Summary of Annual BMP Maintenance Costs from Estimator Models Summary of Annual BMP Maintenance Costs from Estimator Models

Summary of Annual BMP Maintenance Costs from Estimator Models
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BMP	USEPA (1999) As percent of construction cost(💲)	Weiss et al. (2005) As percent of construction cost(💲)	Wossink et al., (2003) C = Cost(💲) X = size of watershed(acre)
Constructed Wetlands	2%	4% - 14.2%	C = 4,502X0.153
Wet Detention Basins	Not reported	1.9% - 10.2%	C = 4,502X0.153
Infiltration Trenches	5% - 20%	5.1% – 12.6%	Not reported
Bioretention Basins	5% - 7%	0.7% - 10.9%	C = 3,437X0.152
Infiltration Basins	1% - 10%	2.8% - 4.9%	Not reported
Dry Ponds	<1%	1.8% - 2.7%	Not reported
Sand Filters	11% -13%	0.9% - 9.5%	C = 10,556X0.534