B-21 West Alert Apron Environmental Protection Shelters at Ellsworth Air Force Base (AFB), South Dakota (SD)
Closed Solicitation Posted
- Solicitation number
- W9128F26RA004
- Agency
-
ENDIST Omaha
US Army Corps of Engineers, Department of Defense
- Responses due
- Set-aside
- No set-aside
Opportunity facts
- NAICS code
- 236220 Commercial and Institutional Building Construction
- Place of performance
- Ellsworth Air Force Base (AFB), South Dakota (SD)
- Points of contact
Notice details come from SAM.gov. Updated .
About this opportunity
The Department of the Army Corps of Engineers Engineering District Omaha seeks design and construction of seven Environmental Protection Shelters (each approximately 20,000 square feet) at Ellsworth Air Force Base, South Dakota, with revised pricing due May 27, 2026. The procurement carries no set-aside.
Place of performance is 336 Main Gate Road, Box Elder, South Dakota 57719. The shelters are sized to accommodate B-2A Spirit aircraft with space for general aircraft maintenance. The project includes two maintenance kiosks (approximately 160 square feet each), airfield and ground support equipment paving, blast deflectors, PL-3 boundary fencing and lighting, and an entry control point. Construction must comply with AFI 16-1404 requirements. NAICS code 236220 applies (Commercial and Institutional Building Construction); PSC Y1BZ covers Construction of Other Airfield Structures. Wage determinations SD20260001 and SD20260029 (both dated May 18, 2026) apply.
The solicitation has undergone nine amendments since posting on January 22, 2026. Amendment 8 (May 18, 2026) established the current revised pricing deadline of May 27 at 2:00 PM CT. Amendment 9 clarifies that only offerors who submitted proposals by the original April 20 deadline may submit revised pricing. Earlier amendments extended the proposal deadline from March 17 through April 20, revised wage determinations, updated specifications and drawings, and added a mandatory site visit roster. Amendment 1 increased the quantity for Option CLIN 9 from 20 to 250 units.
Notice text
10 versions
Update #10 · Latest ·
Amendment 9: The purpose of this amendment is as follows: 1. Revised pricing is due by 2:00 PM CT on 05/27/26 - only for those offerors who submitted a proposal in compliance with the original deadline of 04/20/26. Original proposals were due by 2:00 PM CT on 04/20/26. All other terms and conditions remain the same.
Update #9 ·
Amendment 8: The purpose of this amendment is as follows: 1. Wage Determination Updates (SD20260001, SD20260029 - both dated 05/18/26. 2. Revised Pricing is due 05/27/26. All other terms and conditions remain the same.
Update #8 ·
Amendment 7: The purpose of this amendment is as follows: 1. Clause Updates. All other terms and conditions remain the same.
Update #7 ·
Amendment 6: The purpose of this amendment is as follows: 1. Updates to Drawings/ Specs (see Summary of Changes, dated 04-13-26) 2. Proposal Due Date extended to 04/20/26 at 2:00 PM CT. All other terms and conditions remain the same.
Update #6 ·
Amendment 5: The purpose of this amendment is as follows: 1. Revised Drawings/Specs (see Summary of Changes, dated 03-30-26). All other terms and conditions remain the same.
Update #5 ·
Amendment 4: The purpose of this amendment is as follows: 1. Revised Drawings/Specs (see Summary of Changes, dated 03/18/26) 2. Revised 00 21 00 (see 00 21 00, dated 03/18/26) 3. Proposal Due Date extended to 04/14/26 at 2:00 PM CT. All other terms and conditions remain the same.
Update #4 ·
Amendment 3: The purpose of this amendment is as follows: 1. The proposal due date is extended to 03/31/26 at 2:00 PM CST. 2. Revised 00 21 00 (see 00 21 00, dated 03-09-26), 3. Revised 00 22 00 (see Summary of Changes, dated 03-09-26). All other terms or conditions remain the same.
Update #3 ·
Amendment 2: The purpose of this amendment is as follows: 1. Revised 00 21 00 (see 00 21 00, dated 02-12-26), 2. Revised drawings/specifications (see Summary of Changes, dated 02-12-26), All other terms or conditions remain the same.
Update #2 ·
Amendment 1: The purpose of this amendment is as follows: 1. Revised 00 21 00 (see 00 21 00, dated 05 FEB 2026), 2. Revised 00 22 00 (see 00 22 00, dated 05 FEB 2026), 3. Wage Determination SD20260032 has been made inactive and replaced with SD20260001 (see Wage Determination SD20260001, dated 30 JAN 2026), 4. Revised drawings/specifications (see Summary of Changes, dated 04 FEB 2026), 5. Added Site Visit Roster (see Site Visit Roster, dated 03 FEB 2026, 6. Revised Quantity for Option CLIN 9 from 20 to 250, 7. Proposal due date is extended to 17 MAR 2026, 2:00 PM CST, All other terms or conditions remain the same.
Update #1 ·
B-21 West Alert Apron Environmental Protection Shelters (EPS), Ellsworth Air Force Base (EAFB), South Dakota (SD).This project will provide seven (7) new pre-engineered metal Environmental Protection Shelters (EPSs), approximately 20,000 SF each. EPSs are sized to fit the B-2A ?Spirit? aircraft with space to perform general aircraft maintenance. The project also includes associated airfield and ground support equipment (GSE) paving. Supporting facilities include two (2) maintenance kiosks, approximately 160 SF each, providing electrical and communication infrastructure to the EPSs. Additional site features include blast deflectors, PL-3 boundary fencing and lighting, and an entry control point (ECP). This project will include a space or spaces constructed to AFI 16-1404 requirements.
Notice history
| Notice | Type | Posted |
|---|---|---|
| This notice | Solicitation | |
| B-21 West Alert Apron Environmental Protection Shelters at Ellsworth Air Force Base (AFB), South Dakota (SD) | Pre-Solicitation |
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