Mine · Webster County, Iowa, United States

Grebner-Oleson Pit

Grebner-Oleson Pit is a mine in Webster County, Iowa, United States, owned by NG Operations LLC.

Facts

Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.

FactValueSource
Name in the sourceGREBNER-OLESON PITMSHA Mines Data Set · Public domain · checked 24 Oct 2026
LocationWebster CountyMSHA Mines Data Set · Public domain · checked 24 Oct 2026
StatusOperating (active)MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Commoditiesgypsum (mainly gypsum)MSHA Mines Data Set · Public domain · checked 24 Oct 2026
OwnerNG Operations LLC (controls the operator)MSHA Mines Data Set · Public domain · checked 24 Oct 2026
OperatorGold Bond Building Products, LLC.MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Employees12 people (annual average, in 2025)MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Mine typeSurfaceMSHA Mines Data Set · Public domain · checked 24 Oct 2026
Coordinates42.5231, -94.0897MSHA Mines Data Set · Public domain · checked 24 Oct 2026

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How its owner compares

NG Operations LLC owns 6 of the 2,675 mines in the United States in our data with a named owner; 54 owners have more. Counts cover the mines in our data that name an owner, holder or operator; an asset with several owners counts for each.

Owner in United StatesRankMinesShare
Alpha Metallurgical Resources Inc1st562.1%
Sev.en Global Investments a.s.2nd501.9%
Rosebud Mining Company3rd401.5%
Martin Marietta Materials Inc4th291.1%
Metinvest B V4th291.1%
NG Operations LLC55th60.22%

Owner, operator and place

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Other mines in Iowa

All 13 mines in Iowa, United States

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