sentences:  It underwent major rehabilitation from 1989 through 2002.The lock and dam are owned and operated by the St. Paul District of the United States Army Corps of Engineers-Mississippi Valley Division.The lock and dam system consists of a concrete structure long with five roller gates and 11 tainter gates, a segment of earth embankment long from the dam to French Island separated by a concrete spillway long, and another embankment long from French Island to Onalaska which has a concrete spillway long.