FRS Facility Detail Report


MOUNTAIN GATE QUARRY

EPA Registry Id: 110006657466
20285 RADCLIFF ROAD
REDDING, CA 96003


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:
AIR FACILITY SYSTEM
MOUNTAIN GATE QUARRY 06089PO004 AIR SYNTHETIC MINOR (OPERATING) AIRS/AFS 07/30/2014
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
SWA AT MOUNTAIN GATE QUARRY CA0084140 STORM WATER INDUSTRIAL ICIS 07/31/2008 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
ICIS-AIR (AIR)
MOUNTAIN GATE QUARRY CASHA00006089PO004 AIR SYNTHETIC MINOR ICIS 10/19/2014
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
SWA AT MOUNTAIN GATE QUARRY CAZ447267 STORM WATER INDUSTRIAL ICIS 07/01/2015
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
SWA AT MOUNTAIN GATE QUARRY CA0084140 ICIS-NPDES NON-MAJOR ICIS 07/31/2008 ICIS-
ENFORCEMENT/COMPLIANCE ACTIVITY
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (ICIS-NPDES)
SWA AT MOUNTAIN GATE QUARRY CAZ447267 ICIS-NPDES NON-MAJOR ICIS 07/01/2015
EMISSION INVENTORY SYSTEM (EIS)
MOUNTAIN GATE QUARRY 736811 AIR EMISSIONS CLASSIFICATION UNKNOWN EIS 04/01/2025

Additional EPA Reports:  

MyEnvironment  Enforcement and Compliance  Facility Coordinates Viewer  Watershed Report

Standard Industrial Classification Codes (SIC)

Data Source SIC Code Description Primary
NPDES
1422
CRUSHED AND BROKEN LIMESTONE

AIRS/AFS
3253
CERAMIC WALL AND FLOOR TILE

AIR
3253
CERAMIC WALL AND FLOOR TILE

NPDES
1422
CRUSHED AND BROKEN LIMESTONE

Facility Codes and Flags

EPA Region: 09
Duns Number:
Congressional District Number: 01
Legislative District Number:
HUC Code/Watershed: 18020101 / SACRAMENTO-LOWER COW-LOWER CLEAR
US Mexico Border Indicator: NO
Federal Facility: NO
Tribal Land: NO

Alternative Names

Alternative Name Source of Data
SWA AT MOUNTAIN GATE QUARRY NPDES
MOUNTAIN GATE LIMESTONE QUARRY NPDES PERMIT
MATHEWS READYMIX INCorporated AIR VOLUNTARY SUBMISSION

Organizations

Affiliation Type Name DUNS Number Information System Mailing Address
OWNER
STIMPEL-WIEBELHAUS ASSOCIATES INC
NPDES
View
MAILING ADDRESS
STIMPEL-WIEBELHAUS ASSOCIATES INC
NPDES
View
MAILING ADDRESS
STIMPEL-WIEBELHAUS ASSOCIATES
NPDES
View
PARENT COMPANY
STIMPEL-WIEBELHAUS ASSOCIATES
EIS


National Industry Classification System Codes (NAICS)

Data Source NAICS Code Description Primary
EIS 212312 CRUSHED AND BROKEN LIMESTONE MINING AND QUARRYING.
AIR 327122 CERAMIC WALL AND FLOOR TILE MANUFACTURING.
AIRS/AFS 327122 CERAMIC WALL AND FLOOR TILE MANUFACTURING.

Facility Mailing Addresses

Affiliation Type Delivery Point City Name State Postal Code Information System
MAILING ADDRESS P.O. BOX 492335 REDDING CA 96049 NPDES
MAILING ADDRESS 452 SPTG/CE, 610 MEYER DRIVE REDDING CA 96049 NPDES
FACILITY MAILING ADDRESS 20285 RADCLIFF RD REDDING CA 96003 AIR
FACILITY MAILING ADDRESS 20285 RADCLIFF RD REDDING CA 96003 AIRS/AFS
OWNER P.O. BOX 492335 REDDING CA 96049 NPDES

Contacts

Affiliation Type Full Name Office Phone Information System Mailing Address
OPERATOR
CORKEY HARMON


NPDES


Query executed on: OCT-14-2025