Sonora Regional Wastewater Treatment Facility Improvements Project

2 Documents in Project


SCH Number
Lead Agency
Tuolumne Utilities District
Document Title
Sonora Regional Wastewater Treatment Facility Improvements Project
Document Type
MND - Mitigated Negative Declaration
Project Applicant
Erik D. Johnson
Present Land Use
City of Sonora Zoning Map Designation (2011): Limited Manufacturing (ML) City of Sonora General Plan Land Use Designation

Document Description
The proposed Project will provide replacement of existing polishing ponds with a new activated sludge treatment facility. A new administration and electrical building (Building A) will be constructed adjacent to the treatment facility. A new Building B will contain headworks and sludge dewatering systems. The existing digestion building will be a renovated Building C. Existing septage receiving station, headworks, primary clarifiers, trickling filters, and secondary clarifiers will be demolished as part of the project. The existing Emergency Storage Basin Pond A will be lined and reused in the proposed Project. The new facilities will be constructed in the location of the existing polishing ponds. The land area will be reclaimed by draining and filling the ponds with approximately 90,000 cubic yards of fill material to be generated onsite.

Contact Information
Erik D. Johnson
Tuolumne Utilities District
18885 Nugget Boulevard
Sonora, CA 95370

Phone : (209) 532-5536 ext. 520


37°57'59.1"N 120°23'16.68"W
Cross Streets
Highway 49, SR 108
Total Acres
Parcel #
State Highways
49, 108
Sonora High School
Woods Creek, Upper Tuolumne Watershed

Notice of Completion

Review Period Start
Review Period End
Development Type
Waste Treatment (Improvements)
Local Action
WWTF Improvement
Project Issues
Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Forest Land/Fire Hazard Geologic/Seismic Soil Erosion/Compaction/Grading Toxic/Hazardous Vegetation Water Quality
Reviewing Agencies
California Air Resources Board California Department of Conservation California Department of Fish and Wildlife, Central Region 4 California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of Resources Recycling and Recovery California Department of Water Resources California Governor's Office of Emergency Services California Highway Patrol California Native American Heritage Commission California Natural Resources Agency California Regional Water Quality Control Board, Central Valley Sacramento Region 5 California State Lands Commission Office of Historic Preservation State Water Resources Control Board, Division of Drinking Water State Water Resources Control Board, Division of Water Quality State Water Resources Control Board, Division of Water Rights California Department of Transportation, District 10 Central Valley Flood Protection Board State Water Resources Control Board, Divison of Financial Assistance


Environmental Document
rpt_tud_srwwtf_improvements_public_ceqa_ismnd_11_2019   PDF 18457 K Summary Form   PDF 90 K
NOC   PDF 892 K
State Comments
2019129009_CVRegWQCB   PDF 2066 K 2019129009_DOT10_TUO-108-PM 0   PDF 219 K 2019129009_TUD Comment Letter   ZIP 3015 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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