Changes

* Native soil infiltration rate for Full Infiltration Design scenario was assumed to be 20 mm/h, and a safety factor of 2.5 was applied to calculate the design infiltration rate.

* Native soil infiltration rate for Full Infiltration Design scenario was assumed to be 20 mm/h, and a safety factor of 2.5 was applied to calculate the design infiltration rate.

* Ditch inlet catch basin structure located at furthest downgradient end, with connection to storm sewer pipe, included as the outlet.  

* Ditch inlet catch basin structure located at furthest downgradient end, with connection to storm sewer pipe, included as the outlet.  

* Operation and maintenance (O&M) cost estimates assume annual inspections, removal of trash and debris twice a year, removal of sediment from outlet catch basin annually, and removal of weeds twice a year. Verification inspections are included every 5 years to confirm adequate maintenance, and every 15 years to confirm adequate drainage performance through in-situ surface infiltration rate testing.

* Operation and maintenance (O&M) cost estimates assume annual inspections, removal of trash and debris twice a year, removal of sediment from curb inlets and outlet catch basin annually, and removal of weeds twice a year. Verification inspections are included every 5 years to confirm adequate maintenance, and every 15 years to confirm adequate drainage performance through in-situ surface infiltration rate testing.

* Impervious drainage area to pervious swale footprint area of 10:1 (tool default value).

* Impervious drainage area to pervious swale footprint area of 10:1 (tool default value).

* Designed with a trapezoidal cross section with a top width of 4.75 m, bottom width of 0.75 m, and 2.5:1 side slopes (tool default values).

* Designed with a trapezoidal cross section with a top width of 4.75 m, bottom width of 0.75 m, and 2.5:1 side slopes (tool default values).

==Construction Costs==

==Construction Costs==

[[File:Construction Breakdown EnhancedSwales Full Infil.PNG|thumb|center|950px|'''Construction Costs Per Unit Drainage Area (CAD$/m²) - Full Infiltration Design, 25 mm Treatment''']]

[[File:Construction Breakdown EnhancedSwales Full Infil 2023.PNG|thumb|center|950px|'''Construction Costs Per Unit Drainage Area (CAD$/m²) - Full Infiltration Design, 25 mm Treatment''']]

===25-Year life cycle cost break down===

===25-Year life cycle cost break down===

[[File:25yr LCCT EnhancedSwales Full Infil.PNG|thumb|center|900px|'''Enhanced Swales: Full Infiltration''']]

[[File:25yr LCCT EnhancedSwales Full Infil 2023.PNG|thumb|center|900px|'''Enhanced Swales: 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>

===50-Year life cycle cost break down===

===50-Year life cycle cost break down===

[[File:50yr LCCT EnhancedSwales Full Infil.PNG|thumb|center|900px|'''Enhanced Swales: Full Infiltration''']]

[[File:50yr LCCT EnhancedSwales Full Infil 2023.PNG|thumb|center|900px|'''Enhanced Swales: 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>

==Cost Summary Tables==

==Cost Summary Tables==

===Full Infiltration===

===Full Infiltration===

[[File:CVC Office, Grass Swale.JPG|500px|thumb|Enhanced Grass [[swale]] in CVC headquarters parking lot, Mississauga ON.]]

[[File:CVC Office, Grass Swale.JPG|650px|thumb|Enhanced Grass [[swale]] in CVC headquarters parking lot, Mississauga ON.]]

[[File:Design Table EnhancedSwales Full Infil.PNG|700px]]<br>

[[File:Design Table EnhancedSwales Full Infil 2023.PNG|700px]]<br>

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