Sierra Foothill Charter School Water Well Replacement Project

2 Documents in Project

Summary

SCH Number
2021120556
Lead Agency
Mariposa County Unified School District
Document Title
Sierra Foothill Charter School Water Well Replacement Project
Document Type
MND - Mitigated Negative Declaration
Received
Present Land Use
NORTH Rural Residential Community Residential TPAZ (Interim Community Center) EAST Rural Residential Community Residential TPAZ (Interim Community Center) SOUTH Rural Residential Residential TPAZ (Interim Community Center) WEST Rural Residential Community Residential Public Facilities and Services TPAZ (Interim Community Center)
Document Description
The proposed new well will be located on the SFCS school site (APN: 016-280-005-000), but at a different location from the existing well (400 feet apart). The proposed well will be drilled to an estimated 700 feet below ground surface (bgs) or less depending on the geology. Associated chlorination treatment and hydropneumatics pressure systems and other appurtenances necessary for the production and treatment of domestic water will be installed. The Project will also add two new 2,500-gallon water storage tanks, a pump house to house the booster pumps, and six (6) inch diameter pipeline connection of approximately 100 feet to the existing distribution system. Pipeline excavation will be limited to 3.5 feet deep or less.

Contact Information

Name
Linda Mayfield
Agency Name
Mariposa County Unified School District
Job Title
Director of Maintenance and Operations
Contact Types
Lead/Public Agency / Project Applicant

Name
Briza Sholars
Agency Name
Provost & Pritchard
Job Title
Senior Planner
Contact Types
Consulting Firm

Location

Cities
Catheys Valley
Counties
Mariposa
Regions
Unincorporated
Cross Streets
School House Road and SR140
Zip
95338
Total Acres
0.33
Parcel #
016-280-005-000
State Highways
SR140
Railways
NA
Airports
NA
Schools
Sierra Foothill Charter School
Waterways
NA
Township
06S
Range
17E
Section
09/10
Base
MDB&M
Other Location Info
The Sierra Foothill Charter School (SFCS), previously known as the Cathey’s Valley Elementary School, operates a water system with one active well. The single well solely serves the school property and is located at the southeast portion of the school site. The existing well contains a concrete slab and supporting infrastructure of three water tanks and a pumphouse. In June 2016, the single active well for the SFCS was taken offline after a sample for nitrate-N levels taken exceeded the Maximum Contaminant Level (MCL) of 7-10 mg/L nitrate-N regulated by the State Water Resources Control Board, Division of Drinking Water (DDW). The data for the nitrate-N levels were plotted with precipitation and results showed that nitrate spikes follow seasonal precipitation, which indicates nitrate is transported to the well following seasonal recharge. Based on this pattern, it is likely nitrate-N levels sampled in the well may have reduced to an acceptable quality, but the Mariposa County Unified School District would like a second well installed and constructed to avoid any future issues. The original well will remain in use for irrigation purposes. The proposed new well will be located on the SFCS school site (APN: 016-280-005-000), but at a different location from the existing well (400 feet apart). The proposed well will be drilled to an estimated 700 feet below ground surface (bgs) or less depending on the geology. Associated chlorination treatment and hydropneumatics pressure systems and other appurtenances necessary for the production and treatment of domestic water will be installed. The Project will also add two new 2,500-gallon water storage tanks, a pump house to house the booster pumps, and six (6) inch diameter pipeline connection of approximately 100 feet to the existing distribution system. Pipeline excavation will be limited to 3.5 feet deep or less. Operations and maintenance of the proposed Project would be consistent with that of the existing well. Due to the exceedances of water quality standards, water is currently delivered in 3,000 gallon increments every two (2) weeks by truck and then utilized from an on-site storage tank.
Other Information
The Project is located in Mariposa County, California, approximately 138 miles southwest of Sacramento and 171 miles north of Bakersfield. The Project site is located on Assessor’s Parcel Number 016-280-005-000 which is approximately three (3) acres. The Area of Potential Effect (APE) for the project is .33 acres. The centroid of the Project site is 37° 25’ 24.6” North, 120° 6’ 6.01” West.

Notice of Completion

State Review Period Start
State Review Period End
State Reviewing Agencies
California Air Resources Board (ARB), California Department of Conservation (DOC), California Department of Education, California Department of Fish and Wildlife, Central Region 4 (CDFW), California Department of Forestry and Fire Protection (CAL FIRE), California Department of Parks and Recreation, California Department of Water Resources (DWR), California Highway Patrol (CHP), California Native American Heritage Commission (NAHC), California Natural Resources Agency, California Regional Water Quality Control Board, Central Valley Fresno Region 5 (RWQCB), Central Valley Flood Protection Board, Department of General Services (DGS), Department of Toxic Substances Control, Office of Historic Preservation, State Water Resources Control Board, Division of Drinking Water, State Water Resources Control Board, Division of Water Rights, State Water Resources Control Board, Divison of Financial Assistance, California Department of Transportation, District 10 (DOT)
State Reviewing Agency Comments
California Department of Transportation, District 10 (DOT)
Development Types
Other (Water Well)
Local Actions
Water Well
Project Issues
Biological Resources, Cultural Resources, Geology/Soils, Tribal Cultural Resources

Attachments

State Comment Letters [Comments from state reviewing agencies]

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