Colorado Regulatory Offices

Collapse All Expand All

Omaha District
9307 South Wadsworth Blvd.
Littleton, CO 80128
(303) 979-4120

Colorado West Regulatory Branch
Albuquerque District
1970 East 3rd Avenue, Suite 109
Durango, CO 81301-5025
(970) 259-1764

Durango Office email:

Albuquerque District
400 Rood Avenue, Room 224
Grand Junction, CO 81501
(970) 243-1199

Southern Colorado Regulatory Office
Albuquerque District
201 West 8th Street, Suite 350
Pueblo, CO 81003
(719) 543-9459



Public Notices

  • NWO-2020-02061-DEN

    Expiration date: 3/5/2022

    The City of Thornton is proposing to replace the York Street bridge over Big Dry Creek and modify the channel along 2,549 linear feet of Big Dry Creek. The channel modifications include realignment, reshaping, and bank and channel stabilization to create a multistage channel to convey flows. The existing York Street bridge will be replaced with a 200-foot-long bridge and the road will be reconstructed to 50 feet wide. Lastly, a portion of the Big Dry Creek Regional trail will be constructed at the northern portion of the bridge. The project, as proposed, would impact 2,549 linear feet (0.71-acre) of Big Dry Creek, 0.82-acre of adjacent wetlands, and 0.08-acre of open water.

  • Special Public Notice for Federal Register Notice

    Expiration date: 3/14/2026

    On December 27, 2021, the U.S. Army Corps of Engineers (Corps) published a final rule in the Federal Register (86 FR 73522) announcing the reissuance of 40 existing nationwide permits (NWPs) and one new NWP. These 41 NWPs will go into effect on February 25, 2022, and they will expire on March 14, 2026.

  • Joint Public Notice: Notice of Availability of the Beta Stream Flow Duration Assessment Method for the Western Mountains

    The U.S. Army Corps of Engineers (Corps), Sacramento, San Francisco, Los Angeles, and Albuquerque Districts (South Pacific Division), the Corps Omaha District, and the U.S. Environmental Protection Agency (EPA), Regions 6, 8, and 9 jointly announce the availability of the Beta Streamflow Duration Assessment Method (SDAM) for the Western Mountains (dated November 2021). The method is a rapid assessment tool to help distinguish between ephemeral, intermittent, and perennial streamflow at the reach scale. The SDAM may help in providing technical guidance for identifying waters that may be subject to regulatory jurisdiction under Section 404 of the Clean Water Act; however, this method does not imply or represent a change in the definition of “Waters of the U.S.”