Uss Edgar Thompson Div/W. Mifflin

Past Producer in Allegheny county in Pennsylvania, United States with commodity Iron

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Nearby scientific data
Economic information about the deposit and operations
Land status
Ownership information
Links to other databases
Bibliographic references
Reporter information

Geologic information

Identification information

Deposit ID	10274926
MAS/MILS ID	0420039035
Record type	Site
Current site name	Uss Edgar Thompson Div/W. Mifflin
Alternate or previous names	West Mifflin Works

Geographic coordinates

Point of reference	Plant
Geographic coordinates:	-79.84556, 40.37782 (WGS84)
Elevation	238
Location accuracy	100(meters)

Site location context

Political divisions (FIPS codes)

Allegheny(county)

Pennsylvania(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Braddock(quadrangle 1:24,000 scale)

Pittsburgh East(quadrangle 1:100,000 scale)

Pittsburgh(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Monongahela(hydrologic unit)

Monongahela(hydrologic accounting unit)

Monongahela(hydrologic subregion)

Ohio(hydrologic region)

Geographic areas

Country	State	County
United States	Pennsylvania	Allegheny

Commodities

Commodity	Importance
Iron	Primary

Nearby scientific data

Plant (1)	-79.84556, 40.37782	ListMap

Economic information

Economic information about the deposit and operations

Operation type	Processing Plant
Development status	Past Producer
Commodity type	Metallic
Significant	No

Land status

Ownership category	Private

Ownership information

Type Unknown

Owner U.S. Steel Corp.

Type	Unknown
Owner	U.S. Steel Corp.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
U.S. Bureau of Mines	Minerals Availability System	MAS	0420039035

Bibliographic references

Deposit

75 PA IND DIR ADDRESS WEST MIFFLIN PA EMP 4065

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	15-NOV-83	Eastern Field Operations Center (EFOC)	U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Operator history (post-MRDS)

MRDS records operators as of each record's last update (≤ 2019). Some of the operators listed here have since changed hands or dissolved:

U.S. Steel Corp. — now part of United States Steel Corporation (2024)
Mining operations largely divested over the late 20th century; the broader U.S. Steel entity was acquired by Nippon Steel in 2024 (mining footprint is now minimal).

Curated by qvyshift.com from publicly-reported M&A activity (SEC filings, press releases, USGS Mineral Yearbooks). Not authoritative — verify against primary sources before relying on it. The MSHA panel above is the current authoritative source for actively-permitted mines.