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Line 365: − + − Inspection points for dry ponds include (MOE, 2003)<ref name="MOE"></ref>: − *standing water in pond after rain events for longer than designed detention time - may indicate outlet blockage − *pond is always/relatively dry, even throughout designed detention time - may indicate inlet blockage − *vegetation around the pond unhealthy or dying - may indicate poor species selection − *visible sediment accumulation in the bottom of the pond or around the high water line of the pond - may indicate need for sediment removal − − − A field data sheet for the inspection of constructed wetlands is available below. You can download (downward facing arrow on the top righthand side) and print (Printer emoticon on top right hand side) the Dry Pond or Dry Extended Detention Basin Inspection and Maintenance Checklist developed by the City of Ontario, Ohio<ref>City of Ontario, Ohio. https://ontarioohio.org/stormwater-management/</ref>. − − <pdf width="450" height="600">File:SWMFG2016 Guide April-2018.pdf</pdf><br clear="all" />
→Inspection and Maintenance
==Inspection and Maintenance==
==Inspection and Maintenance==
[[File:Dry pond maintenance.jpg|400px|thumb|right|Dry pond maintenance in Alberta (City of Airdrie, 2024)<ref>City of Airdrie. 2024. Airdrie dry pond maintenance extended till next month. https://discoverairdrie.com/articles/airdrie-dry-pondmaintenance-extended-till-next-month</ref>.]]
[[File:Dry pond maintenance.jpg|400px|thumb|right|Dry pond maintenance in Alberta (City of Airdrie, 2024)<ref>City of Airdrie. 2024. Airdrie dry pond maintenance extended till next month. https://discoverairdrie.com/articles/airdrie-dry-pondmaintenance-extended-till-next-month</ref>.]]
Inspection points for dry ponds include (MOE, 2003)<ref name="MOE"></ref>:
*standing water in pond after rain events for longer than designed detention time - may indicate outlet blockage
*pond is always/relatively dry, even throughout designed detention time - may indicate inlet blockage
*vegetation around the pond unhealthy or dying - may indicate poor species selection
*visible sediment accumulation in the bottom of the pond or around the high water line of the pond - may indicate need for sediment removal
A field data sheet for the inspection of constructed wetlands is available below. You can download (downward facing arrow on the top righthand side) and print (Printer emoticon on top right hand side) the Dry Pond or Dry Extended Detention Basin Inspection and Maintenance Checklist developed by the City of Ontario, Ohio<ref>City of Ontario, Ohio. https://ontarioohio.org/stormwater-management/</ref>.
<pdf width="450" height="600">File:SWMFG2016 Guide April-2018.pdf</pdf><br clear="all" />
Maintenance requirements vary between dry ponds and wet ponds, although many maintenance tasks overlap.
Maintenance requirements vary between dry ponds and wet ponds, although many maintenance tasks overlap.
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===Forecasting Sediment Accumulation and Cleanouts===
{| class="wikitable" style="float:right; margin-left:15px;
{| class="wikitable" style="float:right; margin-left:15px;
|+ Maximum allowable sediment accumulation (m³/ha) in dry ponds by catchment imperviousness for basic protection (STEP, 2016)<ref>STEP. 2016. Inspection and maintenance guide for stormwater management ponds and constructed wetlands. https://sustainabletechnologies.ca/app/uploads/2018/04/SWMFG2016_Guide_April-2018.pdf</ref>
|+ Maximum allowable sediment accumulation (m³/ha) in dry ponds by catchment imperviousness for basic protection (STEP, 2016)<ref>STEP. 2016. Inspection and maintenance guide for stormwater management ponds and constructed wetlands. https://sustainabletechnologies.ca/app/uploads/2018/04/SWMFG2016_Guide_April-2018.pdf</ref>
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Accurate forecasting of sediment accumulation in stormwater facilities helps managers schedule and budget for maintenance. MOE (2003) recommends SWMFs be cleaned when the TSS removal efficiency declines below 5% of its original design criterion. For example, if a dry pond is designed to remove 60% of TSS, an efficiency reduction to 55% triggers the need for sediment removal. The rate of sediment accumulation differs for each facility, and depends on factors such as the characteristics of drainage area (e.g., land use; level of imperviousness; upstream construction activities and effectiveness of sediment and erosion control practices) and municipal practices (e.g. frequency of road/catchbasin cleaning, sanding/salting practices).
==Gallery==
==Gallery==