The price tag of the Riverhead Sewer District’s biosolids reduction project has increased to approximately $21.1 million, more than double its original estimated cost.

The Town Board on Tuesday held a public hearing to increase authorized spending on the project by about $2.48 million over the amount last approved.

The original estimated maximum cost of the project was $10.5 million, according to a 2021 report prepared by Riverhead Sewer District consulting engineers H2M. The estimated maximum cost later rose to $18.65 million, according to a May 2024 revised report prepared by H2M.

Riverhead Sewer District Superintendent Tim Allen said the increase reflects changes made during the design and grant-funding process.

The project is intended to reduce the volume of biosolids produced at the sewer treatment plant, lowering disposal costs and improving long-term operational efficiency for the district.

The hearing was closed Tuesday, with a bond resolution expected to be voted on at a future meeting.

The board on Tuesday also approved several measures related to PFAS treatment infrastructure in the Riverhead Water District, including a $2.26 million budget adjustment tied to treatment improvements at Water District Well No. 5-2A.

The project is being funded through a federal Bipartisan Infrastructure Law Emerging Contaminants grant, according to town documents..

Bids connected to installation of water mains at 203 East Main St. and PFAS treatment improvements at Well No. 5-2A were also approved Tuesday..

The board also scheduled a public hearing on the amended site plan application for Scott’s Pointe, also known as Island Water Park, in Calverton.

Source: RiverheadLOCAL