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→Life Cycle Costs
==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.
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 approximately 40% 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.