Attorney General Tom Miller Monday filed seven lawsuits in six counties over alleged violations of Iowa’s One Call law.  The suits involve excavations in Linn, Palo Alto, Jasper, Woodbury, Franklin and Pottawattamie counties. All seven cases involve natural gas lines. The companies facing the alleged violations include Knutson Construction Services Midwest Inc.; Leroy & Sons Inc.; Norm Rozendaal Tiling Inc.; Olmstead Construction Inc.; Perez Construction; Roy E. Plagge; and Wes Casson & Son LLC. For more information about Iowa One Call, go to www.iowaonecall.com.