Teepee Burners:

The Fires That Lit Montana’s Sawmill Towns

Introduction

For nearly a century, a peculiar silhouette rose over the mill towns of western Montana: a cone of riveted sheet metal, forty to seventy feet high, glowing orange at its open crown after dark. Millworkers and their families called it a teepee burner, or sometimes a wigwam burner, and its job was unglamorous but essential. It consumed the mountain of bark, sawdust, and slab wood that a sawmill could not sell, sparing the mill yard from burying itself in its own waste. The structure was never meant to be beautiful, and no one who worked near one mistook it for anything but an industrial necessity. Yet its shape, borrowed unselfconsciously from Indigenous dwellings it did not resemble in function, became one of the most recognizable landmarks of Montana’s timber economy, and its slow disappearance after the 1960s marks one of the clearest points where that economy collided with a changing legal and environmental order.

The Waste Problem of an Industrial Sawmill

A sawmill does not turn a log entirely into lumber. Bark must be stripped, slabs cut away, and boards planed to size, and each of those steps produces a byproduct that has no immediate market. In the nineteenth century, a large mill running at capacity for a single season could produce this residue by the trainload, and mill operators had few good options besides burning it. A wood-waste burner was designed for exactly that task, receiving sawdust and scrap by conveyor belt or screw feed near the top of the cone and dropping it onto a fire maintained at the structure’s center, with underfire and overfire air feeding the combustion and a screened opening at the crown meant to hold back sparks while venting smoke the burner was a conical or wigwam-shaped metal enclosure into which wood wastes and bark residues were conveyed and dropped for burning, with air fed through a grate at the base and additional air introduced above the fire. The engineering was never especially refined. One later patent filing looking back on the design was blunt about its limitations, describing it candidly as inefficient and prone to producing noxious gases and ash even by the standards of its own era wood residue from sawmills was traditionally disposed of by direct burning in an incinerator known in the trade as a teepee burner, a design later characterized as old-fashioned, inefficient, and productive of noxious gases and ash. That trade-off between simplicity and pollution would define the structure’s entire working life.

Montana’s Timber Boom and the Rise of Bonner and Milltown

Montana’s version of this story is inseparable from the Blackfoot River corridor east of Missoula. Entrepreneur Andrew Hammond, together with partners E. L. Bonner, Richard Eddy, and others, organized the Montana Improvement Company in 1882 with backing from the Northern Pacific Railroad, which needed enormous quantities of timber for ties, bridges, and construction as its transcontinental line pushed across the territory the Montana Improvement Company was formed on August 1, 1882, by Andrew Hammond, Richard Eddy, E. L. Bonner, and M. J. Connell together with Marcus Daly and Washington Dunn, with the Northern Pacific Railroad providing most of the capital. The company’s first permanent sawmill, completed in June 1886 at the confluence of the Big Blackfoot and Clark Fork Rivers, was by contemporary accounts the largest mill built between Wisconsin and the Pacific Coast, and the company town of Bonner grew up around it the Improvement Company completed its first permanent sawmill at the meeting of the Big Blackfoot and Clark Fork Rivers, described as the largest mill in the territory and between Wisconsin and the West Coastthe Blackfoot, or Bonner, mill was constructed on 160 acres and completed in 1886, with housing built for superintendents and skilled workers, giving rise to the company town of Bonner. In 1898 Hammond sold the mill and its timberlands, roughly five hundred million board feet, to Marcus Daly’s Anaconda Copper Mining Company for approximately $1.5 million, a deal driven by Daly’s need for mine timbers to shore up his underground workings in Butte Hammond sold the Big Blackfoot Milling and Manufacturing Company and its timberlands of roughly 500 million board feet to Daly’s Anaconda Copper Mining Company on August 15, 1898, for nearly $1.5 million, though the mill retained its original corporate name until 1910. A rival operation soon appeared close by: W. A. Clark’s interests built a dam at the river confluence in 1907 to supply electric power to Missoula and Bonner, establishing the community of Milltown and a competing sawmill that Anaconda eventually absorbed W. A. Clark’s interests constructed a dam at the confluence of the Big Blackfoot and Clark Fork Rivers in 1907 to supply power to Missoula and Bonner, establishing Milltown and a sawmill, which the Anaconda Copper Mining Company purchased along with the Western Lumber Company’s holdings in 1928. Anaconda’s Bonner operation would run, in one form or another, for well over a century, becoming by the 1920s and 1930s a major supplier of mine timbers, reportedly producing thousands of truckloads of lumber annually for Butte’s mine shafts alone, a figure that appears in trade press coverage but is not independently confirmed elsewhere the Anaconda Copper Mining Company’s sawmill in Bonner produced 8,000 truckloads of lumber a year just to line mine shafts in the 1920s and 1930s, cutting old-growth timber from land that is now the Lubrecht Experimental Forest. Every mill of this scale needed a burner, and photographic collections from the Bonner and Missoula area document them clearly: one University of Montana archival photograph shows a teepee burner operating at the L. A. Hamilton Lumber Company in Missoula, and another shows one rising beside the smokestacks of the old Western Lumber Company mill at Milltown a photograph in the University of Montana Mansfield Library’s collection depicts a teepee burner at the L. A. Hamilton Lumber Company in Missoula, described as an important part of the region’s forest products industryanother archival photograph shows the old Western Lumber Company sawmill at Milltown, including its smoke stacks, water tower, and teepee burner.

Burners Across the State’s Mill Towns

Bonner and Milltown were not unique. Wherever Montana had a sawmill of any size, a burner was likely to stand beside it, and surviving examples show how similar the design remained from one operation to the next. At the S&W Sawmill in Conner, in the Bitterroot Valley south of Hamilton, a tipi burner operated until the mill’s closure, after which it stood at the Ravalli County Fairgrounds until 1973, when the Society of American Foresters undertook a two-year project to move it to the Historical Museum at Fort Missoula, dismantling the structure into eighteen panels for transport and reassembling it with a new fiberglass mesh cap painted to suggest the burner’s characteristic glow this tipi burner was originally used at the S&W Sawmill in Conner, Montana, and stood at the Ravalli County Fairgrounds in Hamilton until 1973, when the Society of American Foresters brought it to the Historical Museum at Fort Missoula over a two-year process, dismantling the building into eighteen panels and reassembling it with a new fiberglass mesh top painted to resemble its historic glow. Farther north, in the Upper Blackfoot Valley near Lincoln, the Delaney and Sons sawmill at Landers Fork operated as the largest and most modern mill in the valley, employing more than a hundred men during peak summer seasons in the mid-1960s before closing in 1971, after which its teepee burner remained standing on the landscape for decades, a seventy-five-foot cone with a forty-five-foot base diameter the Delaney and Sons sawmill at Landers Fork was the largest and most modern sawmill in the Upper Blackfoot Valley, employing over one hundred men during peak summer periods in 1965, before the mill closed in 1971 and its machinery was removed, leaving the teepee burner on the landscape; the structure stood seventy-five feet tall with a forty-five-foot base diameter. Local residents recalled the burner glowing through the night as it consumed wood refuse continuously while the mill ran, a detail collected directly from community members during a later preservation effort during visits to the Lincoln area, an artist collected stories from residents who recalled the teepee burner glowing at night as it burned wood refuse around the clock while the mill operated. Montana History Portal’s finding aids for the University of Montana’s archival photograph collections list teepee burners as a distinct subject category numbering in the dozens of catalogued images, evidence of how ordinary a fixture the structures were across the state’s mill communities, alongside the Anaconda Copper Mining Company, the Missoula White Pine Sash Company, and the Polleys Lumber Company the Montana History Portal’s browsing categories list teepee burners among twenty-five catalogued subject entries, alongside dozens of images tagged to sawmills, the Anaconda Copper Mining Company, the Missoula White Pine Sash Company, and the Polleys Lumber Company.

Decline, Regulation, and the End of an Era

The burner’s undoing came from the same smoke that had always poured from its crown. By the 1970s, tightening air quality standards under state and federal law made the open, unfiltered combustion of wood waste increasingly difficult to justify, and mills across the Pacific Northwest and Montana began shutting their burners down or converting to enclosed systems that captured waste heat instead of releasing it even the most modern sawmills struggle to turn half the volume of a log into lumber, and in North America much of the resulting waste had historically been burned in the tall, conical structures known in the United States as teepee or wigwam burners. In Washington state, regulators later recalled that wigwam burners had been defended by industry through the 1960s and 1970s as clean and efficient, a claim regulators did not accept, and outright state bans did not arrive until decades after enforcement efforts began regional air quality staff spent their early years tackling sawmill wood-waste burners, known colloquially as wigwam burners, which industry considered clean and efficient waste burners, though those burner types were not finally banned by state law until 2005. On tribal lands, the federal government eventually imposed its own explicit phase-out. A rule codified in the Code of Federal Regulations required that woodwaste burners, identified there by their common names of wigwam or teepee burners, be shut down and dismantled within a fixed period after the rule’s effective date, with interim limits on visible emissions in the meantime, a provision that applied specifically within Indian reservation boundaries rather than statewide a federal rule phased out the operation of woodwaste burners, commonly known as wigwam or teepee burners, requiring that any such burner be shut down and dismantled no later than two years after the rule’s effective date, while limiting visible emissions in the interim, with the requirement applying to any person who owns or operates a woodwaste burner within the affected Indian reservation. Montana’s own burners fell one by one through this same period, less often through a single dramatic ban than through mill closures, conversions to biomass boilers, and the accumulating weight of state and federal air rules that made continued open burning impractical.

Preservation and Memory

A handful of Montana’s burners escaped the scrapyard by becoming monuments to the industry that built them. The Fort Missoula example now stands as a preserved structure at the Historical Museum at Fort Missoula, its reassembled panels a direct physical link to the Bitterroot Valley mill that built it. The Delaney sawmill burner near Lincoln took a different path: in 2014, sculptor Kevin O’Dwyer proposed relocating it into what became Blackfoot Pathways: Sculpture in the Wild, and the following year the structure’s interior was fitted with steel plates printed with archival photographs of the valley’s logging history, transforming the burner into both artifact and gallery space forty-five feet across the teepee burner was dismantled and moved to the sculpture park in September 2014, its base rebuilt by community volunteers, and in September 2015 black-and-white archival images were printed on steel plate and mounted inside the burner, creating an interior space forty-five feet in diameter usable for community education and performance. Bonner’s own mill complex, meanwhile, ran under Anaconda and its corporate successors for more than a century, with local accounts differing slightly on the precise year of final closure, one placing it in 2007 and another in 2008, a discrepancy that likely reflects the gap between a plant’s last operating shift and its formal closure lumber and plywood mills in Bonner and Milltown employed hundreds of workers through the twentieth century before the final plant closed in 2007. What remains today, in scattered fields and museum yards from the Bitterroot to the Blackfoot, are cones of rusting sheet metal that no longer burn anything, kept upright now for what they represent rather than what they do.

Conclusion

The teepee burner was never designed to last, and most of Montana’s examples did not. They were working structures built to solve an immediate problem of industrial waste, and when regulation and changing economics made that solution untenable, the great majority were dismantled, scrapped, or simply left to collapse where they stood. The few that survive, at Fort Missoula and at Blackfoot Pathways near Lincoln, endure because someone made a deliberate choice to keep them, recognizing that the state’s timber history needed a physical marker as blunt and unromantic as the industry itself. They are not monuments to conservation success or to environmental failure alone, but to an ordinary piece of industrial infrastructure that, in outliving its usefulness, became an accidental landmark of how Montana’s mill towns actually worked.

Works Cited

Bonner Milltown History Center. “The Anaconda Company.” Bonner Milltown History Center, bonnermilltownhistory.org/the-anaconda-company. Accessed 31 July 2026.

Bonner Milltown History Center. “The Sawmills.” Bonner Milltown History Center, bonnermilltownhistory.org/industries/the-sawmills/. Accessed 31 July 2026.

Fulton, Tom. “Teepee Burner.” Montana History Portal, University of Montana Mansfield Library, mtmemory.org/nodes/view/15261. Accessed 31 July 2026.

“History of ORCAA.” Olympic Region Clean Air Agency, orcaa.org/about/history-of-orcaa/. Accessed 31 July 2026.

“History of Logging in Missoula Montana.” Forestry Days, forestrydays.com/History-of-Logging-in-Missoula-Montana/. Accessed 31 July 2026.

“Old Western Sawmill.” Montana History Portal, University of Montana Mansfield Library, Jack L. Demmons’ Photographs of Bonner, Montana Collection, mtmemory.org/nodes/view/26091. Accessed 31 July 2026.

O’Dwyer, Kevin. “Montana Memory: Re-Imagining the Delaney Sawmill TeePee Burner.” Sculpture in the Wild, sculptureinthewild.com/re-imagining-the-delaney-sawmill-teepee-burner.html. Accessed 31 July 2026.

“Timber Legacy Offers Few Lessons for Industry Future.” Montana Standard, mtstandard.com/news/state-and-regional/timber-legacy-offers-few-lessons-for-industry-future/article_1635e2c6-f78c-501e-bd2d-a021cd4e16bc.html. Accessed 31 July 2026.

“Tipi-Burner.” Fort Missoula Buildings, Historical Museum at Fort Missoula, buildings.fortmissoulamuseum.org/tipi-burner/. Accessed 31 July 2026.

“Anaconda Forest Products Company Records.” Archives West, Orbis Cascade Alliance, archiveswest.orbiscascade.org/ark:80444/xv60538. Accessed 31 July 2026.

40 CFR § 49.127. “Rule for Woodwaste Burners.” Legal Information Institute, Cornell Law School, law.cornell.edu/cfr/text/40/49.127. Accessed 31 July 2026.

“Sawmills: Chopping Down Waste.” Waste Management World, ISWA, waste-management-world.com/artikel/sawmills-chopping-down-waste/. Accessed 31 July 2026.