1987-12-01_PERMIT FILE - C1981017 ‎(165)‎

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 12/1/1987
• Doc Name: David E. Fleming Company Prepartation Plant Area Surface Drainage Plan
• Section_Exhibit Name: Chapter II Attachment 3 to Appendix II-B-7
• Media Type: D
• Archive: No

TABLE II-B-App.7-Att.3-4
IIEVISED SEDIMENTATION PONDS CAPACITIES - 11)83
AREA CHANNEL AVERAGE 10 YR./ 25 YR./ RLINOFF RiIN01'F PEAK 0.1. A.P. POND TOTAL PRESENT
(Acres) LENCTII SLOPE CH 24 IIR. 24 HR. INGIIES DEPTH CFS PE.It AC.STORAGE POND POND ItENAItKS
(Feet) M NUMBER tAINFALL RAINFALLRAlNFAALT INCHES 10 YR. ;EDIMEN1 A.F. STORAGE STORAGE
'I ABLE 2-11TBI. S-1.A -2-5-YR ;TORACE A.F. A.F. ,
1.22 13,5 Four ponds
1 11.63 990. 1.0 93 1.88 2.20 10 yr. 11.1 1.16 1..1.8 in series
001 1.50 16.6
25 yr
0.33 3.5 Included
IA 7.23 1400. 10.7 75 1.88 2.20 10.7 0.72 > 0.20 > 3.26 in No. 1
001 0.48 5.1 3.89
t
✓ 2 3.49 460. 6.5 90 1.88 '2.20 1.01 5.8 5.9 0.35 0.29 0.64
In scr.ies
01I 1.27 7.4 0.51 witli No. I
In series .
0.30 4.0 with No. S;
3 10.04 1100. 10.0 74 1.88 2.20 13.4 1.00 0.25 1.25 Nostiv
N
009 0.45 6.0 3.08 revegetated
0.36 1.3 Enlarged 1983.
4 1.77 500. 12.0 76 1.88 2.20 3.6 0.18 0.05 0.23 rlostly
006 0.52 1..9 0.2S Revegetated
In series
0.25 4.0 with No. 3;
5 12.79 1280. 10'.6 72 1.88 2.20 15.8 1.28 0.27 1.55 Nost.ly new
007 0.38 6.0 1.39 refuse
i TT-T) en-
0.94 3.8 larged in 1954.
6 2.25 500. 7.0 89 1.88 2.20 4.0 0.23 0.18 0.41 mostly
010 1.19 4.8
0.18 Buildings
0.72 3.4 Enlarged 1983.
7' 1.93 600. 13.3 85 1.88 2.20 4.7 0.19 0.12 0.31 0.81 Two ponds
008 0.95 4.5 in series
NOTE: Used SCS, "Procedures For Determining Peak Flows In Colorado" March 1980 Edition
Tables 2-1 and 5-1A
15.1
. Z