Northern Iowa
counties north of and including Woodbury, Ida, Sac, Calhoun, Webster, Hamilton, Hardin, Grundy, Black Hawk, Buchanan, Delaware and Clayton 
Northwestern Power Eq. 
2740 Patton Road 
Roseville, MN 55113 
Phone: (651) 628-0683
Fax: (651) 628-0753

Central Iowa
Excluding the counties of Dubuque, Jackson, Clinton, Scott, Muscatine, Louisa, Des Moine, and Lee 
Bert Gurney & Assoc., Inc.
4428 South 108th St.
Omaha, NE 68137
Phone: (402) 551-7995
Fax: (402) 553-5879

Eastern Iowa
Only the counties of Dubuque, Jackson, Clinton, Scott, Muscatine, Louisa, Des Moine, and Lee 
Serpentix Corporation
9085 Marshall Court
Westminster, CO 80031
Phone: (303) 430-8427
Fax: (402) 553-5879