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<td>Inspection Cost ($) x Inspection Frequency (6x / 1 yr)</td>
 
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Revision as of 19:16, 6 February 2013


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