| Region | | Date | | Docket Number | | Case Name | | Statute - Section |
|---|
 R08 | | 01/04/2023 | | CAA-08-2023-0002 | | Dyno Nobel, Inc. – Cheyenne Plant | | CAA |
| R08 | | 12/27/2022 | | FIFRA-08-2023-0011 | | James Enterprise, Inc. DBA Berkey Filters | | FIFRA |
| R08 | | 12/21/2022 | | CERCLA-94-12 | | Anaconda Smelter Superfund Site, Old Works/East Anaconda Development A... | | CERCLA |
| R08 | | 09/30/2022 | | CERCLA-08-2022-0009 | | Colorado Smelter Site | | CERCLA |
| R08 | | 08/09/2022 | | SDWA-08-2022-0019 | | Kip’s Beer Garden Public Water System | | SDWA |
| R08 | | 07/26/2022 | | CERCLA-08-2022-0008 | | Idaho Pole Company | | CERCLA |
| R08 | | 06/09/2022 | | CAA-08-2022-0006 | | PacifiCorp – Jim Bridger Power Plant | | CAA |
| R08 | | 06/02/2022 | | RCRA-08-2022-0010 | | National Park Service (Ok-A-Beh Marina) | | RCRA |
| R08 | | 05/31/2022 | | CERCLA-08-93-26 | | Idaho Pole Company Site | | CERCLA |
| R08 | | 03/29/2022 | | CWA-08-2022-0004 | | Jeremy Clark and Cari Lane, LLC | | CWA |
| R08 | | 01/11/2022 | | SDWA-08-2022-0004 | | BEULAH LAND WATER, LLC | | SDWA |
| R08 | | 12/06/2021 | | CERCLA-08-2022-0002 | | RICO-ARGENTINE SITE; ATLANTIC RICHFIELD COMPANY | | CERCLA |
| R08 | | 10/26/2021 | | CERCLA-08-2022-0001 | | BAUER TAILINGS SITE; SEA RAY INVESTMENTS LLC | | CERCLA |
| R08 | | 09/14/2021 | | TSCA-08-2021-0009 | | DENVER PAINT COMPANY LLC | | TSCA |
| R08 | | 08/24/2021 | | CERCLA-08-2021-0006 | | THE LONDON MINE SOURCE AREA WITHIN THE BONITA PEAK MINING DISTRICT SIT... | | CERCLA |
| R08 | | 07/27/2021 | | SDWA-08-2021-0035 | | BROKEN WHEEL RANCH IMPROVEMENT & SERVICE DISTRICT; BROKEN WHEEL RANCH ... | | SDWA |
| R08 | | 06/23/2021 | | SDWA-08-2021-0029 | | Hot Springs Court Pubic Water System | | SDWA |
| R08 | | 04/23/2021 | | SDWA-08-2021-0020 | | DANIEL ALEXANDER AND DIANE ALEXANDER; MOUNTAIN VILLAGE PARKS PWS | | SDWA |
| R08 | | 04/14/2021 | | SDWA-08-2021-0018 | | TOWN OF TURNERVILLE | | SDWA |
| R08 | | 03/17/2021 | | CERCLA-08-2021-0005 | | RICHARDSON FLAT TAILINGS SITE; BIG HOSS PROPERTIES, LLC | | CERCLA |
| R08 | | 02/26/2021 | | CERCLA-08-2021-0004 | | SMURFIT STONE MILL SITE | | CERCLA |
| R08 | | 01/29/2021 | | SDWA-08-2021-0010 | | THE GROS VENTRE AND ASSINIBOINE TRIBES OF THE FORT BELKNAP INDIAN COMM... | | SDWA |
| R08 | | 01/22/2021 | | SDWA-08-2021-0009 | | HAPPY VALLEY PIPELINE, INC.; HAPPY VALLEY PIPELINE PUBLIC WATER SYSTEM | | SDWA |
| R08 | | 01/06/2021 | | CERCLA-08-2021-0002 | | BONITA PEAK MINIG DISTRICT SITE, SAN JUAN COUNTY, COLORADO; TODD C. HE... | | CERCLA |
| R08 | | 11/05/2020 | | CWA-08-2021-0003 | | WESTERN EQUIPMENT & TRUCK, INC. | | CWA |
| R08 | | 09/03/2020 | | SDWA-08-2020-0046 | | MR. AMANDEEP PANDHER, AKAL TRAVEL CENTER, LLC; AKAL TRAVEL CENTER PUBL... | | SDWA |
| R08 | | 08/25/2020 | | CERCLA-08-2020-0003 | | ILLINOIS GULCH SUPERFUND SITE TABR REALTY SERVICES, LLC | | CERCLA |
| R08 | | 08/17/2020 | | CAA-08-2020-0008 | | ENERPLUS RESOURCES (USA) CORPORATION | | CAA |
| R08 | | 07/27/2020 | | CAA-08-2020-0009 | | CRESCENT POINT ENERGY U.S. CORP. & CH4-FINLEY OPERATING, LLC | | CAA |
| R08 | | 07/15/2020 | | CAA-08-2020-0007 | | OVINTIV PRODUCTION INC. | | CAA |
| R08 | | 06/25/2020 | | RCRA-08-2020-0005 | | GREEN'S SALVAGE | | RCRA |
| R08 | | 06/16/2020 | | CWA-08-2020-0015 | | MANDAN, HIDATSA AND ARIKARA NATION; LAKEVIEW AGGREGATES FACILITY | | CWA |
| R08 | | 06/12/2020 | | CERCLA-08-2020-0001 | | UNITED STATES DEPARTMENT OF THE ARMY, ROCKY MOUNTAIN ARSENAL | | CERCLA |
| R08 | | 06/12/2020 | | CWA-08-2020-0014 | | JAMES HEIN | | CWA |
| R08 | | 04/22/2020 | | SDWA-08-2020-0024 | | TATA CHEMICALS (SODA ASH) PARTNERS | | SDWA |
| R08 | | 04/07/2020 | | CAA-08-2020-0006 | | WPX ENERGY INC. | | CAA |
| R08 | | 04/03/2020 | | CWA-08-2020-0007 | | SHEFFIELD RANCH CORP.; FRED WACKER | | CWA |
| R08 | | 03/20/2020 | | CAA-08-2020-0005 | | EP ENERGY E&P COMPANY, L.P. | | CAA |
| R08 | | 01/09/2020 | | CAA-08-2020-0003 | | MARATHON OIL COMPANY | | CAA |
| R08 | | 11/22/2019 | | CAA-08-2020-0002 | | MPLX LP (formerly Andeavor Logistics) | | CAA |
| R08 | | 10/10/2019 | | RCRA-08-2020-0001 | | JN TRUCKING, INC. | | RCRA |
| R08 | | 09/25/2019 | | CWA-08-2019-0011 | | C. SHARPS ARMS CO, INC. | | CWA |
| R08 | | 09/18/2019 | | SDWA-08-2019-0045 | | DANIEL ALEXANDER, MOUNTAIN VILLAGE PARKS | | SDWA |
| R08 | | 09/11/2019 | | SDWA-08-2019-0044 | | THE CROW TRIBE OF MONTANA, WYOLA PUBLIC WATER SYSTEM | | SDWA |
| R08 | | 09/05/2019 | | CWA-08-2019-0007 & CWA-08-2019-0008 | | THE CITY OF RONAN, MONTANA | | CWA |
| R08 | | 09/03/2019 | | CWA-08-2019-0005 | | BLACKFEET SOLID WASTE AND UTILITIES MANAGEMENT | | CWA |
| R08 | | 09/03/2019 | | CWA-08-2019-0006 | | TWO MEDICINE WATER COMPANY | | CWA |
| R08 | | 08/20/2019 | | CERCLA-08-2019-0004 | | SILVER BOW CREEK/BUTTE AREA SUPERFUND SITE | | CERCLA |
| R08 | | 08/15/2019 | | CERCLA-08-2019-0003 | | THE BEN FRANKLIN MINE; EUREKA GULCH PROPERTIES LLC AND RYAN BENNETT | | CERCLA |
| R08 | | 07/11/2019 | | CERCLA-08-2019-0002 | | RICHARDSON FLAT LOWER SILVER CREEK SETTLEMENT | | CERCLA |
| R08 | | 07/03/2019 | | CWA-08-2019-0004 | | THE TOWN OF LODGE GRASS | | CWA |
| R08 | | 05/24/2019 | | CWA-08-2019-0003 | | THE CITY OF POPLAR, MONTANA | | CWA |
| R08 | | 03/20/2019 | | CAA-08-2019-0006 | | KERR-MCGEE GATHERING LLC FORT LUPTON, PLATTE VALLEY, AND LANCASTER NAT... | | CAA |
| R08 | | 03/12/2019 | | CAA-08-2019-0005 | | DCP OPERATING COMPANY, LP GREELEY, KERSEY/MEWBOURN, PLATTEVILLE, ROGGE... | | CAA |
| R08 | | 10/29/2018 | | CWA-08-2019-0001 | | THE CROW TRIBE, THE CROW TRIBE WATER RESOURCES DEPARTMENT, AND THE APS... | | CWA |
| R08 | | 07/27/2018 | | CERCLA-08-2018-0009 | | EAGLE MINE SUPERFUND SITE, BATTLE NORTH, LLC, AND BATTLE SOUTH, LLC | | CERCLA |
| R08 | | 07/18/2018 | | SDWA-08-2018-0025 | | HEART BUTTE SCHOOL DISTRICT | | SDWA |
| R08 | | 05/04/2018 | | CERCLA-08-2018-0006 | | ACM Smelter & Refinery Site; Atlantic Richfield Company & ARCO Environ... | | CERCLA |
| R08 | | 04/04/2018 | | CAA-08-2018-0006 | | TARGAS RESOURCES CORPORATION | | CAA |
| R08 | | 03/16/2018 | | CAA-08-2018-0004 | | WILLIAMS FOUR CORNERS LLC/IGNACIO GAS PLANT | | CAA |
| R08 | | 03/16/2018 | | CAA-08-2018-0005 | | BARGATH LLC/PARACHUTE CREEK GAS PLANT | | CAA |
| R08 | | 03/02/2018 | | CAA-08-2018-0003 | | K.P. KAUFFMAN COMPANY, INC. | | CAA |
| R08 | | 09/12/2017 | | CAA-08-2017-0002 | | AMPLIFY ENERGY CORP. | | CAA |
| R08 | | 09/12/2017 | | SDWA-08-2017-0032 | | MOUNTAIN VILLAGE PARKS, INC AND DIANE AND DANIEL ALEXANDER | | SDWA |
| R08 | | 07/10/2017 | | CERCLA-08-2017-0005 | | BARKER HUGHESVILLE MINING DISTRICT SUPERFUND SITE | | CERCLA |
| R08 | | 07/10/2017 | | CERCLA-08-2017-0006 | | CARPENTER SNOW CREEK MINING DISTRICT SUPERFUND SITE | | CERCLA |
| R08 | | 03/21/2017 | | CWA-08-2017-0008 | | LINCOLN COUNTY | | CWA |
| R08 | | 12/27/2016 | | SDWA-08-2017-0007 | | MONUMENT GLOBAL RESOURCES, INC. | | SDWA |
| R08 | | 12/06/2016 | | SDWA-08-2017-0005 | | PIONEER NATURAL RESOURCES | | SDWA |
| R08 | | 09/13/2016 | | CWA-08-2016-0016 | | ROGER LOTHSPEICH | | CWA |
| R08 | | 08/26/2016 | | RCRA-08-2016-0007 | | HARVEY OST OILFIELD SERVICES, LLC | | RCRA |
| R08 | | 08/03/2016 | | RCRA-08-2016-0004 | | US MAGNESIUM LLC | | RCRA |
| R08 | | 05/26/2016 | | CERCLA-08-2016-0003 | | LINCOLN PARK SUPERFUND SITE | | CERCLA |
| R08 | | 11/30/2015 | | CERCLA-08-2016-0002 | | COLUMBIA FALLS ALUMINUM PLANT a/k/a ANACONDA ALUMINUM CO., COLUMBIA FA... | | CERCLA |
| R08 | | 11/12/2015 | | CERCLA-08-2016-0001 | | SMURFIT STONE MILL SITE - INTERNATIONAL PAPER COMPANY; WESTROCK CP., L... | | CERCLA |
| R08 | | 09/29/2015 | | CWA-08-2015-0029 | | CLEARWATER HOLDINGS, LLC. | | CWA |
| R08 | | 09/29/2015 | | RCRA-08-2015-0003 | | HIGH PLAINS MOTORS, INC. | | RCRA |
| R08 | | 08/19/2015 | | CAA-08-2015-0015 | | TESORO REFINING & MARKETING COMPANY, LLC, | | CAA |
| R08 | | 07/07/2015 | | CWA-08-2015-0020 | | NORTHERN CHEYENNE UTILITIES COMMISSION; LAME DEER WASTEWATER TREATMENT... | | CWA |
| R08 | | 07/01/2015 | | CERCLA-08-2015-0006 | | VASQUEZ BOULEVARD/INTERSTATE 70 SITE - OU #2; CITY AND COUNTY OF DENVE... | | CERCLA |
| R08 | | 05/14/2015 | | CWA-08-2015-0015 | | FOXTAIL CREEK, L.L.C | | CWA |
| R08 | | 04/06/2015 | | CWA-08-2015-0014 | | THE TOWN OF LODGE GRASS | | CWA |
| R08 | | 01/12/2015 | | CWA-08-2015-0011 | | DR. THOMAS RICHARDS (LITTLE GOOSE CREEK) | | CWA |
| R08 | | 12/17/2014 | | CWA-08-2015-0007 | | NEWFIELD PRODUCTION COMPANY | | CWA |
| R08 | | 07/15/2014 | | CERCLA-08-2014-0006 | | LINCOLN PARK SUPERFUND SITE - COTTER CORPORATION (N.S.L) | | CERCLA |
| R08 | | 06/16/2014 | | CWA-08-2014-0023 | | SCOTT WAGNER and LEIGH MARIE, LLC. | | CWA |
| R08 | | 05/22/2014 | | CERCLA-08-2014-0004 | | LOCKWOOD SOLVFENT SITE, OU 2 - KELLER TRANSPORT, INC. | | CERCLA |
| R08 | | 03/11/2014 | | CERCLA-08-2014-0003 | | RICHARDSON FLAT TAILINGS SITE OPERABLE UNITS 2 AND 3 - UNTIED PARK CIT... | | CERCLA |
| R08 | | 02/21/2014 | | RCRA-08-2014-0001 | | U. S. MAGNESIUM, LLC. | | RCRA |
| R08 | | 11/06/2013 | | CWA-08-2014-0006 | | LELAND F. WILSON | | CWA |
| R08 | | 09/24/2013 | | CWA-08-2013-0032 | | JAMES AND KAY BIANCO | | CWA |
| R08 | | 04/11/2013 | | CWA-08-2013-0010 | | CITY OF RONAN WASTEWATER TREATMENT FACILITY | | CWA |
| R08 | | 03/19/2013 | | CERCLA-08-2013-0002 | | EUREKA MILL SUPERFUND SITE and GCL EUREKA PROPERTIES, LLC. and GRANT L... | | CERCLA |
| R08 | | 02/19/2013 | | CERCLA-08-2013-0001 | | RICHARDSON FLAT TAILINGS SITE OPERABLE UNITE #4 - PARK CITY MUNICIPAL ... | | CERCLA |
| R08 | | 10/30/2012 | | CWA-08-2013-0002 | | LYNN BUTTARS | | CWA |
| R08 | | 04/06/2012 | | RCRA-08-2012-0001 | | R360 ENVIRONMENTAL SOLUTIONS, INC. | | RCRA |
| R08 | | 02/01/2012 | | CAA-08-2012-0002 | | ROCKY MOUNTAIN BOTTLE COMPANY, LLC. | | CAA |
| R08 | | 12/14/2011 | | CWA-08-2012-0002 | | POLIDORI CORPORATION, INC.; POLI-GOLD, L.L.C.; VERONICA POLIDORI | | CWA |
| R08 | | 09/08/2011 | | CERCLA-08-2011-0017 | | ACM SMELTER AND REFINERY SITE - OPERABLE UNIT #1 ATLANTIC RICHFIELD CO... | | CERCLA |
| R08 | | 08/04/2011 | | CERCLA-08-2011-0013 | | U. S. MAGNESIUM SITE - U. S. MAGNESIUM LLC. | | CERCLA 122(h) |
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