Laserfiche WebLink
J. J. Dudash -2- February 3, 2010 <br />BRL - A log for TC-03-03 was added to Map-8. It shows there are 23 feet of mudstone, 28.3 <br />of sandy mudstone, 4.0 feet of sandstone and 19.2 feet of coal between the Rollins <br />sandstone and the bottom of the upper B-Seam. Pages 2.05-75ii, 76 and 81 were amended <br />to discuss the hydraulic isolation of the Rollins sandstone. <br />3. DRMS - The proposed geotechnical hole which would be located by monitoring well TC-03- <br />01 is described in the cover letter to the application. Based on discussion with J. E. Stover & <br />Associates the geotechnical hole is in the same location as the ventilation shaft being <br />proposed for TR-66. It is unclear whether BRL will abandon the geotechnical hole prior to <br />vent shaft installation. Please describe the abandonment plans for the geotechnical hole and <br />how this will be coordinated with ventilation shaft construction. <br />BRL - The geotechnical hole will be located near the center of the proposed shaft. The <br />geotechnical hole will be obliterated when the shaft is raised. <br />4. DRMS - A dip-slip fault is known to exist within the permit boundary in the immediate area of <br />the proposed main entries beneath Terror Creek. The strike and the displacement of the <br />fault are shown on Map 08 of the permit application. Based on review of available <br />information it appears that the fault will be encountered at the First Quarter 2010 main entry <br />located to the east of Terror Creek. Significant quantities of water from mine inflow may be <br />encountered at the fault location during mining of the main entries. If available, please <br />provide the Division with an estimate of the quantity of mine inflow water that could <br />potentially be encountered due to development mining across the fault location. Please <br />provide revised text describing BRL's plan for controlling and handling the water, if <br />significant amounts of mine inflow are encountered. <br />BRL - BRL has mined through the fault located in the 1 West Main entries located east of <br />Terror Creek. No significant water was encountered. The mine personnel described the <br />inflow as nuisance water. <br />Subsidence <br />5. DRMS - Please update the first sentence in the last paragraph on permit application page <br />2.05-99 to state that portions of the Terror Creek road are within the permit area, as well as <br />within the adjacent area. <br />BRL - Enclosed is amended page 2.05-99. <br />6. DRMS - Please update the discussion in Section 2.4, Buildings and Structures, of Exhibit 15 <br />in Volume 111 to include the Western Area Power Administration Curecanti-Rifle transmission <br />line and the two transmission line towers. <br />BRL - Pages 25, 26 and 35 of Exhibit 15 were amended to discuss the effect subsidence <br />could have on transmission lines and transmission towers. <br />7. DBMS - On Map 27, the depiction of the D-seam workings is much more prominent than the <br />depiction of the B-seam workings. Please revise the depictions of the B-seam and D-seam <br />workings on Map 27 so that both depictions are more or less equal in prominence. <br />BRL - The color of the B-Seams completed workings was amended.