Foth was contracted by Moffatt and Nichol, Long Beach, CA, to collect hydrographic data surrounding each of the four THUMS Oil Islands located in San Pedro Bay, CA (Chaffee, Freeman, Grissom and White Islands). Moffatt and Nichol was interested in documenting the condition of rip-rap slopes before potential impacts from El Nino-fueled storms. The Foth field team collected high resolution multibeam echo sounder survey data along the perimeter of each of the Oil Islands, and high resolution sidescan sonar imagery of the islands rip rap slopes and surrounding bay floor.