Barnum Island Creek Bridge Replacement

LKB was retained by Nassau County Department of Public works to provide construction management and construction inspection services for this federally-funded project, for the replacement of the existing Barnum Island Bridge that spans over Barnum Island Creek in Island Park, NY.

The bridge carries Long Beach Road northbound and southbound over Barnum Island creek. The northbound portion of the existing bridge consisted of precast concrete box beams supported on pile supported abutments, with a center concrete pier supported on piles. The southbound span consisted of steel I-beams encased in concrete, supported on pile supported abutments with a pile bent center pier.

The existing superstructure of both spans was completely removed and the existing substructures were partially removed in order to utilize the existing abutments as retaining walls. The new structure for both spans consists of integral abutments placed behind the existing abutments that support a precast concrete box beam superstructure. Utility bays were included within the superstructure in order to maintain the existing 12 inch diameter water main, 10 inch diameter gas main, and a 24 inch diameter sewer force main that cross over the bridge, along with relocating 12 telephone ducts and a traffic control conduit on the bridge. Work Zone Traffic Control was a critical aspect of this project as Long Beach Road is a heavily traveled roadway. Both vehicular and pedestrian traffic had to be maintained at all times. In order to achieve this, lane closures along with staged construction were utilized.

LKB’s services included detailed inspection, on-site field testing of materials and other construction activities, including field measurement and collection of data, submission of monthly and final estimates and progress reports, and preparation of record plans showing all changes from the contract plans. The construction management/inspection services included overseeing all construction operations and the placement of Work Zone Traffic Control. The construction was subject to NYSDOT’s MURK and CEES reporting and record-keeping requirements, as well as Federal Aid Policy Guidelines 635 and 637.

This project received the 2020 Project of the Year Award – Bridges from the American Society of Civil Engineers (ASCE) – Long Island Branch.