US Army Corps of Engineers
Official Publications of HQ USACE Website

Official Publications of the Headquarters

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

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



Our new website

We hope you like the look of our new website. We've tried to keep the same functionality our users are accustomed to and add some new features that will help you. 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 HQ Publication listed on this website, please contact us at Publication Change Request Form

If you have other questions concerning USACE, please contact