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Pepe-y PEABODY ENERGY April 5, 2007 701 Market Street fit. Louie, MO 63101-162fi 314.342.3400 Colorado Department of Public Health and Environment Water Quality Control Division R~CCi~I~~~ Permits and Enforcement Section WQCD-PE-62 ApR 0 6 2007 4300 Cherry Creek Drive South Denver, CO 80246-1530 Diviswn of Feclamation, Mminy and Safety Re: Permit No. COG-850008 Quarterly Discharge Monitoring Reports Dear Sir or Madam: Pursuant to the requirements contained in Colorado Discharge Permit COG-850008 for the Hayden Gulch Loadout facility, enclosed please find the 151 quarter 2007 discharge monitoring reports for Outfalls 001A and OOZA. Discharge was observed from Outfall 001A during March. There were no observed discharges from Outfall 002A during the quarter. A discharge from Outfall 001A was observed on March 16, 2007, which was a result of snowmelt runoff raising the water level in the sedimentation pond to the elevation of the principal spillway. A sample was collected for laboratory analysis. The measured flow rate was 13 gallons per minute (gpm; 0.019 million gallons per day [MGD]). NGTI estimates that this discharge rate lasted for 10 days. Discharges were also observed on March 20 and 28, 2007. These discharges were a result of a faulty principal spillway structure. The 12-inch Waterman headgate on the barrel pipe is not properly sealed and is leaking. In addition, water leaks into the barrel pipe through two small holes along the bottom of the pipe. Measured flow rates were 3.9 gpm (0.006 MGD) on March 20`" and 3.4 gpm (0.005 MGD) on March 28~'. Repairs are planned. If you have any questions, please do not hesitate to contact me at 307-687-3903 or Mr. John Weinman, the Certified Operator-in-Charge, at 970-871-6125. Sincerely, , (. Ja .~n rian P. Dunfee Director, Environmental Services enclosure cc; Byron Walker; Colorado Division of Reclamation, Mining and Safety John Weinman„ Hydro-Environmental Solutions, Inc.