Demolition of damaged and faulty concrete structures at the Binghamton-Johnson City Joint Sewage Treatment Plant could start in a few weeks.

The biological aerated filtration system at the facility in the town of Vestal sustained heavy damage when a wall collapsed in May 2011.

Binghamton city engineer Philip Krey says the advance demolition project is now being advertised.

Krey told WNBF News some concrete sections will be taken down as part of the planned work. The filter media in the damaged area is to be removed and stored.

The material used for the aerated filtration process will be kept elsewhere to provide more space for a major rehabilitation project that is expected to begin next year.

Krey said bids are due April 3. He expects the demolition project could get underway in early May.