A single fifteen-barge tow on the Mississippi River carries as much cargo as a thousand semi trucks. Fuel, fertilizer, grain — it all moves by water because nothing else comes close on cost. Over sixty-five percent of America's agricultural exports travel the Mississippi to reach the world.

But for four years running, drought has been dropping water levels on the river. When the water gets low, barges carry lighter loads. Lighter loads mean more trips. More trips mean higher costs. In 2024, barge rates jumped nearly sixty percent above their three-year average. Those costs flow straight through to fuel prices, fertilizer prices, and grocery prices across the Midwest — including Wisconsin.

And this isn't a one-time event. Scientists say these swings between extreme wet and extreme dry are becoming more frequent. The river that keeps the Midwest economy moving is becoming less reliable — and there's no backup system that can replace it.

Learn More

Barges are enormously efficient. A standard 15-barge tow carries as much cargo as 1,050 semi trucks or 216 train cars. This is why bulk commodities — fuel, fertilizer, grain, construction materials — move by water whenever possible. (Waterways Council)

The Mississippi is America's agricultural highway. Over 65% of U.S. agricultural exports bound for international markets move on the inland waterway system. Ninety-two percent of agricultural exports pass through the Mississippi River Basin. (Wisconsin Watch / Inside Climate News; National Park Service)

Four consecutive years of drought have hammered river levels. In 2022, Memphis recorded water levels 11 feet below the historic average. Barges grounded in 2022 and 2023. The Army Corps of Engineers has had to dredge earlier than normal each year. By early September 2024, barge rates from St. Louis had jumped 57% above their three-year average. (USDA via Inside Climate News)

The costs flow downstream to consumers. Mississippi River mayors warned that fuel prices jumped roughly 20 cents overnight along the river in 2026 due to the combined effects of the Iran conflict and rising transportation costs. (ABC News)

The climate pattern is getting worse. Ohio State climatologist Aaron Wilson has documented an emerging pattern of rapid oscillation between extreme wet and extreme dry conditions. The Fifth National Climate Assessment found 5-15% precipitation increases across the Midwest over 30 years, but with much more extreme variability — meaning bigger floods AND bigger droughts. (Fast Company)

Wisconsin connection: A Wisconsin-based tug pilot, Captain Mike Napper, explained the economics: lighter loads mean more trips, which means higher costs for everything that moves by barge. Some Wisconsin soy growers are investing in new export terminals — including one on Lake Michigan in Milwaukee — to reduce dependence on the Mississippi route. (WVIK/NPR)

Related Civic Minute segments: How Gas Gets to Your Pump (CM-25), When Gas Goes Up, Everything Goes Up (CM-26)