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Appendix E - Stormwater Management Plan
Attached to the e-mail Multiple Housing – Type 3 Retirement & Special Needs (10 units) - MCU17/0551.
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Log in to see the plans as drawnBox Culvert or Multiple Pipe Outlets
Sizing of the scour rock protection for box culvert outlets were determined using calculations
specified in Section 10.4.15 of QUDM, 2013. Below indicates rock protection requirements and the
adopted outlet rock protection configuration at each culvert outlet.
Central Bioretention Basin Inflow (1500 Southern Bioretention Basin
Location
x 600) Inflow (2 x 750)
Q (m3/s) 1.67 2.08
Area (m2) 0.9 0.88
Outlet Velocity (m/s) 1.9 2.35
Diameter or Width (m) 1.5 0.75
Cell Height (m) 0.6 ‐
Multiple Cells? NO Yes
Length Ratio D:L 3 3
Width (m) 1.5 2.16
Length (m) 4.5 6.5
d50 (mm) 200 200
Thickness of Rock Protection (mm) 400 400
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