Laserfiche WebLink
PD1 - PLAN VIEW <br />Scale 1" = 30' <br />Contour Interval = 1' <br />AREA - CAPACITY TABLE <br />(Revised following as- Iwiftsurvey) <br />ELEVATION <br />AREA <br />AVERAGEAREA <br />CAPACITY <br />INCREMENTAL <br />CUMULATIVE <br />(Feet) <br />(Acres) <br />(Acres) <br />(Acre-Feel) <br />(Acre -Feet) <br />7348 <br />0.0307 <br />0 <br />0.052 <br />7349 <br />0.0740 <br />0.052 <br />0.052 <br />0.085 <br />7350 <br />0.0968 <br />0.085 <br />0.138 <br />0.108 <br />7351 <br />0.1196 <br />0.108 <br />0.246 <br />0.130 <br />7352 <br />0.1398 <br />0.130 <br />0.376 <br />0.150 <br />-7353 <br />0.1592 <br />0,150 <br />0.525 <br />0.169 <br />7354 <br />0.1796 <br />0,169 <br />0.695 <br />0.190 <br />7355 <br />0.2008 <br />0.190 <br />0.885 <br />0.212 <br />7356 <br />0.2230 <br />0,212 <br />1.097 <br />TOTAL CAPACITY 1.097 ACRE -FEET (AS BUILT) <br />SEDCAD modeling conducted during December 2011 on the Prospect Pond 2011 case <br />indicates this pond needs to be maintained at a water elevation below elevation 7353 <br />for proper operation of the Prospect Pond. <br />l <br />PD2 - PLAN VIEW <br />Scale 1" = 30' <br />Contour Interval = 1' <br />AREA - CAPACITY TABLE <br />(Revised Nowing asbulit sum y) <br />ELEVATION <br />AREA <br />AVERAGEAREA <br />CAPACITY <br />INCREMENTAL <br />CUMULATIVE <br />(Feet) <br />(Acres) <br />(Acres) <br />(Acre -Feet) <br />(Acre -Feet) <br />7556 <br />0.0542 <br />0 <br />0.070 <br />7557 <br />0.0860 <br />0.070 <br />0.070 <br />0.096 <br />7558 <br />0.1061 <br />0.096 <br />0.166 <br />0.117 <br />7559 <br />0.1272 <br />0.117 <br />0.283 <br />0.139 <br />7560 <br />0.1501 <br />0.139 <br />0.421 <br />0.162 <br />7561 <br />0.1745 <br />0.162 <br />0.584 <br />0.187 <br />-7562 <br />0.1999 <br />0.187 <br />0.771 <br />0.213 <br />7563 <br />0.2266 <br />0.213 <br />0.984 <br />0.240 <br />7564 <br />0.2531 <br />0.240 <br />1.224 <br />TOTAL CAPACITY 1.293 ACRE -FEET (AS BUILT) <br />0.267 <br />7565 <br />0.2803 <br />0.267 <br />1.491 <br />TOTAL CAPACITY 1.491 ACRE -FEET (AS BUILT) <br />SEDCAD modeling conducted during December 2011 on the Prospect Pond 2011 case <br />indicates this pond needs to be maintained at a water elevation below elevation 7562 <br />for proper operation of the Prospect Pond. <br />EP 1 - PLAN VIEW <br />Scale 1" = 30' <br />Contour Interval = 1' <br />AREA - CAPACITY TABLE <br />(Revised following as-bulk survey) <br />ELEVATION <br />AREA <br />AVERAGEAREA <br />CAPACITY <br />INCREMENTAL <br />CUMULATIVE <br />(Feet) <br />(Acres) <br />(Acres) <br />(Acre -Feet) <br />(Acre Feet) <br />7370 <br />0.0492 <br />0 <br />0.071 <br />7371 <br />0.0920 <br />0.071 <br />0.071 <br />0.105 <br />7372 <br />0.1183 <br />0.105 <br />0.176 <br />0.129 <br />7373 <br />0.1402 <br />0.129 <br />0.305 <br />0.151 <br />7374 <br />0.1614 <br />0,151 <br />0.456 <br />0.173 <br />7375 <br />0.1840 <br />0.173 <br />0.629 <br />0.196 <br />7376 <br />0.2086 <br />0.196 <br />0.825 <br />0.222 <br />7377 <br />0.2360 <br />0.222 <br />1.047 <br />0.246 <br />7377.8 <br />0.2556 <br />0.246 <br />1.293 <br />TOTAL CAPACITY 1.293 ACRE -FEET (AS BUILT) <br />SEDCAD modeling conducted during December 2011 on the Prospect Pond 2011 case <br />indicates this pond does not need to be maintained at a water elevation for proper <br />operation of the Prospect Pond. <br />NTEP 1 - PLAN VIEW <br />Scale 1" = 30' <br />Contour Interval = 1' <br />AREA - CAPACITY TABLE <br />(Revised following as-buift survey) <br />ELEVATION <br />AREA <br />AVERAGEAREA <br />CAPACITY <br />INCREMENTAL <br />CUMULATIVE <br />(Feet) <br />(Acres) <br />(Acres) <br />(Acre -Feet) <br />(Acre -Feet) <br />7378 <br />0.0408 <br />0 <br />0.056 <br />7379 <br />0.0709 <br />0.056 <br />0.056 <br />0.083 <br />7380 <br />0.0959 <br />0.083 <br />0.139 <br />0.107 <br />7381 <br />0.1190 <br />0.107 <br />0.247 <br />0.131 <br />7382 <br />0.1427 <br />0.131 <br />0.378 <br />0.155 <br />7383 <br />0.1680 <br />0.155 <br />0.533 <br />0.181 <br />7384 <br />0.1936 <br />0.161 <br />0.714 <br />0.207 <br />7385 <br />0.2201 <br />0.207 <br />0.921 <br />0.234 <br />-7386 <br />0.2471 <br />0.234 <br />1.154 <br />0.261 <br />7387 <br />0.2749 <br />0.261 <br />1.415 <br />0.289 <br />7388 <br />0.3041 <br />o.28s <br />1.705 <br />0.321 <br />7389 <br />0.3382 <br />0.321 <br />2.026 <br />TOTAL CAPACITY2.026 ACRE -FEET (AS BUILT) <br />SEDCAD modeling conducted during December 2011 on the Prospect Pond 2011 case <br />indicates this pond needs to be maintained at a water elevation below elevation 7386 <br />for proper operation of the Prospect Pond. <br />.N <br />1 +70 <br />M <br />i <br />y� <br />�•Qs� oo �-__ <br />l�jq >,0 9�cy <br />i <br />EPA <br />o, <br />NTE <br />9 <br />�c 'o <br />RFACH <br />i <br />I 50 <br />LOCATION VIEW <br />Scale 1" = 400' <br />Contour Interval = 25' <br />l <br />t <br />PD1 <br />W E �` <br />4` <br />40 /fir $ <br />Construction Notes: <br />1) Premining Topography has been supplemented with one foot contour data based field survey <br />data collected by Mine staff. <br />2) See Map 41 for general location and associated drainage areas. <br />3) General requirements for Stock tank design (See Volume 1, Figure 2.05 -6) <br />In general, the stock tanks will have the following characteristics: <br />- Combination excavation and minimal embankment type dugout construction. <br />- Less than 3 acre -feet in volume, typically less than two acre -feet. <br />- Source of runoff is surface runoff from topsoil and revegetated areas. <br />- Maximum 3H: 1V s lopes on side slopes. <br />- Topsoiled and vegetated. <br />- Top of structure width at least 10 feet. <br />- Embankments will typically be less than 13 feet high from the bottom of the pond <br />4) Open channel spillway <br />Minimum width will be 8 feet, typically 12 -15 feet in width. <br />Grass lined spillway minimum, riprap may be specified for particular structures. <br />5) Inspections RECEIVSD <br />An as -built summary table will be submitted upon completion of construction, and these structures will FEB p t, <br />be inspected annually by an engineer or by a qualified professional specialist under the direction of B 21 20 1 Z <br />a professional engineer. A Professional Engineer will certify a report following the inspection. <br />For the specific ponds herein, inspection shall be on a quarterly basis given the impacts of these structures Division of liBCiBrnatiOn, <br />upon the Prospect Pond operation, Mining and Safety <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 is true and <br />correct to the best of my knowledge <br />and information relying on <br />information supplied by experts <br />identified in section 2.03.3 of the <br />Co /owyo Coal Company L.P. Permit. <br />J ♦�,`,,�P� 0 uL I, C, It <br />pool S C. PFT�. �1-�� i <br />Z,915/� <br />i 0 <br />��� SiS /nArn� �Gw♦ ♦ ♦♦ <br />CSI <br />°- - 1 -1" - I� <br />Pond As- Builts <br />East Pit Ponds PD -1, PD -2, EP1 & NTEP1 <br />No. <br />MR- <br />117 <br />o . <br />COAL <br />COMPANY <br />Colovvyo Coal Company <br />New map <br />REVISION <br />SCALE: As Noted <br />DATE: 8123111 <br />DRWG. BY. TCP <br />APPROVED BY: _ <br />DRWG NO. <br />DATE I BY <br />2116112 1 TCP I KRB <br />