Laserfiche WebLink
• I. STUDY OBJECTIVES <br />~::: <br />Objectives of this well testing study are to obtain values of aqui- <br />fer transmissivity from ten wells completed in the Upper Mesa Verde For- <br />mation. This information will be used to evaluate the potential Hydrolo- <br />gic effects of the Mount Gunnison No. 1 Mine which is currently mining <br />the "F" coal seam of the upper Mesa Verde Formation. Of the ten exist- <br />ing wells tested, four are completed in the "F" coal seam and the re- <br />maining six wells are completed in the overlying shale and sandstone <br />of the Barren Member of the Upper Mesa Verde Formation. The present <br />mine is located near Somerset, in west-central Colorado. The ten wells <br />tested are located approximately 1 to S miles, generally south of the mine <br />as illustrated on Figure I-1. <br />Previous testing of wells by air-lift and pumping methods was large- <br />ly unsuccessful on many of the wells because of the low yields and con- <br />- siderable depths. Consequently, slug testing was chosen as a viable <br />': • means of obtaining transmissivity values for these wells. The parti- <br />cular slug tests selected have the advantages that no water needs to be <br />removed or injected into the wells, and with the testing apparatus used, <br />great depths to water do not significantly affect the reliability, dif- <br />ficulty, or cost of testing. Also, the slug tests are particularly well <br />suited to low transmissivity situations. <br /> <br />1 ESA Geotechnical Consultants <br />