LAKE MICHIGAN - CALUMET
General / Bridges / Maintenance
*****REVISED***** IL - LAKE MICHIGAN – Chicago Harbor From August 15, 2025, through December 1, 2026, the Lake Street Bridge at Mile 1.64 (CORPS MILE 325.5) over the South Branch of the Chicago River, will be replaced, one leaf at a time. One half of the channel will be open to navigation without any equipment with a fully operational bridge leaf. The leaf of the bridge being replaced will be secured to masted navigation and will have six barges 120-feet by 80-feet or smaller working near or under the secured leaf. The contractor will display temporary steady burning yellow lights on the bottom and four-corners of the bridge leaves until the permanent bridge lighting can be established. Any equipment moving near mid-channel or in the unaffected side of the channel should be passed with standard agreements in accordance with the Navigation Rules. [16/25] [26/25]
Position 41-39.45N 087-38.47W
USCG Great Lakes District Local Notice to Mariners 44/2026