Underwater Facilities Inspection and Assessment at Deperming Pier Trident Refit Facility, Bangor, Washington.
Abstract
All timber braces in the intertidal and submerged zones of the Magnetic Silencing Facility Deperming Pier at the Trident Refit Facility, Naval Submarine Base Bangor, Washington were subjected to Level I and II examination to determine the overall condition of the members and to identify specific defective members which might require maintenance and repair. The overall condition of the members ranged from very good to fair. The intertidal diagonal braces and horizontal wales were found to be in very good condition with only 4% of the members found attacked or damaged. The submerged zone timbers such as the 'X' and 'Z' loop trays and tray support timbers were in fair to good condition, with several members having sustained significant marine borer attack or damage. The number of defective timbers found is approximately 283. It is recommended that these timbers be subjected to preventive or restorative maintenance and repair. It is estimated that repairs to defective timbers will cost between $230,000 and $290,000 depending on repair methods used. These fees are based on replacing damaged members with either high retention (20 lbs/cu ft) creosote treated predrilled timbers or with molded fiberglass members. The choice of material and repair/replacement techniques will affect the final fee. Keywords: Underwater inspection; Washington(State).
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1985
- Accession Number
- ADA168673