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Line 1: − <table table class = wikitable>+ − <tr><th colspan =2>Erosion and Sediment Control<th>+ − <tr><td></td><td>Bioretention locations should be blocked from construction traffic and should not be used for erosion and sediment control.</td></tr>+ − <tr><td></td><td>Proper erosion and sediment controls should be in place for the drainage area.</td></tr>+ − </table>+ − + − • Gravel for the underdrain should be clean and washed; no fines should be present in the material.+ − • Underdrain pipe material should be perforated and of the correct size.+ − • A cap should be placed on the upstream (but not the downstream) end of the underdrain.+ − • Biomedia should be tested to confirm that it meets specifications.+ − • Mulch composition should be correct.+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + − Elevations+ − Elevations of the following items should be checked for accuracy:+ − • Depth of the gravel and invert of the underdrain − • Inverts for inflow and outflow points − • Filter depth after biomedia is placed − • Ponding depth provided between the surface of the filter bed and the overflow structure − • Mulch depth − − Landscaping and Stabilization − • Correct vegetation should be planted. − • Pretreatment area should be stabilized. − • Drainage area should be stabilized prior to directing water to the bioretention. − − The following items should be checked after the first rainfall event, and adjustments should be made as necessary: − • Outfall protection/energy dissipation at concentrated inflow should be stable. − • Flow should not concentrate and should spread evenly over the filter bed. − • Ponded water at the surface of the bioretenton facility should drain within 24 hours of the end of the storm event. The filter media bed should fully drain within a maximum period of 72 hours. − • Excessive sediment accumulation should not be present.
no edit summary
Common construction pitfalls can be avoided with careful construction supervision that focuses on the following aspects:
Common construction pitfalls can be avoided with careful construction supervision that focuses on the following aspects:
{| class="wikitable"
|-
!colspan =2|Erosion and Sediment Control
|-
|style="width:30px"|
Materials
|Bioretention locations should be blocked from construction traffic and should not be used for erosion and sediment control
|-
||
|Proper erosion and sediment controls should be in place for the drainage area
|-
!colspan =2|Materials
|-
|style="width:30px"|
|Gravel for the underdrain should be clean and washed; no fines should be present in the material
|-
||
|Underdrain pipe material should be perforated and of the correct size (when specified in design)
|-
||
|A cap should be placed on the upstream (but not the downstream) end of the underdrain (when specified in design)
|-
||
|Biomedia should be tested to confirm that it meets specifications
|-
||
|Mulch composition should be correct
|-
!colspan =2|Elevations
|-
|style="width:30px"|
|Depth of the gravel and invert of the underdrain
|-
||
|Inverts for inflow and outflow points
|-
||
|Filter media depth
|-
||
|Ponding depth provided between the surface of the filter bed and the overflow structure
|-
||
|Mulch depth
|-
!colspan =2|Landscaping and Stabilization
|-
|style="width:30px"|
|Correct vegetation should be planted
|-
||
|Pretreatment area should be stabilized
|-
||
|Drainage area should be stabilized prior to directing water to the bioretention
|-
!colspan =2|The following items should be checked after the first rainfall event, and adjustments should be made as necessary:
|-
|style="width:30px"|
|Outfall protection/energy dissipation at concentrated inflow should be stable
|-
||
|Flow should not concentrate and should spread evenly over the filter bed
|-
||
|Ponded water at the surface of the bioretenton facility must drain within 24 hours of the end of the storm event. <br> The biomedia should fully drain within a maximum period of 72 hours
|-
||
|Excessive sediment accumulation should not be present
|}
[[category:Checklists]]
[[category:Construction]]