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iii iiiiiiiiiiiiiiii <br />CENTEX EACLE GYPSUM COMPANY, L.L.C. <br />P.O. Box 980 <br />GYPSUM, COLORADO $1657 <br />(970) 524-9700 <br />September 20, 2001 Fax: (970) 524-8140 <br />RECEt~,E~ <br />Mr. Gregg Squire ~ ~ ~~ 1~'1 / 9 ~yI G~l SEP 2 1 .~ ` <br />Colorado Division of Minerals and Geology r <br />1313 Sherman St., Room 215 Oiuision of Minerzls and Geala~y <br />Denver, Colorado 80203 <br />Dear Gregg: <br />In recent review of our records it appears that a Notice of Proposed Backtill <br />Activity is apparently not on file for our on going mine reclamation project referred to as <br />the "old mine". This notice is in accordance with the rule described in 3.1.5(9) of the <br />Colorado Land Reclamation Act for the Extraction of Construction Material. The <br />reclamation site referred to is within the boundaries of DMG Permit #M1984-018. The <br />actual area of activity is approximately 10 acres. <br />The reclamation procedure at the site consists of backfilling previously mined <br />escarpments with waste (ofd spec) gypsum wallboard. Gypsum wallboazd is considered <br />to be inert material and the backfill material has been kept free from any other debris. <br />The backfill material is placed in one-foot lifts, compacted with a track dozer, and then <br />capped with intrusive clastic material (dirt and rock) that is available from the active <br />mining operation. Topsoil stored in the area is then utilized in 6" layers. Stockpiled tree <br />limbs (from pre-mining clearing operations) are also scattered for an additional <br />reclamation effect. Seeding takes place when a plot in the range of 0.5 to 1.0 acres is <br />ready for final reclamation. <br />It is possible that approximately 100,000 tons of wallboard will be placed in the <br />reclamation slopes before the project is completed. As I understand the Notice rules, <br />there is a requirement to submit approximate dates of proposed backfill activity - <br />although those dates are not an enforceable condition. Reclamation backfill activity in <br />this area should be competed in the early part of 2003 and final capping, topsoil <br />placement and seeding will follow shortly thereafter. <br />Please advise me of any further requirement to meet notice requirements - or if <br />any further clarification is required for the process. <br />Yours verb t~I , <br />~:>`~ <br />Stephen A. Onorofskre <br />Mine Manager <br />