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III IIIIIIIIIIIII III <br />999 <br />TWIN PINES INVESTMENT LIMITED PARTNERSHIP <br />FALCON ENERGY, INC. GENERAL PARTNER <br />TWIN PINES COAL MINE 112 <br />PHONE 784-3361 <br />CANON CITOY, COLORAD081212 ~1 ..,~~~~~~~ <br />May 13, 1986 MqY 3 6 eec <br />Mr. Gregg Squire ,~v <br />Mined Land Reclamation 141~Fdfi1 ~1i1~ ~`,:~.~,•~QT~;, <br />423 Centennial Bldg. t'~~C- ~~9?, C~.°f: '_-_i c~~`,G„~ <br />1313 Sherman Street <br />Denver, CO 80203 <br />SUBJECT: TWIN PINES N0. 2 MINE; PERMIT N0. C-058-83 <br />Dear Mr. Squire: <br />In accordance with Stipulation No. 1 and 2 of subject permit, the <br />Water Monitoring Report for the quarter ending April 15, 1986 is sub- <br />mitted herewith. <br />Mining has progressed as shown on the attached mine map. Minor <br />seepage is still present in mine entries adjacent to the abandoned Last <br />Chance workings. It appears that the amount of seepage has not substan- <br />tially increased with advance of the mine. Recent work in the intake <br />Entry of the 1st Right Section encountered a dip in the coal which is <br />producing the most seepage encountered to date. The areas is down dip <br />from the Last Chance working. The seepage probably is a function of water <br />levels in the old workings. Conclusions on the source and direction of <br />seepage may be substantiated when the Main and Return entries are driven <br />into the area and rooms are developed to the Southeast. Some drying of <br />seepage areas has occurred in the Main entries. Pumping rates from the <br />mine have not significantly increased during the quarter. Tests on a <br />water sample taken from the pool of water created by the dip in coal in the <br />1st Right indicated the following values: Temperature 52°F; Conductivity <br />1500 Micro Ohmms/cm; Iron 1.0 mg/1. Total flow into the mine is estimated <br />to be less than 1 GPM. <br />Water from the mine is discharged into the Bench Sedimentation Pond. <br />As of this date, no water has been discharged into Lewis Gulch. <br />Water level measurements and associated data for the monitoring wells <br />for the reporting period are as follows: <br />TPW-1 <br />Date: 2-28-86 3-25-86 5-13-86 <br />Conductivity: 680 680 780 <br />PH 9.0 8.0 8.0 <br />Level 141.5' 142.3' 141.8' <br />Temp 52°F. 53°F. 53°F. <br />CALDIROLA <br />Date: 2-28-86 3-25-86 5-13-86 <br />Conductivity 520 530 510 <br />PH 7.8 7.2 7.2 <br />Level 75.5' 74.' 75.2' <br />Temp. 47°F. 49°F. 52°F. <br />