# Construct Repository Cover to Support the Callahan Mine Superfund Site in Brooksville, Maine.

Canonical: https://abierto.us/opportunities/w912wj26ba008

- Solicitation number: W912WJ26BA008
- Notice type: Solicitation
- Status: Awarded to Sargent Corporation
- Department: Department of the Army
- Agency: Department of the Army
- Contracting office: W2SD Endist New England (W912WJ)
- NAICS: 562910 Remediation Services
- Product or service code: F108 Hazardous Substance Removal, Cleanup, and Disposal Services and Operational Support
- Set-aside: Total small business set-aside
- First posted: January 29, 2026
- Last posted: March 24, 2026
- SAM.gov: https://sam.gov/workspace/contract/opp/857dc24e221f469dbcd49c58d9a512bb/view

## Description

Construct Repository Cover to Support the Callahan Mine Superfund Site in Brooksville, Maine.The general scope of work for the proposed contract involves installing a composite cap over an area of approximately 13 acres. The purpose of the cap is to limit infiltration through mine waste remaining after historical copper mine operations performed on the property.

The mine waste consists of rock and rock-amended sediment previously consolidated and graded as part of recent and ongoing Superfund remediation activities. The expected components of the composite cap include in order from the surface: 12 inches crushed stone (3-inch minus), geocomposite drainage layer, 60-mil textured geomembrane (seam welded), and geofabric.

Other activities to be performed under this contract may include installation of drainage features (e.g., swales, culverts, etc.), grading, seeding and stabilization of disturbed areas outside stone cover system, stockpile management, and wetland improvements.

## Award on USAspending

- Recipient: Sargent Corporation (UEI FGX9G7T9D5C8)
- Contract: W912WJ26CA010, definitive contract
- Obligated: $5,414,000.00
- Competition: Full and Open Competition After Exclusion of Sources, 6 offers received
- Link: solicitation number W912WJ26BA008 equals the FPDS solicitation identifier; same awarding office W912WJ (high confidence)
- Record: https://www.usaspending.gov/award/CONT_AWD_W912WJ26CA010_9700_-NONE-_-NONE-/


## Publications

- January 29, 2026: Solicitation, due March 2, 2026 at 1:00 PM EST. Notice a5545aae062343d7a1d7b391dd6a5156. https://sam.gov/workspace/contract/opp/a5545aae062343d7a1d7b391dd6a5156/view
- February 20, 2026: Solicitation, due March 9, 2026 at 1:00 PM EDT. Notice 1de0bcc6c208466cb81a3c04ddd8c2f8. https://sam.gov/workspace/contract/opp/1de0bcc6c208466cb81a3c04ddd8c2f8/view
- February 27, 2026: Solicitation, due March 9, 2026 at 1:00 PM EDT. Notice 9d845bb2ce45476e833c6d6f975e6283. https://sam.gov/workspace/contract/opp/9d845bb2ce45476e833c6d6f975e6283/view
- March 2, 2026: Solicitation, due March 18, 2026 at 1:00 PM EDT. Notice 840fe91c95324bafacc952938a197325. https://sam.gov/workspace/contract/opp/840fe91c95324bafacc952938a197325/view
- March 4, 2026: Solicitation, due March 18, 2026 at 1:00 PM EDT. Notice a670bd5ac0cd47e59ffbe0ac976a386f. https://sam.gov/workspace/contract/opp/a670bd5ac0cd47e59ffbe0ac976a386f/view
- March 9, 2026: Solicitation, due March 18, 2026 at 1:00 PM EDT. Notice 961e2ebbc12147099de65a0decc40b29. https://sam.gov/workspace/contract/opp/961e2ebbc12147099de65a0decc40b29/view
- March 24, 2026: Solicitation, due March 18, 2026 at 1:00 PM EDT. Notice 857dc24e221f469dbcd49c58d9a512bb. https://sam.gov/workspace/contract/opp/857dc24e221f469dbcd49c58d9a512bb/view

## Points of contact

- Elizabeth Glasgow, elizabeth.k.glasgow@usace.army.mil, 9783188671

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Source: SAM.gov Contract Opportunities bulk extract and USAspending.gov award data. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/w912wj26ba008.