053119 404 Authorities in Sioux City keeping a close watch on rising water levels. The Iowa DOT has closed a portion of Hamilton Boulevard at Interstate 29, and the southbound on-ramp and off-ramp to I 29. The Sioux City Public Boat Ramp is closed and access to Chris Larson Park from Hamilton Boulevard has been impacted. Also, there are portions of I- 29 still closed in western Iowa, one mile south of Missouri Valley to the south of Omaha. And from Pacific Junction all the way to the Missouri