SUMMARY OVERVIEW

The New Haven Harbor Improvement Dredging contract will include deepening the main channel, maneuvering area, and turning basin from -35 to -40 feet, MLLW, widening the existing channel by 100 feet (from 500 feet to 600 feet in the entrance outside the breakwaters and from 400 feet to 500 feet inside the harbor), lengthening the turning basin, and widening the channel bend near the East Breakwater from 560 feet to 800 feet.  These improvements will require dredging about 4.47 million cubic yards (cy) of ordinary improvement material and removing up to 63,000 cy of rock for a total of 4.47 million cy (Volume includes +2 feet of allowable overdepth in areas of regular material and +4 feet of allowable overdepth in areas of rock). Total dredge volumes presented above are subject to change after the fall/winter 2025 - 2026 maintenance dredging work is completed. The material proposed to be dredged from the harbor is composed of mainly sandy silts and clays with some fine sand in the entrance channel south of the breakwaters.  The material has been determined to be suitable for unconfined open water placement at Central Long Island Sound Disposal Site and for beneficial use in a limited capacity at four local sites.  The Quinnipiac, Mill, and West Rivers are not part of the improvement effort.

Note:  Important information such as geophysical surveys and boring data test results used to develop the design draft plans and specs can be found below.  Information presented at the Industry Day will be compiled here and added to references for further consideration.