A four-year-old letter obtained by Quincy city officials indicates that the construction company hired to demolish the Long Island Bridge in 2015 believed the piers that had supported it could not be used to support another bridge without significant upgrades, according to a report last week in the Patriot Ledger of Quincy.

In a Sept. 25, 2015 letter, Walsh Construction Company said the piers that held the old Long Island Bridge were structurally deficient and not up to code, the Ledger reported. Boston closed the old bridge in 2014 with little notice, citing safety concerns. Last year, Boston Mayor Martin Walsh said he planned to build a replacement bridge, an announcement that left Quincy officials unhappy.

The Patriot Ledger story quoted Quincy officials as saying “the letter, which they received through a subpoena in one of the city’s ongoing lawsuits fighting Boston’s plan to rebuild the bridge, supports their assertion that the piers are too old and deteriorated to support a new bridge.”