Changes

==Life Cycle Costs==

==Life Cycle Costs==

Below are capital and life cycle cost estimates for the three [[bioretention]] configurations over 25- and 50-year time periods. The estimates of maintenance and rehabilitation (life cycle) costs represent net present values. Operation and maintenance costs are predicted to represent between 25 and 30% of total life cycle costs over the 25-year evaluation period, and increase to between 38 and 46% of total life cycle costs over the 50-year period, due to filter media bed rehabilitation costs assumed to be required after 25 years of operation.  

Below are capital and life cycle cost estimates for the two [[Infiltration trenches|infiltration trench]] configurations over 25- and 50-year time periods. The estimates of maintenance and rehabilitation (life cycle) costs represent net present values. Operation and maintenance costs are predicted to represent between 25 and 30% of total life cycle costs over the 25-year evaluation period, and increase to between 38 and 46% of total life cycle costs over the 50-year period, due to filter media bed rehabilitation costs assumed to be required after 25 years of operation.  

 

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

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

[[File:25yr LCCT Bio Full Infil.PNG|thumb|left|400px|'''Bioretention: Full infiltration''']]

[File:25yr LCCT InfilTrench Full Infil.PNG|thumb|left|630px|'''Infiltration Trench: Full Infiltration''']]

 

[[File:25yr LCCT Bio No Infil.PNG|thumb|right|400px|''' Bioretention: Non-infiltrating''']]

[[File:25yr LCCT Bio Partial Infil.PNG|thumb|center|400px|'''Bioretention: Partial infiltration''']]

[[File:25yr LCCT InfilTrench Partial Infil.PNG|thumb|center|630px|'''Infiltration Trench: Partial Infiltration''']]