Susquehanna FootprintsStories from the Susquehanna Valley

After Avondale: Northumberland County’s Deadly Years in the Mines

November 05, 2026 · Terry Diener

On September 6, 1869, fire at the Avondale Colliery near Plymouth, Luzerne County, claimed 110 lives, including two rescuers. Flames consumed the wooden structures over the mine’s only shaft, leaving the men and boys below without a safe escape.

The tragedy stirred Pennsylvania to strengthen its mining laws. Separate escape routes, better ventilation, accurate mine maps, and state inspection became central to the effort to protect miners. But in Northumberland County, the years that followed brought painful reminders that legislation alone could not make the coal mines safe.

On June 10, 1873, less than four years after Avondale, a gas explosion at the Henry Clay Colliery near Shamokin killed ten men. Coal helped sustain the region’s communities, but the work of bringing it to the surface carried dangers that could turn an ordinary shift into a catastrophe.

Eleven years later, on August 21, 1884, fire at the Buck Ridge Colliery in the Shamokin area claimed seven lives. Once again, fire underground proved deadly. For miners, the danger extended beyond the flames themselves: smoke could travel through the workings, making familiar passages impossible to cross.

One of the county’s most tragic mine fires came on April 1, 1893, at the Neilson Colliery in Shamokin.

According to the mine inspector’s account, a worker was filling or tending an oil torch near the bottom of the shaft when the oil can ignited. Fire spread to an oil shanty and nearby timbers. Although the ground immediately around the shaft was wet, much of the mine was dry, allowing the flames to spread rapidly.

Smoke swept through an airway and a connecting tunnel, cutting off ten men working in another seam. Rescuers struggled for about two hours to reach them. By the time they arrived, all ten were dead.

Nearly twenty-four years after Avondale, a fire near a mine shaft had again robbed underground workers of their chance to escape.

Then came a particularly sorrowful week in October 1894.

On October 8, a fire associated with an ignition or explosion at the Luke Fidler Colliery near Shamokin killed five people. The Pennsylvania State Archives describes a carpenter carrying a lamp into the workings and setting off the explosion. The disaster also disrupted the connected Hickory Ridge operation, leaving both collieries closed for months.

Just three days later, on October 11, a boiler explosion at the Henry Clay Colliery killed six more. The same colliery that had lost ten men in 1873 was again the scene of mourning.

The October 11th evening edition of the Sunbury Daily Item reported, “the entire steam supplying plant of the mine, consisting of thirty-six boilers, was totally demolished, and in addition to the monetary loss, which will aggregate $35,000, the Henry Clay, Big Mountain, Sterling and Peerless Collieries will be unable to resume operations for at least a month.”

The newspaper reported the boilers were scattered in several directions. “The scene of the wreck presents a wild confusion of debris -boilers, fragments of steam pipes, castings, brick and mortar. Some of the boilers were broken completely in half, the two parts flying in different directions. The force of the explosion drove several of the boilers end-ways into the dirt banks, leaving only a small portion sticking out. Half of one was hurled a quarter of a mile from the spot and lodged in the slush bank northwest of where the boiler house stood. Some were lifted over a high bank and thrown down the hill on the other side.”

Together, the five disasters between 1873 and 1894, claimed thirty-eight lives. They also revealed the different dangers surrounding the industry: explosive gas, underground fire, suffocating smoke, and the powerful machinery needed to operate a colliery.

Their toll tells only part of the story. These were the multiple-fatality disasters recorded in the official lists. They do not include the individual miners killed in separate accidents—the losses that seldom became widely remembered events.

For families around Shamokin and throughout the county’s coal communities, mining safety was a matter of whether someone came home at the end of a shift.

Avondale helped change Pennsylvania’s laws. Henry Clay, Buck Ridge, Neilson, and Luke Fidler showed how much work remained. Behind every date and death toll were people whose labor sustained the region, and whose lives deserve a place in its memory.


Credits: Sources: Pennsylvania Department of Mines, Anthracite Division, 1951 Annual Report, historical disaster table; U.S. Bureau of Mines, Coal-Mine Fatalities in the United States, 1927; U.S. Bureau of Mines, Historical Documentation of Major Coal-Mine Disasters … 1846–1962, reproducing the 1893 Neilson inspector’s account; Pennsylvania State Archives, Susquehanna Coal Company Records, Manuscript Group 463., Sunbury Evening Item, Sunbury, Pennsylvania, October 11, 1894, Page 01; Sketch: Internet Archive, Harper’s Weekly, September 25, 1869 (Cover Page)