Changes

[[File:LCCT Tool 2021.PNG|thumb|500px|link=https://torontoregion-my.sharepoint.com/:u:/g/personal/christy_graham_trca_ca/ETIhvX1R2kJHsLXI6M-xSYMBHycxqvrwicCy1RTBr_aSNA?e=mVJDKN|Version 3.0 of the LID Life Cycle Costing Tool that was updated in December of 2021. (TRCA, 2019)<ref> TRCA. 2019. Low Impact Development Life Cycle Costing Tool. Accessed 22 November 2022. https://sustainabletechnologies.ca/lid-lcct/</ref>)]]

[[File:LCCT Tool 2021.PNG|thumb|500px|link=https://sustainabletechnologies.ca/lid-lcct/|Version 3.0 of the LID Life Cycle Costing Tool that was updated in December of 2021. (TRCA, 2019)<ref> TRCA. 2019. Low Impact Development Life Cycle Costing Tool. Accessed 22 November 2022. https://sustainabletechnologies.ca/lid-lcct/</ref>)]]

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*[[Rainwater Harvesting Cistern: Life Cycle Costs]]

*[[Rainwater Harvesting Cistern: Life Cycle Costs]]

*[[Vegetated Filter Strip: Life Cycle Costs]]

*[[Vegetated Filter Strip: Life Cycle Costs]]

<small>'''Note''': All practice cost estimates are based on a Contributing Drainage Area (CDA) of 2000 m², runoff control target of 25 mm depth (retention or treatment), and a drainage period of 72 hours. For infiltration practices, native soil infiltration rates for Full, Partial and No Infiltration Design scenarios were assumed to be 20 mm/h, 10 mm/h and 2 mm/h, respectively, and a safety factor of 2.5 was applied to calculate the design infiltration rate. Construction cost estimates assume the practice is built as part of an overall greenfield site construction project so do not include land value, equipment mobilization/demobilization costs, nor additional costs associated with retrofit/redevelopment scenarios.  Operation and maintenance (O&M) cost estimates assume annual inspections, removal of trash and debris twice a year, removal of sediment from pretreatment structures annually, and removal of weeds twice a year (where applicable). 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 (where applicable).</small>

<small>'''Note''': All practice cost estimates are based on a Contributing Drainage Area (CDA) of 2,000 m², runoff control target of 25 mm depth (retention or treatment), and a drainage period of 72 hours. For infiltration practices, native soil infiltration rates for Full, Partial and No Infiltration Design scenarios were assumed to be 20 mm/h, 10 mm/h and 2 mm/h, respectively, and a safety factor of 2.5 was applied to calculate the design infiltration rate. Construction cost estimates assume the practice is built as part of an overall greenfield site construction project so do not include land value, equipment mobilization/demobilization costs, nor additional costs associated with retrofit/redevelopment scenarios.  Operation and maintenance (O&M) cost estimates assume annual inspections, removal of trash and debris twice a year, removal of sediment from pretreatment structures annually, and removal of weeds twice a year (where applicable). 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 (bioretention, enhanced swales, permeable pavers and porous asphalt) or natural storm event testing (infiltration chambers and trenches).</small>

==Comparison of Life Cycle Costs by BMP Type==

==Comparison of Life Cycle Costs by BMP Type==

The following bar charts compare construction and life cycle cost estimates by LID BMP type for three main design scenarios: Full Infiltration Design; Partial Infiltration Design; and No Infiltration Design.  Design and O&M assumptions for each BMP type and scenario are as indicated in the above note.  All cost estimates generated by the LCCT have been divided by 2000 m² to produce values in Canadian dollars per square metre (CAD$/m²) of Contributing Drainage Area.  Cost estimates for a 2000 m² asphalt parking lot serviced by two catch basins and an oil and grit separator (OGS) are also provided for comparison.  

The following bar charts compare construction and life cycle cost estimates by LID BMP type for three main design scenarios: Full Infiltration Design; Partial Infiltration Design; and No Infiltration Design.  Design and O&M assumptions for each BMP type and scenario are as indicated in the above note.  All cost estimates generated by the LCCT have been divided by 2,000 m² to produce values in Canadian dollars per square metre (CAD$/m²) of Contributing Drainage Area.  Cost estimates for a 2,000 m² asphalt parking lot serviced by two catch basins and an oil and grit separator (OGS) are also provided for comparison.  

===Construction Cost Comparisons:===

===Construction Cost Comparisons:===

[[File:C.C 25mm Retention Partial Infiltration.png|thumb|left|400px|'''Construction Costs Per Unit Drainage Area (CAD$/m²) - Partial Infiltration Design, 25 mm Retention''']]

[[File:C.C 25mm Retention Partial Infiltration.png|thumb|left|400px|'''Construction Costs Per Unit Drainage Area (CAD$/m²) - Partial Infiltration Design, 25 mm Retention''']]

[[File:C.C 25mm Retention No Infiltration.png|thumb|center|400px|'''Construction Costs Per Unit Drainage Area (CAD$/m²) - No Infiltration Design, 25 mm Treatment''']]</br>

[[File:C.C 25mm Retention No Infiltration update.png|thumb|center|400px|'''Construction Costs Per Unit Drainage Area (CAD$/m²) - No Infiltration Design, 25 mm Treatment''']]</br>

<small>'''Note:''' Click on each image to enlarge to view associated construction cost comparison results.</small><br>

<small>'''Note:''' Click on each image to enlarge to view associated construction cost comparison results.</small><br>