Infiltration practices cost components 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)