2016-04-08_PERMIT FILE - C1996083A

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2.05.6(6) Bowie No. 1 Mine Hydrologic Monitoring Summary Overburden No. Overburden Springs Range Ponds Range Total Analyzed 12 250 ft to 1950 ft 28 100 ft - 2200 ft -Less than 800' Overburden --- ------------------------------- -- 6-- -250 ft to 750 ft 6 ---- 100 ft - 750 ft ---------- Advance Only ----------------------- 3 ----- 400 ft to 700 ft ------------ 3 ---- 350 ft - 700 ft ---------- Secondary Mined 3 250 ft to 750 ft 3 100 ft - 750 ft Greater than 800' Overburden ----------------------- 6 ----- 900 ft to 1950 ft ------------ 22 ---- 850 ft - 2200 ft ---------- Advance Only 5 1400 ft to 1950 ft 12 900 ft-- 2200 ft Secondary Mined 1 1 900 ft 10 850 ft -1600 ft This data provides significant validity to the Operator's position that no subsidence protection will be provided for springs or ponds unless they are a decreed water right and only then if the spring or pond has an overburden depth of less than 800 feet. The Bowie No. 1 Mine also mined under the Pitkin Mesa Pipeline/Aqueduct at overburden depths ranging from 300 to 675 feet with no detrimental effects to the pipeline. Sheep Corral spring and pond SP -34-11 were undermined by the D -Seam during October 2003. The overburden at this location is slightly over 1,000 feet. There was no apparent damage to the spring and pond based on monitoring results since the spring and pond were undermined. The spring and pond were not mined under by the B -Seam. Pond and spring 20 were undermined by the B -Seam during May 2013. The overburden at this location is 1,250 feet. There was no apparent damage to the spring and pond based on monitoring results since the spring and pond were undermined. PR -14 2.05-161- 03/14