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<font size=3>'''Primary cost components for stormwater wetlands'''<br>
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Link to this [[Editing primary cost components for stormwater wetlands|table]]</font size>
 
<table class="sortable"><tr>
 
<table class="sortable"><tr>
 
<th>Implementation stage</th>
 
<th>Implementation stage</th>
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<tr>
 
<tr>
<td rowspan="3">Site preparation</td>
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<td rowspan="3"><center>Site preparation</center></td>
 
<td>Tree and plant protection</td>
 
<td>Tree and plant protection</td>
 
<td>Protection cost ($/acre) * affected area (acre)</td>
 
<td>Protection cost ($/acre) * affected area (acre)</td>
<td rowspan="3">Removal of existing structures, topsoil removal and stockpiling</td>
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<td rowspan="3"><center>Removal of existing structures, topsoil removal and stockpiling</center></td>
 
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<tr>
 
<tr>
<td>X</td>
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<td rowspan="2"><center>Site formation</center></td>
<td>X</td>
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<td>Excavation and grading</td>
<td>X</td><td>X</td>
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<td>4-foot depth excavation cost ($/acre) * area (acre)</td>
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<td rowspan="2">Soil and rock fill material, tunneling</td>
 
</tr>
 
</tr>
 
<tr>
 
<tr>
<td>X</td><td>X</td>
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<td>Hauling material off-site</td>
<td>X</td>
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<td>Excavation cost * (% of material to be hauled away)</td>
<td>X</td>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
<td>X</td><td>X</td>
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<td rowspan="2"><center>Structural components</center></td>
<td>X</td>
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<td>Inlet structure</td>
<td>X</td></tr>
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<td>($/structure)</td>
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<td rowspan="2"><center>Pipes, catch basins, manholes, valves</center></td>
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</tr>
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<tr>
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<td>Outlet structure</td>
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<td>($/structure)</td>
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</tr>
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<tr>
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<td rowspan="3"><center>Site restoration</center></td>
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<td>Soil preparation</td>
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<td>Soil cost ($/acre) * seeding/planting area (1 foot average depth per acre)</td>
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<td rowspan="3"><center>Tree protection, soil amendments, seedbed prepparation, trails</center></td>
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</tr>
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<tr>
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<td>Seeding (or sodding)</td>
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<td>Seeding cost ($/acre) * seeded area (acre)</td>
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</tr>
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<tr>
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<td>Planting/transplanting</td>
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<td>Planting cost ($/acre) * planted area (acre)</td>
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</tr>
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<tr>
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<td rowspan="7"><center>Annual operation, maintenance, and inspection</center></td>
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<td>Debris removal</td>
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<td>Removal cost ($/acre) * area (acre) * frequency (2 per year)</td>
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<td rowspan="7"><center>Vegetation maintenance, cleaning of structures</center></td>
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</tr>
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<tr>
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<td>Invasive plant removal</td>
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<td>Labor cost ($/hr) * time * frequency</td>
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</tr>
 
<tr>
 
<tr>
<td>X</td>
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<td>Sediment removal</td>
<td>X</td><td>X</td>
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<td>Removal cost ($/acre) * area (acre) * frequency (1 per 5 years)</td>
<td>X</td>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
<td>X</td>
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<td>Erosion repair</td>
<td>X</td>
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<td>Repair cost ($/acre) * area affected</td>
<td>X</td>
 
<td>X</td>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
<td>X</td>
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<td>Gate/valve operation</td>
<td>X</td>
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<td>Operation cost ($) * operation frequency (2 per year)</td>
<td>X</td>
 
<td>X</td>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
<td>X</td>
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<td>Inspection</td>
<td>X</td>
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<td>Inspection cost ($) * inspection frequency (2 per year)</td>
<td>X</td>
 
<td>X</td>
 
 
</tr>
 
</tr>
 
<tr>
 
<tr>
<td>X</td>
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<td>Mowing</td>
<td>X</td>
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<td>Mowing cost ($/acre) * mowing frequency (4 per year)</td>
<td>X</td>
 
<td>X</td>
 
 
</tr>
 
</tr>
 
</table>
 
</table>

Revision as of 19:29, 6 March 2013

Primary cost components for stormwater wetlands
Link to this table

Implementation stage Primary cost components Basic cost estimate Other considerations
Site preparation
Tree and plant protection Protection cost ($/acre) * affected area (acre)
Removal of existing structures, topsoil removal and stockpiling
Topsoil salvage Salvage cost ($/acre) * affected area (acre)
Clearing and grubbing Clearing cost ($/acre) * affected area
Site formation
Excavation and grading 4-foot depth excavation cost ($/acre) * area (acre) Soil and rock fill material, tunneling
Hauling material off-site Excavation cost * (% of material to be hauled away)
Structural components
Inlet structure ($/structure)
Pipes, catch basins, manholes, valves
Outlet structure ($/structure)
Site restoration
Soil preparation Soil cost ($/acre) * seeding/planting area (1 foot average depth per acre)
Tree protection, soil amendments, seedbed prepparation, trails
Seeding (or sodding) Seeding cost ($/acre) * seeded area (acre)
Planting/transplanting Planting cost ($/acre) * planted area (acre)
Annual operation, maintenance, and inspection
Debris removal Removal cost ($/acre) * area (acre) * frequency (2 per year)
Vegetation maintenance, cleaning of structures
Invasive plant removal Labor cost ($/hr) * time * frequency
Sediment removal Removal cost ($/acre) * area (acre) * frequency (1 per 5 years)
Erosion repair Repair cost ($/acre) * area affected
Gate/valve operation Operation cost ($) * operation frequency (2 per year)
Inspection Inspection cost ($) * inspection frequency (2 per year)
Mowing Mowing cost ($/acre) * mowing frequency (4 per year)