Y--Award Annoucment for Repairs to Bearskin Neck Stone Jetty, Rockport, MA

The work of this project consists of repairing the 540-foot-long jetty that was damaged during Hurricane Sandy. The Bearskin Neck Jetty is located at the northern most end of Bearskin Neck Road in Rockport, Massachusetts, approximately 35 miles north of Boston, Massachusetts and 20 miles south of the New Hampshire-Massachusetts border. The jetty extends into the ocean from the end of Bearskin Neck Road to the east and provides protection to Rockport Harbor. The existing jetty consists primarily of 3-5 ton armor stone. The ocean side of the jetty has retained it shape/authorized dimension while 400 feet of the jetty contains voids 5 feet deep along the crest profile and voids 5-10 feet deep along the harbor side slope. The head at the east end of the jetty is missing along with the US Coast Guard Aid to Navigation that was mounted there. Specific work tasks are intended to reconstruct severely deteriorated areas of the 540-foot long jetty. These tasks include: Delivery and installation of approximately 4,000 tons of 14-19 ton armor stone and 6000 tons of 4-8 ton armor stone to repair the jetty to authorized dimensions. The completed repairs will provide a crest width of 18 feet for the first 400 feet, widening for the next 70 feet to a fixed width of 28 feet for the last 30 feet, at the head of the breakwater. Crest elevation is +18.8 feet Mean Lower Low Water (MLLW) and side slopes are 1 vertical: 2.5 horizontal for the entire length of the jetty. The work includes replacing displaced armor stone to fill in existing gaps in the jetty. A majority of the 18-19 ton stone will be used to reconstruct the last 30 feet, which is the head of the jetty. Repairs will require substantial moving and re-handling of existing stones to obtain the required interlocking placement. Mean High Water (MHW) in Rockport is 9 feet and approximately 6 days per month during the construction window seas can be expected to be in excess of 4 feet. It is expected that a crane and barge, anchored on the harbor side of the jetty, will be required to handle the 18 ton stone. Some of the rework/handling of the smaller 3-5 ton stone can be performed by equipment on the jetty. That equipment can access the jetty via a temporary ramp from the culdesac at the landside end of the jetty, or by placing the equipment on the jetty with the crane.