FRS Facility Detail Report


MILLS COMPLEX

EPA Registry Id: 110001933472
302 HUDSON STREET
MILLS, WY 82604


The facility locations displayed
come from the FRS Spatial
Coordinates tables. They are the
best representative locations for
the displayed facilities based on
the accuracy of the collection
method and quality assurance
checks performed against each
location. The North American
Datum of 1983 is used to display
all coordinates.

Environmental Interests

Information System System Facility Name Information System Id/Report Link Environmental Interest Type Data Source Last Updated Date Supplemental Environmental Interests:
INTEGRATED COMPLIANCE INFORMATION SYSTEM BLACK HILLS BENTONITE MILLS PLANT 6224568 FORMAL ENFORCEMENT ACTION ICIS 01/27/2004 ICIS-08-2004-0046
FORMAL ENFORCEMENT ACTION
AIR FACILITY SYSTEM
BLACK HILLS BENTONITE _ MILLS PLANT 5602500006 AIR MAJOR (OPERATING) AIRS/AFS 04/09/2014
EMISSION INVENTORY SYSTEM (EIS)
MILLS COMPLEX 8040811 CRITERIA AIR POLLUTANT MAJOR EIS 01/17/2025
INTEGRATED COMPLIANCE INFORMATION SYSTEM BLACK HILLS BENTONITE MILLS PLANT 6224568 ENFORCEMENT/COMPLIANCE ACTIVITY ICIS 12/11/2003 ICIS-08-2004-0046
FORMAL ENFORCEMENT ACTION
ICIS-AIR (AIR)
MILLS COMPLEX (BLACK HILLS BENTONITE LLC) WY0000005602500006 AIR MAJOR ICIS 02/12/2015

Additional EPA Reports:  

MyEnvironment  Enforcement and Compliance  Facility Coordinates Viewer  Watershed Report

Standard Industrial Classification Codes (SIC)

Data Source SIC Code Description Primary
AIR
1459
CLAY, CERAMIC, AND REFRACTORY MINERALS, NOT ELSEWHERE CLASSIFIED

ICIS
1459
CLAY, CERAMIC, AND REFRACTORY MINERALS, NOT ELSEWHERE CLASSIFIED

AIRS/AFS
1459
CLAY, CERAMIC, AND REFRACTORY MINERALS, NOT ELSEWHERE CLASSIFIED

Facility Codes and Flags

EPA Region: 08
Duns Number:
Congressional District Number: 01
Legislative District Number:
HUC Code/Watershed: 10180007 / MIDDLE NORTH PLATTE-CASPER
US Mexico Border Indicator:
Federal Facility: NO
Tribal Land: NO

Alternative Names

Alternative Name Source of Data
MILLS HARRY THORSON PLANT EIS
MILLS PLANT PCS
BLACK HILLS BENTONITE MILLS PLANT ICIS
MILLS COMPLEX (BLACK HILLS BENTONITE LLC) AIR

Organizations

Affiliation Type Name DUNS Number Information System Mailing Address
PARENT COMPANY
BLACK HILLS BENTONITE LLC
EIS


National Industry Classification System Codes (NAICS)

Data Source NAICS Code Description Primary
AIRS/AFS 212325 CLAY AND CERAMIC AND REFRACTORY MINERALS MINING.
EIS 212323

AIR 212325 CLAY AND CERAMIC AND REFRACTORY MINERALS MINING.

Facility Mailing Addresses

Affiliation Type Delivery Point City Name State Postal Code Information System
FACILITY MAILING ADDRESS 302 HUDSON MILLS WY 82644 AIR
FACILITY MAILING ADDRESS 302 HUDSON MILLS WY 82644 AIRS/AFS

Contacts

No Contacts returned.

Query executed on: OCT-14-2025