U.S. Department of the Interior

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The National Mine Map Repository's servers and office space are currently undergoing maintenance. We are unable to fulfill mine map requests at this time. In the meantime, please refer to the resources on our links page.

Questions? Concerns? Email Brianne Cassidy at Thank you for your patience.

"Preserving Mine Maps for Future Generations"


The NMMR acquires maps through a vigorous outreach program directed at the public and state and federal environmental agencies. Other sources include:

  • Mining companies
  • Engineering and consulting firms
  • Surveying companies
  • Universities
  • Private citizens

We are always looking for donations of mine maps to add to our microfilm/digital collection. If you have mine maps you would like to donate see the contact information below.

When maps are received from a donor they are scanned and converted to microfilm, and placed in the archive. The maps, along with a scanned images are returned to the donor. Please don't hesitate to contact the Repository if you have any questions or wish additional information.

NMMR Procedures:

As maps are obtained at the Repository, they are assigned a unique six-digit identification number (document number). Data sheets are prepared for each map giving all available information including: map document number; state; county; mine name; mine ID number (MSHA); company name; mine type; and the Universal Transverse Mercator (UTM) grid zone, and the latitude and longitude of the geo-located point on the map. This information is input into the Mine Map Index System. The maps are then scanned into a digital format and stored on the Repository's dedicated 42 terabyte mass storage array. The digital files are converted to microfilm for permanent storage in our archive.


Office of Surface Mining Reclamation and Enforcement Disclaimer: Mine maps within the Office of Surface Mining Reclamation and Enforcement (OSMRE), National Mine Map Repository (NMMR) are not guaranteed to be accurate, correct, or complete.

All maps in the NMMR have been donated to the OSMRE.  The information contained therein cannot be verified and so cannot be guaranteed.

OSMRE’s inability to guarantee includes, but is not limited to, the following:

  • The accuracy of the mine maps within the NMMR.
  • The reliability of findings based upon data from the maps.
  • The reliability of findings from digital mapping programs.
  • The completeness of the maps, as they may not reflect prior or more recent mining.
  • The accuracy of any georeferenced mine maps found in the NMMR.


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