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-. <br />. OF c0~ <br />~Q~ 090 <br />~, .... o <br />. ''~ ~ r1 . <br />~ ~ ~.+` <br />~ X876' <br />Richartl D. Lamm <br />Governor <br />DATE: <br />DEPARTMENT OF NATURAL RESOURCES <br />David H Getches. Executwe Director <br />MINED LAND RECLAMATION DI\ <br />DAVID C. SHELTO N, Director <br />February 27, 1986 <br />T0: Peter O'Connor <br />FROM: Steve Renner <br />RE: CHIMNEY ROCK COAL MINE ANNUAL HYDROLOGIC REPORT, 1985 CAL ENDER YEAR <br />I have recently reviewed the Chimney Rock Coal i9ine Annual Hydrologic Report <br />(AHR) for calender year 1985, also submitted with this report was the fourth <br />quarter 1985 pond inspection report. <br />Ponds <br />No problems with any ponds were noted during the <br />inspection, Snow cover at the site prohibited a <br />Note that the 002 Pond is 25% full of sediment. <br />permit or by written communication, should state <br />capacity for this pond is while still being able <br />event. For most ponds the clean out level is 60% <br />Surface Water <br />December 18, 1985 <br />through inspection, however. <br />The operator, either in the <br />what maximum sediment storage <br />to store a 10 year, 24 hour <br />storage capacity. <br />The monitoring program was designed to collect data from Stollsteimer Creek <br />above (S-1), at (S-2) and below (S-3) mine disturbance, each site is monitored <br />monthly for discharge, and quarterly for water quality. In addition, Deep <br />Canyon Creek is monitored for discharge during periods of flow (usually march <br />through July). This is not required by the approved permit. <br />Flow of Stollsteimer Creek is seasonally variable, with highest flows expected <br />during spring runoff. Discharge decreases through the summer. Base flow <br />conditions generally exist from early to mid fall. <br />The mining operation has <br />Stollsteimer Creek. The <br />surface waters were util <br />months, pumps water from <br />is not thought that this <br />on it. <br />had little impact to the quantity of flow in <br />report erroneously states that "during production, no <br />ized for operations:. The operator, during the summer <br />the creek to be used for dust control purposes. It <br />adjudicated use of the creek has a significant impact <br />The quality of water appears to be unaffected by mining. The water type is <br />predominantly calcium - sulfate; calcium - bicarbonate. This compares <br />favorably with baseline information, and is not typical for streams incised in <br />the Fruitland Formation. No significant increases in total <br />suspended/dissolved solids were observed in Stollsteimer Creek. <br />423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />