Chunk of Tappan Zee Bridge demolished

A big chunk of the Tappan Zee Bridge went down in history — and into the Hudson — on Tuesday after a detonation that thrilled onlookers who played hooky from work and school to watch the spectacle.

Despite a few delays, the crowds had cameras at the ready when a boom shook the ground and rattled trees. Acrid black smoke filled the air as the structure dropped straight into the river. It remained about half submerged; the remnants will be salvaged and recycled.

“The fact that you can feel the concussion against your legs was crazy,” said Kathleen Staab, who watched from about three-fourths of a kilometer away.

The structure has already been replaced by the Gov. Mario M. Cuomo Bridge, which carries Interstate 87 traffic between Westchester and Rockland counties, about 50 kilometers north of New York City, at one of the broad Hudson River’s widest spots. The new bridge, which parallels the old one, was closed to traffic during the demolition.

A lighthearted mood prevailed as spectators, bundled against the cold, gathered outside the historic Lyndhurst Mansion.

“My boss let me go,” said Catherine Easton, 56. “I was going to make up a story, but I decided to tell the truth.”

Easton, 56, drove from Redding, Conn., with her boyfriend. “We saw our first fireworks together with the bridge in the background,” she said. “So we have a sentimental thing with the bridge and we wanted to wish it goodbye.”

Staab, 45, of Sussex, N.J., went there with her sons, ages 10, 7 and 4. “They’re playing hooky,” she said. “I’d rather them experience history than read about it.”

She said: “It was always a neat bridge to drive over, and the views were always so beautiful. But it is always kind of sad to see a piece of history implode."