OFFICE of SURFACE MINING
RECLAMATION and ENFORCEMENT

U.S. Department of the Interior

National Mine Map Repository (NMMR) Logo

National Mine Map Repository

"Preserving Mine Maps for Future Generations"


About National Mine Map Repository

Celebrating 50 years of Mapping!

Mining and mapping have changed a lot over the past 50 years. Hand drawn mine maps from the 1800s have been replaced by three-dimensional computer-drafted models. Layering transparencies over topographic maps has been replaced by GIS.

Grid drawn across an anthracite field so users could determine which mine map to retrieve (pre-GIS).

Grid drawn across an anthracite field so users could determine which mine map to
retrieve (pre-GIS).

OSMRE's NMMR booth display at the American Exploration and Mining Association conference.

OSMRE's NMMR booth display at the American Exploration and Mining Association conference.

OSMRE NMMR Specialist poses with bituminous coal in Indiana County, PA.

OSMRE NMMR Specialist poses with bituminous coal in Indiana County, PA.



OSMRE's National Mine Map Repository Celebrates 50 years of mapping.

The Federal Coal Mine Health and Safety Act (the Coal Act) of 1969 was signed into law by President Richard Nixon on December 30, 1969. The law established a mine map repository, which later became known as the National Mine Map Repository (NMMR), to maintain and archive every closed and abandoned mine map within the United States. The NMMR, which became part of the Office of Surface Mining Reclamation and Enforcement (OSMRE) in 1982, is the only federal program of its kind in the nation. NMMR's mission is to provide federal, state and local partners as well as private industry with the best geographic data on old mines. NMMR's archived maps help communities avoid health and safety risks and aid in making informed economic and land use decisions.

Over the past 50 years, the NMMR has collected and archived over 150,000 mine maps. The collection includes everything from bituminous and anthracite coal to garnet and gold. Though the NMMR still keeps copies of its collection on microfilm, film cameras have been replaced by some of the world's largest digital art scanners. These scanners capture every detail on these one-of-a-kind maps, from a common eraser mark to a random loose thread.

Throughout 2020, OSMRE's National Mine Map Repository will be celebrating 50 years by sharing its history, accomplishments, and plans for the future.


Mission Statement

The National Mine Map Repository (NMMR), established by the Federal Coal Mine Health and Safety Act of 1969, is charged with maintaining an archive of all closed and abandoned mine maps from throughout the United States. Through its expert analysis of mine maps and related information, the NMMR assists both the private and public sectors in evaluation of related data for economic evaluation, risk assessment, industrial and commercial development, highway construction, and the preservation of public health, safety and welfare. The NMMR strives to increase public use and accessibility of its unique information by transforming its archive into digital georeferenced media.

Home screen capture for the National Mine Map Repository story map.

Telling Our Story

The NMMR Story Map was created by the Office of Surface Mining Reclamation and Enforcement (OSMRE) to illustrate the story of the NMMR and its mission.

Follow us on Twitter @minemaps!
[Text-Only Story Map Version]


What is the National Mine Map Repository

The National Mine Map Repository (NMMR) is part of the United States Department of the Interior, Office of Surface Mining Reclamation and Enforcement (OSMRE). The NMMR is located in Green Tree, Pennsylvania, and collects and maintains both coal and non-coal mine map information and images for the entire country. Our facility provides and stores, in microfilm, over 181,000 abandoned mine maps, with workings dating from the 1790s to the present day. It serves as a point of reference for mine maps and other information for both surface and underground mines throughout the United States. It also serves as a location to retrieve mine maps in an emergency. The NMMR provides our customers with services ranging from evaluating related data for economic analysis to assessing their potential risk associated with underground mining. Through our analysis of mine maps and related information, we assist both the private and public sectors in industrial and commercial development, highway construction, and the preservation of public health, safety and welfare. In addition, we collect, reproduce, and maintain a national inventory of mine maps and supporting documentation for private and public interests.

The NMMR is part of the Technology Support Division in the Appalachian Regional Office of OSMRE. Some of the NMMR's customers include; government entities, realtors, land developers, mining companies and homeowners. Many of the maps in the repository are currently available in digital format and the repository is in the process of scanning all the maps in the collection. The NMMR is always looking for additional mine maps. Please contact us if you have mine maps that you would permit the Repository to scan and add to the collection. All physical maps may be returned to the owner.

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