Laserfiche WebLink
7240 7240 <br /> vf. 7 <br /> 72307230 <br /> ? ti <br /> S � P <br /> b 6 <br /> ko <br /> koo <br /> 0 k <br /> S e <br /> s <br /> 7220 <br /> 7220 <br /> 7210 <br /> 7210 <br /> Waterline to 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 4+00 4+50 5+00 <br /> Water Horse <br /> f <br /> " ` y CROSS-SECTION THROUGH IMPOUNDMENT Impoundment <br /> HORIZONTAL SCALE 1" =50' Premine Topography <br /> ..m <br /> VERTICAL SCALE 1" =10' High Water Line <br /> 1230 <br /> 122� <br /> �2i8.. <br /> Riprap installed <br /> 12j4 minus 12", <br /> ?22Q 15.0 cu.yds. <br /> 12�2 7250 7250 <br /> 121 <br /> .4 yF <br /> .� <br /> 72407240 <br /> , <br /> 00 <br /> N <br /> 4 7230 7230 <br /> .- -w........_.. <br /> 7220 <br /> 7210 17210 <br /> 0+00 0+50 1+00 1+50 2+00 2+50 3+00 3+50 <br /> Impoundment <br /> CROSS-SECTION THROUGH IMPOUNDMENT Premine Topography <br /> HORIZONTAL SCALE 1" =50' <br /> � VERTICAL SCALE 1" =10' <br /> High Water Line ,N <br /> �0 1212 <br /> 12 Site Preparation: <br /> 12�4 12�6 Prior to placing fill,the area should be stripped of organic topsoil or other deleterious materials. <br /> 12�5 Acceptable Fill Materials: <br /> 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 e <br /> ..F. 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 types(SC, CC, CL and CH). Bedrock materials should t e <br /> ?22� '.,� � laboratory testing. <br /> p ( a No.200 sieve). The field engineer may approve the use of other materials following appropriate <br /> 2304, Unacceptable Fill Materials: <br /> 1 <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 <br /> materials containing construction debris are also not acceptable. Frozen soil is not acceptable. <br /> 12 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 698). The <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 engineering firm. ) <br /> Monitoring and Inspections: <br /> Monitoring and inspections should be performed by qualified individuals as outlined in Colorado DRMS regulations 4.05.6 and 4.05.9. <br /> �s Construction Notes: <br /> 1. See Exh. 7-23 Figure J1 for general location and associated drainage areas. <br /> 2. Hatched area below the spillway outlet shall be riprapped with 12 inch median size material_ <br /> t/i® y Y <br /> J DIVisioF1 Fat 1 1(fla o 1 <br /> Area - Capacity Table N Ainino&safety <br /> ELEVATION AREA AVERAGE AREA CAPACITY ENGINEER'S CERTIFICATION <br /> (Feet) (Acres) (Acres) INCREMENTAL CUMULATIVE <br /> (Acre-Feet) (Acre-Feet) I, THOMAS C. PETERSON, being a <br /> 7210.0 0.81 Licensed Professional Engineer in <br /> 0.0 the State of Colorado, do hereby <br /> 7211.0 0.87 0.84 0•84 0.84 certify that this map has been �+ TR-108 <br /> reviewed by me and is true and �7 <br /> 0.90 0.90 Approved 3/20/17 <br /> Legend correct to the best of m knowledge <br /> 7212.D 0.93 1.74 Y g <br /> and information relying on work <br /> Permit Boundary 7213.0 0.99 <br /> 0.96 0.96 performed by others, and based on <br /> 1.02 1.02 2.70 <br /> �. <br /> information supplied by experts <br /> High Water Line <br /> identified in section 2.03.3 of the <br /> 7214.0 1.05 3.72 Colowyo Coal Company L.P. Permit. Page Exh. 7-23J-5 <br /> �Section Through Dam 1.08 1. <br /> 7215.0 1.11 08 4.80 <br /> 5 Coal Stockpile Pond <br /> 7216.0 1. 15 1.155.95 `,,�,���t��t��������i♦ <br /> Compacted Fill 1.18 ��� Ap 0 L /C ♦i�� <br /> 1.21 1.21 ••••• F - Design Information <br /> 7217.0 1.24 7.16 :moo°;� pFr:,�J' <br /> ..w d. Rlprap 4 . <br /> 7218.0 1.31 •31 1.31 8.44 . 200 <br /> -.. 3 257 SCALE. As Noted <br /> � / ��., <br /> � � l�(.3a���� � � ,, � a �,l" ;� DATE: 72/30I2076 <br /> Contour interval is 2 ft within pond area. TOTAL CAPACITY 8.44 ACRE-FEET(DESIGN o <br /> �. .., ,n ••• •. w U DRWG.BY. TCP <br /> , F <br /> •••••••' \��S� COAL APPROVED BY.° <br /> Contour interval elsewhere is as noted. S <br /> �_. ♦ 0 <br /> r <br /> ��♦ S� NAL �� \ti�FF�COMPANY DRwG No. <br /> 50 0 <br /> Epp4R-PRODUCTiON_E <br /> Exh. 7-23 <br /> 50 )00 <br /> THOMAS C PETERSON Colowyo Mine <br /> P.E. No. 32257 5731 State Highway 13 Figure J2 <br /> Meeker,Colorado 81641 <br /> Coal Stock He �������6 No. REVISION DATE BY HK <br /> DATE <br /> Scale 1' - 50' TR-108 New Drawing 12130116 TCP TT <br /> Exh 7-23 FigJ2PondDesign.dwg <br />