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Construction BMPs
Construction BMPs
3.1.1 General SWMP Recommendations
• At a minimum, a SWMP should communicate and satisfy the following:
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Identify all potential sources of pollution which may affect the quality of stormwater discharges
associated with construction activity;
Describe the practices to be used to reduce the pollutants in stormwater discharges associated
with construction activity including the installation, implementation and maintenance
requirements; and
Be prepared in accordance with good engineering practices and be updated throughout
construction and stabilization of the site.
• Implement the provisions of the SWMP as written and updated, from commencement of construction
activity until final stabilization is complete. The SWMP typically requires additions or other
modifications once construction commences, and documentation of all modifications and
amendments is typically required by the construction stormwater permit. UDFCD recommends that
the contractor maintain records of all inspections, BMP maintenance, and communications with the
owner and/or engineer. This should be kept on-site, with the SWMP. UDFCD recommends that
these records be recognized as part of the SWMP but that changes to the practices identified in the
SWMP should not be made without the approval of an engineer.
• The SWMP should include additional discussion or plans for any special requirements of the site.
Special requirements include Spill Prevention Control and Countermeasure (SPCC) plans under
Section 311 of the Clean Water Act, or BMP programs otherwise required by another CDPS permit.
3.1.2 SWMP Elements
The SWMP should include the following as a minimum. When some sections are not applicable, include
a statement to that effect.
• Site Description: Clearly describe the construction activity, including:
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The nature of the construction activity at the site.
The proposed sequence for major activities.
Estimates of the total area of the site, and the area and location expected to be disturbed by
clearing, excavation, grading, or other construction activities.
A summary of any existing data used in the development of the site construction plans or SWMP
that describe the soil or existing potential for soil erosion.
A description of the existing vegetation at the site and an estimate of the percent vegetative
ground cover.
The location and description of all potential pollution sources, including ground surface
disturbing activities (see CDPHE Stormwater General Permit for description), vehicle fueling,
storage of fertilizers or chemicals, etc.
7-6 Urban Drainage and Flood Control District November 2010
Urban Storm Drainage Criteria Manual Volume 3