Under section 404 of the Clean Water Act, anyone who proposes an activity that would discharge dredged or fill material into waters of the United States is required to apply for a permit from the U.S. Army Corps of Engineers. Choose a web or document link below to learn more about the Clean Water Act, related guidance, and how it affects wetlands and CDOT transportation projects. Also included are CDOT/FHWA policy and procedure documents related to transportation project development and aquatic resource protection.


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CDOT Wetland Program Cheat Sheet

Programmatic Wetland Finding Approval MOA, 2019

Programmatic Wetland Finding Template, 2019 (Required)

Non-Programmatic Wetland Finding Checklist, 2010

NEPA / 404 Merger Process and Agreement for Transportation Projects (2019 Revision)

Preservation of the Nation's Wetlands, Department of Transportation Order 5660.1A, 1978

23 CFR Part 777 - Federal Highway Administration Mitigation of Impacts to Wetlands and Natural Habitat

Technical Advisory T6640.8A - Federal Highway Administration Guidance for Preparing and Processing Environmental and Section 4(f) Documents


*NEW* Navigable Waters Protection Rule (aka. definition of waters of the U.S.)
          EPA Fact Sheet

2017 Reissuance of Nationwide Permits:
          Public Notice regarding 2017 Nationwide Permits
          Summary of the 2017 Nationwide Permits

Regional General Permit 37, Stream Stabilization Projects in Colorado

40 CFR Part 230 - Compensatory Mitigation for Losses of Aquatic Resources; 2008 Final Rule 

Minimum Standards For Acceptance of Aquatic Resource Delineation Reports - Sacramento District, January 2016

Regional Compensatory Mitigation and Monitoring Guidelines - South Pacific Division, 2015

Regulatory Guidance Letter No. 08-03, Minimum Monitoring Requirements for Compensatory Mitigation

Clean Water Act Exemptions:

Ditch Exemption - exemptions for construction or maintenance of irrigation ditches and maintenance of drainage ditches under section 404 of Clean Water Act

Maintenance Exemption - certain discharges for the maintenance, including emergency reconstruction of recently damaged parts, of currently serviceable structures such as riprap, bridge abutments or approaches, and transportation structures

Colorado: The Official State Web Portal