REP26506

• Permit No: C1981013
• IBM Index Class Name: Report
• Doc Date: 2/22/1989
• Doc Name: NEW ELK MINE PN C-81-012 RESPONSE TO STIPULATION 44 DESIGN FOR THE OLD REFUSE PILE DRAINAGE TO SAFEL
• From: WYOMING FUEL CO
• To: MLRD
• Permit Index Doc Type: Waste Pile/Fill Report
• Media Type: D
• Archive: No

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TABLE 21
CULVERT SIZING
Culvert
Number
2(2)
3
4
5(3)
6
7
8(7)
9
10
11
12(7)
13
15
16
17
18
19
20
21
23
24
25
27
26
29
30(5)
31(6)
32(7)
33(7)
39(7)
35(9)
36(9)
37(9)
lOYR - 24 HR
Peak Discharge
(cF5)
210.0
40.6
40.6
174.8
106.9
5. (IO)
11.0 (10)
12.6
8.7
17.9
27.4
3.5
9:1 (10)
1 9
29:1 (10)
29.1 (10)
56.4
41.5
111.0(8)
46.2
157.2(6)
147.6
3.9
3.9
60.7
5.3
29.1 (10)
10.0
9.2
2.0
4.0
67.0
Ptinimum Culvert(1)
Diameter
(Inches)
60
36
36
60
60
18
2-18
24
24
30
36
18
36
30
36
30
36
46
36 ,
(4)
(4)
42
60
12
12
36
18
36
24
24
18
18
36
(1) From "Handbook of Steel Drainage and Highway Construction Products"
nomograph with no head on pipe and using E~•7/D Scale No. (3).
(2) Sized using 3 ft. of head on pipe (HL4/D = 1.5), HW/D Scale No. (1).
(3) Sized using 2 ft of head on pipe (H[•7/D = 1.5), HW/D Scale No. (3).
(4) Culverts 23 and 24 are inlet culverts to Culvert 25. Culvert 25 was sized
using the Hazen-Plilliams formula Exhibit 19, ~•]est Portal Culvert Data C21
• through C25.
(5) Sized using 1.5 head on pipe (H[d/D = 1.5), HW/D Sale No. (1).
2.05-14 (Revised 03/23/87)
(6) Revised 3-11-68 SDF1
(7) As-Built 3-27-88 SDM
(8) Revised 7-20-88
(9) Revised 8-9-88
(10) Revised 2-14-89 for a 100 yr. 24 hr. event on the refuse area south of
Hwy 12