Unimin Pond J Dam Reconstruction/Relocation Project

2 Documents in Project


SCH Number
Lead Agency
Amador County
Document Title
Unimin Pond J Dam Reconstruction/Relocation Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
"X" - Special Use Permit / MRZ - Mineral Resource Zone

Document Description
Pond "J" project at the Unimin site in Ione. Pond J is located approximately one mile southwest of the mine's main processing plant. An existing dam, about 80 feet high and 1,000 feet in crest length is located at the site. The proposed dam would be located approximately 1,000 feet to the existing dam's southwest. Most of the area between the existing and proposed dam has been stripped and graded as part of the past mining and dam construction activities. Proposed are two segments to the new dam: Section 1 would be located at Pond J's southwest side and will be approximately 800 feet long and 35 feet high; Section 2 would be located along Pond J's south and southeast sides and will be approximately 1,450 feet long and up to 30 feet high. Once the dam is completed, Pond J would be able to hold approximately 1,544 acre feet of water and cover a surface area of approximately 68.4 acres. This area would eventually be filled with mine tailings (e.g. sand). Approximately 110,000 cubic yards of fill material would be used for the dam and approximately 10,000 cubic yards would be associated with the excavation and backfill for the dam.

Contact Information
Nathan Lishman
Amador County Planning Department
810 Court Street
Jackson, CA 95642

Phone : (209) 223-6380


Cross Streets
Highway 124 and Buena Vista Road
Total Acres
202 +/-
Parcel #
State Highways
124, 104, 88
Southern Pacific
Private Airstrip

Notice of Completion

Review Period Start
Review Period End
Development Type
Mining (Sand for glass Mineral) Other (Reconstruction of dam to further mineral extraction)
Local Action
Grading Permit
Project Issues
Air Quality Geologic/Seismic Water Quality
Reviewing Agencies
Air Resources Board, Major Industrial Projects California Department of Conservation California Department of Fish and Wildlife, North Central Region 2 California Department of Parks and Recreation California Highway Patrol California Native American Heritage Commission California Public Utilities Commission California Regional Water Quality Control Board, Central Valley Sacramento Region 5 California State Lands Commission Caltrans, Division of Aeronautics Department of Water Resources Resources Agency Resources, Recycling and Recovery California Department of Transportation, District 10

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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