Grand Forks County Prefabricated Bridge Jigsaw Puzzle Grand Forks County Prefabricated Bridge Why did Grand Forks County, N.D., representatives choose a prefabricated steel frame to refresh its 36th Street NE bridge spanning across the Goose River? Steel not only allowed it to withstand long winters and remain sturdy in a flood hotspot with limited vertical clearance (which proved crucial when a near-record flood event hit near the end of installation)--it also helped open the bridge to traffic in time for the spring planting season to avoid significant impacts to the local agricultural economy!