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Richartl D. Lamm Governor DEPARTMENT OF NATURAL RESOURCES David H. Getches, Executive Director MINED LAND RECLAMATION DI\ DAVID C. SHELTON, Director DATE: July 11, 1985 T0: Sue Mowry FROM: Bob Liddle ~~~ RE: Mid-Term Permit Review - Blue Ribbon Mine The following are my comments which should be included as part of the mid-term review. RECLAMATION 1. Page 108 of the application states that the portals will be sealed with non-combusti ble fill. Blue Ribbon should indicate the source of this material. T he availability of fill material may affect the bond amount. 2. In light of the fact that the Blue Ribbon Mine is now experiencing significant mine inflows, it should be discussed whether a discharge from the portals is possible. If so, Blue Ribbon should include a portal seal design that will prevent discharge through the portal and on the bench. 3. In light of the recent reconstruction of the mine bench, it is not clear how and to w hat configuration backfilling will occur. Blue Ribbon should indicate wha t fill will be used to backfill the highwall while still maintaining bench drainage and four foot cover requirements. A topographic map or cross-section showing final configuration should be submitted. 4. The application indicates that all facilities, including ponds, will be reclaimed immediately after mining. However, Rule 4.05.2 (2) requires that ponds be retained until erosion control and revegetation is acceptable (see Rule for details). Blue Ribbon should amend the reclamation schedule to provide for removal of the ponds when the erosion control and revegetation requirements are met. 5. The reclamation and removal of the stream crossing (culvert) was not specifically addressed. A plan for removing the stream crossing should be addressed. 423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 iii iiiiiiiiniuiii 999