Changes

To read more about the specific design, operation and maintenance assumptions for each estimate, please see below:

To read more about the specific design, operation and maintenance assumptions for each estimate, please see below:

*[[LID LCCT: Bioretention]]

*[[Bioretention: Life Cycle Costs]]

*[[LID LCCT: Permeable Interlocking Concrete Pavers]]

*[[Permeable pavements: Life Cycle Costs]]

*[[LID LCCT: Porous Asphalt]]

*[[Porous Asphalt: Life Cycle Costs]]

*[[LID LCCT: Infiltration Trench]]

*[[Infiltration Trench: Life Cycle Costs]]

*[[LID LCCT: Infiltration Chamber]]

*[[Infiltration Chamber: Life Cycle Costs]]

*[[LID LCCT: Enhanced Swales]]

*[[Enhanced Swales: Life Cycle Costs]]

*[[LID LCCT: Rainwater Harvesting Cistern]]

*[[Rainwater Harvesting Cistern: 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 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>