Infiltration practices cost components

Summary of infiltration practices cost components.
Link to this table

Implementation Stage	Primary Cost Components	Basic Cost Estimate	Other Considerations
Site Preparation	Tree & plant protection	Protection Cost ($/acre) * Affected Area (acre)	Removal of existing structures, topsoil removal and stockpiling
	Infiltration area protection	Silt fence cost ($/’foot) * Perimeter of infiltration area
	Clearing & grubbing	Clearing Cost ($/acre) * Affected Area (acre)
	Topsoil salvage	Salvage Cost ($/acre) * Affected Area
Site Formation	Excavation / grading	X-ft Depth Excavation Cost ($/acre) * Area (acre)	Soil & rock fill material, tunneling
	Hauling material offsite	Excavation Cost * (% of Material to be hauled away)
Structural Components	Vault structure (for underground infiltration)	($/structure)	Pipes, catchbasins, manholes, valves, vaults
	Media (for infiltration trenches)	Media cost ($/cubic yard) * filter volume (cubic yard)
	Geotextile	Geotextile cost ($/cy) * area of trench, including walls
	inlet structure	($/structure)
	Overflow structure	($/structure)
	Observation well	($/structure)
Site Restoration	Soil preparation	Topsoil or amendment cost ($/acre) * Area (acre)	Tree protection, soil amendments, seed bed preparation, trails
	Seeding	Seeding Cost ($/acre) * Seeded Area (acre)
	Filter strip	Sod cost ($/square foot) * filter strip area
	Planting / transplanting	Planting Cost ($/acre) * Planted Area (acre)
Annual Operation, Maintenance, and Inspection	Sediment removal	Removal Cost ($/acre) * Area (acre) * Frequency (1 time per 5 years)	Vegetation maintenance, cleaning of structures
	Debris removal	Removal Cost ($/acre) * Area (acre) * Frequency (2 time per year)
	Inspection	Inspection Cost ($) * Inspection Frequency (6 times per year)
	Mowing (for some vegetative filters)	Mowing Cost ($) * Mowing Frequency (6 times per year)