Valley, Minn.
Rinker Materials-Concrete Pipe Div.
Sealy, Texas
100,001 to 150,000 Hours-U.S. Amcor Precast (Oldcastle)
Nampa, Idaho; Ogden (Wall Ave.), Utah
California Concrete Pipe (Oldcastle)
Stockton, Calif.
Cretex Concrete Products North
Elk River, Shakopee, Minn.
Geneva Pipe Co.