Reducing Public Danger & Liability: An Abandoned Portal Closure Project

A group of teens entered an abandoned mine portal and posted their potentially deadly exploration on social media. MICON entrusted to mitigate the public danger permanently. Design of this civil mine closure project solution involved complex field factors, including:

  • Gravitational complications of pumping cement fill over a 380’ total elevation drop and over 1000 linear feet
  • 3 separate mine openings in a crumbling, unstable brick building
  • Intermittent low oxygen levels at flowable fill installation sites
  • Remote, steep terrain & dense vegetation

MICON successfully installed over 300 cubic yards of fast-setting cementious material truckloads to fill the portals and building. This required over 25 concrete mixer loads. Despite record heat that challenged the consistency and proper cure of both the pumping lines and final fill location, MICON completed the completed project ahead of schedule and on budget.