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REncE c. WRITE P.E. III IIIIIIIIIIIIIIII 1650 M. STREET PENROSE, COLORADO 81240 August 4, 1993 RF;`.~ ' Ms. Shawn Smith 1993 Division of Minerals and Geology AUG 5 Room 215, Centennial Building 1313 Sherman Street Denver, Colorado 80203 Divicip!,,,, ,,.,,,~ _., ., ._ . _ , Subject: Twin Pines No. 2 Mine, Permit No. C-058-83 Dear Mrs. Bege~: 719-372-6461 In accordance with Stipulation Nos. 1 and 2, as revised by Technical Revision No, 1, to subject permit the "Water Monitoring Report" for the period 1/93 to 7/93 is submitted herewith. During the period second mining was completed in the Main Entries to the Second West Section. Three new entries were started between the First West and the Second West. The fully mined workings were sealed in May and continous pumping from the mine~~discontinued. No significant water is expected in the near future development of the 3 entries to the South. Discharge from the mine is being monitored in accordance with the re- quirements of Stipulation Nos, 1 an Z and the NPDES permit. Copies of discharge logs, sample logs, NPDES reports, and Mine Map is enclosed. Water level measurements and associated data for the water monitoring wells for the reporting period are as follows: TPW-1 CALDIROLA NO, 2 DATE: ------------ 11/2/92 -------- 1/27/93 ---------- 6/22/93 --------- 11/2/93 --------- 1/27/93 ---------- 6/22/93 -------- - - - -- ------------ CONDUCTIVITY -------- 780 ---------- 780 --------- 680 --------- 680 ---------- 680 - - - 740 PH 8.5 8.5 8.5 7.5 7.5 7.5 LEVEL 145.1 145.1 143.2 89.2 89.4 9D.1 TEMPERATURE 51°F 51°F 53°F 51°F 55°F 55°F There again appears to be no significant impact on the wells from pump- ing from the mine. Samples for the water quality analysis of well no. TPW-1 were taken in June 1993. The results of the analysis is enclosed. Respe~ ely b fitted, L.G. White for TWIN PINES INVESTMENT LIMITED PARTNERSHIF FALCON ENERGY ZNC., GENERAL PARTNER