Changes

*Re-grade and restore cover over any animal burrows, sunken areas when ≥ 10 cm in depth and erosion rills when ≥ 30 cm in length;

*Re-grade and restore cover over any animal burrows, sunken areas when ≥ 10 cm in depth and erosion rills when ≥ 30 cm in length;

*Add stone cover to maintain 5 to 10 cm depth where specified in the planting plan

*Add stone cover to maintain 5 to 10 cm depth where specified in the planting plan

|[[File:Filter Bed Pass swale.PNG|315px|thumb|center|The filter bed has retained its original grading without any sharp depressions that would indicate surface bed sinking.]]

|[[File:Filter bed grass pass.png|315px|thumb|center|There are no erosion rills, gullies or bare soil areas on the filter strip surface. (Photo Source: Washington State Department of Transportation, 2018)<ref>Washington State Department of Transportation. 2018. Vegetated Filter Strips: Low-impact development fact sheet. Authored by: Maria Cahill, Derek Godwin, and Jenna Tilt. Published June 2018. Accessed: 14 July 2022. https://catalog.extension.oregonstate.edu/em9208/html</ref>]]

[[File:Surface ponding Pass Swale.PNG|315px|thumb|center|TThe maximum surface ponding depth behind check dams matches what was specified in the final design. (Source:

|[[File:Filter bed grass fail.JPG|300px|thumb|center|Scour erosion along the inlet edge is visible. Bare soil areas and bright green biofilm on the filter strip surface indicate that concentrated flow and surface ponding occurs regularly.]]  

Mark M. Holeman, Inc., 2015)<ref>Mark M. Holeman, Inc. 2015. What is a Bio-Swale? Authored by Rick Blankenship. 25 September 2015. Accessed 5 July 2022. http://www.holemanlandscape.com/2015/09/25/what-is-a-bio-swale/</ref>]]

[[File:Filter bed depression grass fail.JPG|300px|thumb|center|Clear evidence of bed sinking on the lawn, creating preferential ponding areas which could cause vegetation to die off (Source: The Anxious Gardener<ref>The Anxious Gardner. n.d. Gallery. Accessed 14 July 2022. https://theanxiousgardener.com/</ref>)]].

|[[File:Filter Bed Fail swale.PNG|300px|thumb|center|Clear evidence of bed sinking is visible, creating a preferential ponding area where vegetation has died off.]]  

[[File:Surface ponding Fail Swale.PNG|300px|thumb|center|The maximum ponding depth of the swale is significantly deeper than intended as the elevation of the check dam or overflow outlet is too high. (Source: Stiffler, 2012<ref>Stiffler, L. 2012.RAIN GARDEN REALITY CHECK: Comparing LID to conventional system failures. Authored by: Eric De Place. 18 April 2012. Sightline Institute. Sustainable Living Series. Accessed 5 July 2022. https://www.sightline.org/2012/04/18/rain-garden-reality-check/</ref>)]]

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|'''[[Vegetation]]'''

|'''[[Vegetation]]'''

*Cut back spent plants

*Cut back spent plants

*Divide or thin out overcrowded plants

*Divide or thin out overcrowded plants

|[[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:Vegetation grass pass.JPG|315px|thumb|center|The vegetated filter strip is evenly covered with dense turf grass which helps to maintain its stormwater treatment function and aesthetic value. (Photo Source: Trinkaus Engineering))]]  

|[[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:Vegetation grass fail.JPG|315px|thumb|center| Major portions of the filter strip contain bare soil or dead vegetation which reduces its aesthetic value and could be negatively affecting its stormwater treatment function]]  

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