Documents related to Pinon Ridge Mill and the application for approval of construction of a tailings facility are available below.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
Cover Letter: Energy Fuels Resources Corporation (PDF)(2 pp, 77 K)
This letter is regarding construction, operating, and emission information for the evaporation ponds, Pinon Ridge Mill, Montrose, Colorado.
Application for Approval of Construction: Pinon Ridge Tailings Facilities (PDF)(8 pp, 2 MB)
Energy Fuels Resources Corporation (Energy Fuels) submitted this construction application to the U.S. Environmental Protection Agency (EPA) in compliance with 40 CFR Part 61, Subpart W for constructing and operating the first of three uranium/vanadium tailings disposal cells (Tailings Cell A), each encompassing approximately 30.5 acres.
(Attachment 1) Pinon Ridge Mill: Operating Plan Tailings Cells and Evaporation Ponds (PDF)(41 pp, 14 MB)
Operating Plan (Attachment A) for the Pinon Ridge Mill Application for approval of construction
(Attachment 2) Uranium Mill Tailings Radon Flux Calculations: Pinon Ridge Project, Montrose County, Colorado (PDF)(34 pp, 7 MB)
This report evaluates the operations of the uranium mill tailings storage facility at the Pinon Ridge Mill in terms of the 20 pCi/m
(Attachment 3) Pinon Ridge: Water Balance Calculation, Tailings Cell (PDF)(50 pp, 5 MB)
This revision of the Tailings Cell Water Balance for Energy Fuels Resources Corporation (EFRC) for the Pinon Ridge Project located in Montrose County, Colorado was prepared with calculations that were based on the water balance originally submitted as a part of the tailings cell design by Golder (2008a) for Tailings Cell A.
(Attachment 4) Tailings Cell Design Report: Pinon Ridge Project, Montrose County, Colorado (PDF)(382 pp, 41 MB)
This report was written to provide geotechnical design for construction of the tailings cells, evaporation ponds and ore pads at the Pinon Ridge Project.
Evaporation Pond Design Report: Pinon Ridge Project, Montrose County, Colorado (PDF)(183 pp, 14 MB)
This document provides information about the pond design of a new uranium mill located in Montrose County, Colorado.
Evaporation Pond Radon Flux Analysis: Pinon Ridge Project, Montrose County, Colorado (PDF)(20 pp, 494 K)
This document provides an evaporation pond radon flux analysis of a new uranium mill located in Montrose County, Colorado.
Raffinate Characterization: Pinon Ridge Mill, Montrose County, Colorado (PDF)(53 pp, 990 K)
Characterization of fluids from the production process for the Pinon Ridge Mill Application for Approval of Construction of Tailings Facility