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LI I ILL UL)LLUIVI PL)/V'U - PLAN VIL W N <br />Scale 1 " = 50' W E <br />S <br />AW, <br />6650 <br />6640 <br />6630 <br />6620 <br />6610 <br />6600 <br />0 +00 1 +00 2 +00 3 +00 4 +00 5 +00 6 +00 7 +00 8 +00 9 +00 <br />HOR III= 1001 <br />INERT 111=501 <br />• ltJ <br />6660 <br />6660 <br />6640 <br />6620 <br />6600 <br />6700 <br />A <br />6680 <br />6660 <br />6640 <br />6620 <br />6600 <br />0 +00 1 +00 2+00 3 +00 4 +00 5 +00 6 +00 7 +00 <br />EMBANKMENT CREST <br />6650 <br />6640 <br />6630 <br />6620 <br />6610 <br />6600 <br />11 +00 <br />1Sa <br />EL.6649.0 <br />AVERAGEAREA <br />(Acres) <br />CAPACITY <br />EMERGENCY SPILLWAY <br />CUMULATIVE <br />4 <br />EL 6642.0 <br />1 <br />(Acre -Feet) <br />WALKWAY 42" HANDRAILS AS SPECIFIED <br />PRINCIPAL WAY W1 ANTI -VORTEX TRASH RACK <br />6621 <br />0.13 <br />AND 30'' <br />�LL 6647.0 AND 30" RISER HAHREL <br />RISER BARREL <br />RIPRAP PROTECHONAND INSTALL & PLACE <br />Ia" PARSHALL FLUME <br />''.. <br />t� <br />3 <br />PERFORATIONS PER ELEVATION AS SPECIFIED <br />AS SPECIFIED <br />BYFIEL0 ENGINEER 2 <br />0.142 <br />SEE TABLE BELOW <br />5731 State Highway 13 <br />Meeker, Colorado 81641 <br />6625 <br />ta' WATERMAN C-20 SLIDING GATE VALVE, EL. INVERT6626. 10 <br />0.570 <br />v NORMAL POOL <br />REVISION <br />DATE <br />EL 6630.0 <br />/ L 78" 0 GALV STEEL CMP, 14 GAUGE MINIMUM, <br />2 -2/3" X 112" HELICALLY CORRUGATED, POLYMER COATED <br />AT2.0% SLOPE <br />FABRIC WRAPPED FILTER, TRANSPORT AND PLACE. <br />-120 CUBIC YARDS OF CLEAN, OPEN GRADED GRAVEL (MINUS 2 INCH) APPROX. 1.0 <br />TO 1.2 FEET THICK, 60 FEET IN LENGTH & EXTENDING ACROSS THE ENTIRE FOOTPRINT <br />OF THE LOWER ONE -THIRD OF DOWNSTREAM TOE BELOW ELEV. 746a FILTER FABRIC <br />SHALL BE MIRAR 14ON NON WOVEN OR EQUIVALENT, AND SHALL COMPLETELY <br />SURROUND THE GRAVEL IN ALL DIMENSIONS. ALL FABRIC EDGES SHALL BE PROVIDED <br />WITH 3 FEET OF OVERLAP WITH ADJACENT EDGE. <br />Site Pmparafion: <br />Pnorto placing fill, the area should be sbipped of organic topsdl or other deleterious materials <br />ANTISEEP COLLARS 6 FT (MIN) O G GROUND POND BOTTOM <br />FIVE REQUIRED ON 20 FT CENTERS EL. 6623.0 <br />8 FT WIDE (MIN) KEYWAY6 ET (MIN) IN DEPTH WITH ILL TV SIDES <br />EXTENDING ACROSS ENTIRE ABUTMENT <br />EMBANKMENT DETAILS <br />Scale 1" = 20' <br />Acceptable Fill Materials' <br />Suitable Allmatenals can be obtained from paid excavations orfmm nearby sormwsouroes Suitable matenals include native clayscils, dayeysand soils, <br />and bedrock materials which are broken down to these soil types (SC, CC, CL and CH). Bedrocknishmels should be processed to produce a soil like <br />mafenal with maximum particle size of inches The materials used as embankment All should have at least25 percenttinas (material Anerthan No. 200 stem). <br />The field engineamay approm iris use ofothermatenals following appmpnate labomtorytesting. <br />Unacceptable FN Materials <br />Matenalsnot cnnslderod suitable foruse as embankment All include deanersand and gmveL Also unacceptable are highly carbonaceous materials <br />obtained from bedrock excavations or well- cemented sandstones which do not breakdown to scillike material. Hfghlya ganic soils ormatenals contarntng <br />constmctfon debns am also notacceptabie. Frozen sotlfs not acceptable. <br />Fitt Placement and Compaction: <br />Embankment All should be placedin thin Armizontaitifts (8 to f2 inches loose thickness). The Alt should be mdsture conditioned to within 2 percent o£ optimum <br />moisture content and compacted to atleast 95peroent of standaMpmctormaxfmum dry density (AS7MD 698). The placing and spreading ofAll materials should <br />be staned at the lowest paint of the embankment. Fitt placement and compaction should be observed and tested by qualfgedgeotechnicel engtneenng )7rm. <br />Monitoring and Inspections' <br />Montaing and inspections should be performed by qualiffed indloduals as outlined in Colorado DRMS regulators <br />Construction Notes: <br />1. The field engineer shall adjust the dimensions and elevations in the field to ensure that the total capacity is less <br />acre -feet and the embankment height is less that 20.0 feet per MSHA procedures. <br />2. Hatched area of the spillway and outlet section shall be nprapped with 18 inch median <br />size material. <br />AREA - CAPACITY TABLE <br />(Revised following as -built survey) <br />ELEVATION <br />(Feet) <br />AREA <br />(Acres) <br />AVERAGEAREA <br />(Acres) <br />CAPACITY <br />INCREMENTAL <br />CUMULATIVE <br />4 <br />6631 <br />1 <br />(Acre -Feet) <br />(Acre -Feet) <br />6621 <br />0.13 <br />6639 <br />0 <br />0 <br />*3 <br />Colowyo Coal Company <br />0.142 <br />Owe <br />0 <br />5731 State Highway 13 <br />Meeker, Colorado 81641 <br />6625 <br />0.16 <br />0.570 <br />0.570 <br />REVISION <br />DATE <br />0.403 <br />HK <br />6630 <br />0.65 <br />TCP <br />2.013 <br />2,582 <br />0.927 <br />TAT <br />6635 <br />1.21 <br />4.633 <br />7.215 <br />1.605 <br />6640 <br />2.00 <br />8.026 <br />15.241 <br />2.305 <br />6642 <br />2.61 <br />4.611 <br />19.852 <br />TOTAL CAPACITY 19.85 ACRE -FEET (DESIGN) <br />PERFORAT IONS <br />Elevation of <br />Perforations (ft) <br />Diameter of <br />Perforations (in) <br />Number of <br />Perforations per <br />Elevation <br />6630 <br />1 <br />4 <br />6631 <br />1 <br />4 <br />6638 <br />2 <br />4 <br />6639 <br />2 <br />4 <br />ENGINEERS CERTIFICATION <br />1, THOMAS C. PETERSON, being a <br />Licensed Professional Engineer in <br />the State of Colorado, do hereby <br />certify that this map has been <br />reviewed by me and that it accurately <br />represents the as -built condition of the <br />impoundment following construction. <br />I% ` P 0 L l cF!�i�G <br />o 2 Pe <br />U �o FPo�O <br />' 32257 <br />33/Z Q / /c,. 4� <br />-:f&- S /ONAL •E�GO`p <br />P.E. No. 32257 <br />- A ETE 1Z <br />FLOATING SIPHON SPECIFICATIONS: <br />Crest Elevation= 6632' <br />Inlet Elevation= 6630' <br />Outlet Elevation= 6625' <br />Siphon Diameter= 4 IN <br />Length= 25' <br />Manning's n= 0.024 <br />O. <br />G <br />o n 3 <br />5, <br />o s'o <br />a cc <br />G- CL r <br />i'oflR 2 <br />jivision of F <br />Mining Sri <br />LITTLE COLLOM POND <br />DESIGN DRAWING <br />I - <br />SCALE: As Noted <br />O <br />DATE., 3/23/2010 <br />DRWG. BY.. TCP <br />*3 <br />Colowyo Coal Company <br />APPROVED BY <br />Owe <br />0 <br />5731 State Highway 13 <br />Meeker, Colorado 81641 <br />DRWG NO. <br />Exh. 7, Item 26 <br />p <br />Figure 1 <br />No. <br />REVISION <br />DATE <br />BY <br />HK <br />TCP <br />TAT <br />TCP <br />TAT <br />