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PROFILE THROUGH EMBANKMENT CENTERLINE <br /> 7170 SCALE 1" =50' 7170 <br /> 7140 7140 <br /> Profile Impoundment _ . <br /> Premine Topography �. . 7110 <br /> 7110 <br /> 7aso 7080 <br /> O Cl) � N to Co <br /> + + + + + + + + <br /> O O O O r r r N N N co <br /> .............. B <br /> 7)70 <br /> 7170 <br /> 1 7140 <br /> 714a <br /> �-- 7110 <br /> 7110 <br /> .-- <br /> 7080 <br /> ",..., <br /> 7080 <br /> O O O O O O � o � Q c`� c�D rn N + <br /> + + + + + + + + + + + + + + + + <br /> N N <br /> Aj` {}, <br /> PROFILE THROUGH IMPOUNDMENT <br /> ° d SCALE 1" =50' <br /> \\.\N <br /> y fi <br /> f f <br /> -- - EMBANKMENT DETAILS <br /> 4 <br /> Scale )" = 20' <br /> `.. Riprap installed in <br /> spillway and groin <br /> 175 cu.yds. 15.rr <br /> }... 7��© DOWNSTREAM <br /> r <br /> EMBANKMENT CREST <br /> . UPSTREAM <br /> 7130.0 <br /> EMERGENCY SPILLWAY WALKWAY W 4Z HANDRAILS AS SPECIFIED <br /> - ---- EL.7125.0,(TOP OF RIPRAP) <br /> FP <br /> t25 <br /> 713!! 0. 5 PRINCIPAL SPILLWAY W1TH NCRS ANTI-VORTEX TRASH RACK <br /> „, EL.7118.0,RISER IS 18"DIA.GALV.STEEL CMP, 14 GAUGE MIN. <br /> 7130 T 1 3 0 NORMAL POOL <br /> -� TWO 3"DIA.PERFORATIONS AT EL.7116.0 <br /> .�� 4'°, `'. � �,--ONE YEAR SEDIMENT ACCUMULATt DN,EL.7112.47 <br /> r <br /> EL.7104.0 24" VALVE,WATE MAN -20 SLIDING GATE VAL EL.INVERT 7107.0 <br /> t <br /> R C <br /> GROUND <br /> POND BOTTOM <br /> RIPRAP PROTECTION AND <br /> ORIG. R <br /> EL.7106.41 EL.7105.0 <br /> 12"PARSHALL FLUME AS SPECIFIED <br /> ANTISEEP COLLARS 6 FT MIN) <br /> 8Y FIELD ENGINEER FOUR REQUIRED ON 20 F CENTERS <br /> 8 FT WIDE(MIN)KEYWAY 6 FT(MIN)IN DEPTH WITH 1 H:IV SIDES <br /> EXTENDING ACROSS ENTIRE ABUTMENT <br /> EXCLUDING BARREL <br /> �`C� / X HELICALLY CORRUGATE POLYMER COATED <br /> :t 24"a GALV STEEL CMP, 14 GAUGE MINIMUM,APPROX 160 <br /> j A WRAPPED FILTER,TRANSPORT AND PLACE 2-2 3" 1/2"HELL D, <br /> � � FABRIC <br /> OF CLEAN,OPEN-GRADED GRAVEL(MINUS 2 INCH)APPROX 8 AT 1.3/°SLOPE <br /> 150 CUBIC YARDS L ° <br /> TO 91NCHES THICK,46 FEET IN LENGTH&EXTENDING ACROSS THE ENTIRE FOOTPRINT <br /> OF THE LOWER ONE-THIRD OF DOWNSTREAM TOE AS DIRECTED. FILTER FABRIC <br /> SHALL BE MIRAF1140N 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 /> r <br /> Site Preparation: <br /> Prior to placing fill,the area should be stripped of organic topsoil or other deleterious materials. <br /> f Acceptable Fill Materials: <br /> Suitable fill materials can be obtained from pond excavations or from nearby borrow sour <br /> ces. Suitable materials include native clay soils,clayey sand soils,and bedrock materials which are broken dawn to these soil types(SC,CC,CL and CH). Bedrock materials should be processed to <br /> t` <br /> at least 25 percent fines(material finer than No.200 sieve). The field engineer may approve the use of other materials following appropriate laboratory testing <br /> produce a sail Like material with maximum particle size of fi inches. The materials used as embankment fill should have . <br /> r <br /> (� f <br /> Unacceptable Fill Materials. <br /> t <br /> Materials not considered suitable for use as embankment fill include cleaner sand and gravel. Also unacceptable are highly carbonaceous materials obtained from bedrock excavations or well-cemented sandstones which do not break down to soil like material. Highly organic soils or materials - <br /> #t � containing construction debris are also not acceptable. Frozen soil is not acceptable. <br /> 4Fill Placement and Compaction: <br /> fill should be laced in thin horizontal Lifts(8 to 12 inches loose thickness). The fill should be moisture conditioned to within 2 percent of optimum moisture content and compacted fo at feast 95 percent of standard proctor maximum dry density(ASTM D 698). The placing and <br /> Embankment fil p <br /> 'Section <br /> ed at the lowest Dint of the embankment.Fill placement and compaction should be observed and tested by qualified geotechnical engineering firm. <br /> 9 spreading of fri!materials should be start p <br /> t <br /> Monitoring and Inspections: <br /> Monitoring and inspections should be performed by qualified individuals as outlined in Colorado DRMS regulations. <br /> Construction Notes: <br /> 1. See Map 41 B for general location and associated drainage areas. <br /> 2. Embankment to be constructed of compacted fill using materials specifed by field engineer. Refer to <br /> to Exhibit 7, Item 20, Part F for Geotechnical Information and compaction specifications. Figure 3 of <br /> s an <br /> d <br /> ireme nt <br /> plac <br /> ement re u , <br /> that document contains requirements for site preparation, fill materials,p q <br /> monitoring. <br /> .� 3. Hatched area of the spillway and outlet section along groin shall be riprapped with 12 inch median RIFCCIL,Co <br /> size material. <br /> d 4. Upon obtaining acceptable laboratory results on borrow material samples, the fabric wrapped drain shown AW <br /> � f above may be modified or deleted at the discretion of the design engineer. 01 <br /> / l �,-f-----° �� Division eat ��t��e <br /> �� � TABLE �11171C3��' sa^fet�/tlQn, <br /> ARLPI-CAPAClT Y <br /> (Revised following as-built survey) <br /> CAPACITY <br /> N <br /> ELEVATION AREA AVERAGE AREA <br /> INCREMENTAL CUMULATIVE T1 F1 CAT10N <br /> (Acre-Feet) (Acre-Feet) ENGINEER'S CER <br /> (Feet) (Acres) (Acres) <br /> I THOMAS C. PETERSON, being a W E <br /> 7105.0 0.03 0.00 Licensed Professional Engineer in PR-4 <br /> 0.04 0.04 the State of Colorado, do hereby <br /> 7106.0 0.04 0.04 certifythat this map has been Approved on 818116 <br /> 0.06 0.11 <br /> reviewed by me and is true and <br /> 7108.0 0.07 0.15 <br /> correct to the best of my knowledge <br /> 0.09 0.1$ <br /> and information relying on work <br /> 7110.0 0.1 0.33 <br /> performed by others, and based on <br /> 0.13 0.25 information supplied by experts <br /> 7112.0 0.15 0.58 identified in section 203.3 of the <br /> . 0.17 0.34 Colowyo Coal Company L.P. Permit.. <br /> SECTION 36 POND <br /> f ` 7114.0 0.20 D.92 <br /> DESIGN DRAWING <br /> { ,. 0.21 0.21 <br /> f., 7115.0 0.22 1.13 <br /> 0.24 0.24 SCALE: As Noted <br /> .- 1.37 � o <br /> 7116.D D.25 .•�N.a��. GATE; 1 J19J2015 <br /> 5 C• per % tP W1. V DRWG.BY: TC;P <br /> 1.95 �' <br /> , 0.29 0.57 � � :p� �4''J,� �O � ` COAL APPROVED BY: <br /> 7118.0 0.32 <br /> � z� � ti9F COMPANY �.�, DRWG NO. <br /> 0.36 0.72 32257 <br /> 7120.0 0.4D % /� L <br /> 2.67 i � •� 7!3���7 6 Cr,� ` E Y P�O�t�*-rxonocr�o�-�N t�. <br /> Exh: 7, Item 23 <br /> 0.44 0.88 W O''N 0a .n� \� Colowyo Mine <br /> S •�...n• ��� ``�� 57(Is State Highway Figure C7 <br /> 7122.0 0.48 3.55 Meeker,Colorado 816A1 <br /> SON L ���` <br /> Q 0.53 1.07 � i <br /> /'�► <br /> 7124.0 0.5$ 4.61 No. REVISION DATE BY HK <br /> 0.61 0.61 THOMAS C PETERSON <br /> J 7125.0 0.64 5.23 P.E. No. 32257 New Drawing 1/20/15 rCP KRB <br /> - - odified• teriar dam�Io a face to 3H:1 add d Riser <br /> PR-04 � <br /> 7/,3s'��5orrectea ore_gar in barrow,revrsed'tlarreel diameter 7/31/15 TCP KRB <br /> SECTION <br /> PLAN VIEW TOTAL CAPACITY 5.23 ACRE-FEET(DESIGN) DATE <br /> Scale 1" = 50' Page Exh. 7-23C-12 <br />