2014-04-25_PERMIT FILE - C1982056A (3)

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using conventional rotary drilling methods and drilling mud as the circulation medium to depths ranging from 1,300 to 1,600 feet. 2012 WMD Seismic Survey (MR12 -265) TC proposes to complete a seismic survey to better define the geology of the coal seams and structural features in an area to the south of our present WMD. The proposed seismic survey will involve completion of five seismic lines, ranging from 5,500 to 8,800 feet in length (total length approximately 37,600 feet) utilizing the "Digipulse" method. This method involves the use of an all - terrain vehicle- mounted impact hammer, and geophones connected to a mobile truck- mounted receiver /recorder (see attached description). The proposed seismic program is anticipated to be completed during January 2013, therefore, a snow -cat may be utilized to remove snow to facilitate access. The proposed activities will, however, involve no direct ground disturbance, therefore there will be no bond associated with this project. TC has completed a wildlife consultation for the project, as documented by the wildlife consultation letter provided in Exhibit 23C, and will comply with the applicable conditions identified. All seismic survey lines will be accessed from Routt County Roads 37 and 27, and the survey lines have been laid -out to generally follow existing two -track ranch roads. It is anticipated that the project will take 3 -4 weeks to complete and will be completed in late January or early February 2013. The following outlines typical field operations for the planned seismic survey: 1. The site is first permitted and arrangements are made for survey crew access 2. The site is scouted and assessed, and survey parameters determined 3. A snow -cat is used to clear snow, as needed for access 4. A surveyor lays -out the geophone locations using wire stake flags approximately every 82 feet 5. The points are surveyed with GPS or optical survey equipment 6. Equipment to be used: a. One source truck b. Two line pick -up trucks c. Utility pick -up truck for trouble shooting d. Mobile and truck- mounted communication equipment e. ATV or snow machine f. Snow -cat or similar equipment, as needed for snow plowing 7. Crew Size: a. 10 -hour day b. Approximately 10 crew members 8. The proposed survey consists of 5 seismic lines totaling approximately 37,600 feet in length 9. A group of 4 geophones (2 -inch square plastic molded sensor with a 3 -inch long metal spike protruding from the bottom) spaced approximately 18 feet apart is placed every 82 feet along the receiver lines and connected by cables 10. The source truck moves along the survey line, and "thumps" every 82 feet, about 4 — 6 times per location 11. At a location proximate to the survey line, the recording trailer is parked and the data recorded on and displayed by a computer when the weight -drop source truck is activated 12. After the seismic survey activities are completed and recorded, a crew recovers the geophones, cables, and any flag markers Maps and additional details for the seismic survey project are provided in Exhibit 52. MR14 -275 2.05 -17.2 02/26/14