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<br />E 30,000 E 40,000 E 50,000 E 60,000
<br />21 22 - 3 LEGEND
<br />0
<br />J/ 1 �
<br />24
<br />1 0 2 //
<br />23
<br />AG SURFACE WATER MONITORING STATION
<br />reek -, •1 SPRING
<br />ECSP -29 SPRING WITH POND
<br />N ECP-7 POND (STOCK POND OR RUNOFF POND)
<br />COAL REFUSE
<br />6 25 1 • ask 9 o 29 � /
<br />8 \ 27 GROUND WATER MONITORING WELL
<br />SP -22 Ei
<br />EC /i \
<br />• 25 /'° _ _ _ _ _ _ PERMIT BOUNDARY
<br />ECSP -17 EC -2 2 6
<br />/ ' ' SP-15 \ 9200
<br />COUNTY LINE
<br />r `�YIL rrrrrr r r r�ii rr r 0/y,� ,
<br />/ rr rrrr r rr rr rrrr r,�./ S O \ /
<br />/ I \ \ -- — PERENNIAL STREAM
<br />ECSPaa♦ j / i QQ Q \ _ eO°° --1 — - INTERMITTENT OR EPHEMERAL STREAM
<br />- - -- �l I -� - - - -- — - - - - -- - — - -- DITCH
<br />EC•5 � \ 8g °°
<br />STY'S SPRING E PRP EC -26 N / E O 0 0 RAILROAD
<br />ECPJ1 P32 ECSP37 j ' \ LAKE
<br />Tow ,+ i \ \ "- 8400 �,_
<br />820 ° PAVED ROAD
<br />o , 31 w 8000 3 _ __ 31 SECONDARY ROAD
<br />- - - -'
<br />ECP -7191 7 I f) \\ - - -' - -\ ----- - - - - -- 4WD ROAD
<br />a ♦ECSP• Pb \ T I V I `" 8000
<br />ECPJ6 �ECSP3 Pb ,\ qn'p- - - -- 3� 35 i 0o afc12 - - - - -- GEOLOGIC HAZARDS BOUNDARY AREA
<br />�c GEOLOGIC UNIT BOUNDARY
<br />PC 1,2 II ,i
<br />) I qTa \ \ i gafcl g1s1 °o WF EXPLANATION OF GEOLOGIC HAZARDS UNITS
<br />( )
<br />Is, (r H
<br />oo . OB 1s 1 -LANDSLIDE
<br />r _ i I yt � I v i
<br />■ ECP33 ` I _ Qls 1 ; \ \ is 2 (Relative age of landslides is indicated by subscripts [ 1 is the youngest ] )
<br />J r __ ECP4 T I -- — I t \
<br />,L —
<br />S i ' " ( _ / 8800 \l • is 3
<br />(Pu \ `:� O `��(�\ C ; P s da - DEBRIS AVALANCHE
<br />r QsPc 1 T w 8600 ` -- �'- \ i Q mf - MUDFLOW
<br />Pa 16
<br />P.4W see ,6 \II - - -- s4 - ob S 0 - - (r - - �' o rf - ROCKFALL
<br />_ 7\ mf r f / 840 SP� 2 ` O
<br />4 s2 _ ; Q �1,. 2 ! / ) '� qa c �sP� ( f 1 df1 - DEBRIS FAN
<br />' df 2 (Relative age of debris fans is indicated by subscripts [ 1 is the youngest
<br />Co ] )
<br />° / ; 8 200 \
<br />°o 5 0 I ° o sfc 1 - SLOPE FAILURE COMPLEX
<br />52.4 r - , ' j O 111 i IO r I� 1 I \ I \
<br />_ , I � , 8 000 `� `� I ° sfc 2 (Relative age of this unit is indicated by subscripts [ 1 is the youngest ] )
<br />^0) C 3
<br />rn sfc
<br />I °o us - UNSTABLE SLOPE
<br />T�,�,� � Q �, - ,- o pus - POTENTIALLY UNSTABLE SLOPE
<br />- 800 o�G 1 i _ ) 1 tr (f - Gt ( mf `
<br />_ I pfp PHYSIOGRAPHIC FLOODPLAIN
<br />sf - SHEET FLOW FLOODING AND EROSION
<br />ms - POTENTIAL MINE SUBSIDENCE
<br />11 r J P 0 o
<br />° _ s) v 1 I 1
<br />0 6 12 ) i t I
<br />e 1 _
<br />ph - POTENTIAL HYDROCOMPACTION
<br />r` O i -- r 1 i _
<br />- es - EXPANSIVE (SWELLING) SOIL OR ROCK
<br />No 0 ' , �` I ` ^ � / o - I � , r - 8 - s li
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<br />1, gal (P P �, rf .\ K 6
<br />_ r ( ) us
<br />-- - - - - aP ' ^� 600
<br />(P P r
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<br />/ 0 1 , /
<br />— . r I - I I 'o
<br />. /,' i ,' / df \ ° (pus), ' o I \ RECEO
<br />Qal Is / q
<br />(PPP) s) 1 .'� I v (u o
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<br />00 0 ` / , I � i \� � / / O t rtedamaCwn.
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<br />/ Minin9
<br />SCALE
<br />2000' 0 2000' 4009
<br />U z IN©
<br />Ui0
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<br />24 ° Q 1 °° CONTOUR INTERVAL 40 FT.
<br />2� o ° ®gQ / .
<br />Q . 2 Issued for RN -5 10129108 T.Leldlch JBever TLeldPoh
<br />I. \ I / 1 Update Springs and Ponds 12103 JNetNeton NGonzalez J.Nettleton
<br />90 R.
<br />0 Issued for PR -04 815100 JNetNeton JGetes JNetNeton
<br />REV. No REVISIONS DATE DESIGN BY DRAWN BY REVIEWED AND SIGNED By
<br />EXPLANATION OF GEOLOGIC MAP UNITS Glacial Deposits ,1`
<br />Tow - Ohio Creek Wasatch Formations (Eocene and Paleocene): Qal - Floodplain alluvium (Holocene): Mixtures of silt, sand, pebbles, and cobbles that QTa - High -level alluvium (Quaternary/Tertiary): Bouldery alluvial deposits that form Qdf1,2 - Debris -fan deposits (Holocene to late Pleistocene): Unsorted, unconsolidated Cow - Colluvial -wedge deposits (Holocene to late Pleistocene): Unconsolidated, R tv S
<br />Vari - colored (usually red, purple, green, yellow, and gray) mudstone and siltstone with have been recently deposited and/or reworked by fluvial processes. The alluvium planar, gently sloping surfaces high above modern streams. The location and debris of soil, rock, and displaced vegetation deposited where stream gradient heterogeneous soil material and rock fragments found new the base of a slope.
<br />interbedded medium-gray, lenticular sandstone and conglomeratic sandstone. The forms the physiographic floodplains of the modem drainage system and is a occurrence of the deposits (Tweto and others, 1976) suggest formation during decreases. This gradient decrease most commonly near the confluence of a Formed by gravity- dominated processes, the deposits rtnay be subject to Q B O w P.O. Box 535 '211
<br />generally . s obscured b y sur 9 g aggregate. the Tertiary or early Quaternary. These deposits are subject to sheet flooding tributary stream with a larger trunk stream. Usually composed of mud, sheet -, and continued mess- wasting.
<br />formation enerall is deposits, is one to mass -wasfin , and potential source of sand, ravel, and crushed -rock and erosion. debris -flow material, the deposits result from the rapid movement and deposition
<br />is potentially unstable. Qas -Slope -wash debris (Holocene to late Pleistocene): Generally fine - gained soil and of solid material during unusually heavy rein or snowmelt runoff. Qdf deposits Elk Creek Mine Somerset, CO. 81434
<br />KmV- Mesa Verde F ormat ions (late Creta ceous): rock detritus transported and deposited by running water that is not confined to COIluvialDeposits during previosglacilstaeHolocene; OdE3depositsmostlikelywere deposited
<br />d
<br />Brown, gray, and light gray to white sandstone interbedded with dark gray shale. channels. The deposits form a relatively thin veneer over older surficial deposits during previous glacial stages.
<br />i m p ortant coal beds occur in the lower art of the formation. The or bedrock, may include some wind -blown eolian material, and m be easily Ole -Landslide deposits (Holocene to Iota Pleistocene a heterogeneous assemblage PROJECT:
<br />Commercially P P y ( ) � y of unconsolidated soil and /or rock formed by slow to rapid downward and outward Oda - Debris- avalanche deposits (Holocene): Unsorted mixtures of soil and rock ELK CREEK MINE
<br />formation forms very steep slopes which are subject to rockfalls and other mass- eroded if protective vegetation is removed. mass movement in response to gravitational stress. These deposits, which include material formed by their generally sudden and rapid downslope movement and
<br />wasting processes. In many places these steep slopes are stable. earthflows, usually form an irregular, hummocky topography and may have an deposition. Usually formed during periods of rainfall, the deposits generally
<br />Km - ManDQS Shale (late Cretaceous): Orgy - Younger alluvial gravels (late Pleistocene): Poorly sorted, rounded to subrounded, associated main scarp. Relative age of the deposits is noted by subscripts (1 is produce a relatively small, elongate rise that may extend out to gently sloping DRAWING T I T L E
<br />unconsolidated pebbles and cobbles in a matrix of sand and silt. These gravels vary the youngest). Ole, deposits most likely were formed during the Holocene and CIS 2 areas below the steep slopes from which the materials originate.
<br />A dark brown to gray laminated silty shale which is prone to erosion and mass greatly in composition because of local source conditions and they cap the first and QIs3 deposits probably were formed during the Wisconsin glacial stage.
<br />wasting especially where mantled by thin colluvium. The shale locally contains well - defined terrace above modern streams. Sheet flooding, erosion, and local Qsfc 1,2,3 - Slope- failure - complex (unit) deposits (Holocene to late Pleistocene): REGIONA GEOLOGY /H YDROL O G Y
<br />swelling clays (montmorillonite) and water corrosive to concrete. Flash floods swelling soils are important geologic hazards associated with these gavels. Qmf - Mudflow deposits (Holocene): Clay and fine- grained debris that may include larger Unsorted mixtures of soil and rock material formed by various mass - westing
<br />and mudflows occur along drainages that traverse the Manoos Shale. rock fragments incorporated into the debris during downslope movement of the wet, processes including landslides, earthflows, mudflows, soil creep, and debris
<br />Qagm - Middle alluvial gravels (middle Pleistocene): Poorly sorted, rounded to subrounded, viscous mass of soil and rock material. The deposits have a youthful physiography avalanches. Not all of these processes occur within a specific deposit and the
<br />in a fine-grained matrix. These gravels have a better developed characterized by a gently undulating topography with an incised, braided drainage age of movement may vary with a particular area. The general age of the unit is
<br />poorly consolidated gravels
<br />soil profile and have a great amount of weathered These gravels
<br />then the lounge network. With decreasing viscosity during movement the deposits grade to fluvial noted by subscripts (1 is the youngest). Sheet 1 0f 1 Sheets
<br />sediments and with increasing viscosity grade to slow- moving earthfiows.
<br />alluvial gravels. Middle gravels include alluvial- fan and river- terrace materials, form nearly SCALE: DRAWING No
<br />planar surfaces situated at two or more levels, and are subject to sheet flooding and erosion. MWH
<br />As Shown 2.04 -M2
<br />
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