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Chapter 7
Construction BMPs
Table 7-1. Comparison of State and Local Construction-Phase Stormwater Permits in Colorado
State
Nomenclature • Colorado Discharge Permit
System (CDPS) General
Permit for Stormwater
Discharges Associated with
Construction Activities
• CDPS Individual Permit for
Stormwater Discharges
Associated with Construction
Activities
Triggers • Area of potential disturbance
is greater than one acre
(This area includes
construction activities that are
part of a larger common plan
of development or sale.
Areas used for staging,
materials storage, temporary
construction site access, offsite
borrow areas and other
construction related activities
should also be included.)
Required Items • Application
• Stormwater Management
Plan (SWMP). In other parts
of the country, this may be
referred to as a Stormwater
Pollution Prevention Plan
(SWPPP)
Local Government
(programs vary, not inclusive)
• Construction Activities Stormwater
Discharge Permit (CASDP)
• Grading, Erosion, and Sediment Control
Permit (GESC)
• Grading Permit
• Land Disturbance Permit
• Sewage Use and Drainage Permit (SUDP)
• State Construction Phase Stormwater Permit
required
• Potential for erosion based on site
characteristics (i.e. steep topography, highly
erodible soils)
• Contaminated soils on site
• Sites within a designated 100-year floodplain
and/or proximity to active waterway
• Application
• SWMP with requirements that frequently
exceed the requirements listed in the state
permit
• Fee
• Annual Fee
3.1 Preparing and Implementing a Stormwater Management Plan (SWMP)
A SWMP should be developed prior to construction and kept current for the duration of construction.
This section includes recommendations for SWMP preparation and BMP inspection, maintenance and
removal.
November 2010 Urban Drainage and Flood Control District 7-5
Urban Storm Drainage Criteria Manual Volume 3