2013-10-07_PERMIT FILE - C1981025A ‎(6)‎

• Permit No: C1981025A
• IBM Index Class Name: Permit File
• Doc Date: 10/7/2013
• Doc Name: Final Engineering Calculations
• Section_Exhibit Name: 4.0 Appendix 4-B
• Media Type: D
• Archive: Yes

• Project Title = Ditch Design D-11
WATERSHED HYDROGRAPH
Inflow into structure = #1
Structure type: = Null
-- Watershed data for watershed #1 - Area 8
Curve number = 74.0
Area = 3.0 acres
Hydraulic length = 500.0 feet
Elevation change = 360.0 feet
Concentration time = 0.02 hours
Concentration time type = SCS Upland Curves
Unit hydrograph type = Forested
-- Watershed data for watershed #2 - Area 9
Curve number - 74.0
Area = 23.0 acres
Hydraulic length = 2200.0 feet
Elevation change = 1240.0 feet
Concentration time = 0.08 hours
Concentration time type = SCS Upland Curves
Unit hydrograph type = Forested
Total Area = 26.0 acres
• -- Storm Data - 10 year event -
Total precipitation - 1.8 inches
Storm type = SCS Type 2 storm, 24 hour storm
Peak discharge = 3.43 cfs
Discharge volume = 0.57 acre feet
•
4-B:16 October 1994