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r~ <br /> <br />Mr. Robert G. Liddle <br />Reclamation Specialist <br />Page 2 <br />RE: Hubbard Creek Flooding <br />Tuesday morning an assessment of damage was made. An estimated 30-40 <br />tons of coal was washed from the coal stockpile. Of this coal, the majority <br />of the +2" coal was caught in the grass and brush along the creek bank along <br />with some of the fines. An estimated 10-20 tons of coal may have been wash- <br />ed down the creek. At pond !t4 the primary spillway was still intact but the <br />12" emergency spillway washed out. Only a minor amount of sediment from the <br />pond washed out. Further up the creek It3 pond (NPDES 002), which had little <br />or no water in it, backfilled with water when the high water level raised <br />above the emergency spillway on the pond. No damage was done to pond It3. <br />At the pond Itl (NPDES 001) water flowed over the bank of the creek into the <br />pond along the north side. The primary and emergency spillway handled most <br />of the water but some spilled over the south embankment. This embankment <br />suffered only minor erosion. <br />As further precautions for possible additional high water, a diversion <br />trench was dug in the mine access road around the culvert, scale house, and <br />Ito pond to carry creek overflow back into the creek. Dirt was placed along <br />the edge of the coal pile to prevent erosion in the event that the 10' wide <br />by 12-18" diversion trench does not contain the flooding. To prevent fur- <br />ther washing of the coal on the creek bank into the creek a straw dike will <br />be installed between the creek and the coal on the bank. Building up the <br />creek bank on the north end of pond Itl may be done as time and conditions <br />permit. Nothing will be done about pond It3 backfilling during the high <br />flow. <br />Long term corrections have not been determined yet. Likely solutions <br />may be to install a higher more substantial head wall above the mine access <br />culvert, and to build a rip-rapped emergency overflow spillway in Pond Itl. <br />Pond Ito will be repaired as conditions warrant. Cleanup methods for coal <br />on the creek bank have not been determined yet. <br />If there are any further questions, please feel free to contact me <br />at 856-6402 or 929-5911. <br />Yours very truly, <br />~~~ ~~ ~~ <br />~~~~ <br />Larry M. Reschke <br />Mine Engineer <br />LMR:Cmm <br />cc: William Tate <br />Jay Reynolds <br />Jon Kubic: Colorado Department of Health <br />U.S. Enviornmental Protection Agency <br />