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Line 38:
Line 38:
|Drainage Area
|Drainage Area
|Sustaining vegetation, volumetric turnover
|Sustaining vegetation, volumetric turnover
|5 Ha (≥10 Ha preferred)
|style="text-align: left|5 Ha (≥10 Ha preferred)
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|-
|Treatment Volume
|Treatment Volume
|Provision of appropriate level of protection (Table 3.2)
|Provision of appropriate level of protection (Table 3.2)
|See Table 3.2
|style="text-align: left|See Table 3.2
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|Active Storage
|Active Storage
|Detention
|Detention
|Suspended solids settling 24 hrs (12 hrs if in conflict with min. orifice size)
|style="text-align: left|Suspended solids settling 24 hrs (12 hrs if in conflict with min. orifice size)
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|Forebay
|Forebay
|Pre-treatment
|Pre-treatment
|
|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;
Line 63:
Line 63:
|Permanent Pool Depth
|Permanent Pool Depth
|Vegetation requirements, rapid settling
|Vegetation requirements, rapid settling
|The average permanent pool depth should range from 150 mm to 300 mm
|style="text-align: left|The average permanent pool depth should range from 150 mm to 300 mm
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|Active Storage Depth
|Active Storage Depth
|Storage/flow control, sustaining vegetation
|Storage/flow control, sustaining vegetation
|Maximum 1.0m for storms < 10 year event
|style="text-align: left|Maximum 1.0m for storms < 10 year event
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|-
|Side Slopes
|Side Slopes
|Safety
|Safety
|
|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
Line 77:
Line 77:
|Inlet
|Inlet
|Avoid clogging/freezing
|Avoid clogging/freezing
|
|style="text-align: left|
#Minimum 450 mm;
#Minimum 450 mm;
#Preferred pipe slope: >1%;
#Preferred pipe slope: >1%;
Line 84:
Line 84:
|Outlet
|Outlet
|Avoid clogging/freezing
|Avoid clogging/freezing
|
|style="text-align: left|
#Minimum: 450mm outlet pipe;
#Minimum: 450mm outlet pipe;
#Preferred pipe slope: >1%;
#Preferred pipe slope: >1%;
Line 92:
Line 92:
|Maintenance Access
|Maintenance Access
|Access for backhoes or dredging equipment
|Access for backhoes or dredging equipment
|
|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
Line 98:
Line 98:
|Buffer
|Buffer
|Safety
|Safety
|Minimum 7.5 m above maximum water quality/erosion control water level
|style="text-align: left|Minimum 7.5 m above maximum water quality/erosion control water level
|}
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