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( t A A <br /> , <br /> -- -- ; <br /> eC n, 26 P <br /> ct <br /> 7020 7020 <br /> 6990 6990 <br /> � <br /> 1{ �_-__ 6960 <br /> to W N LO <br /> '•'........._.- �. 1. •I I I , t '.', O O O O n n n N N <br /> /. , /+ Profile Impoundment PROFILE THROUGH EMBANKMENT CENTERLINE <br /> j PremmeTopography SCALE 1 =50 <br /> � OI <br /> iO <br /> 7020 <br /> 7020 <br /> 1 , <br /> 12" D50 Ripi M;� <br /> r <br /> SnStaNed.in SpillWva t l f ` 6990 6990 <br /> I <br /> 6960 <br /> , <br /> - 9 � 1 � ti 4� '• ' ' i 1 t 6960 <br /> 6930 ��� ___ - 6930 <br /> O M N 2 1 7 O M COD <br /> N N N M C7 C7 M <br /> PROFILE THROUGH IMPOUNDMENT <br /> i \!\\\t \ <br /> � A j <br /> __- - � EMBANKMENT DETAILS <br /> ~ 6991 /; Scale 1 - 20 <br /> 698 <br /> DOWNSTREAM UPSTREAM <br /> 1 � f <br /> �r <br /> EMBANKMENT CREST <br /> 6991.0 WALKWAY 42"HANORAALS AS SPECIFIED <br /> EMERGENCY SPILLWAY PRINCIPAL SPILLWAY WITH NCRS <br /> �+ 1!Jr �` EL.6986.0, (BOTTOM OF RIPRAP) ANTI VORTEX TRASH RACK EL.6984.0 <br /> 11 / r RISER IS 18"D1A. GALV STEEL CMP, 14 GAUGE MIN. <br /> 6 ! f s a -' DIA.PERFppRATIONS AS SPECIFIED <br /> EL 6982.0(LOWEST PERFOAAT/ON), 1.63AC-FT STORAGE <br /> g80 r <br /> V NORMAL POOL <br /> 1 <br /> , <br /> ! <br /> t 3 <br /> t I ! ONE YEAR SEDIMENT STORAGE <br /> - -0.25 AC-FT,ELEV.6974.4 <br /> POND BOTTOM <br /> , <br /> EL.6868.0 <br /> EL.6951.0ANTISEEP )) <br /> TWO REOUICRE ON 20 F7 OLLARS 6 FT OEN7ERS <br /> t t t I RIPRAP PROTECTION AND <br /> i 12"PARSHALL FLUME <br /> I AS SPECIFIED <br /> 8 „ r BY FIELD ENGINEER 8 F7 WIDE BOTTOM(MIN)KEYWAY 6 FT(MIN)IN DEPTH WITH 1 H:1V SIDES <br /> 1 EXTENDING ACROSS ENTIRE ABUTMENT <br /> 18"0 GALV STEEL CMP, 14 GAUGE MINIMUM,APPROX 200 F7 EXCLUDING BARREL <br /> if <br /> \ � { <br /> JAcceptable Fill Materials: <br /> J j //{ Suitable fill materials can be obtained from pond excavations or from nearby borrow sources. Suitable materials include native clay soils, clayey sand soils, and bedrock materials which are broken down to these soil types (SC, CC, CL and CH). Bedrock materials should be <br /> _ ! processed to produce a soil like material with maximum particle size of 6 inches. The materials used as embankment fill should have at least 25 percent fines (material finer than No. 200 sieve). The field engineer may approve the use of other materials following appropriate <br /> laboratory testing. <br /> y 1/ JJJ Unacceptable Fill Materials: <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 <br /> organic soils or materials containing construction debris are also not acceptable. Frozen soil Is not acceptable. <br /> Fill Placement and Compaction: <br /> Embankment fill should be placed 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 to at least 95 percent of standard proctor maximum dry density(ASTM D 696). The <br /> I <br /> placing and spreading of fill materials should be started at the lowest point of the embankment. Fill placement and compaction should be observed and tested by qualified geotechnical consultants. <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 /> J f to Exhibit 7, Item 20, Part F for Geotechnical Information and compaction specifications. Figure 3 of <br /> /Jtl that document contains requirements for site preparation, fill materials,placement requirements, and REC <br /> /! monitoring. <br /> 3. Spillway and outlet section along groin shall be riprapped with 12 inch D50 size material. v <br /> [),visionni g�edalety , <br /> 1 &jafety <br /> ENGINEERS CERTIFICATION <br /> AREA-CAPACITY TABLE 1, LEE E. SAMPSON, hereby certify that this <br /> \ - map has been reviewed by me and is true <br /> (To be revised following as built survey) <br /> J f and correct to the best of my knowledge and TR-118 <br /> AVG. CAPACITY STAGE information, relying on information supplied <br /> Y 9Approved 4/2/18 <br /> } ELEV. AREA AREA INTERVAL INCREMENTAL CUMULATIVE INTERVAL Company or u g <br /> I p y qualified consultants working <br /> (ft) (aC) (ac) (ft) (ac-ft) (ac-ft) (ft) for Colowyo Coal Company, and that I am a <br /> Professional Engineer licensed in Colorado as <br /> \ 6968.00 0.0000 required by the provisions of C.R.S. <br /> 12-25-101 through C.R.S. 12-25-119. IN SECTION 26 POND <br /> N 6971.00 0.0325 0.0163 3.00 0.0517 0.0517 3.00 WITNESS WHEREOF, I have hereunder set DESIGN DRAWING <br /> y hand and affixed my seal, <br /> \� / 6974.00 0.0778 0.0551 3.00 0.1610 0.2126 6.00 <br /> 6977.00 0.1416 0.1097 3.00 0.3246 0.5372 9.00 ,,`�p1I111I/11��, --. SCALP As Noted <br /> ( \ I i f ♦ �I 1f DATE: 1 11-18 <br /> } 6980.00 0.2243 0.1830 3.00 0.5443 1.0815 12.00 ♦♦�O`��P�0,L 0 ���i�i V DAWG.ee I Fs <br /> It l�, • 1. - J, t I ( /• W E ♦ • ,'S i - COAL APPROVED BY., <br /> ( 6983.00 0.3267 0.2755 3.00 0.8215 1.9031 15.00 " . s ! COMPANY DRWG NO. <br /> (. i 1 \ 6984.00 0.3673 0.3470 1.00 0.3470 2.2500 16.00 47031 _ OFL[,PR000C„w Exh. 7 Item 23 <br /> 6986.00 0.4485 0.3876 2.00 0.8104 3.0605 18.00 : Q�2-/$ ? S `State l Mine y <br /> 5]31StateHlghwayl3 Figure C6 <br /> min �•��. �r� �� Meeker,Coloretlo81841 <br /> } \ I S TOTAL CAPACITY 3.06 ACRE-FEET (DESIGN) ONAL�E`'��o°�� <br /> No. REVISION DATE BY CHK <br /> Section 26 Pond Plan View TR418 Modified Pond Design ln9/18 LES JG <br /> Scale 1" - 251 TR-118 Revised Emergency Spillway Elevation 2112118 LES JG <br /> Page Exh. 7-23C-11 <br />