Coastal Navigation Structures

Sea Engineering was contracted to perform inspections of 24 federal coastal navigation structures (CNS) throughout Hawaii, Guam, Rota, and American Samoa operated and maintained by the U.S. Army Corps of Engineers (USACE), Pacific Ocean Division (POD), and Honolulu District (POH). The purposes of the inspections were to verify the current condition of the structures, locate areas of concern on each structure, and identify and recommend future maintenance requirements. Specific work tasks included:

1. Categorizing each CNS into distinct reaches according to type of construction (rubble-mound, concrete armor, sheet pile, etc.); unique structural feature (head, trunk, root, etc.); and cross sectional features (crest elevation, side slopes, toe protection, etc.).
2. Conducting inspections by physically walking the length of each CNS and inspecting areas including the crest, slopes, and toe of the structure. Damage was located with accurate GPS, described and photographed.
3. Preparing draft and final post-inspection reports that summarize the findings documented during the site inspection.
4. Preparing a plan-view map including the aerial imagery of the project site, stationing, structure components, CEPD benchmark, and the GPS location of each finding recorded during the site inspection.