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|Pre-treatment  
|Pre-treatment  
|style="text-align: left|
|style="text-align: left|
#Minimum depth: 1 m;
*Minimum depth: 1 m;
#Sized to ensure non-erosive velocities leaving forebay;  
*Sized to ensure non-erosive velocities leaving forebay;  
#Maximum area: 20 % of total permanent pool
*Maximum area: 20 % of total permanent pool
|-
|-
|Length-to-Width Ratio
|Length-to-Width Ratio
|Maximize flow path and minimize short-circuiting potential
|Maximize flow path and minimize short-circuiting potential
|style="text-align: left|
|style="text-align: left|
#Overall: minimum 3:1;   
*Overall: minimum 3:1;   
#Forebay: minimum 2:1
*Forebay: minimum 2:1
|-
|-
|Permanent pool depth
|Permanent pool depth
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|Safety  
|Safety  
|style="text-align: left|
|style="text-align: left|
#5:1 For 3 m above and below permanent pool;  
*5:1 For 3 m above and below permanent pool;  
#Maximum 3:1 elsewhere
*Maximum 3:1 elsewhere
|-  
|-  
|Inlet  
|Inlet  
|Avoid clogging/freezing  
|Avoid clogging/freezing  
|style="text-align: left|
|style="text-align: left|
#Minimum 450 mm;  
*Minimum 450 mm;  
#Preferred pipe slope: >1%;  
*Preferred pipe slope: > 1 %;  
#If submerged, obvert 150 mm below expected maximum ice depth
*If submerged, obvert 150 mm below expected maximum ice depth
|-
|-
|Outlet (See also [[flow control]])
|Outlet (See also [[flow control]])
|Avoid clogging/freezing  
|Avoid clogging/freezing  
|style="text-align: left|
|style="text-align: left|
#Minimum: 450mm outlet pipe;  
*Minimum: 450 mm outlet pipe;  
#Preferred pipe slope: >1%;  
*Preferred pipe slope: > 1 %;  
#If orifice control used, 75mm diameter minimum;  
*If orifice control used, 75 mm diameter minimum;  
#Minimum 100mm orifice preferable  
8Minimum 100 mm orifice preferable  
|-
|-
|Maintenance access  
|Maintenance access  
|Access for backhoes or dredging equipment
|Access for backhoes or dredging equipment
|style="text-align: left|
|style="text-align: left|
#Provided to approval of Municipality;  
*Provided to approval of Municipality;  
#Provision of maintenance drawdown pipe preferred
*Provision of maintenance drawdown pipe preferred
|-
|-
|Buffer  
|Buffer  

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