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l~~.x- <br />STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1373 Sherman S[., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 6663567 <br />FAX: (303) 832-8106 <br />January 20, 2004 / <br />Mr. Ed Cooley <br />American Soda, LLP `/ <br />2717 County Road 215 <br />Parachute, CO 81635 / <br />RE: American Soda, LLP, Yankee Gulch Minerals Project, Permit No. M-1999-002 <br />Plugging and Abandoning Well 20-12 r, <br />Dear Mr. Cooley, <br />COLORADO <br />D t V[ S f O N O F <br />MIN SRALS <br />GEOLOGY <br />RFC LANATION•NINING <br />SAFETT•SCIENCE <br />Bill Owens <br />Governor <br />Greg E. Watcher <br />Executive Director <br />Ronald W. Cottony <br />Division Director <br />Natural Resource Trustee <br />The Division received notice from American Soda that Well 20-12 will be plugged and abandoned due <br />to the inability to maintain the mechanical integrity of the well casing. American Soda intends to install <br />a Time Domain Reflectometery Cable (TDA) in the T short string casing after the removal of the 4' <br />production tubing and at the installation of a cast iron bridge plug. <br />The Division does not believe that a revision to the DMG Permit needs to be filed at this time for the <br />installation of the TDR cable on We1120-12. The approved subsidence-monitoring plan includes a <br />combination of the TDR and borehole geophysical techniques (natural gamma log) to determine <br />subsurface movement. Any changes to the subsidence-monitoring plan noted above will require the <br />filing of a technical revision to the permit. In addition, if American Soda intends to change the plugging <br />and abandonment plan, then the Division should be notified, and a determination will be made if such <br />change requires a revision to the permit. <br />The Division would like to conduct an inspection of the site during the plugging of We1120-12. Please <br />inform the Division as to when well plugging will commence. <br />If you have any questions, please do not hesitate to contact me at 303-866-4943. <br />Si ly, <br />ros-by / <br />Environmental Protection pecialis[ <br />Enclosure / <br />cc: Carl Mount; DMG (via e-mail) <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />