Repairs to Relieving Platform No. 1 – North Kingstown RI

Repairs to Relieving Platform 1Client: SENESCO MARINE
10 MacNaught Street
Quonset Point North Kingstown, RI
Completion Date: 2005
Total Project Value: $500,000

Relevant Project Features:

  • Geotechnical Investigation
  • Obtained Rhode Island State Building Permit for Construction on State (Leaser) Property
  • Obtained CRMC Maintenance Assent
  • Prepared Plans and Specifications for Bidding and Construction
  • Provided Bidding Assistance
  • Provided Construction Observation

Repairs to Relieving Platform 3

RT Group, Inc. (RTG) was retained by Southern New England Ship Building Company (SENESCO MARINE) to design the repairs to Relieving Platform No. 1 and allow the continued and safe launch of double-hulled fuel barges, which are constructed at their Quonset Point Facility. The barges range from about 80,000 to 100,000 barrel capacity and weigh from about 3,000 to 4,000 tons. The barges are constructed on land and are moved to Relieving Platform No. 1 on steel dollies supported by railroad tracks.

From the relieving platform, the barges are launched to a floating dry dock positioned immediately in front of the platform.

Repairs to Relieving Platform 2Repairs to Relieving Platform No. 1 (circa 1944) were required due to damages sustained during previous launch/construction operations and because the larger barges currently under contract required a wider footprint for launching. The innovative repair that was developed included demolishing a portion of and spanning over the existing platform using H-pile supported W36 x 230 girders. In addition, the load transferred to the existing platform was relieved by extending the repairs landward of the existing platform and constructing a pile supported bridge section and approach slab.

As part of this project, RTG completed soil borings and test pit excavations at the existing platform location; prepared and submitted all permit applications (State of Rhode Island Building Permit, CRMC and QDC review); prepared plans and specifications for construction; completed WEAP analyses and supervised dynamic pile driving analyses to verify H-pile capacity; and provided construction observation services.