This section includes information on Construction, Erosion Control Supervisors /SWMP Administrators, and Regional Erosion Control Assessment Team


Inlet protection at a construction site

CDOT starts construction after a CDOT project has been planned and designed and the stormwater management plan (SWMP) has been developed. CDOT's Water Quality Program staff strive to ensure that CDOT construction projects do not contribute to stormwater runoff by making sure that all water quality permits, certifications, spill containment and countermeasure plans , and the stormwater management plan are followed. Erosion Control Supervisors/SWMP Administrators are required for each construction site with a permit. The Regional Erosion Control Assessment Team (RECAT) conducts inspections of the project site to ensure compliance with the permit.

Erosion Control / SWMP

Rock check dams at a construction site

Every construction site is required to have an assigned Erosion Control Supervisor (ECS)/Stormwater Management Plan (SWMP) Administrator. The ECS is a person who is critical in making sure stormwater quality is protected at all times at the construction site. The ECS/SWMP Administrator is not the superintendent, unless otherwise approved by the engineer. The contractor shall assign an employee to the project to serve as the ECS/SWMP Administrator. ECS/SWMP Administrator responsibilities include:

1) Ensuring compliance with all water quality permits or certifications in effect during the construction work;

2) Administering and amending the stormwater management plan (SWMP), making sure that the plan is followed and reflects construction site conditions at all times; See subsection 208.03c 9.

RECAT Inspections

Concrete Washout Station

Regional Erosion Control Assessment Team (RECAT) Inspections

The primary objective of the RECAT program is to perform inspections of construction projects in order to ensure compliance with permits. RECAT inspections are performed by trained CDOT staff. The RECAT program works to prevent, identify and resolve stormwater management issues associated with construction activities. A typical RECAT inspection includes the following:

  • Notification-Notification of a RECAT inspection is no more than 2 working days before the site visit;
  • Pre-inspection meeting-The purpose of the pre-inspection meeting is to communicate the objectives for the RECAT inspection and provide the project personnel with an opportunity to communicate project status, progress, and challenges associated with the project. During the meeting, the stormwater management plan (SWMP) notebook will be reviewed. Administrative findings are identified at the end of the pre-inspection meeting;
  • Field inspection-The construction site perimeter, all disturbed areas, material and/or waste storage areas that are exposed to precipitation, stormwater discharge location, and locations where vehicles access the site are inspected for evidence of, or the potential for, pollutants leaving the construction site, entering the stormwater drainage system, or discharging to state waters. All erosion and sediment control practices identified in the SWMP are evaluated to ensure that they are maintained and operating correctly;
  • Post-inspection meeting-The RECAT team meets with the project personnel to discuss the issues identified and provide guidance regarding remedies. During the post-inspection meeting, the team also provides the project personnel with a list of action items that must be started immediately. Evidence of completion of the action items must be submitted to the RECAT inspectors within 3 business days;
  • Distribute summary of corrective actions and assessment report-The RECAT assessment report provides further clarification of and the basis for the corrective actions communicated during the inspection. The report is prepared and delivered to the CDOT Project Manager within 2 working days of the inspection; and
  • Corrective actions-Corrective actions need to be addressed as soon as possible, immediately in most cases.
Report an Illegal Discharge
  • Hotline: 303-512-4H2O

  • Illegal discharges (aka, illicit discharges) emit into CDOT's storm drain system pollutants (e.g., oil, grease, fertilizers, pesticides, grass clippings, leaves, or odd smelling/colored substances).

    Learn more.
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