PERMFILE43021

• Permit No: C1981022
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: DRAINAGE AND SEDIMENT CONTROL CALCULATIONS FOR HUBBARD CANYON VENTILATION FACILITIES
• Section_Exhibit Name: Exhibit 2.05-E3 SECTION 4
• Media Type: D
• Archive: No

~ Sub,Ject Culvert Size for Yard
~ Slooe Runoff
• ~
CALCULATION NOTES
By MOA
Checked
Acct
July 15
Sheet Nc. 4 of 4
I DATA:
i
Slope along ditch out flow from culvert.
5
+ 100 = •050 = 5.0% less culvert installation.
I
' Discharge from yard pond for 25 - 24 storm =
Accwnulated ditch discharge for yard slope R.O.=
Total
2.18 cfs.
2.51 cfs.
4.69 cfs.
_Iq 81
Sheets
i An 18 inch d~ia. culvert @ 1.33% = 5.00 cfs.
i See attachment, "capacities of corrugated culvert pipe when flowing full."
j Cover over pipe =
Culvert
I Slope of culvert _
w I
I
Total
1.0 ft. 30 x .0133 = 0.399
1.5 ft.
.4 ft.
2.9 ft.
I
I
I 5.0
~ -2.9
2.1 100 = 0.021 = 2.1% ditch grade outby culvert.
Culvert out flow ditch size at 2:G slope is:
Triangular in shape 0.0 width bottom.
1.0 deep with 1'i:l slopes.
Capacity of ditch @ 0.5' deep = 6.5 cfs.
C]