The Castle Rock iron bridge is blown up

The destruction of Castle Stream Bridge, known to residents of Castle Rock as the Tin Bridge, is a carefully timed act of sabotage that turns the town’s religious riot into a broader crisis. When the dynamite planted by Ace Merrill explodes on October 15, 1991, the blast briefly silences the fighting on Castle Avenue; within seconds, a shouted accusation reignites it. The bridge is not merely damaged infrastructure: its fall becomes a spectacular, ambiguous event that redirects an already violent crowd toward a new round of conflict.

Preparation and timing

Ace places a blanket-wrapped package of dynamite in the elbow formed by two bridge struts. He attaches a blasting cap by inserting its stripped wires into a stick of dynamite, then turns the timer’s large white dial to forty. The mechanism begins ticking, and he scrambles back up the slippery bank. The explosives have been waterproofed, so their position beneath the bridge offers no protection from the rain and does not threaten the plan.

Ace and Danforth Keeton, whom Ace calls Buster, drive away about seven minutes before Alan Pangborn crosses the bridge. When they leave, the timer’s black marker stands at thirty. Their escape is not an isolated retreat: the pair continue slowly along Main Street, leaving small bundles of explosives as they go. The bridge charge is one part of a wider bombing campaign, and the interval between planting it and detonation places the attack amid the town’s unfolding disorder.

The explosion

At 7:38 p.m. on Tuesday, October 15, 1991, the timer reaches zero. Its small electrical burst is supposed to ring a bell, but it arcs across bare wires wrapped around the terminals of the nine-volt battery. The bell starts to ring; a split second later, the flash triggers the blasting cap and then the dynamite. The detail makes the timer’s intended signal almost absurdly small beside the force it releases: a tiny current becomes a blast that the few people who mistake it for thunder quickly recognize as a gigantic rifle shot.

The south end of the old iron bridge lifts from the bank on a squat ball of fire, rises perhaps ten feet, and drops back with a crunch of popping cement and clattering metal. The north end twists loose, and the whole structure falls askew into Castle Stream, then running high. The south end comes to rest on an elm already felled by lightning. The bridge’s familiar local name, the Tin Bridge, is exposed as a misnomer in the wreckage: it is made of old, rusty iron, and its destruction is rendered in iron, cement, flame, and water rather than in the imagined material of its nickname.

A pause in the riot

The blast reaches Castle Avenue while Catholics and Baptists are still fighting, with nearly a dozen State Police officers among them. Combatants who had been striking one another stop and stare toward the fire at the Castle Stream end of town. Albert Gendron and Phil Burgmeyer, who had been exchanging blows moments earlier, stand side by side in the glare. Blood runs down Gendron’s face, and Burgmeyer’s shirt is mostly torn away. The sudden spectacle momentarily suspends the immediate religious antagonism: for an instant, the fighters share an attention that their accusations and blows had not allowed.

Henry Payton uses the lull to try to take control. After losing a tooth in the fighting, he throws Tony Mislaburski aside, cups his hands around his wounded mouth, and begins ordering the crowd to stop. But Nan Roberts, accustomed to making herself heard over the noise of her diner kitchen, overwhelms him with a cry that the Catholics are using dynamite. Her declaration is not established as fact; it is an accusation made in the confusion after an explosion whose perpetrators are elsewhere. Its consequence is immediate. The pause collapses, and within seconds the fighting resumes as a dozen skirmishes along a fifty-yard stretch of rain-swept avenue.

Consequences and significance

The bridge’s destruction does not resolve the clash it interrupts. Instead, the blast becomes material for a fresh act of blame: Nan’s shouted claim turns an attack on the town into apparent evidence against one side of the religious feud. A moment in which Catholics and Baptists alike look toward the same fire gives way to renewed factional violence. The reversal shows how quickly a shared shock can be absorbed into the conflict already shaping the crowd.

For Castle Rock, the explosion makes the campaign against the town visible on a civic scale. The charge beneath the bridge is precisely prepared, timed, and detonated while the riot occupies the attention of residents and police; its consequences extend beyond the damaged crossing to the crowd’s behavior and the town’s failing order. The bridge falls into the swollen stream, while the accusation about who destroyed it sends the fighting back into motion. Its destruction is therefore both a physical rupture and a narrative hinge: the blast interrupts one violent sequence only long enough to launch another.