image - a family of ducks at Pine Flat Lake

Public Notices

Under the Corps' Regulatory Program, a public notice is the primary method for advising all interested parties of a proposed activity for which a permit is sought. Soliciting comments and information necessary to evaluate the probable impacts on the public interest. Public notices are also published to inform the public about new or proposed regulations, policies, guidance or permit procedures.

Public Notices published by the Sacramento District under the Regulatory Program are posted on this page. Once a public notice is available on-line, an email notification is sent to individuals on the appropriate mailing list.

Comments are due by the expiration date of the public notice.  Only comments submitted by email or in hard copy format through a delivery service, such as the U.S. Postal Service, can be accepted.   Comments must be submitted to the address listed in the public notice.

Sign Up for Public Notices

Mailing lists are categorized by county and state. For instructions to be added to a Public Notice notification list, see

Special Public Notice: Applicability of the Clean Water Act 404(f)(1)(C) exemption for the construction or maintenance of irrigation ditches and the maintenance of drainage ditches within Colorado

Regulatory Division
Published March 25, 2021

SUBJECT: On July 24, 2020, the U.S. Army Corps of Engineers (Corps) and U.S. Environmental Protection Agency (EPA) issued a memorandum to the field regarding application of the exemptions under Section 404(f)(1)(C) of the CWA for the construction or maintenance of irrigation ditches and for the maintenance of drainage ditches. For purposes of implementing the ditch exemptions, the memo defines terms including “irrigation ditch” and “drainage ditch” and provides a framework for determining the applicability of the ditch exemptions and the recapture provision in CWA Section 404(f)(2). The memorandum provides a clear, consistent approach regarding the application of the exemptions, superseding prior national guidance.

DESCRIPTION: The fact sheet identifies the specifics relating to how this memorandum affects the Corps’ Regulatory Program in Colorado and where to find more information.

Ditch Memo Fact Sheet