The Story County Secondary Road Department will be replacing the existing bridge over Onion Creek on North Dakota Avenue. The bridge is located approximately 0.4 miles north of 215th Street. Gus Construction Co., Inc. out of Casey, IA will be performing the work. During construction North Dakota Ave. will be completely closed. Vehicles that normally travel North Dakota Ave. will need to take an alternative route. The official detour for the project will be 215th St. to Co. Rd. R-38 to Cameron School Rd and the reverse. We expect the project to take approximately 3 months to complete depending on the weather.