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Vegetated Filter Strip: Life Cycle Costs (view source)
Revision as of 19:03, 10 March 2023
, 1 year ago→Design Assumptions
Design and operation and maintenance program assumptions used to generate cost estimates are based on tool default values and the following STEP recommendations:
Design and operation and maintenance program assumptions used to generate cost estimates are based on tool default values and the following STEP recommendations:
* Filter strip length of 5 metres.
* Filter strip length of 5 metres and width of 100 metres.
* Maximum acceptable impervious drainage area to pervious footprint area ratio of 4:1.
* Maximum acceptable impervious drainage area to pervious footprint area ratio of 4:1.
* Swale (0.3 m depth) and ditch inlet catch basin connected to storm sewer as outlet.
* Swale (0.3 m depth) and ditch inlet catch basin connected to storm sewer as outlet.
==Construction Costs==
==Construction Costs==
[[File:Construction Breakdown VegStrip Full Infil.PNG|thumb|center|950px|'''Construction Costs Per Unit Drainage Area (CAD$/m<sup>2</sup>) - Full Infiltration Design, 25 mm Treatment''']]
[[File:Construction Breakdown VegStrip Full Infil 2023.PNG|thumb|center|950px|'''Construction Costs Per Unit Drainage Area (CAD$/m<sup>2</sup>) - Full Infiltration Design, 25 mm Treatment''']]
===25-Year life cycle cost break down===
===25-Year life cycle cost break down===
[[File:25yr LCCT VegStrip Full Infil.PNG|thumb|center|900px|'''Vegetated Filter Strips: Full Infiltration''']]
[[File:25yr LCCT VegStrip Full Infil 2023.PNG|thumb|center|900px|'''Vegetated Filter Strips: Full Infiltration''']]
<small>'''Note:''' Click on each image to enlarge to view associated life cycle cost estimate.</small><br>
<small>'''Note:''' Click on each image to enlarge to view associated life cycle cost estimate.</small><br>
</br>
===50-Year life cycle cost break down===
===50-Year life cycle cost break down===
[[File:50yr LCCT VegStrip Full Infil.PNG|thumb|center|900px|'''Vegetated Filter Strips: Full Infiltration''']]
[[File:50yr LCCT VegStrip Full Infil 2023.PNG|thumb|center|900px|'''Vegetated Filter Strips: Full Infiltration''']]
<small>'''Note:''' Click on each image to enlarge to view associated life cycle cost estimate.</small><br>
<small>'''Note:''' Click on each image to enlarge to view associated life cycle cost estimate.</small><br>
</br>
==Cost Summary Tables==
==Cost Summary Tables==
===Full Infiltration===
===Full Infiltration===
[[File:Filter bed grass pass.png|500px|thumb|Exampel of a mature filter strip beside a major highway, Washington State, U.S. (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:Filter bed grass pass.png|600px|thumb|Exampel of a mature filter strip beside a major highway, Washington State, U.S. (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:Design Table VegStrip Full Infil.PNG|700px]]<br>
[[File:Design Table VegStrip Full Infil update 2023.PNG|800px]]<br>
</br>
</br>
==References==
==References==