Cost components for bioretention practices

This table shows cost Components for Bioretention Practices
(Link to this table)

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