PERMFILE130375

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 08h HYDROLOGIC EVALUATION OF SEDIMENTATION PONDS A, D AND G
• Media Type: D
• Archive: No

• Table 4
LASER ENGINEERING d TECHXOLOGY~, (NC. 2/90
<19 CANYON AVENUE, SUITE 225
FCRi COlLINS, CO 80521
STAG"c-DISCHARGE RELATIONSHIP FOR POND D
COLORADO YAMPA COAL COMPANY ECKNAN PARK HIVE
Stage Riser Spoil Total FLou Emergency Total
In Discharge Spring Through Spillway Discharge
Pcnd D Capacity Basef Low • Riser Discharge••
(ft) (efs) (cfs) (cfs) (cfs) (cfs)
6846.0 0.0 0.0 0.0 0.0 0.0
6846.5 0.0 0.0 0.0 0.0 0.0
6867.0 1.2 0.7 0.5 0.0 0.5
6447.5 1.7 0.7 1.0 0.0 1.0
6848.0 2.1 0.7 1.4 0.0 1.4
6448.5 2.4 0,7 1.7 0,0 1.7
6849.0 3.8 0.7 3.1 0.0 3.1
. 6849.5 4.6 0.7 3.9 0.0 3.9
6850.0 5.8 0.7 5.1 0.0 5.1
• 6850.5 14.2 0.7 13.5 0,0 73.5
6451.0 14.7 0.7 14.0 8.0 22.0
6851.5 15.3 0.7 14.6 117.1 131.7
6852.0 75.8 0.7 75.7 290.7 305.8
6852.5 t6.3 0,T 15.6 510.0 525.6
6853.0 76.7 0.7 16.0 766.9 782.9
6x53.5 17.2 0,7 16.5 1056.5 1073.0
6856.0 17.6 0.7 16.9 1375.4 1392.4
6454.5 18.7 0.7 17.4 1721.3 1738.7
6255.0 18.5 0.7 17.8 2092.1 2709.9
• Flow capacity of riser Less spoil spring 8 underground
mine baseflow of 0.2 d 0.5 cfs, respectively
•• Spillway Discharge ~ 2.8 • 90 • X^1.5
Spillway Elevation ~ 6850.9
1r 1
U
7
Water Engineering 8 Technology, Inc.