Laserfiche WebLink
S ~- <br />.-. <br />October 2, 2003 <br />Mr. Jim Burnell <br />Environmental Protection Specialist ~~~~I~~® <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 ~~ ~ ~ 6 203 <br />Denver, Colorado 80203 <br />Division of Minerals and Gealagr <br />Re: Permit C-1981-022, Oxbow Mining L.L.C. <br />2003 Annual Subsidence Report <br />Dear Mr. Bume11: - - <br />This subsidence monitoring report is submitted as required by Permit C-1981-022, PAP <br />Section 2.05.6, page 2.05-104. <br />Summary - 2003 Subsidence Survey Results <br />Subsidence surveys conducted during 2003 indicated that no visible signs of recent mass <br />movement was apparent and no new mass movement features were noted during the June <br />and October, 2003 subsidence inspections. <br />Discussion <br />Sanborn Creek Mine <br />During June and October of each yeaz, Oxbow Mining L.L.C. (OMLLC) is required to <br />visually inspect the pre-existing mass movement features located within the permit area in <br />the vicinity of the Sanborn Creek mine Particular attention is to be focused upon the <br />landslide located on the east valley slope of Coal Gulch, the landslide features located within <br />the unnamed drainage between the Sanbom Creek and Coal Gulch drainages, and the <br />landslide located on the west valley slope of Hawksnest Creek. If significant new mass <br />movement features aze noted, they aze to be brought to the attention of the Division. <br />During the past five years, a visual subsidence-monitoring program had become part of the <br />routine monitoring of Springs 1 through 11. Springs 1 through 6 are reached from the <br />BLM/ U. S. Forest Service road located in the Coal Gulch drainage. During trips to these <br />springs from April to October, the higher elevations of the permit azea for the Sanborn <br />Creek Mine and the Sanborn East Tract were visually inspected for mass movement <br />features, with particulaz attention focused on the landslides in Coal Gulch and Hawksnest <br />Creek. Springs 7 through 11 are located along old Highway 133 in the lower elevations of <br />the permit area for the Sanborn Creek Mine and the Sanbom East Tract. During monthly <br />monitoring the lower elevations were visually inspected for mass movement features, with <br />3737 Hwy 133 P.O. Box 535 Somerset, Colorado 81434 USA <br />TEL (970) 929-5122 FAX (970) 929-5177 <br />