Difference between revisions of "Cost considerations for dry swale (grass swale)"
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[[Process for selecting Best Management Practices#Using cost factors to select BMPs|Cost estimates]] that site planners can use to compare the relative construction and maintenance costs for structural best management practices are excellent for purposes of comparison. However, it is recommended that construction and maintenance budgets should be based on site specific information. Utilizing the table below and cost estimation worksheets will allow designers to more accurately estimate the cost of a filtration BMP. | [[Process for selecting Best Management Practices#Using cost factors to select BMPs|Cost estimates]] that site planners can use to compare the relative construction and maintenance costs for structural best management practices are excellent for purposes of comparison. However, it is recommended that construction and maintenance budgets should be based on site specific information. Utilizing the table below and cost estimation worksheets will allow designers to more accurately estimate the cost of a filtration BMP. | ||
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| + | {{alert|The following table is generally applicable to filtration BMPs and not specifically to swales. Some items may not be applicable.|alert-info}} | ||
{{:Cost components for filtration practices}} | {{:Cost components for filtration practices}} | ||
Revision as of 15:39, 11 April 2018
Cost estimates that site planners can use to compare the relative construction and maintenance costs for structural best management practices are excellent for purposes of comparison. However, it is recommended that construction and maintenance budgets should be based on site specific information. Utilizing the table below and cost estimation worksheets will allow designers to more accurately estimate the cost of a filtration BMP.
Information: The following table is generally applicable to filtration BMPs and not specifically to swales. Some items may not be applicable.
Cost components for filtration practices.
Link to this table
| Implementation Stage | Primary Cost Components | Basic Cost Estimate | Other Considerations |
|---|---|---|---|
| Site Preparation | Tree & plant protection | Protection Cost ($/acre) x Affected Area (acre) | Removal of existing structures, topsoil removal and stockpiling |
| Topsoil salvage | Salvage cost ($/acre) x Affected Area (acre) | ||
| Clearing & grubbing | Clearing Cost ($/acre) x Affected Area (acre) | ||
| Site Formation | Excavation / grading | X-ft Depth Excavation Cost ($/acre) x Area (acre) | Soil & rock fill Hauling material material, tunneling |
| Hauling material offsite | Excavation Cost x (% of Material to be hauled away) | ||
| Structural Components | Under-drains | Under-drain cost ($/lineal foot) x length of device | Pipes, catchbasins, manholes, valves, vaults |
| Vault structure (for media filters) | ($/structure) | ||
| Media (for media filters) | Media cost ($/cubic yard) X filter volume (cubic yard) | ||
| Inlet structure (for vegetative filters | ($/structure) | ||
| Outlet structure (for vegetative filters) | ($/structure) | ||
| Site Restoration | Filter strip | Sod cost ($/square foot) x filter strip area | Tree protection, soil amendments, seed bed preparation, trails |
| Soil preparation | Topsoil or amendment cost ($/acre) x Area (acre) | ||
| Seeding | Seeding Cost ($/acre) x Seeded Area (acre) | ||
| Planting / transplanting | Planting Cost ($/acre) x Planted Area (acre) | ||
| Annual Operation, Maintenance, and Inspection | Debris removal | Removal Cost ($/acre) x Area (acre) x Frequency (2x / 1yr) | Vegetation maintenance, cleaning of structures |
| Sediment removal | Removal Cost ($/acre) x Area (acre) x Frequency (1x / 5yr) | ||
| Gate / valve operation | Operation Cost ($) x Operation Frequency (2x / 1 yr) | ||
| Inspection | Inspection Cost ($) x Inspection Frequency (6x / 1 yr) | ||
| Mowing (for some vegetative filters) | Mowing Cost ($) x Mowing Frequency (4x / 1 yr) |
Related pages
- Terminology for swales (grass channels)
- Overview for dry swale (grass swale)
- Types of infiltration
- Types of filtration
- Design criteria for dry swale (grass swale)
- Construction specifications for dry swale (grass swale)
- Operation and maintenance of dry swale (grass swale)
- Assessing the performance of dry swale (grass swale)
- Calculating credits for dry swale (grass swale)
- Cost considerations for dry swale (grass swale)
- Case studies for dry swale (grass swale)
- Plants for swales
- Check dams for stormwater swales
- External resources for dry swale (grass swale)
- References for dry swale (grass swale)
- Requirements, recommendations and information for using dry swale (grass swale) without an underdrain in the MIDS calculator
- Requirements, recommendations and information for using dry swale (grass swale) with an underdrain in the MIDS calculator
- Requirements, recommendations and information for using swale side slope as a BMP in the MIDS calculator