CX-008147: Categorical Exclusion Determination

Down Hole Hammer CX(s) Applied: B3.7 Date: 09/08/2011 Location(s): Wyoming Offices(s): RMOTC

Office of NEPA Policy and Compliance

September 8, 2011
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Down Hole Hammer
CX(s) Applied: B3.7
Date: 09/08/2011
Location(s): Wyoming
Offices(s): RMOTC

The purpose of this project is to test the functionality of Flexi Drill's Down the Hole Hammer. The project will run between 12 and 18 hours (drilling ~200 feet) on well 45-3-X-21. The test will likely end in the Madison or Amsden formation. The Down the Hole Hammer will use standard KCL Polymer Mud. It is not known at this time if the well will be plugged back or left open for another test. There is funding available to do an immediate plug back if that is the best course of action.