| Ace Steel & Recycling, Inc. |
| Adams Salvage Recycling & Recovery |
| Advanced Recycling |
| Alliance Consulting, LC. |
| American Engineering Testing |
| American Services Corporation |
| APEX Equipment, LLC |
| SCS Engineers |
| Barker Concrete & Construction |
| Belle Fourche, City |
| Bob's Disposal Service |
| Bomag Americas, Inc |
| Boyer Trucks |
| Brad Kiecker |
| Braun Intertec |
| Britton, City of |
| Brookings Landfill |
| Brown County Landfill |
| Burns & McDonnell Engineering Co. Inc. |
| Butler Machinery |
| Central States Wire Products |
| City of Gettysburg |
| Cook, Karen |
| Dakota Wood Grinding |
| Dependable Sanitation |
| Edgemont, City of |
| Energy Labs |
| EPG Companies Inc. |
| Faulkton, City of |
| Geotek |
| Gregory County |
| Healthcare Environmental Services, Inc. |
| Houston Engineering |
| Huron, City of |
| Interstate Power Systems |
| Kadoka, City of |
| KVA Engineering |
| L&P Wire Tie Systems |
| L.P. Gill, Inc. |
| Langford, Town of |
| Lemmon, City of |
|
| Madison, City of |
| Marcel Equipment |
| McLaughlin, City of |
| MidContinent Testing Labs |
| Midwest Assistance Program (MAP) |
| Midwest Bio-Systems |
| MinnKota EnvironServices, Inc. |
| Mitchell, City of |
| Montrose, City of |
| Mount Vernon, City of |
| Mueller Pallets, LLC |
| New Waste Concepts |
| North American Truck and Trailer |
