Infiltration trench and infiltration basin cost estimate worksheet.
Link to this table

Project Title
Owner
Location
Project Number
Date
Description Units Quantity Unit Cost Total Estimated Price
Site Preparation
Tree removal - up to 12" diameter each $350.00 $0.00
Clear and grub brush square yard $1.50 $0.00
Tree protection - temp. fence lineal foot $3.00 $0.00
Infiltration area protection - silt fence lineal foot $2.00 $0.00
Topsoil - 6" depth, salvage on site square yard $4.50 $0.00
Site Formation
Excavation - 6' depth square yard $8.00 $0.00
Grading square yard $1.50 $0.00
Hauling off-site - 6' depth square yard $10.00 $0.00
Structural Components
Inlet structure each $1,500.00 $0.00
Multi-stage outlet structure each $2,500.00 $0.00
Site Restoration
Sod filter strip lineal foot $1.50 $0.00
Soil preparation square yard $5.00 $0.00
Seeding - above outlet elevation square yard $0.50 $0.00
Planting - below outlet elevation square yard $30.00 $0.00
Mulch square yard $2.00 $0.00
Subtotal $0.00
10% Contingencies $0.00
Subtotal $0.00
Apply MN Location Factor $0.00
TAL CONSTRUCTION COST $0.00
Annual Operation and Maintenance
Replace planting media square yard $12.00 $0.00
Debris removal per visit $50.00 $0.00
Mow filter strips per visit $50.00 $0.00
Sediment removal per year $500.00 $0.00
Replace plants per plant $5.00 $0.00
Erosion repair square yard $75.00 $0.00
Gate / valve operation per visit $125.00 $0.00
Inspection per visit $125.00 $0.00
Subtotal $0.00
Apply MN Location Factor $0.00
TOTAL ANNUAL O&M COST $0.00
Minnesota Location Factors
Bemidji 0.963
Brainerd 1.003
Detroit Lakes 0.962
Duluth 0.991
Mankato 0.990
Bemidji 0.963
Minneapolis 1.035
Rochester 0.983
St. Paul 1.000
St. Cloud 1.002
Thief River Falls 1.042
Willmar 0.961
Windom 0.935

Note: Suggested unit costs are based on RS Means prices for Spring, 2005, then factored into an area basis based on typical design features for Constructed Wetlands BMPs. To be used for preliminary cost estimation

This page was last edited on 15 July 2015, at 15:04.

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