Cost Components for Bioretention Practicesperformancea,e,f

Implementation Stage Primary Cost Components Basic Cost Estimate Other Considerations
Site Preparation Tree & plant protection Protection Cost ($/area) x Affected Area Removal of existing structures, topsoil removal and stockpiling
Clearing & grubbing Clearing Cost ($/area) x Affected Area Removal of existing structures, topsoil removal and stockpiling
Topsoil salvage Clearing Cost ($/area) x Affected Area Removal of existing structures, topsoil removal and stockpiling
Site Formation Excavation / grading 4-ft Depth Excavation Cost ($/acre) x Area (acre) Soil & rock fill material, tunneling
Hauling material offsite Excavation Cost x (% of Material to be hauled away) Soil & rock fill material, tunneling
Structural Components Under-drains Under-drain cost ($/lineal foot) x length of device Pipes, catch-basins, manholes, valves
Inlet structure ($/structure) or ($/curb cut) Pipes, catch-basins, manholes, valves
Outlet structure ($/structure) Pipes, catch-basins, manholes, valves
Liner Liner cost ($/square yard) x area of device) Pipes, catch-basins, manholes, valves
Site Restoration Filter strip Sod cost ($/square foot) x filter strip area Tree protection, soil amendments, seed bed preparation, trails
Soil preparation Topsoil or amendment cost ($/acre) x Area (acre) Tree protection, soil amendments, seed bed preparation, trails
Seeding Seeding Cost ($/acre) x Seeded Area (acre) Tree protection, soil amendments, seed bed preparation, trails
Planting / transplanting Planting Cost ($/acre) x Planted Area (acre) Tree protection, soil amendments, seed bed preparation, trails
Annual Operation, Maintenance, and Inspection Debris removal Removal Cost ($/acre) x Area (acre) x Frequency Vegetation maintenance, cleaning of structures
Sediment removal Removal Cost ($/acre) x Area (acre) x Frequency Vegetation maintenance, cleaning of structures
Weed control Labor cost ($/hour) x Hours per visit x Frequency Vegetation maintenance, cleaning of structures
Inspection Inspection Cost ($) x Inspection Frequency Vegetation maintenance, cleaning of structures
Mowing Mowing Cost ($) x Mowing Frequency Vegetation maintenance, cleaning of structures

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