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MINE SUBSIDENCE 1. Four subsidence pits and one trough. First pit is 15' in diameter, 10' deep and overlies air shaft. Two pits are 15' in diameter, 2' deep and overlie rooms. Fourth pit is 25' in diameter, 3' deep and overlies hoist shaft. Trough is 75' long, 30' wide, and 8' deep; trends WNW. 2. Large subsidence pit over and around hoist shaft. Pit is 80' long, 55' wide and 15' deep; walls of pit nearly vertical. 3. Three troughs. Two troughs of minor significance; one is 20' long, 12' wide, 3' deep; second is 20' long, 6' wide, 3' deep; both mark former adits. Third trough is 90' long, 20' wide and 4' deep; marks collapse of former adit. 4. Three subsidence pits, one trough. Subsidence pits are 10' to 15' in diameter and 3' deep; pits due to subsidence over rooms. Trough is 75' long, 20' wide, 7' deep; due to subsidence over incline entry. 5. Five subsidence pits, two troughs. Three pits are 15' to 25' long, 10' to 20' wide, 2' to 4' deep; due to subsidence over rooms. Two pits are 15' to 20' in diameter, 13' to 20' deep; due to subsidence around shaft and incline. Both troughs are 45' long, 15' to 20' wide, 3' deep; one due to collapse over room, other due to collapse over incline. 6. Subsidence trough. Trough is 60' long, 20' wide, 6' deep; due to subsidence over incline entry. 7. Subsidence pits. Two large pits, one 50' long, 30' wide, 4' deep; other 50' in diameter, 3' deep. Two small pits 6' and 10' in diameter, 3' deep. All four pits due to subsidence over incline entries. 8. Subsidence trough and subsidence pits. Trough is 60' long, 20' wide, 3' to 4' deep; due to collapse of incline entry. Subsidence pits range in size from 5' to 30' in diameter, 2' to 4' deep; due to collapse over rooms. 9. Subsidence trough and pits. Trough is 60' long, 20' wide, 4' deep; due to subsidence over incline entry. One pit 4' in diameter 15' deep; other pit 10' long, 6' wide, 2' deep; both pits due to subsidence over inclines. 10. Subsidence pits. Four pits ranging in size from 5' to 10' in diameter and 3' to 4' in depth. Subsidence due to collapse over mine incline. 11. Subsidence pits. Two pits 8' in diameter, 3' to 5' deep; one pit 15' in diameter, 5' deep. Pits due to subsidence over incline and behind mine entry. 1 12. Subsidence pit and trough. Pit is 10' in diameter, 12' deep; due to collapse around shaft. Trough is 50' long, 25' wide, 2' to 6' deep; due to collapse over incline. 13. Subsidence pits. One pit 45' in diameter, 10' deep; three pits ranging from 12' to 30' in length, 8' to 15' in width, 5' to 12' in depth; pits due to collapse over rooms. 14. Subsidence pits and troughs. Ten pits ranging in size from 10' to 50' in diameter, 3' to 17' in depth. Two troughs 45' and 50' long, 20' and 30' wide, 6' and 4' deep. Most of pits due to collapse over rooms. 15. Three subsidence pits. One pit 10 feet in diameter, 15' deep, due to collapse around air shaft; second pit 30' long, 15' wide, 10' deep, possibly due to collapse over incline; third pit 30' in diameter, 20' deep, due to collapse over room. 16. Two subsidence troughs. One trough 25' long, 10' wide, 3' deep; second trough 45' long, 5' wide, 2' to 3' deep; both due to collapse over rooms. MINE OPENINGS 1. One vertical opening. Opening is over air shaft; 15' in diameter, 10' deep; nearly filled by soil, rock and trash; barbed wire fence around pit is in poor condition; less than 100' from county road. Access deterrence poor. 2. Three vertical openings. Opening over air shaft is 5' square and is 80' deep; barbed wire fence around opening in fair condition. Openings over two hoist shafts are 15'xl2'x3O' deep and 20'xl5'x25' deep; both shafts bridged by trash, earth and rock; barbed wire fence around openings in fair condition. Access deterrence fair. 3. One inclined opening. Opening of incline is 2.5' high, 4' wide and goes into hillside an unknown distance; mine roof partially collapsed; no access deterrent. 4. One vertical opening. Opening of air shaft is 3' by 4' and is about 30' deep; shaft is intact, no access deterrent. 5. One horizontal opening. Mouth of adit is 5' high, 10' wide, well supported by timbers; intact adit goes into hillIside more than 101 no access deterrent. 6. One vertical opening and-one inclined opening. Air shaft is 20' square at surface, 15' to 20' deep; partially collapsed and bridged. Incline is 13' square at surface and forms pit 15' to 20' deep; partially collapsed. Mayor of Williamsburg has thrown 55 gallon drums in pits to prevent access to underground workings. Access deterrence good. 7. One vertical opening. Opening is subsidence pit leading into mine incline. Opening at top of pit is 4' in diameters bbttom of pit is 8' wide; pit is 15' deep and has overhanging walls; no warning, no access deterrent. 8. One inclined opening. Opening of incline is 3.5' high, 5' wide; intact incline goes into hillside an unknown distance; no access deterrent. is J- -;'� UNITED STATES ,JO °pO DEPARTMENT OF THE INTERIOR F GEOLOGICAL SURVEY 38 °22'3 4247(11 620 JUL Tn T. 2( 1'7 i T. 20 T. 21 38a l IU, " Mapped. edited, and published by the Geological Survey 1 so Control by USGS and USC &GS q t Topography from aerial photographs by photogrammetric methods .�' Aerial photographs taken 1954. Field check 1959 Polyconic projection 1927 North American datum 10,000 Cot grid based on Colorado coordinate system, central and south zones 1000 meter Universal Transverse Mercator gild ticks, zone 13, shown in blue Dashed Idnd lines indicate approximate locations Certain land lines omitted in T 20 S, R. 70W because of insufficient data Fine red dashed lines indicate selected fence and field Imes ... ... CANON CITY IP O i III MI ROCKVALE QUADRANGLE PGA\ COLORADO 00E 1 7.5 MINUTE SERIES (TOPOGRAPHIC) !i 0" 1 °22'30" SCALE 1:24000 0 1 MILE 1000 0 1000 7000 3000 4000 5000 6000 7000 FEET 14' 1 .5 0 1 KILOMETER c CONTOUR INTERVAL 20 FEET 0 o i it w U 7 � o e � U F` APPROXIMATE MEAN .... nIPLIES WTIII NATIONAL MAC ACCURACY STANDARDS DECLINATION, 1959 FOR SALE BY U. S. GEOLOGICAL SURVEY, DENVER 25, COLORADO OR WASHINGTON 25, D.C. A FOLDER DESCRIBING TOPOGRAPHIC MAPS AND S] tABOLS IS AVAILABLE ON REQUEST COLORADO QUADRANGLE LOCATION Medium duty 488000m.E. - ROAD CLASSIFICATION Light -duty Unimproved dirt ____-_ N 000 FEET ITHI 000m. N. is. S. '15 105°07'30" 9 ROCKVALE,COLO. N3815- WI0507.5/7 5 1959 MINE DRAINAGE 1. Operators of G.E.C. strip mine have diverted Newlin Creek northward around mine area. In spring of 1980 stream broke through diversion channel and flowed into open pit. From there it flowed into rooms of Canon National mine which had been exposed by strip mining. After filling mine, water flowed out mouth of Corley N6 mine which is 0.6 miles north of Newlin Creek. Water then flowed down Second Alkalai Creek. By fall of 1980 the operators of G.E.C. strip mine had stopped flow into Second Alkalai Creek by plugging entry to Corley 86 mine. EXPLANATION MINES Coal - underground mine Coal - strip mine a Hoist shaft n Air shaft t Adit or incline u PROBLEM AREAS OMine subsidence Mine opening Mine fire OMine drainage NOTES I. At mines shown on this map .ere visited in the field and the actual or potential hazards associated with them sere evaluated at that time. These include mine opentiys, mine fires, and mine drainage. with - regard to subsidence it should be rated trait the nap shows only existing subsidence features rather than areas of potential subsidence. The latter can only be determined by site - specific studies. 2. The mine outlines shown on tnls map are based on original mine maps and surveys on file at the Lolorado Division of Mines and the Colorado state Archives and Records Office. There may be minor inaccuracies in the mine outlines either because of �naccurd:ies In the original surveys or because of small discrepancies generated during the transfer of the outline, from the large scale-original naps to the present smaller scale maps 3. A number of shafts and aoits are shova on the map as Isolated features which lack extenbuf- mining outlines. The Id<a of outlines is because, either there were no maps on file for the mines, or "cause the shafts and Adits were mere prospects wnose outlines are too small to ship. It the scale of the map. Areas +round these shafts had adlts should ore considered as possibly undermined. 4. The description of a particular prop) em area is based on conditions existing at the time of the field visit to that site. Canon City Coal Field CEIv JUL 2 7 1983 MINED LAND RECLAMA Colo, BEN. of Natural RR.cn AMUEDO AND IVEY Denver, Colorado MINE OPENINGS (cont.) 9. Vertical opening. Air shaft is 15' long, 10' wide, more than *EXTENT OF MINING MAP 50' deep; shaft intact and open; no access deterrent.' 10. Horizontal opening and collapse pit. Pit is 10' long, 7' wide, 15' DRAFTING: deep; formed by collapse into mine adit; mouth of adit itself is H.A.H. Schlender plugged; no access deterrent around pit. Second adit on upper SCALE: level has opening 8' wide, 5' high; goes into hillside at least DRAWING NO.; 25'; partially collapsed; no access deterrent. 11. Inclined opening. Mouth of incline is 4' high, 3' wide; opening 1 8007-14 goes into hillside an unknown distance; entry of incline partially collapsed; no access deterrent. 12. One inclined opening and one vertical opening. Air shaft is 35' in diameter; meets main incline at depth of 25'. Main incline has 000 FEET an opening 9' long, 4' wide; slopes underground an unknown distance. NTRAL) Both openings partially collapsed; neither has access deterrent. 13. Two horizontal openings. Openings originally 8' 12' wide; south opening partially obstructed by strip mine S. goes into hillside an undetermined distance; openings are ro exposed by strip mining; rooms intact; no access deterrent. 14. One vertical opening. Hoist shaft 4' square at surface, 50' deep; shaft intact and timbered; barbed wire fence around shaft lying on RS. ground. Os 15. One vertical opening. Opening is air shaft inside unlocked fan house. Shaft is 6' square and 30' deep, intact, concrete lined, has no access deterrent. Shaft has iron ladder to bottom. 16. One horizontal opening. Entry to adit is 5' high, 4' wide; adit goes into hillside an unknown distance; adit intact, no collapse; no access deterrent. 17. Horizontal opening. Entry to adit is 5' high, 4' wide; goes into hillside an unknown distance; adit intact, supported by timbers and concrete; no access deterrent. MINE FIRES 1. Coal waste bank on fire. Waste spread out in blanket -like form over an area of about two acres. Coal waste probably.averages 1' to 3' in thickness, may be as much as 10' thick in places. From 1970 to 1980 the waste bank has periodically caught fire. Ignition may have been caused by grass fires or by spontaneous combustion of finely comminuted coal. In the past, fires have burned over local areas of waste bank and have either been put out or have gone out naturally. In the fall of 1980 an area about 50' by 70' was burning. On several occasions during the past decade unwary children and pets have been burned while playing in the area. These accidents occur because the surface of the burning area appears to be normal and may even be cool to the touch; a few inches below the surface however temperatures are high enough to inflict severe burns. N 000 FEET ITHI 000m. N. is. S. '15 105°07'30" 9 ROCKVALE,COLO. N3815- WI0507.5/7 5 1959 MINE DRAINAGE 1. Operators of G.E.C. strip mine have diverted Newlin Creek northward around mine area. In spring of 1980 stream broke through diversion channel and flowed into open pit. From there it flowed into rooms of Canon National mine which had been exposed by strip mining. After filling mine, water flowed out mouth of Corley N6 mine which is 0.6 miles north of Newlin Creek. Water then flowed down Second Alkalai Creek. By fall of 1980 the operators of G.E.C. strip mine had stopped flow into Second Alkalai Creek by plugging entry to Corley 86 mine. EXPLANATION MINES Coal - underground mine Coal - strip mine a Hoist shaft n Air shaft t Adit or incline u PROBLEM AREAS OMine subsidence Mine opening Mine fire OMine drainage NOTES I. At mines shown on this map .ere visited in the field and the actual or potential hazards associated with them sere evaluated at that time. These include mine opentiys, mine fires, and mine drainage. with - regard to subsidence it should be rated trait the nap shows only existing subsidence features rather than areas of potential subsidence. The latter can only be determined by site - specific studies. 2. The mine outlines shown on tnls map are based on original mine maps and surveys on file at the Lolorado Division of Mines and the Colorado state Archives and Records Office. There may be minor inaccuracies in the mine outlines either because of �naccurd:ies In the original surveys or because of small discrepancies generated during the transfer of the outline, from the large scale-original naps to the present smaller scale maps 3. A number of shafts and aoits are shova on the map as Isolated features which lack extenbuf- mining outlines. The Id<a of outlines is because, either there were no maps on file for the mines, or "cause the shafts and Adits were mere prospects wnose outlines are too small to ship. It the scale of the map. Areas +round these shafts had adlts should ore considered as possibly undermined. 4. The description of a particular prop) em area is based on conditions existing at the time of the field visit to that site. Canon City Coal Field CEIv JUL 2 7 1983 MINED LAND RECLAMA Colo, BEN. of Natural RR.cn AMUEDO AND IVEY Denver, Colorado FOR: INACTIVE MINE RECLAMATION PROGRAM Colorado Department of Natural Resources *EXTENT OF MINING MAP Showing associated hazards and subsidence features ROCKVALE QUADRANGLE GEOLOGY: DRAFTING: R.E. Marbury , A.R. Myers H.A.H. Schlender DATE SCALE: ODNTOUR INTERVAL: DRAWING NO.; Jan. 31,1981 1:24,000 20' 1 8007-14 004625