PERMFILE125987

• Permit No: C1984062
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Section_Exhibit Name: EXHIBIT 3 SEDIMENT CONTROL PLAN
• Media Type: D
• Archive: No

TABLE 90-06-8
• M 3 S DIVERSION DITCH SCHEDULE
Volume Calculations: (SCS,19771 DITCH H1 DITCH H2
Undisturbed/Reclaimed Area, ac. (CN=70) 3.8 12.5
Disturbed Area, ac. (CN=82) 2.0 10.2
Total Area, ac. 5.8 22.7
Weighted AMC-II Curve Number 74 75
25-yr, 24-hr, Rainfall, in. 2.1 2.1
25-yr, 24-hr, Runoff, in. 0.40 0.43
25-yr, 24-hr, Runoff, ac-ft. 0.19 0.81
Discharge Calculations: (SCS, 1977)
Type II Storm Discharge, cfs/in. 10.2 18.0
Uncorrected Storm Discharge, cfs. 4.1 7.7
Slope Correction 0.96 0.99
Shape Correction 0.57 2.27
• Corrected Peak Flow, cfs. 2.2 17.3
Design Calculations: (Mannings Equation)
Channel Side Slope, ft/ft. 0.5 0.5
Channel Bottom Width, ft. 1.0 1.0
Channel Slope ft/ft. 0.016 0.013
Mannings n 0.035 0.035
Channel Depth, ft. 1.0 3.0
Depth of Flow, ft. .63 2.09
Flow Area, ft.' 0.84 4.29
Flow Velocity, fps 2.61 4.03
Channel Lining soil/rock soil/rock
•
TR 91-07 Ex. 3-26 Revised 01/13/92