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Inspection and Maintenance: Enhanced Swales (view source)
Revision as of 16:25, 6 July 2022
, 2 years ago→Routine Maintenance - Key Components and I&M Tasks
|[[File:Veg Cover Pass swale.PNG|315px|thumb|center|The planted portion of the swale is well covered with dense, attractive vegetation which helps to maintain its stormwater treatment function and aesthetic value.]]
|[[File:Veg Cover Pass swale.PNG|315px|thumb|center|The planted portion of the swale is well covered with dense, attractive vegetation which helps to maintain its stormwater treatment function and aesthetic value.]]
|[[File:Veg Cover Fail swale.PNG|315px|thumb|center|Major portions of the swale surface contains dead or dying vegetation which reduces its aesthetic value and could be negatively affecting its stormwater treatment function.]]
|[[File:Veg Cover Fail swale.PNG|315px|thumb|center|Major portions of the swale surface contains dead or dying vegetation which reduces its aesthetic value and could be negatively affecting its stormwater treatment function.]]
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|'''[[Check Dams]]'''
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Structures constructed of a non-erosive material, such as suitably sized [[aggregate]], wood, gabions, riprap, [[stone]] or concrete; used to slow runoff water. Can be employed in practices such as bioswales and enhanced grass swales. Constructed across a drainage ditch, [[swale]], or channel to lower the speed of concentrated flows for a certain design range of storm events and to promote infiltration.
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*Remove accumulated sediment by rake/shovel.
*Check for signs of oil or grease contamination (e.g. sheen on surface of water when sediment is submerged).
*If oil or grease contamination is suspected, submit a sediment sample for contaminant testing by an accredited laboratory to determine the proper disposal method. Install check dams where specified in the final design.
*Assess the CDA for changes in land cover or point sources of sediment.
*Inspect and remove sediment from [[pretreatment]] devices.
*If problems persist, consider adding pretreatment devices or increasing frequency of routine maintenance.
|[[File:Check Dam Pass swale.PNG|315px|thumb|center|The check dams are visible and continue to help retain sediment and spread the flow of water across the BMP surface.]]
|[[File:Veg Cover Fail swale.PNG|315px|thumb|center|Sediment has accumulated on the upstream side of the check dam and is affecting its function. (Source: Tennessee EPSC).]]
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