Changes

Jump to navigation Jump to search
Line 225: Line 225:
*Remove trash, debris and sediment from pavements (biannually to quarterly) and eavestroughs (annually);
*Remove trash, debris and sediment from pavements (biannually to quarterly) and eavestroughs (annually);
*Replant or seed bare soil areas as needed.
*Replant or seed bare soil areas as needed.
|[[File:CDA Pass swale.PNG|300px|thumb|center|CDA has not changed in size or land cover. Sediment, trash or debris is not accumulating and point sources of contaminants are not visible.]]  
|[[File:CDA grass pass.JPG|340px|thumb|center|CDA has not changed in size or land cover. Sediment, trash or debris is not accumulating and point sources of contaminants are not visible. (Photo Source: CSN, 2013)<ref name="example1">Chesapeake Stormwater Network (CSN). 2013. Bioretention Illustrated: A Visual Guide for Constructing, Inspecting, Maintaining and Verifying the Bioretention Practice. CSN Technical Bulletin
|[[File:CDA Fass swale.PNG|280px|thumb|center|Ponding and sediment accumulation on the CDA is visible indicating runoff is not freely entering the BMP and that the pavement has not been swept recently.).]]  
No. 10. Version 2.0. Ellicott City, MD. http://chesapeakestormwater.net/wp-content/uploads/downloads/2013/10/FINAL-VERSION-BIORETENTION-ILLUSTRATED-102113.pdf</ref>]]  
|[[File:CDA grass fail.JPG|340px|thumb|center|Size of the CDA or land cover within it has changed from design assumptions. Accumulation of sediment on the CDA is visible.]]  
|-
|-
|'''[[Inlets]] & [[Overflow: Gallery|Overflow Outlets]]'''
|'''[[Inlets]] & [[Overflow: Gallery|Overflow Outlets]]'''
Line 236: Line 237:
*Reconfigure splash block if displaced;
*Reconfigure splash block if displaced;
*Remove accumulated sediment
*Remove accumulated sediment
|[[File:Inlet Obstruction Pass swale.PNG|340px|thumb|center|There are no obstructions at the inlet and stormwater can freely flow into the BMP.]]  
|[[File:Inlet cond grass pass.JPG|340px|thumb|center|There is no evidence of damage to the gravel diaphragm inlet that would prevent runoff from entering the BMP nor excessive erosion of the filter bed. (Source: Aquafor Beech).]]  
[[File:Overflow Outlet Pass swale.PNG|thumb|center|340px|The overflow outlet elevation and maximum surface ponding area closely match what was specified in the final design.]]
[[File:Inlet flow grass pass.JPG|thumb|center|340px|There are no obstructions at the inlet and stormwater can freely flow into the BMP as sheet flow from the pavement and [[gravel diaphragm]]. (Photo Source: CSN, 2013<ref name="example1" />]]
|[[File:Inlet Obstruction Fail swale.PNG|300px|thumb|center|Accumulated sediment and vegetation is preventing stormwater from entering the BMP. Sediment on the pavement surface in front of the inlet indicates ponding is occurring.]]  
|[[File:Inlet cond grass fail.JPG|340px|thumb|center|Splash pad has been displaced and could lead to excessive erosion of the filter bed.]]  
[[File:Overflow Outlet Fail swale.PNG|300px|thumb|center|The elevation of the overflow outlet is higher than what was specified in the design, producing a much larger surface ponding area than intended which could produce standing water for prolonged periods and cause vegetation to die off.]]
[[File:Inlet flow grass fail.JPG|340px|thumb|center|Concrete barriers (parking stall curbs) are preventing stormwater from entering the BMP as sheet flow from the pavement and isnteads heavily concentrating the flow (erosion already occurring. Sediment has accumulated at the inlet edge of the BMP.]]
|-
|-
|'''Perimeter'''
|'''Perimeter'''

Navigation menu