Revised On: Dec. 2nd, 2024 - 12:04 pm
This permit of interest online resource provides interested parties easy access to information about the Pinyon Plain Mine, owned by Energy Fuels Resources (USA) Inc. (EFRI), formerly Canyon Mine.
Facility Information
Pinyon Plain Mine is a uranium mine owned by EFRI and located in Coconino County. It operates under a United States Forest Service (USFS) Record of Decision (ROD) and detailed Plan of Operations approved by USFS and prepared after USFS completed its Environmental Impact Statement (EIS) under the National Environmental Policy Act.
Location
The facility is located in north central Arizona, about 6 miles southeast of the Town of Tusayan in the Tusayan Ranger District of the Kaibab National Forest, approximately 9 to 15 miles south of the Grand Canyon.
Permits and Documents:*
- Minor Amendment (2024)
- Individual APP Permit (2021) & Minor Amendment (2022)
- Individual APP Permit | View >
- Executive Summary | View >
- Summary and Response to Public Comments | View >
- Minor Amendment Application | View >
- Minor Amendment Executive Summary | View >
- Arizona Pollutant Discharge Elimination System (AZPDES) Industrial Stormwater Mining Multi-Sector General Permit | View >
- Environmental Impact Statement (EIS) — The 1986 decision to issue the EIS was upheld in appeals and court cases. Additional facility history, court decision documents, and related information are available on the USFS Pinyon Plain Mine webpage | Visit Website >
Inspections and Enforcement:*
Compliance Reports
Quarterly Reports
Quarterly water quality monitoring results as required by the Individual APP permit:
- The facility monitors the quality of the discharge from the outflow pipe from the mine shaft and into the lined impoundment with as well as four Point of Compliance (POC) groundwater monitoring wells:
- POC #1, POC #2, and POC #3 wells are in the Coconino aquifer
- POC #4 well is in Redwall-Muav aquifer
- These POC wells are sampled to measure groundwater quality in comparison to established limits, which were based on natural groundwater conditions for the site.
- The permit has set Alert Levels (ALs), which serve as early indicators, set below the Aquifer Quality Limit (AQL). The AQL is established as the level the facility must not exceed to be protective of groundwater quality.
Compliance Reviews and Data
The quarterly results show the date of sample collection, sampling frequency, the sampling results for each parameter with the associated monitoring point(s). Where applicable, the established limits for each parameter are included for groundwater monitoring in the form of ALs, and AQLs.
Annual Report
- January 2024 (2023 data) | View >
*For older permits and documents, please submit a records request | Submit >
Looking for air quality permitting related to this facility? | View >
