engineering

Wisconsin butter fire

Wisconsin butter fire is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Wisconsin butter fire rather than just read about it. In short: The Wisconsin butter fire, also known as the butter flood, great cheese fire, and great butter fire, was a fire and flood of processed meat and dairy that began on May 3, 1991, at a large storage facility in Madison, Wisconsin. The fire continued for eight days; there were no fatalities, but it caused millions of dollars in damages.

Key takeaways

Wisconsin butter fire belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Wisconsin butter fire to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Wisconsin butter fire from memory before moving on to harder problems.

Reference excerpt

The Wisconsin butter fire, also known as the butter flood, great cheese fire, and great butter fire, was a fire and flood of processed meat and dairy that began on May 3, 1991, at a large storage facility in Madison, Wisconsin. The fire continued for eight days; there were no fatalities, but it caused millions of dollars in damages. The incident is known as the biggest commercial fire in Wisconsin state history and the Madison Fire Department's biggest and most expensive challenge.

Background The fire occurred as America's butter surplus was near its peak, when the US government purchased excess quantities of surplus cheese and butter in efforts to keep prices stable. Due to the overzealous government purchasing, farmers increased production of milk and butterfat by 30 percent between 1974 and 1990 even though consumer demand was not increasing. A Wisconsin State Journal article titled "The butter cup runneth over" from April 1990 reported that 330 million pounds (150,000 tonnes) of dairy products were sitting in warehouses.

The fire and the flood

First flames On May 3, 1991, flames broke out in the late afternoon at the Central Storage and Warehouse Company on Cottage Grove Road, a 500,000-square-foot (46,000 m2) complex that stored 10 to 15 million pounds (4,500 to 6,800 tonnes) of government surplus butter. At the time of the fire, the building also stored Ocean Spray cranberries and "millions and millions of hot dogs", according to an employee. Oscar Mayer stored 4 million pounds (1,800 tonnes) of sausages in the facility. Building owner Ken Williams stated that the fire grew so quickly that "the sprinkler systems were not able to even work." According to a Wisconsin Department of Natural Resources report, the damages included bakery products, hams, and 1,000 pounds (450 kg) of anhydrous ammonia. It took about twenty hours to contain the blaze, and eight days until the fire was officially out. A firefighter reported flames 300 feet (91 m) high. There were about twenty-five employees present at the factory, and none were injured. Due to the thick, fatty pool of dairy, ladder trucks could not effectively enter and leave the area, nor could fuel trucks enter to refill the ladder trucks' gas tanks. Instead, mechanics traveled through the butter river on foot with five-US-gallon (19 L; 4.2 imp gal) buckets of diesel fuel. Spraying water at the building caused more gooey melted cheese and butter to flow out. Nearly 3,000 nearby Madison residents were evacuated on Friday night and moved to a high school because firefighters thought the flames might spread. The neighbors reported a horrible stench.

Butter flood After about two and a half hours, the fire spread to a second factory building. Five hours later the building collapsed, creating a massive wave of melted butter. The fire threatened the facility's anhydrous ammonia tanks. "Once the walls caved in, [the butter] came out like a river", said fire lieutenant Berggren. City Engineering crews constructed levees to contain the dairy and lard. Firefighters had to wade through viscous, slippery pools of butter and cheese that were two to three feet (60 to 90 cm) high with five-foot (1.5 m) deep ponds in some places. The melted dairy made it difficult to use typical equipment, so firefighters remained outside the building, trudging upstream through a hot flow. Firefighter Steven Davis reported having "butter in places a guy shouldn't have butter by the end of that night."

Cleanup and legacy The Environmental Protection Agency states that butter spills have similar effects on wildlife to petroleum-based oil spills. The Wisconsin Department of Natural Resources worked to prevent the river of butter and cheese from clogging tubes and polluting local bodies of water. To contain the sludgy runoff of dairy, it constructed multiple dams to protect Starkweather Creek, which feeds into Lake Monona. City employees of Madison steered the butter river into a storm water discharge pond near the highway, but when the pond overflowed, some of its contents were pumped across the railroad tracks into another pond. The fire and subsequent dairy flood caused major financial losses, including $7.5 million in property damages ($17.7 million in 2025), $70 million in contents ($165 million in 2025), and nearly $1 million ($2.36 million in 2025) in fire control costs. The cleanup cost approximately $550,000 ($1.3 million in 2025), and was mostly paid by the Central Storage and Warehouse Company and a grant from the USDA. On May 7, 1991, arson investigators ruled the fire to be an accident that originated near a battery-propelled forklift. An informal year-end survey by The Capital Times named the Butter Fire the most important local news story of 1991. In October 2011, more than twenty years after the flames, the Central Storage and Warehouse company finished reconstruction along with a 42,000-square-foot (3,900 m2) freezer.

Illustrations

Worked examples

Example 1 — a first encounter with Wisconsin butter fire

Start with the simplest possible case. Write down what Wisconsin butter fire claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Wisconsin butter fire before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Wisconsin butter fire ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Wisconsin butter fire

In research: Wisconsin butter fire appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Wisconsin butter fire in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Wisconsin butter fire is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1991 fires in the United States, Engineering failures, Food processing disasters, so understanding it makes those chapters shorter.
In everyday life: Look for Wisconsin butter fire outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Wisconsin butter fire in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Wisconsin butter fire means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Wisconsin butter fire out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Wisconsin butter fire in simple terms?

Why does Wisconsin butter fire matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Wisconsin butter fire?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Wisconsin butter fire.