COLLINSVILLE —The Illinois Department of Transportation has announced the closure of Illinois 100 in Grafton because of flooding.
Motorists will need to utilize the currently marked detour of Illinois 3, Illinois 109 and Illinois 16 to circumvent the closure. In addition, Illinois 96 in Mozier and the Brussels Ferry remain closed.
Within the next 48 hours, river forecasts indicate additional closures will be required. The next road to likely be affected is Illinois 3 in Grafton.
The department will continue monitoring state roadways in Calhoun, Greene, Jersey, Madison, and Randolph counties throughout the weekend. Flooding has required closure of state highways and ferries along the Illinois and Mississippi Rivers.
Traffic control devices and directional signage, including dynamic message boards, have been deployed to guide motorists safely around major closures. Travelers are advised to consider alternate routes or allow additional time to travel known flood prone areas. Regardless, all motorists are urged to be patient, reduce speed and exercise added caution throughout the Metro East region – as traffic patterns and travel times will likely be affected.
For IDOT District 8 updates on Twitter, visit https://twitter.com/IDOTDistrict8.
The Illinois River at Hardin is forecast to crest at 32 feet at 1 a.m. Saturday, July 12, about 2 feet higher than its stage of 30.33 feet Wednesday. The highest recorded crest was 42.4 ft on Aug. 3, 1993. At 32 feet, considered major flooding, Water Street in Hardin begins flooding near John F. Kennedy Street.
The Mississippi River at Grafton is forecast to crest at 26.2 feet at 1 p.m. Friday, July 11, considered to be moderate flooding and about 1 foot higher than Wednesday's stage of 25.09 feet. At that stage, emergency measures are adopted because the water distribution begins to flood.
The Mississippi River at Melvin Price Locks and Dam in Alton is forecast to crest at 26 feet at 7 a.m. Saturday, July 12, a level considered to be minor flooding and about 2 feet higher than Wednesday's stage of 24.02 feet. At that stage, Missouri 94 and the east end of Harbor Point Road off Missouri 94 north of West Alton begin flooding. Also, the access road to the Lincoln Shields area off Missouri 67 just west of the Clark Bridge begins flooding.