ANSONIA — After 31 years of building roads, installing sewers and handling state and municipal contracts, Complete Construction is calling it quits, liquidating heavy equipment and looking to sell its office.

“I have a feeling they’re not going to be the last one,” said Don Shubert, president of the Connecticut Construction Industry Association, of which Complete was one 300 members. “There are a lot of highway contractors out there that have little if any work. And those that have work have no backlogs.”

As a result, Shubert said, “a lot of contractors have no idea where their next job is coming from.”

Connecticut’s economy is the problem, said Shubert and Guy DeMaio Jr, one of Complete’s owners.

“Generally the outlook in Connecticut is rather grim,” said DeMaio, of Orange, who along with Antonio Teixeira, of Shelton, owns Complete. “We determined it would be too difficult to continue in this business climate. The work isn’t there.”

Shubert said the state has pulled back $4.3 billion in transportation projects.

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“We estimate that every billion spent represents 15,000 jobs,” Shubert said.

Shubert said the Department of Transportation has deferred $63 million in projects already, “and that could rise to $550 million by the end of the year.”

The state also reduced funding to municipalities, leading to delays in local road, sewer and sidewalk projects.

Those jobs that are going forward attract a lot of bidders, Shubert said.

“Bidding is very aggressive, and we’re seeing super low prices,” he said. “Most companies are working on very low margins. You would think the state would want to take advantage of these low costs.”

So when a company like Complete, which was on the state DOT’s pre-qualified list of construction firms, shuts down, that impact resonates across the industry.

“They won’t be buying materials or equipment, they won’t be sending equipment in for repairs,” Shubert said.

DeMaio said Complete plans to finish its current contracts and then shut down by the end of the year.

“We have a gravel pit in Milford that will probably be operating a little longer,” DeMaio said.

Over the years, Complete Construction rebuilt sections of Whalley Avenue in New Haven, Campbell Avenue near West Haven City Hall and the parking lot at the Ansonia Nature Center. Last summer the company reconstructed a portion of Derby-Milford Road.

“We did bridges, sewers, street scapes like Campbell Avenue,” DeMaio said. Both he and co-owner Teixeira are in their 60s.

Ansonia Mayor David Cassetti, who formerly operated Birm-1 Construction and competed with Complete Construction, said he is sorry to see them go.

“They were a competitor but they were very good contractors,” he said. “Their work was excellent.”

Sheila O’Malley, Ansonia’s economic development director, said Complete’s closing “is a big loss for the Valley.”

“They are good people to work with,” she said. “They have a great reputation and a lot of experience that we are losing. I hate to see them go.”

Once word leaked out, O’Malley said, inquiries began coming it about the building they own on Riverside Drive.

“Their building is about 10,000 square feet and they own 47 adjacent acres,” she said.

DeMaio said his company opened on Bridgeport’s Kossuth Street, then moved to the Riverside Drive, known as the Woodlot — just across the river from the old American Brass Co. — some 20 years ago.

He said at the height of business, Complete employed about 60 workers.

“We’re down to about six or seven now,” DeMaio said. “The Connecticut economy has been deteriorating for a long time and the outlook is not much better. That’s the way we feel.”