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Looking at the pie charts below for each configuration we can see that they are all relatively close to being the same cost with a variation of a few hundred dollars between each over both a 25 and 50-year time horizon. The percentage of the [[Bioretention: Full infiltration|Full Infiltration]] configuration is greater than the other two due to the lesser cost of the overall installation for material and Installation, (no underdrains, no gravel storage layer or impermeable membrane, etc.).
Permeable pavements: Life Cycle Costs (view source)
Revision as of 17:22, 15 December 2022
, 1 year ago→Life Cycle Costs
==Life Cycle Costs==
==Life Cycle Costs==
Below are both the capital and life cycle costs of the three [[bioretention]] configuration practices over a 25 and 50-year time horizon based on a detailed assessment of local input costs, maintenance requirements, rehabilitation costs and design scenarios relevant to Canadian climates. The costs of maintenance and rehabilitation (Life cycle costs) are set at "Present Value" of these activities in 2022.
Below are both the capital and life cycle costs of the three [[permeable pavements|permeable pavement]] configurations over a 25- and 50-year time periods. horizon based on a detailed assessment of local input costs, maintenance requirements, rehabilitation costs and design scenarios relevant to Canadian climates. The costs of maintenance and rehabilitation (Life cycle costs) are set at "Present Value" of these activities in 2022. The estimates of maintenance and rehabilitation (life cycle) costs represent net present values (NPV). Operation and maintenance costs are predicted to represent between 18 to 20% of total life cycle costs over the 25-year evaluation period, and increase to between 36 to 29% of total life cycle costs over the 50-year period, due to costs associated with increased surface vacuuming, replacement of joint material after vacuuming, restriping, replacement of pavers and cleaning out underground pipes (underdrain and overflow) to prevent [[clogging]] assumed to be continually required after 25 years of operation.
===25-Year life cycle cost break down===
===25-Year life cycle cost break down===