A narrow, two-lane bridge in Smithtown has reopened after being closed for nearly a month for an $80,000 concrete maintenance project, according to Suffolk County officials.

The Landing Avenue Bridge, which spans the Nissequogue River, had been closed since July 24 as part of a construction project to address the issue of cracking concrete. About a third of the deck -- the surface of the bridge over which cars drive -- was removed and the concrete was replaced, Suffolk County Commissioner of Public Works Gilbert Anderson said Monday.

"The main reason the bridge was shut down was so that we could remove the deck, replace the concrete and give the concrete time to cure properly," he said. "The weather worked in our favor. It was almost perfect weather to do a bridge deck."

Officials had pegged the concrete replacement work to take about three weeks.

It's unclear how long the remainder of minor repairs to the abutment or structure surrounding the deck will take, Anderson said.

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The bridge, built in 1928, is a major artery that connects to Main Street in Smithtown. It last underwent major work in 1987.

Anderson said that the most recent repairs should last "at least 20 or 30 years without any problems."

"It could last 30 years, it could last 50," he said. "A lot depends on weather, traffic volume."