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→Design
|Length-to-Width Ratio
|Length-to-Width Ratio
|Maximize flow path and minimize short-circuiting potential
|Maximize flow path and minimize short-circuiting potential
|i) Overall: minimum 3:1; ii) Forebay: minimum 2:1
|
#Overall: minimum 3:1;
#Forebay: minimum 2:1
|-
|-
|Permanent Pool Depth
|Permanent Pool Depth
|Side Slopes
|Side Slopes
|Safety
|Safety
|i) 5:1 For 3 m above and below permanent pool (ii) Maximum 3:1 elsewhere
|
#5:1 For 3 m above and below permanent pool;
#Maximum 3:1 elsewhere
|-
|-
|Inlet
|Inlet
|Avoid clogging/freezing
|Avoid clogging/freezing
|i) Minimum 450 mm; ii) Preferred pipe slope: >1%; iii) If submerged, obvert 150 mm below expected maximum ice depth
|
#Minimum 450 mm;
#Preferred pipe slope: >1%;
#If submerged, obvert 150 mm below expected maximum ice depth
|-
|-
|Outlet
|Outlet
|Avoid clogging/freezing
|Avoid clogging/freezing
|i) Minimum: 450mm outlet pipe; ii) Preferred pipe slope: >1%; iii) If orifice control used, 75mm diameter minimum; (iv) Minimum 100mm orifice preferable
|
#Minimum: 450mm outlet pipe;
#Preferred pipe slope: >1%;
#If orifice control used, 75mm diameter minimum;
#Minimum 100mm orifice preferable
|-
|-
|Maintenance Access
|Maintenance Access
|Access for backhoes or dredging equipment
|Access for backhoes or dredging equipment
|(i) Provided to approval of Municipality; (ii) Provision of maintenance drawdown pipe preferred
|
#Provided to approval of Municipality;
#Provision of maintenance drawdown pipe preferred
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|-
|Buffer
|Buffer