Work underway below the VIP Road flyover on Thursday. (Sanjoy Ghosh)
The collapsed Bypass-bound flank of the VIP Road flyover is being rebuilt with a deadline to reopen it by March, exactly a year after a 40-metre deck slab came crashing down with a marble-laden lorry.
Calcutta-based GPT Infraprojects Ltd started work on September 27, based on a reconstruction design approved by consultant Rites.
The possibility of a pier being raised from the canal underneath to support the new structure was nixed by the irrigation department, an official of the Calcutta Metropolitan Development Authority said.
Some experts had suggested an extra pier to strengthen the structure but sources said there was officially no such recommendation by the Jadavpur University team that investigated the collapse.
Officials of GPT Infraprojects were unavailable for comment.
The company is currently dredging the portion of the Kestopur canal underneath the 1.3km flyover to set up temporary ladders rising up to the height of the structure.
The reconstruction budget is Rs 14.29 crore, more than one-fifth the Rs 70 crore spent on building the entire flyover.
GPT Infraprojects was selected as the lowest bidder a few months ago but the contract wasn’t formalised until Rites completed its price evaluation in September.
A lone company had responded when the CMDA first invited bids to rebuild the flyover. The contract was put out to tender again on May 15 with some changes.
The delay in finding a willing contractor with the credentials to do the job has kept the Bypass flank out of bounds for traffic for more than six months.
Sources said the plan was to reopen the flyover between February and the first week of March.
The government had asked a JU team to test the stability of the intact portions of the flyover and the report was “positive”, a source said.
GPT Infraprojects will repeat the process. “We have asked the company to test the strength of the two spans on either side of the collapsed portion and also the parallel spans on the other flank,” a CMDA official said.