Abandoned Mine Reclamation Glossary
743 terms total — 3 showing — Last updated 26 Oct 2026
Closure Financial Assurance
A regulatory mechanism requiring mining operators to establish monetary reserves or financial instruments sufficient to fund complete reclamation and long-term site management. The assurance amount is calculated based on detailed closure cost estimates and is held in escrow or bonded accounts.
Mine Portal Closure
The sealing or blocking of mine entrance openings to prevent unauthorized access, control ventilation, and contain under...
Mine Portal Closure Infrastructure
Physical structures and engineering controls installed at abandoned mine entrances to prevent unauthorized access, wildl...
Portal Closure
The process of sealing, capping, or otherwise securing an underground mine entrance to prevent unauthorized access and c...