Changes

|[[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]]'''

|'''[[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.

Structures constructed of a non-erosive material, such as suitably sized [[Reservoir aggregate|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.  

*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).  

*Check for signs of oil or grease contamination (e.g. sheen on surface of water when sediment is submerged). I suspected, submit a sediment sample for contaminant testing by an accredited laboratory to determine the proper disposal method.  

*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.  

*Assess the CDA for changes in land cover or point sources of sediment.  

*Inspect and remove sediment from [[pretreatment]] devices.  

*Inspect and remove sediment from [[pretreatment]] devices.  

*If problems persist, consider adding pretreatment devices or increasing frequency of routine maintenance.  

*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:Check Dam Pass swale.PNG|355px|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).]]  

|[[File:Veg Cover Fail swale.PNG|355px|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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