This collection of publications is the single official repository for official U.S. Army Corps of Engineers (USACE) Engineering Regulations (ERs), Engineering Circulars (ECs), Engineering Manuals (EMs) and other official public documents originating from Headquarters USACE.

In order to read or print these documents, you must download the free Adobe Acrobat Reader available at http://www.adobe.com.

These publications are provided in secure portable document format (PDF). Our document security allows for reading, high resolution printing, and accessibility for the blind.

Test Report

Test Report 2

Website Update - Tuesday, May 20, 2025

Over the next few months, we are transitioning the collection of official publications to the Project Assistance Library (PAL). You can search for publications using the links below. You can learn more about PAL here. 

Please provide us feedback with your thoughts and ideas to better serve you. 

Having trouble finding what you are looking for? Not sure what you need or where to look? Ask a Librarian. We have the experts available to help you.

If you have a question about a specific USACE Publication, please contact us at hqpublications@usace.army.mil. 

Buffalo District - Cleveland Harbor