Idaho-Maryland Mine Project


SCH Number
Lead Agency
Nevada County
Document Title
Idaho-Maryland Mine Project
Document Type
NOP - Notice of Preparation
Project Applicant
Rise Gold Corporation
Present Land Use
The project includes the Centennial Industrial Site, which is vacant and covered in scattered trees, and the Brunswick Industrial Site, which contains a clay-lined pond, paved areas, and forested area. The project site is zoned Light Industrial (M1) and M1 with Site Performance Combining District (SP), and designated Industrial by the General Plan.

Document Description
The proposed project would reinitiate underground mining and gold mineralization processing for the Idaho-Maryland Mine over an 80-year permit period. Following completion of mining and processing activities, the project sites would be reclaimed to open space and industrial uses. The project would involve dewatering, underground mining, aboveground processing operations, industrial pad development, construction of a buried potable water pipeline, and site reclamation.

Contact Information
Matt Kelley
Nevada County Planning Department
950 Maidu Avenue, Suite 170
Nevada City, CA 95959

Phone : (530) 265-1222


39°12'36.26"N 121°1'10.75"W
Nevada City
Citywide Countywide
Cross Streets
East Bennett Road and Brunswick Road, and Idaho Maryland Road and Centennial Drive
Total Acres
Parcel #
006-441-003, -004, -005, -034; 009-630-037,-039; 009-550-032, -037, -038, -039, -040; 009-560-03
State Highways
SR 49, SR 174
Nevada County Airport
Union Hill Elementary, Bell Hill Elementary, Margaret G Scotten
Wolf Creek, South Fork Wolf Creek

Notice of Completion

Review Period Start
Review Period End
Development Type
Industrial (1262000 Sq. Ft., 15 Acres) Mining (Gold Mineral)
Local Action
Rezone Use Permit Other Action Variance to Building Height Limits, Management Plans, Voluntary Merger or Boundary Line Adjustment, Reclamation Plan, and Financial Assurance Cost Estimate
Project Issues
Air Quality Archaeologic-Historic Biological Resources Drainage/Absorption Flood Plain/Flooding Geologic/Seismic Greenhouse Gas Emissions Minerals Noise Population/Housing Balance Public Services Soil Erosion/Compaction/Grading Toxic/Hazardous Traffic/Circulation Vegetation Water Quality Water Supply Wetland/Riparian Growth Inducing Land Use Cumulative Effects Other Energy, Wildfire
Reviewing Agencies
California Air Resources Board California Department of Fish and Wildlife, North Central Region 2 California Department of Forestry and Fire Protection California Department of Parks and Recreation California Department of Resources Recycling and Recovery California Department of Transportation, District 3 California Department of Transportation, Division of Aeronautics California Department of Water Resources California Energy Commission California Governor's Office of Emergency Services California Highway Patrol California Natural Resources Agency Central Valley Flood Protection Board 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 Drinking Water, District 9 State Water Resources Control Board, Division of Water Rights State Water Resources Control Board, Divison of Financial Assistance California Native American Heritage Commission California Department of Conservation California Regional Water Quality Control Board, Central Valley Sacramento Region 5


Environmental Document
Idaho-Maryland Mine_NOP   PDF 10596 K Idaho-Maryland Mine_Summary Form   PDF 200 K
Idaho-Mayland Mine_NOC signed   PDF 425 K
State Comments
2020070378_Conservation Comment   PDF 470 K 2020070378_NAHC Comment   PDF 501 K 2020070378_RWQCB Comment   PDF 315 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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