Submerged Pile Removal in a Dredge Borrow Area, Port of Long Beach West Basin Site

The United States Government executed a Lease in Furtherance of Conveyance to the City of Long Beach in 1998, allowing the City’s Harbor Department (Port) to transform the former Long Beach Naval Complex (LBNC) into a modern container terminal. A substantial portion of the program included demolition of significant waterfront structures built by the Navy for shipyard use in the West Basin of the Port of Long Beach. This paper will focus on a surprise that was discovered as the Port planned to use the West Basin as a dredge borrow site to complete in-water fills for its Middle Harbor Terminal Redevelopment Program. The West Basin site included numerous piers, the majority of which were demolished by the Port during the development of the Pier T Container Terminal. While performing pre-design surveys for upcoming dredging, divers noted pilings sticking above the seafloor. Upon review, it was determined that the pilings were in an area that was not occupied by a pier demolished by the Port. Historical photographs revealed that the pier was demolished by the Navy in the early 1980s. Subsequent field investigations revealed that either timber, steel, or concrete pile remnants remained in five former pier footprints within the proposed dredge footprint. This paper will discuss the techniques used to identify the types and estimate the quantities of remaining piles, the methodologies used to estimate the costs to perform the highly challenging task of removing piling with limiting permit restrictions that precluded the use of jetting or other methods that could generate excessive turbidity in the water column, and develop bid items for a work element that had the potential to be highly variable in a public bid process.

Language

  • English

Media Info

  • Media Type: Web
  • Pagination: pp 772-781
  • Monograph Title: Ports 2016: Port Planning and Development

Subject/Index Terms

Filing Info

  • Accession Number: 01605664
  • Record Type: Publication
  • ISBN: 9780784479919
  • Files: TRIS, ASCE
  • Created Date: Jun 7 2016 3:04PM