2019-03-21_PERMIT FILE - C1981008A ‎(4)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 3/21/2019
• Doc Name: Collection/Diversion Ditches and Culverts Design Parameters
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-1
• Media Type: D
• Archive: Yes

Table 2.05.3(3)-1 Collection Ditch and Diversion Ditch Designs Entire Permit Area
Structure
Watershed
Watershed
Watershed
Runoff
Design
Time of
Peak
Avg.
Ditch
Ditch
Velocity at
Comments
Basin(s)
Area
% Avg.
Curve
Storm
Conc.
Flow
Ditch
Bottom
Depth (ft)
Design Flow
(acres)
Slope
No.
(yrs)
(hrs)
(cfs)
Slope %
Width (ft)
(ft/sec)
C19
1
5.2
5.7
78
100
0.26
6.2
2.1
2
0.58
3.35
North side of 5 Street
C20
7, 19,22
53.5
5.2
78
100
0.64
65.8
3.0
10
0.91
6.14*
North side of 5` Street.
Only 20' on either side of
culvert 112 needs 10 feet
width. Remainder of ditch
needs to be 5 feet wide
since drainage is minimal.
C23
Pond 009
-
-
-
25
-
0.15
9.3
4
0.51
0.47
Attachment 2.05.3(3)-30
C24
13
2.1
11.7
82
100
0.13
4.1
1.5
0
0.79
3.3
West edge of 2700 Road
C29
Pond 015
-
-
-
100
-
2.85
2.0
4
0.58
2.39
Attachment 2.05.3(3)-33
C33
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Replaced with straw
wattles, see Section 5
D108
18
41.7
6.4
78
10
0.50
10.7
2.6
2
0.68
4.7
Mostly offsite undisturbed
j
j
j
1
j
j
j
j
j area with ponding
*The numerator and denominator in average ditch slope for CI I designate two distinct ditch lengths, the mild portion and the steep portion. The steep portion for these
ditches will be lined with cobbles/shingles. Cobbles and Shingles have a manning's n of 0.035 which reduces the velocity to acceptable levels. In installation, the
cobbles/shingles may be substituted by durable rock of D50 of 8" size. These special ditch sections are shown on Map 2.05.3(3)-1.
Ditch C20 will have lining of D50 of 8" size for 20' length on either side of Culvert 112. The remainder of this ditch will have no lining.
Attachment 2.05.3(3)-1 Page 7 July 2018 (TR -84)