13 September 2026: Updating Industry Day Attendance List to include the firm(s) shown in red. Reference Attachment "USACE OMAHA Malmstrom Utility Corridor Industry Day Updated Attendance List 13Sep26."

4 September 2026: The Industry Day slides and Attendance List are being attached with this update. See Attachments "USACE OMAHA Malmstrom Utility Corridor Industry Day Slides 4Sep26" and "USACE OMAHA Malmstrom Utility Corridor Industry Day Attendance List 4Sep26" for reference.

18 August 2026: The Sources Sought (attached) response date has been revised to 24 September 2026 to correctly reflect this notice.

14 August 2026: The Industry Day will be held virtually via Microsoft Teams on Friday, 4 September 2026 from 12:00 - 1:00 PM Central. Below is the link to register:

https://www.eventbrite.com/e/industry-day-for-sentinel-utility-corridor-at-malmstrom-afb-montana-tickets-1997975989970?aff=ebdssbdestsearch

11 August 2026: The attached Sources Sought estimated magnitude has been updated to between approximately $1.4B to $2.0B.

Please reference the attached Sources Sought and link to the Questionnaire (also included herein): https://forms.osi.apps.mil/r/PmqwFRQpQh

This notice will be updated when the Industry Day is available for registration.

Additional attachments include the Progressive Design-Build (PDB) with Other Transaction Authority (OTA) Playbook and Placemat to aid in understanding the acquistion process and procedures.