PERMFILE69133

• Permit No: C1981012A
• IBM Index Class Name: Permit File
• Doc Date: 3/20/2006
• Section_Exhibit Name: Section 2.05 Operation and Reclamation Plan
• Media Type: D
• Archive: Yes

Table 21
Culvert Sizing

10YR - 24HR Minimum"~ Culvert
Culvert Number Peak Discharge (CFS) Diameter (inches) Comments
43" 7.3 18 MR-401/92
44" 7.3 18 MR-401192
45 2.62 15 TR-28 9/93
46 2.26 12 TR-3112/3/93
47 2.61 15 Revised 5/95
48 49.84 42 TR-3112/3/93
49 54.05 42 TR-2710/15/93
50 4.05 18 TR-2710/15/93
51 55 42 TR-2710/15/93
52 48.59 36 TR-2710/15/93
53 6.4 21 TR-2710/15/93
54 75.51 48 TR-2710/15/93
55 1.01 8 5/95
56 4.39 18
57 51.22" 1@48' or2@33" 5/95
58 1.45 12 5/95
59 1.45 9 5/95
60 13.38~'~ 24 5195 .
61 0.95 8 5/95
62 0.68 12 9/95
63 1.28 12 9/95
64 8.75 24
65 0.1 12
RDA-A 2.32 12 TR-28 9/93
RDA-B 4.02 15 TR-28 9/93
Relief Drains
S. of D34B 0.5 24" Half Culvert TR-27 10/15/93
"' - From "Handbook of Steel Drainage and Highway Construction Products"
nomograph with no head on pipe and using HW/D Scale No. (3).
X21 Sized using 3 ft. of head on pipe (HW/D = 1.5), HW/D Scale No. (1).
~'~ Sized using 2.4 ft. of head on pipe (HW/D = 1.8), HW/D Scale No. (3).
~"' Culverts 23 and 24 are inlet culverts to Culvert 25 Culvert 25 was sized using the
Hazen Williams formula Exhibit 19, West Portal Data C21 through C25
j5~ Sized using 1.5 ft. of head on pipe (HW/D = 1.5), HW/D Scale No. (1).
iei As-Built 3/27/88 SDM
~'~ 100-year 24-hour peak discharge
Temporary culverts installed as needed •
NE MR-84 2.05-14A Revised 6/01