Installation and Extraction of Seasonal Docks and Extension Piles

An autumn 2019 extraction and spring 2020 install of three (3) temporary steel extension piles for the seasonal dock at NHFG’s Wellington State Park boat ramp in Bristol, NH that accesses Newfound Lake. In addition, the NHFG seeks assistance retrieving and deploying the seasonal floating dock and gangway system associated with the extension piles. The assistance can be provided without resetting the crane position or configuration. The dock consists of two (2) eight (8) foot wide by twenty (20) foot long by two and onehalf (2.5+/-) foot deep floating dock segments. When in service the two segments are bolted to each other and are accessed from shore by a thirty (30) foot long by four (4) foot wide aluminum gangway. The dock segments weigh approximately 4,000 pounds each. Each dock segment has pile slots enclosed by a piece of decking that can be removed to receive piles. The outer pile is secured to the outer-lake-end of the dock segment via a removable metal chain that attaches to the end of the dock segment and surrounds the pile. Each seasonal extension pile is steel pipe with an 8.625-inch OD and 0.375-inch thick walls; about 16 feet long and weighs about 600 pounds. They are fitted into permanent 10-inch ID steel pipes (“sleeve piles”) located below water. The top of each extension pile has a centrally located pick point ring. The nominal dimensions of the insideopening of the ring are 2-inch wide by 5-inch tall; and the diameter of the steel-ring-bar is 1.5-inch. Location: Wellington State Park is 614 W. Shore Road, Bristol, NH. The entrance to the park is located about 2.9 miles from the intersection of West Shore Road and Route 3A.

Division 35 -

Waterway and Marine Construction, Common Work Results for Waterway and Marine Construction, Waterway and Marine Construction and Equipment, Marine Construction and Equipment.