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• pond water and would be performed only after notice was given and permission received from CDPHE personnel. 4. Colowyo requests the ability to drain backwash water from the proposed new reverse osmosis water treatment plant to an unlined storage pond. Colowyo respectfully requests use of this water for dust suppression on roads. A maximum of 10,000 gallons per day would be drained to the collection pond. Based on historical hydrology of the area, contact between the drained water and surface waters is not anticipated. A copy of the expected water quality from the water treatment plant is provided in the following application materials. 5. Colowyo requests the ability to discharge potable water to surface water systems. Colowyo's potable water distribution system is spread over an extensive area and our water use is relatively small at the lower end of the system. In order to minimize the formation of disinfection by-products created by our chlorination program, ensuring tank turnover times of 3-5 days (maximum of 7 days) would be very helpful, especially during the summer months. The increased "use" of stored potable water would speed the rate of turnover in the system and help facilitate compliance with state drinking water regulations. GENERAL DISCUSSION CPDS Impoundments -During calendar year 2003, the ten CPDS impoundments were inspected on a quarterly basis. Routine maintenance was performed when necessary during the year. None of the impoundments displayed any structural weakness or otherwise hazardous conditions. Table 1. Summary of material removed from CPDS impoundments in 2003. AMOUNT OF POND CLEANED OUT MATERIAL REMOVED TIME OF REMOVAL Rail Loop Pond 250 Bcy October West Pit Pond 500 Bc October Washbay Sediment Sump (Small Impoundment) 1000 Bcy October Small Impoundments/Livestock Water Tanks -During 2003, the thirteen Livestock Water Tanks were inspected during the third quarter. Livestock Water Tanks are being inspected on an annual basis. The impoundments did not display any signs of structural weakness or otherwise hazardous conditions. Faded impoundment identification signs were repainted in November. The impoundments that are not considered NPDES ponds or Livestock Water Tanks were inspected during the third and fourth quarters of 2003. The quarterly inspection requirement for these impoundments was also waived by TR-55. These impoundments were inspected during the fourth quarter of 2003 for reasons of internal monitoring and convenience.