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Home My WebLink AboutSW6240103_Design Calculations (Riprap)_20240119 OUTLET PROTECTION DATE DESIGN PHASE DESIGN 11-30-23 PRELIM / / PROJECT NAME PROJECT NO CONSTR / X / The Leander Lee Preserve 2006 REVISION / / LOCATION BY RECORD / / Harnett County, North Carolina BPB OTHER / / CHECKED BY (SPECIFY) CSB Storm Outlet Structure FES No.= PIPE 1 OUT Qio/Qfull = 0.95 Pipe Dia= 36 in V/Vfull = 1.14 Q10= 28.03 cfs V= 4.7 fps Qfull = 29.40 cfs Vfull = 4.15 fps From Fig. 8.06.b.1: Zone = 2 From Fig. 8.06.b.2: D5o = 8 in DMAX = 12 in III �•�•�•�•�•� Riprap Class = B i•••••i•••• L Apron Thickness = 18 in ••••••••••• _•�•��••�� 3 Apron Length 18.0 ft 1•�•�•�•1•1•�• Apron Width @ Outlet = 9 ft •• •• ••• Apron Width @ End = 21.0 ft Length Storm Outlet Structure FES No.= PIPE 2 OUT Q1o/Qfull = 0.85 Pipe Dia= 18 in V/Vfull = 1.12 Qio= 6.73 cfs V= 5.0 fps Qfull = 7.92 cfs Vfull = 4.47 fps From Fig. 8.06.b.1: Zone = 2 From Fig. 8.06.b.2: D5o = 8 in DMAX = 12 in Riprap Class = B s Apron Thickness = 18 in 3 Apron Length = 9.0 ft Apron Width @ Outlet = 4.5 ft Apron Width @ End = 10.5 ft Length 2006-Storm drainage.xlsx LATEST REVISION:1/19/2024 10:48 AM PAGE 1 OF 2 OUTLET PROTECTION DATE DESIGN PHASE DESIGN 11-30-23 PRELIM / / PROJECT NAME PROJECT NO CONSTR / X / The Leander Lee Preserve 2006 REVISION / / LOCATION BY RECORD / / Harnett County, North Carolina BPB OTHER / / CHECKED BY (SPECIFY) CSB Storm Outlet Structure FES No.= PIPE 3 OUT Q1o/Qfull = 0.96 Pipe Dia= 18 in V/Vfull = 1.14 Qio= 7.99 cfs V= 5.3 fps Qfull = 8.30 cfs Vfull = 4.69 fps From Fig. 8.06.b.1: Zone = 2 From Fig. 8.06.b.2: D5o = 8 in DMAX = 12 in Riprap Class = B s Apron Thickness = 18 in 3 Apron Length 9.0 ft Apron Width @ Outlet = 4.5 ft Apron Width @ End = 10.5 ft L Length 1 Storm Outlet Structure FES No.= PIPE 4 OUT Q1o/Qfull = 0.70 Pipe Dia= 18 in V/Vfull = 1.08 Q10= 5.83 cfs V= 5.1 fps Qfull = 8.30 cfs Vfull = 4.69 fps From Fig. 8.06.b.1: Zone = 2 From Fig. 8.06.b.2: D5o = 8 in DMAX = 12 in •�•�•••••••••• Riprap Class = B IttIIIIiJJJIII Apron Thickness = 18 in _Apron Length 9.0 ft Apron Width @ Outlet = 4.5 ft Apron Width @ End = 10.5 ft Length 2006-Storm drainage.xlsx LATEST REVISION:1/19/2024 10:48 AM PAGE 2 OF 2