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<br /> <br />Sux`e <br /> <br />Ft. Fill <br />5 Feet <br />Concrete Plug <br />~'~ 50 Ft..Concrete <br />~- or Bentonite Plug Gel <br />°'~"Y'~•H2O Aquifer <br />50-Ft. Concrete <br />or Bentonite Plug Gel <br />-•~ 50 Ft. Concrete <br />~;' or Bentonite Plug Gel <br />Coal Zone. <br />::?'; <br />''' 50 Ft. Concrete <br />;.i•. <br />••: or Bentonite Plug Gel <br />.. n <br />Item A <br />1. Hole must be baekfilled with as <br />many cuttings as possible. All <br />remaining cuttings must be <br />dispersed evenly over the <br />surrounding surface. <br />2. Hole must be blocked to a depth <br />of five (5) ft. below collar <br />with a snort hole plug. If water <br />is encountered in the drill hole, <br />a concrete plug"must be set <br />below ground three•(3) ft. The <br />upper three (3) ft. of the hole <br />is then filled with cuttings and <br />soil. <br />3. All water bearing zones will be <br />concreted or sealed with a <br />Bentonite gel plug if a well is <br />not developed. If coal seams are <br />encountered, 'they must be sealed <br />in the same manner. <br />4: All sump holes used during <br />drilling must be drained and <br />backfilled. <br />5. The site around the hole must be <br />cleaned up and surplus cuttings <br />leveled. Seeding disturbed areas <br />may be required. <br />.wr <br />i <br />~n <br />E <br />,s <br />w <br />C1 <br />O <br />U? -~ <br />_; .. <br />~U. <br />^'r7 <br />;~: <br />-n -~- <br />_,~ <br />m <br />ABANDONMENT OF SHALLOW DR-ILL HOLES <br />NORTHERN ROCKY MOUNTAIN REGION <br />