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~,~ ~r ~.~f United States Department of the Interior W - ~ r s9 BUREAU OF RECLAMATION ~_,~ g Upper Colorado Region ~~ ~E$b, _ '•- Western Colorado Area Office ~A ~p E 2764 Compazs Drivc, Suite 106 835E 2"^ Avcnuc, Suitc 300 Grind Junction CO 61506-8785 Durango CO 81361-5475 WCG-KOzga r •> '. ` .:' i `v ~~ LND-6.oo ~ 2 6 'pg Mr. Joseph Dudash `~~~ 2 9 2~~ Environmental Protection Specialist Division of Minerals and Geology o"""0n °~ M~noAia ~ G•olav,~ 1313 Sherman Street, Room 215 Denver, CO 80203 Subject; Bowie No. 2 Mine (Permit No. C-96-083), Technical Revision No. 37, Pond F Revised Discharge Structures Dear Mr. Dudash: This letter is in response to your June 17, 2005 letter and your subsequent letter to Bowie Resource LLC (BRL) dated July 14, 2005. We apologize for being late with our comments; however, we were unable to respond since we did not receive BRL's adequacy review submittal until July 12, 2005. , We have reviewed the above submittal and have the following remarks. In your letter of July 14, you wrote that the State's jurisdiction ends with the emergency spillway at the base of the Pond F embatllatlent and does not include the remaining channel structures. As a result, we request that Rip Rap Ditch (as shown on Section B and Section C of Figure 4 - Pond F Emergency Spillway), from the base of the Pond F embanlanent to the Fire Mountain Canal (Canal) to the end of our easement, be compacted in 6-inch lifts to 95 percent of maximum density as specified by ASTM D- 698-OOa. Since much of the embanlar7ent for this Rip Rap Ditch above and below the steel flume will need to be added to bring it to the finished grade or final ground as shown in Figure 4, we believe that a good compaction effort should be required on this material to ensure stability of this Rip Rap Ditch. Please note that our Canal easement is 100 feet wide (50 feet each side from centerline). • The detail for the Steel Flume (shown in Figure 3 -Coal Mine Waste Disposal Area Pond F Detail, dated 6/6/05) mentions that the flume will tie into the bridge steel for stability. Please clarify the location and stability of the bridge steel since we are unaware of the bridge containing steel. On our site visit on March 8, 2005, we did not note any steel on this bridge. • We request that BLR provide Reclamation and the Fire Mountain Canal and Reservoir Company (Company) 48 hours prior notice before construction on the emergency spillway channel and installation of the flume begins. The point of contact with Reclamation is Bob Major (970-248-0613), and Merritt Denison is with the Company (970-234-9198).