This Solicitation opportunity from Department Of Defense was posted on March 24, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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

Closed

W912WJ26BA008Federal

Submission Closed03/18/2026, 05:00:00 PM UTC

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

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NAICS: 562910

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about 18 hours ago

DEADLINE

in 28 days

AI Contract Overview

The contract entails the construction of a repository cover to support remediation efforts at the Callahan Mine Superfund Site in Brooksville, Maine. The primary task involves installing a composite cap over approximately 13 acres of mine waste left from historical copper mining operations. This composite cap is designed to reduce water infiltration through the consolidated and graded mine waste, which includes rock and amended sediment. The cap structure will consist of several layers: a 12-inch crushed stone surface layer, a geocomposite drainage layer, a 60-mil seam-welded textured geomembrane, and a geofabric layer beneath. Additional work covered by this contract may include installation of drainage features such as swales and culverts, site grading, seeding and stabilization of areas outside the stone cover, stockpile management, and wetland improvements to enhance environmental conditions. This solicitation is a total small business set-aside under NAICS code 562910, issued by the Department of Defense, specifically the W2SD Endist New England office located in Concord, Massachusetts. The contract was posted on January 29, 2026, with a response deadline of March 2, 2026. Interested parties may contact Elizabeth Glasgow for further information.

General Info

Construct composite cap over 13 acres of mine waste; includes drainage, grading, seeding, and environmental improvements.

Agency

Department Of Defense → W2SD Endist New England

Contract Value

$5,414,000

NAICS

562910 - Remediation Services

Place of Performance

Set-Aside

SBA

Awardee

SARGENT CORPORATION

Award Issued Date

05/06/2026, 12:00:00 AM UTC

Documents

Abstract of Offers - Construction W912WJ26BA008

award

Low

AI Contract Breakdown

Uniform Contract Format

Timeline

6 updates

PhaseClosed

PostedJan 29

Solicitation

Deadline changedFeb 20

Response deadline changed from Mar 2, 2026 to Mar 9, 2026.

Notice updatedFeb 27

Notice details unchanged. Attachments may have changed.

Deadline changedMar 2

Response deadline changed from Mar 9, 2026 to Mar 18, 2026.

Notice updatedMar 4

Notice details unchanged. Attachments may have changed.

Notice updatedMar 9

Notice details unchanged. Attachments may have changed.

Response DeadlineMar 18

Deadline has passed

Notice updatedMar 24

The notice description changed.

Submission Closed

03/18/2026, 05:00:00 PM UTC

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Organization & Contact Information

AgencyDepartment Of Defense → W2SD Endist New England

Contacts1 person available

OfficeCONCORD, MA, 01742-2751, USA

Organization / AgencyDepartment Of Defense → W2SD Endist New England

Office AddressCONCORD, MA, 01742-2751, USA

Contacts

Elizabeth Glasgow

contact@example.gov

+1 (555) 000-0000

Full 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.