• Elastizell Corporation of America

• Gesell Concrete Products

• Granite Construction Co of Utah

• Greenstreak

• Haida Forest Products Limited

• Hancor

• Hardy Holzman Pfeiffer Associates

• Henry: E. P. Henry Corp.

• Infiltrator Systems Inc.

• J & J Drainage Products Co.

• J.L. Turner Co.

• JDR Enterprises

• Josam Co.

• L.M. Scofield Co.

• Lakelands Concrete Products, Inc.

• MEA-Josam

• MacDermot Studio

• Monarch Industries Ltd.

• Mueller Canada Inc.

• MultiDrain EconoDrain

• Neenah Foundry Co.

• Nordstrom Valves Inc.

• Norfield Corp.

• Norstar Industries

• North Carolina Granite Corp.

• Oxford Plastics Inc.