MSHA Close-call safety accident alert

MSHA has issued a close call safety alert following a dam overflow at a limestone mine.

A dam at a mining operation overtopped due to a significant rainstorm. The escaping water entered a mine portal and partially blocked entries, including the primary escapeway.

No miners were injured during this event. The close call accident occurred on August 22, 2017.

A dam at a mining operation overtopped due to a significant rainstorm. The escaping water entered a mine portal and partially blocked entries, including the primary escapeway

Best Practices

  • Maintain the pool at or below the established maximum normal pool elevation calculated by an engineer.
  • Ensure all decant pipes or open-channel spillways are structurally sound and free of obstructions
  • Ensure primary and backup pumps are regularly tested and there is adequate onsite fuel to operate the pumps. Regularly inspect all dams for signs of distress and promptly make repairs when necessary

MSHA standards 30 CFR §§56/57.20010 address retaining dams. They state, “If failure of a water or silt retaining dam will create a hazard, it shall be of substantial construction and inspected at regular intervals.” “Substantial construction” includes adequately maintaining the dam to safely retain the material behind it, even during large storms. Ensuring adequate freeboard, the vertical distance between the lowest point on the dam crest and the pool elevation, is a part of this maintenance.

Access the MNM’s Weekly Close Call Accident Alert here.

(Visited 103 times, 1 visits today)

Get involved

Register

As a member of this site you will be able to receive aggregates news relating only to those categories that are most relevant to you, submit job listings for FREE, post questions in the Q&A, and more.

Register Now

Feature your company

The Feature Your Company listing is your custom-made (by us) profile page that allows you to add any of the following content: text, videos, links, images. The page will also be listed on the Featured Company landing page. Over 560 unique aggregates users visit the site per day! Complete the enquiry form now to contact us.

Contact us

Jobs

Are you looking for an aggregate related job? Click here to see our jobs listing supplied by industry experts United Employment.

See Jobs

Advertise

Reach thousands of budget holders and decision makers by promoting your company on the longest established aggregate website in the US & Canada. Or advertise in our emails which are sent to opted-in subscribers according to their chosen categories. All advertising will display correctly on tablets and mobiles as this site is responsive.