Columbus (Delaware), Ohio

25,001 to 50,000 Hours - U.S. Rinker Materials-Concrete Pipe Div.

Napa, Calif.

Fewer than 25,000 Hours - U.S. Rinker Materials-Concrete Pipe Div.

Ft. Wayne, Ind.

150,001 to 200,000 Hours - Canada Lafarge Canada

Edmonton, Alberta

50,001 to 75,000 Hours - Canada Lafarge Canada

Winnipeg, Manitoba

25,001 to 50,000 Hours - Canada Hanson Pipe & Precast Canada