America’s Working Waterways – Post V: The Illinois Waterway, Chicago's Canal Connection, and the Kaskaskia River
When the River Quits Moving
If memory serves, it was the summer of 1988 when the Mississippi got low enough that it backed up onto the Illinois, and hundreds of loaded ADM corn barges sat stuck for weeks. I had responsibility for our barge loading at the time, and nobody in that business was smiling. Those barges were supposed to be headed for the Gulf. Instead, they were sitting on the river in the summer heat.
We sent crews out to open covers and run portable aerators. We applied propionic acid to attempt to slow mold growth until the water came back. It worked, mostly, but it took a lot of hands and a lot of worry to save grain that should have been long gone.
That is the point of this post. The Illinois Waterway runs through some of the best corn and soybean ground in the world. It only pays when it moves. Low water, a lock outage, or ice shows up first as elevator space, truck lines, and the bid a farmer sees.
This is Post V of America's Working Waterways. It covers the Illinois Waterway, the Chicago canal connection at the north end, and the Kaskaskia River in southwestern Illinois. Towboats, barges, and lockage mechanics are in the companion post, How the System Actually Runs. https://www.grainguyfifty.com/post/america-s-working-waterways-bonus-post-how-the-system-actually-runs-towboats-barges-terminals
Here we stay on what makes this corridor different.
How to use this post: This is a longer educational reference. It is meant to be read once for the story and returned to later for the details. The companion brief gives the short version for a quick read.
What This Corridor Is
The Illinois Waterway runs about 336 miles from the Calumet River at Chicago to Grafton, where the Illinois meets the Mississippi. On a map it looks like one river. It is a built system: canals at the top, the Des Plaines in the middle, the Illinois River itself the rest of the way. The water drops from about 579 feet above sea level at Lake Michigan to about 419 feet at Grafton. Eight locks and dams handle that 160-foot drop.
For grain, the heart of it is central and western Illinois, close enough to good ground that a short truck haul to a river elevator still makes sense. Grain loaded here enters the Mississippi at Grafton, clears Melvin Price at Alton and Locks 27 on the Chain of Rocks Canal, rebuilds into a Gulf tow in the St. Louis harbor, and becomes export grain. That last stretch can’t be bypassed. An Illinois load is only as good as the river below it.
Chicago
The Illinois and Michigan Canal opened in 1848 and made Chicago the link between the Great Lakes and the Mississippi basin. In 1900 the Chicago Sanitary and Ship Canal replaced it and reversed the Chicago River away from the lake. The modern waterway follows that route. Traffic can enter at Chicago Harbor Lock or at T.J. O'Brien Lock and Dam on the Calumet River, the top lock on the Illinois Waterway. The Chicago end is industrial now. Grain through it is rare.
Kaskaskia
The Kaskaskia is a different animal: 36 navigable miles, about 9 feet deep, from the Mississippi north of Chester up toward Fayetteville. One lock does all the work, Jerry F. Costello, less than a mile above the mouth. The chamber is 84 feet wide by 600 feet long, lift up to about 29 feet depending on the Mississippi. Tows are built to that width, two barges across, not a 15-barge Illinois line-haul. The Kaskaskia Regional Port District, chartered in 1965, runs the docks. Grain joins the Mississippi north of Chester and rides the same southbound traffic.
What Moves
For agriculture , Grain goes down. Fertilizer comes up.
Commercial use of the Illinois is older than these locks. Steamboats and packet lines were thick on the river by the 1850s. From the 1840s into the 1860s, grain and other farm freight moved on keelboats and flat barges lashed to the packets, often at a few cents a bushel, bound for St. Louis or, after the Illinois and Michigan Canal, Chicago. Rail took most of that grain after the Civil War. By the 1920s the river was down to sand, gravel, and local freight, on the order of 100,000 to 200,000 tons a year.
The modern grain river starts with the nine-foot project. The Illinois Waterway opened in the mid-1930s and was finished in 1939, Peoria and LaGrange the last locks in. Early traffic was coal, sand, petroleum, and sulfur more than corn. Grain was already on the books, about 1.5 million tons in 1948, roughly 12 percent of the waterway but it was not the cargo the locks were built around. Export grain is the postwar story, especially the 1970s, once the Gulf became the bid and Illinois corn and soybeans filled hopper barges that had come up light or with fertilizer. By the early 1990s farm products were close to half the river’s tonnage, up from about 30 percent in the early 1970s. That is the river this post is about.
At LaGrange, the busiest lock on the river, farm products share the chamber with chemicals, petroleum, and manufactured goods. The lock sits 7.8 miles below Beardstown, river mile 80.2, eighty miles above Grafton. It is the last lock a loaded Illinois tow has to make on the Illinois River itself.
The mix is what keeps the corridor alive between harvests. Fertilizer and industrial freight pay for boats, fleeting, and harbor service year-round. They also compete for the same hopper barges. The Illinois sits near the top of the system, so empties have to come back up before they can load grain. A barge that comes up with fertilizer and goes down with corn pays twice. When spring fertilizer and fall harvest overlap, they bid against each other for steel.
On the Kaskaskia the mix is more industrial. Around 2019 the river moved about 1.5 million tons a year. Coal and slag have faded with local power plants. Fertilizer, coiled steel, gypsum, and stone now take most of the dock time. Outbound grain is concentrated at the Evansville / Kempers Landing terminal. A house at Chester sits near the mouth, on the Mississippi side of the same cluster.
A standard hopper barge loaded to 9 feet carries about 1,500 short tons: roughly 53,500 bushels of corn at 56 pounds, or about 50,000 bushels of soybeans at 60 pounds.
How It Runs
The authorized channel is 9 feet, same as the Upper Mississippi. That is a published depth, not a loading order. Nine feet is the potential draft when stage, shoaling, and the fleet all cooperate. A lot of Illinois grain I saw left the house at 8 feet 6 inches. Actual draft still depends on stage, shoaling, dredging, and the carrier. Every inch light-loaded is grain that needs another barge. Six inches off a full barge is on the order of 100 tons.
Reading the draft is a four-corner job, not a glance at the side nearest the dock. The marks are on the bow and the stern, port and starboard, and the waterline is the number. Average the four and you have the mean draft, but only if the barge is level. One heavy corner can read 9 feet while the other three read 8 feet 6. The river does not care about the average. The deep corner is what hangs up.
You cannot leave that corner deep. The towboat can refuse the barge. It will not face up square, it throws the tow out of shape, and it can twist a cover. The rest of the tow sits while the grain is shoveled from the heavy corner to the light ones. If the barge is overloaded, the grain has to be taken out.
A good barge loader avoids that in one pass: stern down first, then forward under the stream so the barge levels as it fills. Draft is read off the marks, often with sticks, and a lot of docks now use electronic gear. All four corners even is how the barge takes the tons on the rate sheet and still floats square.
From north to south the locks are T.J. O'Brien, Lockport, Brandon Road, Dresden Island, Marseilles, Starved Rock, Peoria, and LaGrange. Most date to the 1930s; Peoria and LaGrange opened in 1939. Seven chambers are 110 by 600 feet.
A 15-barge tow plus boat is longer than that, so every trip double-locks: first cut through, then the second cut and the boat, then the tow put back together. On a lot of those lockages there is a second towboat in the picture. The line boat shoves the first cut in and backs out to face up to the second cut. A helper or harbor boat, or another boat waiting its turn, pulls the first cut clear and holds it on the guide wall so the line boat is not doing all of that work alone. The lock winch can pull the cut out too. Either way, a double lockage is two lockages plus a make-up, and the second boat is there because time in the chamber is money.
In 2017 the average wait at LaGrange was just under eight hours; at Peoria, about an hour. A cut takes about the same time in either chamber. The difference is the line. More tows have to lock at LaGrange, so more of them sit. Those waits move with the traffic.
On the Illinois Waterway there is no 1,200-foot lock. The size exception is O'Brien, 1,000 feet, about a 5-foot lift, on the Calumet entrance to the lake. It was not built for grain, and the harvest tows do not use it. The grain locks are the 600-foot chambers from Lockport down through LaGrange.
Peoria and LaGrange still use wicket dams, hinged panels that stand up to hold a pool or lie flat on the bottom. In high water the wickets go down and tows run open river over the dam. Original wickets were white oak. The Corps is replacing them with composites and has added bulkheads so crews can work the dam without waiting on a perfect stage.
Below Grafton the Illinois tow is off the Illinois River. Grafton is the mouth. From there the tow is on the Mississippi, and St. Louis is still downstream.
To get to St. Louis, and past it toward the Gulf, it has to clear two Mississippi locks. Mel Price is at Alton. Locks 27 are farther down, at the Chain of Rocks Canal. Each has a 1,200-foot main chamber and a 600-foot auxiliary. Locks 27 moves more cargo than any other navigation structure on the Mississippi.
On the Kaskaskia there is no second chamber and no bypass. If Costello is closed, the river is closed.
Spring is high water and slowdowns. Late summer is low water. Winter is ice. USDA has the Illinois open most winters except in hard cold.
Where Grain Gets on
Think of the Illinois in four reaches, not a phone book. Ownership changes. The towns last longer than the letterhead. A few house names show up below where they add something. I hope they are right. Ownership changes, and it is hard to stay current. What matters is that the docks are there.
Upper river. Joliet is industrial and Morris sees heavy industrial traffic as well. But Morris also has three or four docks that load grain only. Ottawa, LaSalle, Peru, Spring Valley, Hennepin, Henry, and Lacon have the traditional grain barge loading terminals. . This is the northern tier, where shuttle trains have challenged and taken substantial grain tonnage from the river. They rail loaders started here, but have not just stayed here, they continue to migrate further into central Illinois.
Peoria reach. Peoria, East Peoria, Creve Coeur, Pekin. Center of the waterway. The lock sits about four miles below town. Elevators, fertilizer docks, and fleeting work the harbor. Harbor boats do the work nobody sees: pull a barge out of the fleet, set it under the spout, take the load back out to build a tow. One of them is the M/V Becky Ann, named for my wife in 1996. Peoria Lake above the lock has lost about 68 percent of its 1903 capacity to sediment, per Illinois State Water Survey work. Outside the navigation cut it is shallow flats. If the harbor cannot take a loaded barge, the problem is already in the country bid.
Central river. Havana and Beardstown sit in dense grain country. Havana is a straight grain town. Two houses load on South Water Street. No industrial harbor. Just good ground close to water, which is what most of this business still looks like. Not every load comes out of a house with bins on the bank. Beardstown also has an over-the-bank loader, where trucks dump inland and a conveyor puts the grain on the barge. Same river, different footprint.
Lower river. Meredosia, Naples, Valley City are the last big load-out docks before the river narrows into the hill country. Beardstown sits just above them. Below that the elevators get smaller: Kampsville, then Hardin, then Grafton at the mouth.
This is not another Peoria. The tows are shorter, the docks are farther apart, and a lot of the grain has already been loaded upstream. What is left is the bottom of the Illinois, the last chance to put a barge on the water before the tow leaves the river at Grafton and takes its place in the Mississippi queue.
On the Kaskaskia, grain is a handful of docks, not a string of houses. The Evansville / Kempers Landing dock takes corn, soybeans, and wheat. The port district terminal at Baldwin takes fertilizer inbound; the conveyor there was replaced in 2025 so spring product could keep moving. Steel, gypsum, and stone share the same water. Fayetteville, at the head of navigation, is still more site than house.
What Stops It
Demand is not the limit. Age, weather, and the river below St. Louis are.
The 600-foot chambers are close to 90 years old. Time in line is a freight cost, and LaGrange is the lock to watch. Before the 2020 rehab it had not been dewatered since 1987.
Rock Island tried to do the repairs the only way that does not wreck a harvest twice: announce early, close several locks at once, get out. A short closure in 2019, then the long one in 2020 — LaGrange, Peoria, Starved Rock, Marseilles, and Dresden Island down together from early July, three to four months depending on the site. Brandon Road, Dresden Island, and Marseilles came back in 2023, June through September. During the 2020 outage only the 80 miles below LaGrange stayed open. A lot of Illinois grain was closer to the Mississippi than to that stretch, Mid-Mississippi freight had been running about 19 percent over the Illinois, and the boats followed the grain.
Lockport was the single-site version. A 2025 dewatering to hang new gates found cracked hinges on the downstream miters. Crews wrapped them so traffic could keep moving, then closed the lock from March 31 through May 19, 2026, and reopened on schedule. Planned work costs money. Surprise work costs more.
Low water is 1988 again: light loads, slow tows, barges that cannot leave, empties that cannot get in, houses that fill. It does not have to start on the Illinois. Low water at St. Louis and south cuts draft and tow size for Illinois grain even when the Illinois itself looks fine.
High water is the other side of the same problem. Current, tight bridge clearance, challenging fleeting, traffic limits. The river floods from the bottom up, Mississippi backwater first. In 2019 Costello Lock and Dam on the Kaskaskia was closed 87 days.
At the Chicago end the Corps has run an electric barrier at Romeoville since 2002 to keep Asian carp out of the lakes. Brandon Road, near Joliet, is the second layer: a flushing lock, another electric barrier, sound, and a bubble curtain, about $1.15 billion. Construction started in 2025 and brought weekday closures. The stated goal is to stop the fish without stopping the commerce. Grain only cares about the second half of that sentence.
What Else Can Take the Grain
The Center Gulf price still sets the base for a lot of Illinois grain. The river bid is that price minus barge freight. Farmers now have more doors than they used to: crush, shuttle loader, river house, container yard, country elevator, their own bin.
Shuttle trains do not wait on a stage or a lock outage. They took the northern tier first, and that is still where the water lost the most grain. In the last few years they have moved farther south, off the river, where a truck can reach a train without seeing a lock.
A house northeast of the upper river has gone from a 25-car track toward a 100-car shuttle. In September 2026 the first unit train left a new 115-car loop in south-central Illinois. That is not a dock at Beardstown. It is the same bid, farther into the draw that used to belong to the central river.
Split the crops. They do not move for the same reason.
Corn goes to ethanol plants and wet mills. Those houses will pay across a wide draw, and the truck still makes the first move off the farm. When the Illinois is down, some of that corn goes to Mississippi houses instead.
Soybeans go to crush. Traditional crush plus Renewable diesel can create large demand for the beans and take them from the river. Off the Kaskaskia, the nearby substitutes are Chester, the houses below St. Louis, and rail.
None of that replaces the Illinois River. It means the river has to be reliable and the rate has to competitive to keep the grain on the water.
What Has to Change
NESP is the Navigation and Ecosystem Sustainability Program, the Corps program authorized in 2007 for the Upper Mississippi River System: Minneapolis to Cairo, the Illinois Waterway, and the navigable pieces of the Minnesota, St. Croix, Black, and Kaskaskia. Two jobs in one name. New lock capacity, and ecosystem work on islands, side channels, and backwaters. The navigation piece includes seven new 1,200-foot chambers: Locks 20, 21, 22, 24, and 25 on the Upper Mississippi, Peoria and LaGrange on the Illinois. One lockage for a 15-barge tow.
The 2021 infrastructure law fully funded Lock 25. That project is the pathfinder; foundation and site work are moving toward construction awards. LaGrange is the Illinois lock with real money: roughly $70 million-plus in directed spending for design, a 100-percent design contract, and a 2024 Phase 1 fabrication award for gates, machinery, and valves. The new chamber would sit landward of the existing 600-foot lock, which stays as an auxiliary. Construction funding is still the hole. Peoria is authorized and not funded to the same stage. A design is not a lock in the water.
The rest is ordinary work, and it decides whether the grain stays. Schedule maintenance around the crop, the way 2020, 2023, and Lockport 2026 were scheduled. Dredge Peoria Lake and the lower river as a program, not a drought panic. Keep Costello staffed; a new conveyor at Baldwin does not matter if the lock is dark. Keep commercial traffic moving at Brandon Road while the carp project is built. Watch USDA's weekly Illinois River barge rate as a percent of tariff. When that number jumps, the bid has already moved.
Operator's Scorecard
Measure | Illinois Waterway | Kaskaskia River |
Length | 336 miles, Chicago to Grafton | 36 navigable miles |
Cargo | Grain down; fertilizer, chemicals, petroleum, manufactures up | Steel, fertilizer, stone, gypsum in; grain at a few docks |
Channel | 9 ft authorized; 8 ft 6 in a common load | 9 ft; 225-ft authorized width |
Locks / tows | 8 locks; seven 110×600; O'Brien 1,000 ft; 15-barge tows double-lock; wickets at Peoria and LaGrange | Costello only, 84×600; two barges wide; no spare chamber |
Loading | Peoria reach, Havana, Beardstown, Meredosia, Naples, Valley City | Evansville / Kempers Landing; Baldwin; Chester cluster |
Risk | Stage, ice, 1930s 600-ft chambers, Peoria Lake sediment, Mississippi below St. Louis | Mississippi high water at the mouth; single lock |
Alternatives | Shuttle rail, processors, Mississippi houses | Chester / lower Mississippi, rail |
GG50 Operator Take
The Illinois is a 9-foot river on paper, and a lot of the grain still leaves at 8 feet 6. Lock time, Peoria Lake, and the Mississippi below St. Louis decide what actually moves. The grain is there. The demand is there. Rail and crush will take whatever the river cannot move on time or competitively. LaGrange is the right lock to start with. It is still a drawing and a fabrication contract, not a 1,200-foot working chamber.
The Kaskaskia is simpler. One lock. Keep Costello working and the southwestern Illinois docks stay in the game. Lose it, and there is no second door.
Next up is the water that has to carry this grain after Grafton: the Middle Mississippi, the St. Louis harbor rebuild, and why a clean Illinois load can still get expensive before it sees salt water.
Thank you for reading. Feedback from elevators, processors, terminals, and anyone who watches how grain gets to market helps shape this series.
Regards,
Grain Guy Fifty
Link to Glossary: https://www.grainguyfifty.com/post/the-gg50-america-s-working-waterway-vocabulary-glossary-of-terms
Sources
U.S. Army Corps of Engineers, Rock Island District: Illinois Waterway length, locks, chamber dimensions, lifts, channel authorization, lock traffic, wicket dams, maintenance history, LaGrange and Peoria projects, Brandon Road.
U.S. Army Corps of Engineers, St. Louis District: Kaskaskia River navigation, Jerry F. Costello Lock and Dam, Melvin Price Lock and Dam, Locks 27, and downstream navigation.
USDA Agricultural Marketing Service: Illinois River barge rates, grain movement, lock-delay impacts, 2019 and 2020 disruptions, and modal shifts.
Illinois State Water Survey: Peoria Lake sedimentation and capacity loss.
Kaskaskia Regional Port District: Port history, terminal facilities, Baldwin conveyor replacement, and local cargo activity.
Corps NESP program materials and appropriations records: NESP authorization, Lock 25 status, LaGrange design and fabrication funding, and Peoria project status.
Illinois historical and water-management sources: Illinois and Michigan Canal, Chicago River reversal, Chicago Sanitary and Ship Canal, and Chicago-area navigation.
Company and trade sources: Terminal references, operator activity, and facility-specific details; dated and verified before publication.
Comments