Mine Feature Closure and Backfilling

The contract involves the performance of machine backfilling to address subsidence features and sinkholes by importing durable rock material to stabilize and reclaim affected areas. This work includes perimeter excavation to delineate and prepare the boundaries of each feature, as well as the construction of access ramps to enable safe and efficient equipment movement and material delivery throughout the project. The scope is focused on long-term land stability and environmental remediation through the use of high-quality, resilient rock fill that meets specified engineering standards. This subcontract is issued under the NAICS code 238990, which classifies it as other specialty trade contractors, and is managed by the Colorado Division of Reclamation, Mining and Safety. The solicitation was posted on June 17, 2026, with a strict response deadline of June 23, 2026, requiring interested parties to submit proposals within a six-day window. The place of performance and specific site locations are not detailed in the provided data, but the work is expected to occur within Colorado under the oversight of the state agency responsible for mine reclamation and safety compliance. No set-aside provisions or organization type restrictions are indicated, making it open to eligible subcontractors regardless of size or certification status.