2013-04-05_PERMIT FILE - C1981019A (10)

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i i i f � I i I / TPP3 TPP2 7452.0 7 54.75 7 ' n s / Y GdS� tit *C 7`4yttA)JAau,y NSyt'J �- ig N ® h411'(W tY YIbJY Wli TnC�+aY.YPY,L. ]9] fyr Yt't h T4 YY'4 ^.i? �� Y g.. _ .3 A). i a !tab I 81-3 81. 70 .2 B2 W..9 LZ 7 ]2 c e 71.. 0 83.8 ) o i Bda / 856 � 87 F' WEST TAYLOR POND - PLAN VIEW N Scale 1' = 50' W E S PROFILE THROUGH EMBANKMENT CENTERLINE _ SCALE 1" =50' 7530 7530 ' I 7500 7500 I 7470 7470 � I i i 7440 7440 g co (o 0) N °o 00 o 0 N N PROFILE THROUGH IMPOUNDMENT F' 7500 SCALE 1" =50' 7500 I I 7470 7470 7440 7440 O + 0+ ro + m + + + + + + + + O O O O o] N h co + 0) ro O O + + + + + + + + + N N N 07 CO rJ co V V 'c} h b Yn O EMBANKMENT DETAILS Scale 1" = 20' EARTHWORK QUANTITIES (APPROX. EXCLUDING KEYWAY) L CUT. 2,100 CU YD. 1s a FILL: 5,500 CU YD RIPRAP PROTECTION AND 9" PARSHALL FLUME AS SPECIFIED BY FIELD ENGINEER / L 18" O GALV STEEL CMP, 14 GAUGE MINIMUM, 2 -213" X 112" HELICALLY CORRUGATED, POLYMER COATED AT20% SLOPE FABRIC WRAPPED FILTER, TRANSPORTAND PLACE. -120 CUBIC YARDS OF CLEAN, OPEN GRADED GRAVEL (MINUS 2 INCH) APPROX 1.0 TO 1.2 FEET THICK, 60 FEET IN LENGTH & EXTENDING ACROSS THE ENTIRE FOOTPRINT OF THE LOWER ONE THIRD OF DOWNSTREAM TOE BELOW ELEV .7468 FILTERFABRIC SHALL BE MIRAH 14ON NON WOVEN OR EQUIVALENT, AND SHALL COMPLETELY SURROUND THE GRAVEL IN ALL DIMENSIONS. ALL FABRIC EDGES SHALL BE PROVIDED WITH 3 FEET OF OVERLAP WITH ADJACENT EDGE. Site Propervion. Prior to placing A /1, the area should be stripped of organic topsa/ or other deleterious materials. Acceptable FillMatenals' Suitable fiilmaterrals can be obtawedkom pond excavations orfmm nearbysonawsources Surtabble materials include nafive day sails, clayey send soils, andbodmckmatedals which are broken down to these sal types (SC, CC, CL and CH). Bedmckmaferrals should be Processed to produce a soiliike material with maximum particle size of 6 inches The matanais usecd as eirbankmem'911 should have at /east 25percentfines ( materral finer than No 200 sieve). The field engmeermayapprove the use ofothermaterfals following appr priate laboratory testing. Unacceptable Fill Matenals.' Mateda /s not consideredsurtable foruse as embanfanentAlmdude deanersandandgmva/- Also emacceptab/e are high /ycarbonaceous matena /s obtarnedham bedmdr excavations or welkeementedsandsfonss which do notbreak down to soi /Gke material. Hrghry organic sci /s or matena /s containing construction debris are also not acceptable. Frozen soiiis not acceptable, Fill Placement and Compaction Embankment Al/shouldbe placed in thin honzontallifts (8 to 12mches loose thickness). The m1 shou /d be morstum conditioned to within 2 percent ofoptmum moisture content and compacted to atleast 95percent of standard proctormaxrmum dry density (ASTMD 698). The placing and spreading oftillAmIdde /s should be started at the lowest point of the embankment. Fillplacement and cmpadion shouldbe observed and iestedby qua /ifredgeotechnical engineering firm. Monitoring and inspecfions. Monitoring and inspections should be performed by qualrfred individua /s as outmed in Colorado DRMSregulations. Construction Notes: 1. Premining Topography has been supplemented with one foot contour data based field surve data collected by Epp & Associates durinq the Fall of 2006 using GPS methods. Final as -blur survey data was collected October 18, 2007 by Epp & Associates. 2. See Map 41A for general location and associated drainage areas. MOM 3. Embankment to be constructed of compacted fill using materials specified by field engineer. Refer to P to Exhibit 7, Item 20, Part F for Geotechnical Information and compaction specifications. Figure 3 of JUL 3 0 2012 that document contains requirements for site preparation, fill materials, placement requirerments, and monitoring. Uivi®lep of rwdamaWn, 4. Hatched area of the spillway and outlet section along groin shall be riprapped with 18 inch, median mining and ft size material. ENGINEERS CERTIFICATION AREACAPACITY TABLE 1, THOMAS C. PETERSON. being a C 14 e (Revised following as -built survey) Yn A � •� ELEVATION (Feet) EMBANKMENT CREST AVERAGEAREA (Acres) CAPACITY EL. 7481.0 EMERGENCY SPILLWAY WALKWAY 42" HANDRAILS AS SPECIFIED EL 7475.8 (Acre -Feet) (Acre -Feet) PRINCIPAL SPILLWAYWITH NCRS ANTI- VORTEX TRASH RACK 0.0222 EL. 7471.0 0 TWO 3" DIA PERFORATIONS PER ELEVATION AS SPECIFIED 0.0605 1 EL. 7468.0 (LOWEST PERFORATION) 7460 2 0.30 '7 NORMAL POOL a1590 EL. 7468.0 7465 18" WATERMAN C-20 SLIDING GATEVALVE, EL. IWERT7459.0 ONE YEAR SEDIMENTACCUMULATION, EL. 7459.39 ��- POND BOTTOM GROUND EL. 7455.0 0.3066 ANTISEEP COLLARS 6 FT (MIN) . EL. 7456.0 7470 FOUR REQUIRED ON 20 FT CENTERS 8 FT WIDE (MIN) KEYWAY6 FT (MIN) IN DEPTH WI77-11 H.- 1V SIDES 2.63 EXTENDING ACROSS ENTIRE ABUTMENT Site Propervion. Prior to placing A /1, the area should be stripped of organic topsa/ or other deleterious materials. Acceptable FillMatenals' Suitable fiilmaterrals can be obtawedkom pond excavations orfmm nearbysonawsources Surtabble materials include nafive day sails, clayey send soils, andbodmckmatedals which are broken down to these sal types (SC, CC, CL and CH). Bedmckmaferrals should be Processed to produce a soiliike material with maximum particle size of 6 inches The matanais usecd as eirbankmem'911 should have at /east 25percentfines ( materral finer than No 200 sieve). The field engmeermayapprove the use ofothermaterfals following appr priate laboratory testing. Unacceptable Fill Matenals.' Mateda /s not consideredsurtable foruse as embanfanentAlmdude deanersandandgmva/- Also emacceptab/e are high /ycarbonaceous matena /s obtarnedham bedmdr excavations or welkeementedsandsfonss which do notbreak down to soi /Gke material. Hrghry organic sci /s or matena /s containing construction debris are also not acceptable. Frozen soiiis not acceptable, Fill Placement and Compaction Embankment Al/shouldbe placed in thin honzontallifts (8 to 12mches loose thickness). The m1 shou /d be morstum conditioned to within 2 percent ofoptmum moisture content and compacted to atleast 95percent of standard proctormaxrmum dry density (ASTMD 698). The placing and spreading oftillAmIdde /s should be started at the lowest point of the embankment. Fillplacement and cmpadion shouldbe observed and iestedby qua /ifredgeotechnical engineering firm. Monitoring and inspecfions. Monitoring and inspections should be performed by qualrfred individua /s as outmed in Colorado DRMSregulations. Construction Notes: 1. Premining Topography has been supplemented with one foot contour data based field surve data collected by Epp & Associates durinq the Fall of 2006 using GPS methods. Final as -blur survey data was collected October 18, 2007 by Epp & Associates. 2. See Map 41A for general location and associated drainage areas. MOM 3. Embankment to be constructed of compacted fill using materials specified by field engineer. Refer to P to Exhibit 7, Item 20, Part F for Geotechnical Information and compaction specifications. Figure 3 of JUL 3 0 2012 that document contains requirements for site preparation, fill materials, placement requirerments, and monitoring. Uivi®lep of rwdamaWn, 4. Hatched area of the spillway and outlet section along groin shall be riprapped with 18 inch, median mining and ft size material. ENGINEERS CERTIFICATION AREACAPACITY TABLE 1, THOMAS C. PETERSON. being a C 14 e (Revised following as -built survey) Yn A � •� ELEVATION (Feet) AREA (Acres) AVERAGEAREA (Acres) CAPACITY INCREMENTAL CUMULATIVE (Acre -Feet) (Acre -Feet) 7455 0.0222 0 0.0605 a30 7460 0.0989 0.30 a1590 0.80 7465 0.2191 1.10 0.3066 1.53 7470 0.3941 2.63 0.4814 2.41 7475 a5687 5.04 0.5987 0.48 7476 0.6287 5.52 TOTAL CAPACITY 5.52 ACRE -FEET (AS BUILT) TOTAL CAPACITY 5.64 ACRE -FEET DESIGN Licensed Professional Engineer in the State of Colorado, do hereby certify that this map has been reviewed by me and that it accurately represents the as -built condition of the impoundment following construction. 0 L CF ,i,ttWi p5 c•PfrFT'�` C) r " 32257 ' -o n1>�i THOMAS C PETERSON P.E. No. 3P57 L Page Exh. 7 -20C -4