| Adaptor, Inc. |
| ADS |
| Advanced Drainage Systems |
| Aerotek |
| Aflac |
| American Cast Iron Pipe |
| American Commercial, Inc. |
| Assurance Agency |
| ATM ENT. LTD. |
| Auto Truck |
| Baker Pumps |
| Bluff City Materials, Inc |
| Burris Equipment Company |
| Candid Business Solutions, LLC. |
| Casey Equipment |
| Christofano Equipment |
| Clow Water Systems Co. |
| Columbian Agency |
| Contech Construction Products |
| Contract Dewatering |
| Crissie Insurance Group |
| DiCicco Concrete Products, Inc. |
| Divane Brothers Electric Co. |
| Dohn & Associates |
| DS&P Insurance Services, Inc. |
| East Jordan Iron Works |
| Elmhurst-Chicago Stone |
| EOCN |
| F & A Construction Equipment |
| Financial Federal Credit Inc. |
| First Midwest Bank |
| Fleet Matics USA |
| FOCIS Promotions & Incentives |
| Getum, Inc. |
| Godwin Pumps of America |
| Graber Concrete Pipe Co. |
| Green Pipe & Supply, Inc. |
| Griffin Dewatering, Midwest, L.L.C. |
| Griffin Pipe Products Co. |
| H & J Underground Testing |
| Hancor, Inc. |
| Hard Rock Concrete Cutters |
| HD Waterworks Supply |
| Heritage Logistics |
| Highway Technologies |
| Hilb, Rogal, & Hobbs (HRH) |
| Holland & Knight LLP |
| Howell Tractor & Equipment |
| HUB International Scheer's Inc. |
| INLAD Truck and Van Equipment |
| ITT Flygt Corporation |
| John Sakash Company |
| JULIE, Inc. |
| Kieft Brothers Inc. |
| Lafarge North America |
| Lee Jensen Sales Co., Inc. |
| Mackie Consultants, LLC |
| Martin Equipment of IL, Inc. |
| Martin Implement Sales |
| Maurides & Foley, L.L.C. |
| McCann Industries, Inc. |
| Mersino Dewatering Midwest |
| Metropolitan Industries, Inc. |
| Meyer Material Company |
| Mid-American Water of Aurora |
| Mid-American Water of Wauconda, Inc. |
| Midwest Chlorinating & Testing |
| MKMP, LLC |
| Mueller Co. |
| National Concrete Pipe Co. |
| Naylor Pipe Company |
| Neenah Foundry Company |
| Northwest Pipe Company |
| Northwestern Mutual Financial Serv |
| Northwind Concrete Products |
| OccuSport Physical Therapy |
| Ogletree Deakins Nash Smoak & Stewart |
| O'Rourke, Hogan, Fowler & Dwyer |
| OSCO, Oil |
| Ozinga Bros., Inc. |
| Patten Construction Products |
| Pirtek O'Hare |
| Planet Underground |
| Positioning Solutions Co. |
| Prairie Group, Inc. |
| Prinsco, Inc. |
| Rabjohns Financial Group |
| Rain For Rent |
| Resource Utility Supply |
| Ridge Tool Company |
| Ritchie Bros. Auctioneers |
| Robinson Engineering, LTD. |
| Roland Machinery Co. |
| Roughneck Concrete Drilling & Sawing |
| Safety Alliance Ltd. |
| Safety Management, Inc |
| Sawyer Falduto Asset Management, LLC. |
| Schwartz Bros. Insurance Agency, Inc. |
| SES, Inc. |
| Sigma Corporation |
| Smith Engineering Consultants, Inc. |
| Southern Underground Services, Inc. |
| Standard Equipment Co. |
| StormTrap, LLC |
| Thelen Materials |
| Tonyan Bros., Inc. |
| Travelers Insurance |
| TT Technologies, Inc. |
| Tyler Pipe/Union Foundry |
| U.S. Pipe & Foundry |
| Underground Pipe & Valve Co. |
| United Rentals Trench Safety |
| Utility Concrete Products, LLC |
| Vermeer Midwest, Inc. |
| Vulcan Materials |
| Water Products Co. |
| Weible & Cahill |
| Welch Bros. Inc. |
| West Side Tractor Sales |
| Wolf and Company, LLP |
| World Diamond Source |
| Ziebell Water Service Products |
| Zimmerman Ford |
Associate Members
