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US Army Corps of Engineers

Omaha District Website

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Regulatory and Permitting Program

The Omaha District provides regulatory oversight for all or part of six states.

Regulatory Notice Archive

State Regulatory Offices

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Regulatory Office/ Permits

Littleton - (303) 979-4120

Regulatory Office/ Permits

Helena - (406) 441-1375
Billings - (406) 657-5910
Missoula - (406) 541-4845 X328

Regulatory Office/ Permits

Wehrspann (Omaha Area) - (402) 896-0896

Regulatory Office/ Permits

Bismarck - (701) 255-0015

Regulatory Office/ Permits

Pierre - (605) 224-8531

Regulatory Office/ Permits

Cheyenne - (307) 772-2300

Notice of Availability of the Beta Streamflow Duration Assessment Method for the Great Plains

Omaha District Regulatory Office

Published Sept. 28, 2022

Expiration date: 9/28/2023

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Streamflow Duration Assessment