Construction and Maintenance Costs Chapter 6 outlines a cost estimation method that site planners could use to compare the relative construction and maintenance costs for structural BMPs. These curves are excellent for purposes of comparison; however, it is recommended that construction and maintenance budgets should be based on site specific information. Once the construction plans are created, designers could use Table 12.BIO.5 and the cost estimation worksheet in Appendix D.

Table 12.BIO.5 lists the site components that are specific to bioretention practices. Not included in this table are those cost items that are common to all construction projects, such as mobilization, traffic control, erosion and sediment control, permitting, etc. A more detailed worksheet, utilizing 2005 construction prices, is contained in Appendix D.


Recommended maintenance activities for bioretention areas