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Chapter 7
Construction BMPs
• For inlet inserts, is special equipment required to remove the insert? Is the insert material strong
enough to withstand tearing and/or collapse into the inlet, even when maintenance is less than ideal?
Perimeter Controls
• How is the perimeter control installed (e.g., trenching, staking)? Perimeter controls that are not
adequately secured may be subject to undercutting and washout.
• Is the material used in the perimeter control adequately durable for the life of the construction
project?
• How are vehicle tracking and site access controlled where flexible perimeter controls allow vehicles
to drive over the BMP?
Hydraulically Applied Products
• Does the product contain chemicals, pollutants, nutrients, or other materials that could adversely
impact receiving waters or groundwater?
• Has the product been adequately field tested under local conditions to ensure that the service life is
consistent with the manufacturer's representation?
• Does use of the product require special permits?
5.0 BMP Selection and Planning
Construction BMPs should be selected, designed, installed, and maintained based on site-specific
conditions. BMPs should be selected based on the physical layout and site conditions that will exist
during each stage of construction, because site conditions change through the various stages of
construction. The number of stages that must be addressed in the SWMP depends on the type of
construction activity and local jurisdiction requirements, but in general, three stages of erosion and
sediment control plans can be considered. These stages include initial clearing and grading; utility,
infrastructure and building construction; and final stabilization.
Effective construction site stormwater management planning involves the following:
• Collecting and analyzing site-specific information to identify needed erosion and sediment controls,
• Preparing a SWMP that specifies needed BMPs appropriate to each phase of construction, and
• Following the SWMP, maintaining BMPs and updating the SWMP as construction progresses.
This section focuses on important factors to consider in the development of a SWMP, including sitespecific
conditions, BMP functions, and other site-related plans.
5.1 Site Assessment
Early awareness of site-specific factors that make a site particularly prone to erosion problems can
prevent serious problems later during the construction process. A site assessment should include attention
to these factors, prior to selection of BMPs:
7-18 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3