SW3240203_Design Calculations_20240522

5/22/2024 APPENDIX D
UNION COUNTY SHRINE CLUB
DITCHLINE CALCULATION
Impervious Composite DITCH
Description Drain.Area DA Area Grass Area Coefficient Q10 PEAK SLOPE VELOCITY STABLE
(SF) (acres) (sf) (sf) Cc 110 (in/hr) (cfs) (ft./ft.) (fps) LINING (YES/ NO)
Ditch 1 6,527 0.15 2,189 4,338 0.72 7.90 0.85 0.0263 1.27 Sod Former YES
Ditch 2 15,316 0.35 4,207 11,109 0.70 7.90 1.93 0.0122 1.08 Sod Former YES
Ditch 3 27,310 0.63 13,740 13,570 0.78 7.90 3.84 0.0100 1.22 Sod Former YES
Ditch 4 7,801 0.18 1,383 6,418 0.66 7.90 0.94 0.0107 0.77 Sod Former YES
Cc Example Equation >>> ((2,189 x 0.95) + (4,338 x 0.60))/6,527
sssssssssssss.#44
f SEAL
18197 a
,,,''•.;rf W. ' „..
5/21/2024