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-~ <br />~. <br />,- <br />Bill Owens, Governor <br />Jane E. Norton, Executive Director <br />III IIIIIIIIIIIIIIII <br />STATE OF~ COLORP~DU <br />Dedicated to protecting and improving the health and environment olthe people o(Colorado <br />4700 Cherry Creek Dr. 5. <br />Denver, Colorado 80246-1530 <br />Phone (3031 692-2000 <br />Located in Glendale, Colorado <br />Laboratory and Radiation Services Division <br />8100 Lowry Blvd. <br />Denver CO 80220-6928 <br />(303) 692-3090 <br />http://swnv.cdphesrate.co.us <br />OF' ~~[~ <br />R~' ~ <br />N~% ~~ <br />•«•r: <br />RECEIVED~totado n <br />epulmcnt <br />of Public Health <br />JUN ], g ~ggg and Environment <br />Division of Minerals 8 GeoJajy <br />June 9, 1999 <br />James A. Kiger <br />Colowyo Coal Company <br />5731 State Highway 13 <br />Meeker, Colorado 81641 <br />RE: Request for Alternate Limits Due to Snowmelt <br />CDPS Permit No.: CO-0045161; Outfall OlOA <br />Moffat County <br />Deaz Mr. Kiger: <br />This letter is in response to your letter's dated Apri126 and June 3, 1999, in which you provided <br />information regazding a snowmelt event that occurred during the week of February 23, 1999. In <br />your letters, you claimed: 1) that the pond, Outfa11010A, contained a volume of less than two and <br />one half (2.5) acre feet 2) The total pond volume below the emergency spillway invert was <br />approximately nine (9) acre feet 3) outfa110] OB was not dischazging during this event; and (4) that <br />temperatures were rising throughout the week thus increasing snowmelt in the azea. The self <br />monitoring data you provided on your first quarter Dischazge Monitoring Report is shown below: <br />utfall Pazameter Results Permit Limits <br />OlOA .TSS (mg/1) 40 (35 day avg) 30 (35 day avg) <br />O1 OA Iron, Total (mg/1) 8.35 (30 day avg) 3.5 (30 day avg) <br />OlOA Iron, Total (mg/1) 8.35 (daily trix) 7.0 (daily mx) <br />Coloywo has demonstrated that dischazge occurred within 48 hours after measurable snowmelt, <br />dischazge was beyond your control and that the required pond volume for a storm event was <br />available. We believe that Coloywo qualifies for the alternate limits of a less than or equal to 10- <br />yeaz/24-hour precipitation event, thus waiving TSS and Total Iron limits. <br />