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interoffice <br />MEMORANDUM <br />to: File C-81-019 Colowyo Coal Mine, 2003 Annual Hydrology Report <br />from: Byron G. Walker <br />subject: Review for Compliance <br />date: Apri128, 2004 <br />amended May 6, 2004 <br />Rule 4.05.9(17) All impoundments shall be examined at least quarterly by a qualified person <br />designated by the operatorz for appearance ofstructural weakness and other hazardous conditions] <br />The reports shall be retained at or near the mine site°, and a copy of the report shall be submitted to <br />the Division on a quarterly basis, or other approved submittal frequencys. <br />With the exception of inspecting six impoundments (Wash Bay Pond, Taylor Pump Holing Pond, <br />Aeration Pond, North Overflow Pond, South Overflow Pond, and the Sediment Sump Pond) <br />during the 2nd Quarter, the report demonstrates compliance with this rule. The missing reports <br />were submitted on Apri129, 2004. `The reported dates of inspections aze presented in the <br />following table. zA qualified person (Kurtis Blunt) made the inspections and the report is <br />certified by a registered professional engineer (Jaye Pickart). 3The ponds were inspected for <br />appearances of structural weakness, erosion and other hazardous conditions Reports are <br />maintained at the mine site4 as validated by Division of Minerals and Geology (Division) <br />quarterly coal complete inspections at the site. A copy of the report(s) is submitted to the <br />Division on an annual basis (by April 1 following) in the Annual Hydrology Report (AHR) <br />(Permit page 4.05-115). Colowyo was permitted to reduce the frequency of inspection for stock <br />ponds/small depressions on June 5, 2002. Maintenance was accomplished as indicated. <br />Im oundment' 1~` Quarter 2" Quarter 3' Quarte 4` Quarter <br /> <br />Streeter Fill <br />OOIA 3111103 6-30-03 9-19-03 12-31-03 <br />Work Area 002A 3/11/03 6-30-03 9-19-03 12-31-03 <br />Gossard Loadout <br />003A 3/11/03 6-30-03 9-19-03 12-31-03 <br />Gulch A 004A 3/11/03 6-30-03 9-19-03 12-31-03 <br />Stoker Sidin 3/11/03 6-30-03 9-19-03 12-31-03 <br />~ Impoundments are identified by name and Colorado Discharge Permit System (CDPS) identification numbers. <br />Z This report also serves as the annual impoundment inspection for these ponds. <br />