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-5- INTERFERE WITH OR INTERRUPT THE PERMANENT OPERATION OF THE DRAINAGE SYSTEM. THESE PLANS MUST BE SUBMITTED BY SEPTEMBER 30, 1981 IN THE CASE OF PLANS FOR THE CAPPING OF WELLS AND, IN THE CASE OF PLANS FOR THE SEALING OF PORTALS, SUCH PLANS MUST BE SUBMITTED SZX (6) MONTHS AFTER COMPLETION OF THE THREE (3J PORTALS INITIALLY PROPOSED TO BE INSTALLED AND THEIR ASSOCIATED DEWATERING FACILITIES. MLRD Findings Document: Stipulation No. 39, p. 45 NOTE: This stipulation is substantially the same as stipulation No. 37 of this memo. OSM Findings Ibcument: Stipulation No. 6, p. 5 as follows: 6. ARCO COAL must submit to the regulatory authority plans and specifications for the sealing of portals and capping of wells to demonstrate that the proposed sealing methods will not interfere with or interrupt the permanent operation of the drainage system. OSM TEA: Stipulation No. 2, p. 9 as follows: 2. Stipulation: In view of the location of the portals within a landslide block, and due to the proposed permanent drainage system at the portal benches to control movement of the block, the applicant shall submit detailed plans and specifications adequate to determine that the proposed devices will not interfere with, nor interrupt, the permanent operation of the drainage system. 11. Stipulation: ARCO WILL SUBMIT TO THE DIVISION, PRIOR TO ANY TOPSOILING REMOVAL, INFORMATION FROM A SOIL MONITORING PROGRAM (CONDUCTED PRIOR TO TOPSOIL STRIPPING) IF THE MONITORING PROGRAM DEMONSTRATES THE LESS THAN 18 INCHES OF SUITABLE TOP- SOIL IS AVAILABLE FOR REVEGETATION. INFORMATION FROM THE MONITORING PLAN WILL BE USED BY ARCO COAL AND THE DIVISION TO ESTABLISH AN APPROVAL SOIL HANDLING PLAN. MLRD Findings Document: Stipulation No. 26, p. 39 OSM Findings Document: Stipulation No. 8, p. 6 OSM TER: Stipulation No. 4, p. 17 12. Stipulation: UNTIL SUCH TIME THAT ARCO CAN DEMONSTRATE TO THE DIVISION THE FOLLOWING: 1) NON-COMBUSTIBILITY OF THE WASTE ROCK MATERIAL, 2) STABILITY OF WASTE ROCK STOCKPILE, RND 3J NON-TOXICITY OF WASTE ROCK MATERIAL TO SURFACE AND GROUND WATER AND VEGETATION, A FOUR FOOT COVER OF NON-TOXIC MATERIAL WILL BE REQUIRED FOR THE WASTE ROCK STOCKPILE. MLRD Findings Document: Stipulation No. 27, p. 39 OSM Findings IJOCUment: Stipulation No. 9, p. 6 OSM TEA: Stipulation No. 5, p. 17 13. Stipulation: ARCO COAL MUST COMPLETE PHASE II OF THE GEOTECHNICAL AND HYDROLOGIC STUDIES OF THE INITIAL WASTE PILE, AS OUTLINED IN PROPOSAL LETTER 3.2. ~1, INCLUDED 1 WITHIN THEIR PERMIT APPLICATION. ARCO IS FURTHER DIRECTED TO INCLUDE THE REPORT ~~ ENTITLED "REPORT, PRELIMINARY DESIGN RECOMMENDATIONS, INITIAL WASTE ROCK PILE, MT. GUNNISON COAL MINE, SOMERSET, COLORADO, FOR ARCO COAL COMPANY", PREPARED BY GEO- '~~HYDRO CONSULTANTS, INC. AS-AN EXHIBIT WITHIN THE PERMIT APPLICATION. FURTHER, RRCO IS DIRECTED TO PREPARE APPROPRIATE DETAILED DESIGN NARRATIVE, PLANS AND CROSS- SECTIONS OF THE INITIAL WASTE PILE, AND TO INCLUDE THEM WITHIN THE PERMIT APPLICATION. THE DETAILED ENGINEERING DESIGN SHALL CONFORM WITH THE RECOMMENDATIONS OUTLINED WITHIN THE GEO-HYDRO CONSULTANTS PHASE I REPORT. THE DETAILED ENGINEERING DESIGN