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iii iiiiiiiiiiiu iii <br />Y.AISER COAL CORPORATION <br />r <br />-- / : ~ ~ t 02 SOUTH TEJON STREW. SUITE 800 ~ P O. ROX 2579 <br />..~ • ~ - COLORADO SPRINGS. COLORADO 80901 ~2fi79 <br />(303) 4757005 ~ TELEX 289 909 <br />June 19, 1987 <br />Mr. Thomas Schreiner <br />Mined Land Reclamation Division <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, CO 80203 <br />RE: erset Mirie - Subsidence Monitoring and Water Quality <br />Monitors- ng-bata to Abate N.O.V. No. C-87-012 <br />Dear Mr. Schreiner: <br />Please find enclosed the results for the first quarter 1987 <br />water quality monitoring data at our Somerset Mine (Permit No. <br />C-022-81) this data represents data for sampling sites H-1 and <br />H-10. It should be noted that there are r~ results for site <br />since ~ was drv when the sites were sampled on May 19, 1987. <br />Also please find the following data which represents the final <br />subsidence monitoring survey which was carried out on June 17, <br />1987. A copy of the past monitoring is attached for your <br />review. <br />COORDINATES (6/17/87) <br />Station North C an a East C an a Elevation Chance <br />HMS-1 14686.5 0 23190.8 -0.2 6361.6 +0.1 <br />HMS-2 14784.1 +0.1 23019.2 -0.3 6383.0 0 <br />HMS-3 14873.8 +0.3 23013.2 -0.3 6361.6 +0.1 <br />HMS-4 14974.7 +0.2 22948.9 -0.1 6369.9 -0.1 <br />HMS-5 15068.2 +0.2 22894.0 0.0 6359.2 +0.2 <br />HMS-6 15152.6 +0.1 22877.6 +0.1 6360.1 +0.1 <br />NOTE: 1. All values are reported to the nea rest 0.1 <br /> feet. <br /> 2. Refer to Map CS-1290 for location. <br />3. The changes which occur with all the <br />stations are due to a recent active land <br />slide which is directly uphill from all the <br />stations. <br />