Amendment 3:

Amendment 2 - The purpose of this amendment is as follows: 1. Revised Site Visit Information (Clause 52.236-27). All other terms and conditions remain unchanged.

Amendment 1- The purpose of this amendment is as follows: 1. Revised drawings/specifications (see Summary of Changes, dated 02-13-26). 2. Proposal due date is extended to 03/31/2026, 2:00 PM CST. All ... Amendment 1- The purpose of this amendment is as follows: 1. Revised drawings/specifications (see Summary of Changes, dated 02-13-26). 2. Proposal due date is extended to 03/31/2026, 2:00 PM CST. All other terms and conditions remain unchanged.

This project involves constructing five new pre-engineered metal Environmental Protection Shelters, each approximately 20,000 square feet, along with associated paving and three small maintenance kiosks at Ellsworth Air Force Base in South Dakota. The shelters are designed to house and maintain B-2A Spirit aircraft and must be coordinated with other adjacent B-21 construction projects.

Updated 30 Dec 2025: Please reference the updated document attached.