Inter- and Sub-tidal Surveys

Platform Edith to Elly Power Cable, San Pedro Channel, California

Project Name: Platform Edith to Elly Power Cable, San Pedro Channel, California
Services: Seafloor Habitat and Biological Characterization
Client: Beta Offshore LLC

To eliminate emissions from a diesel generator that provided electrical power to two oil platforms, Edith and Elly, Beta Offshore contracted Padre to complete an underwater video survey of a seafloor corridor within which an electrical power cable was to be laid. Padre marine scientists recorded onboard observations from a remotely operated vehicle (ROV) real-time video and from still photographs of the seafloor habitats and biota within the mile-long corridor between the two platforms. A technical report that discussed the results of the survey was prepared and was used to orient the cable route to minimize potential impacts to the resources.

Padre was also involved in similar surveys, permitting, and construction monitoring for the replacement of two submarine pipelines to allow platform Eureka to return to full production.

California Resources Petroleum Corporation Grubb Lease Decommissioning Project, Ventura County, California

Project Name: California Resources Petroleum Corporation Grubb Lease Decommissioning Project, Ventura County, California
Services: Marine Biological Resources Dive Surveys
Client: California Resources Petroleum Corporation

Padre completed marine biological resources dive surveys on behalf of California Resources Petroleum Corporation (CRC) in support of the proposed decommissioning of its idle intake and outfall structures located in State waters under the jurisdiction of the California State Lands Commission. The surveys documented the type and location of marine plants, macro-epifauna, and fish associated with the habitats along the offshore pipeline corridors. The resulting data will be used in the final project planning effort, and as a baseline for comparison with post-project marine biological conditions. Additionally, the surveys focused on determining if any sensitive species (i.e., abalone, kelp, or seagrass beds) and resources (i.e., Essential Fish Habitat) were present in order to properly analyze impacts of the proposed decommissioning project under the California Environmental Quality Act.

All Padre divers are certified through the Professional Association of Dive Instructors and National Association of Underwater Instructors. Padre American Academy of Underwater Sciences certified divers oversaw data collection for each scientific dive. Project-specific Dive Plans and a Health and Safety Plan were prepared and approved by CRC prior to dive surveys. Divers used various tools to collect data and underwater Go Pro© cameras to record underwater video and photographs. Divers for this project were also equipped with underwater lights and slates for data collection.

Ocean Bottom Seismometer Installation, Offshore San Luis Obispo, California

Project Name: Ocean Bottom Seismometer Installation, Offshore San Luis Obispo, California
Services: Seafloor Habitat Survey
Client: Pacific Gas & Electric Company

As part of a larger, multidisciplinary study of the offshore earthquake faults along central California, and in addition to environmental documentation and permitting services, PG&E retained Padre to conduct a remotely operated vehicle (ROV) and diver survey of the seafloor habitats in water depths up to 300 feet within a corridor where a series of ocean bottom seismometers (OBS) were to be placed. Diver-biologists contracted to Padre completed a series of dives and recorded underwater video from the shallow subtidal to the 60 feet isobath. In deeper water, an ROV was used to collect video footage and still photographs of the various habitats and associated biota. Padre marine scientists were onboard the ROV survey vessel and directed the survey along the proposed route. A technical report, that described the habitats and biota, was prepared and the final OBS corridor was aligned to avoid rocky habitat and areas that supported sensitive biota, including rockfish and long-lived attached epitbiota.