2015-10-06_PERMIT FILE - C1981019A (3)

Home Browse Search

RULE 4 PERFORMANCE STANDARDS The purpose of the inspections is two fold. First, these inspections will document and certify that the construction plan is being followed. Secondly, during the above phases of the construction, a key emphasis of all inspections will be to implement routine contingencies as situations warrant. For example, perhaps a section of underdrain should be reworked, or the spoil dump raised to provide optimum gravity spoil sorting. Inspections and implementation of contingencies during these critical phases of fill construction will be a routine but very important component of fill inspections. 2. Each certified inspection report will be provided to the Division within two weeks after each required inspection. Each report will certify that the fill has been constructed as specified in the minimum design approved by the Division. The reports will include a description of any appearances of instability, structural weakness and other hazardous conditions observed during the inspection. Certified reports addressing the underdrain system will include color photographs taken during and after construction, but before the underdrain is covered with spoil. After construction, the fill will be monitored quarterly for the following items and reports will be submitted in the Annual Reclamation Reports. Monitoring will continue until such time that DRMS staff approve a revision to this plan. 1. The groundwater piezometer well will be established in the valley bottom and will be monitored quarterly for water level and the other parameters consistent with the present Colowyo groundwater monitor plan. 2. On a quarterly basis, a certified report by a registered engineer will be completed taking into consideration any changes and will note any evidence of surficial slope failure or the formation of springs or seeps on the face of the fill. 4.10-4.12 DISPOSAL OF EXCESS SPOIL These sections are addressed in the original permit. r,919�611WN10401211M71001109X"1110F1111110 All reclamation efforts, including backfilling, grading, topsoil replacement and revegetation of land disturbed by the mining activities in the Collom Lite and Little Collom X pits shall occur as contemporaneously as practicable with mining operations. Implementation of the reclamation plan, as described in Section 2.05.4, will assure that each step in the reclamation process is completed in a timely manner. Colowyo is formally requesting a variance for a delay in contemporaneous reclamation in the Collom Lite and Little Collom X mining areas as the requirements listed in Rule 4.14.1(1)(d) are unachievable. The sequence for reclamation following the mining process is shown on Map 29B (Spoil Grading — Collom). Final reclamation of the Little Collom X and Collom Lite pits will continue through 2033. A large, temporary out of pit stockpile of approximately 250 million cubic yards will be needed during the initial years of mining to establish the initial boxcut configuration for the Collom Lite and Little Collom X pits. Full establishment of the Collom Lite Pit Boxcut should occur approximately five years after ;Wining is initiated and backfilling activities should begin during that timeframs as illustrated on Map 29B. At that time, spoil regrading and su'l6sequent reclamation activities will accelerate. As activities progress, a sufficient volume of backfill void will be created, and the Collom Lite pit should reach a Collom — Rule 4, Page 27 Revision Date: 9/28/11 Revision No.: PR -03