on 03/28/2016 at 09:11AM

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

Project is exempt from Section 21000 of 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.

Boundary modification request is to exclude a portion of the Nacimiento River from Bulletin 1183-04.06 where the alluvium is 24 feet or less deep below the river flood plain (17 feet of saturated thickness), as observed in several borings, and 600 feet wide. This is less than the 25-foot depth required for aquifers within a basin per DWR boundary guidelines. The alluvial deposits narrow where the USGS stream gage 1114940 is located on Camp Roberts’ property (35° 45’ 41” latitude, 120° 51’ 16” longitude).

F. Notice and Consultation

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

See attached list.

Attachment(s):

• Heritage Ranch CSD Boundary Modification Distribution List.pdf (213.8kB) Uploaded on 03/21/2016 at 02:13PM

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

Attended and explained our request for basin modifications at a San Luis Obispo County Water Resources Advisory Committee meeting on 3/2/16. Held Public Hearing on 3/17/16 of our request.

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.

No agencies are affected by this request. Notice send to all water agencies.

Attachment(s):

• Public Hearing Paso Groundwater Basin.pdf (62.2kB) Uploaded on 03/21/2016 at 02:18PM

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.

Attended SLO County WRAC meeting on March 2 Held Public Hearing on March 17

Attachment(s):

• 031716.pdf (136.3kB) Uploaded on 03/21/2016 at 02:17PM

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 received.

H. Local Support

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

No support or opposition to proposed boundary modification.

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.

No comments were received because all basin agencies/systems know that 1/2 mile from the Nacimiento Dam is surface water and not within the water bearing Paso Robles Formation..

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

Not applicable

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.

See attached.

Attachment(s):

• HRCSD basin boundary Cleath memo 030116.pdf (237kB) Uploaded on 03/21/2016 at 02:30PM

J. Technical Studies for External Scientific Modifications

1. A qualified map that depicts the lateral boundaries of the aquifers that define the basin or subbasin.

Revised technical memorandum with maps attached. This report supersedes the March 1 report. Text did not change only revised maps.

Attachment(s):

• HRCSD basin boundary Cleath memo 030116.pdf (237kB) Uploaded on 03/21/2016 at 02:30PM
• Geologic map HRCSD.pdf (1.7MB) Uploaded on 03/21/2016 at 02:32PM
• basin modification map.pdf (1,004kB) Uploaded on 04/14/2016 at 02:04PM
• Basin Boundary Letter Final.pdf (4.3MB) Uploaded on 04/20/2016 at 02:19PM

2. A technical study that provides subsurface data that demonstrates the vertical thickness and relevant physical properties of the alluvial aquifer or stacked series of alluvial aquifers.

See attached.

Attachment(s):

• Heritage Ranch Naci River Site Borings.pdf (1.4MB) Uploaded on 04/07/2016 at 08:20AM