Great River Road Flood Conditions

Warm Spring temperatures means melting snow and rising river waters. Minor to moderate flooding is occuring along the Mississippi, Illinois and Missouri rivers.

Plan your trip to the Great Rivers & Routes region using the information below:


Last updated April 17, 2019 at Noon
River levels are starting to fall in both Grafton and Alton after cresting last week.  Click here for updates on river levels.


OPEN: Great River Road (IL100) open from Broadway Street (U.S. Route 67) in Alton to IL 3 in Grafton

OPEN: All four lanes of U.S. 67 are open south of the Clark Bridge.

CLOSED: Illinois 100 from IL 3 to Stump Lake Road in Grafton

CLOSED: Lincoln Shields Access Road in West Alton and outer U.S. 67 road to Riverlands Way


CLOSED: Illinois 96 at Illinois 100 in Calhoun County

CLOSED: Illinois 100 from Hardin to Kampsville

Take another route to Pere Marquette State Park during high waters.


Brussels Ferry is CLOSED

Golden Eagle Ferry is CLOSED

The Winfield Ferry is OPEN

The Grafton Ferry is CLOSED





Riverfront Park in Alton



Grafton Oyster Bar, Grafton (closed until further notice) 

Knotty by Nature, Grafton

MORE: List of events

River Levels at Alton

The Mississippi River is currently at 25.8  feet after cresting at 31.95 feet. Water levels continue to fall.

Flood Impact
32.9 Feet: Riverfront Park begins flooding.
31.5 Feet: Commercial basements in Alton begin to flood.
29.9 Feet: Great River Road in Alton closes.
28.8 Feet: Great River Road begins flooding at Clifton Terrace.
25 Feet: Access road to Lincoln Shields area begins flooding
21 Feet: Flood stage. Minor flood begins.

River Levels at Grafton

The Mississippi River is currently at 26.6 feet after cresting at 29.03. River levels are anticipated to drop.

Flood Impact
28.3 Feet: The intersection at Great River Road and Main Street floods.
26.4 Feet: Residential flooding in Grafton occurs.
25.5 Feet: Brussels Ferry closes near this height. O’Jan’s Fish Stand in Grafton closes near this height.
24.7 Feet: City of Grafton closes Route 100 near Evans Street. Also at this level the Catholic Church parking lot at Main & Evans begins flooding. This represents the lowest point on Main Street in Grafton.
24 Feet: Route 100 begins flooding at Chautaqua and Elsah.
21.9 Feet: In northern St. Charles County, Grafton Ferry Road is closed.

River Levels at Hardin

The Illinois River at Hardin is at 31.1 feet after cresting at 34.25 feet. River levels are expected to drop.

Flood Impact
34 Feet: Route 100 is flooded north of Hardin.
33.79 Feet: Route 96 is overtopped in Kampsville.
32.7 Feet: Kampsville Inn begins flooding.
32 Feet: Water Street in Hardin begins flooding.
25 Feet: Flood stage

(All information provided by the NOAA)

Why would the road be closed?
One of the many signatures of spring,  summer and fall in this region is the rising of the Mississippi and Illinois rivers. Every couple of years, heavy rains lead to the swelling of the river beyond its banks. This year happens to be one of those years.

MORE: Explore the Great River Road

Can you still drive and ride along the scenic byway?
Yes! Illinois Route 100 between Alton and Grafton is currently open.
Are the events schedule for this weekend still happening?
All events will take place as planned.
Is it okay to plan a trip?  Will the businesses be open?
We hope that this little "bump in the road" won't stop you from visiting us all around Alton. This is the prime season to roll the windows down, relax and enjoy the drive! The riverside restaurants and wineries in Grafton are calling your name. Grab your bike or hiking shoes for an adventure you won't soon forget at Pere Marquette State Park.  There is no better time than the present to getaway!

MORE: Find amazing deals to use on your getaway

If you have additional questions or concerns, do not hesitate to ask us a question by chatting with us by clicking on the chat button on the bottom right hand corner of this page. You can also call the Alton Visitor Center at (800) 258-6645. uses cookies to ensure that we provide you with the best browsing experience. By continuing to use the site, we will retain your current cookie settings.