Coastal and Inland Energy

Gas Transmission Pipeline Crossing Replacement

Location: San Joaquin River, California
 Project Description
L123 was contracted to engineer, design and obtain regulatory permits for the decommissioning phase of an existing submarine pipeline crossing the San Joaquin River outside of Patterson, California, and to obtain regulatory permits for the construction of its horizontal directionally drilled (HDD) 24-inch replacement pipeline. L123 and Padre Associates also provide regulatory compliance monitoring of the HDD replacement construction. This crossing replacement project was unique in that it crossed under two USACOE levees (required permissions from the USACOE 408 Group) and involved an unusually long (possibly a world record) HDD bore requiring drilling from both sides of the crossing and pull back of an approximately 7,100 foot long 24-inch pipe string. Prior to construction, this project languished in the California and federal regulatory permitting processes for over three years and was nearing the NTSB deadline for replacement of the crossing when L123/Padre took over the permitting effort and permitted the project in less than 10 months. As of the date of this posting, the HDD replacement has been completed and the decommissioning of the existing crossing will take place in the summer 2021.
 
Relevance
The successful completion of this project demonstrates the efficiencies of L123/Padre’s unique regulatory permitting acquisition processes in acquiring permits for projects involving California marine and terrestrial components as well as L123’s exceptional California decommissioning expertise.
 

Stanislaus River Crossing Pipeline Decommissioning

Location: Stanislaus County, California
Project Description
L123 was contracted on a turnkey, at-risk basis to engineer, design and perform the decommissioning of this retired energy pipeline crossing on the Stanislaus River in Stanislaus County, California. Decommissioning included performance of all surveys, production of plans and specifications, interfacing with the landowner, interfacing with and supporting our clients regulatory permitting effort, cleaning the crossing, slurry filling and removing an exposed segment. L123 performed all engineering and design, internal pipeline cleaning, terrestrial crews and heavy equipment, underwater crews and underwater support equipment, excavation above water and underwater, asbestos abatement and disposal, and recovered pipeline disposal.
 
 
Relevance
This project is another example of L123’s long experience inspecting, surveying, engineering/designing, constructing and decommissioning energy pipelines in the California Delta.

Dynegy/Morro Bay Power Plant Tanker Berth Decommissioning Project

Location: Morro Bay, California
Project Description
The former PG&E Morro Bay Power Plant was sold to Duke Energy in 2003 and the facility’s marine terminal was scheduled for decommissioning. The facility was later acquired by Dynegy. Longitude 123, Inc.  served as the sub-consultant lead to the marine construction contractor in acquiring the project and then managing the decommissioning team in investigating the marine facilities and producing the decommissioning planning in support of the environmental permitting process. L123 also served as the decommissioning manager with responsibility for all planning and shared oversight.
 
Relevance
This project demonstrates L123’s ability to plan and manage the rehabilitation of major offshore oilfield infrastructure in the sensitive California environment.

Gas Pipeline Crossing Survey Program

Location: Sacramento/San Joaquin Delta, California

Project Description
The owner required surveys of each of its buried submarine pipeline river crossings in the Delta that required extensive electronic location of the buried submarine pipelines and depth of burial measurements to obtain precise plan and profiles of each crossing from onshore landing to onshore landing. 

L123 worked with an underground utility tracking company to pair an underwater utility tracking antenna with a high wattage toner to locate these pipeline crossings and measure depth of burial at distances in excess of one mile from the toner signal point. This system not only identified the horizontal locations of the pipeline crossings but also provided depth of burial measurements up to 21 feet deep.

Gas Pipeline Crossing Decommissioning

Location: San Joaquin River, California

Project Description
Investigate, plan, permit and perform the decommissioning of three submarine pipeline crossings on the San Joaquin River. The scope of work included provision of all environmental permitting on a turnkey basis, all shore landing terminations, and all underwater terminations and removals.

Relevance
L123 is capable of planning, permitting and managing major projects on a turnkey basis.

El Paso / Coscol Marine Oil Terminal Deconstruction Project

Location: North San Francisco Bay, California
Project Description
The former Pacific Refinery located alongside San Pablo Bay in the city of Hercules, California was supported by a marine oil terminal (MOT) constructed in 1966 to support the loading and offloading of tankers. The MOT facility was comprised of several reinforced concrete wharf structures founded on concrete pile, wood piling dolphins, several submarine pipelines, and a shore landing. L123 client, a marine construction contractor, was awarded the contract to decommission this facility in accordance with strict environmental agency permit conditions and requirements. This project required the employment of four individual derrick barge-based marine personnel and equipment spreads to complete the work on time and within the environmental parameters. L123 developed the Contractor Work Plan and worked with the client to develop all operational and supporting plans.
 
Relevance
This project demonstrates L123’s experience with marine construction and decommissioning planning and operations in a difficult environmental permitting setting.

Submarine Pipeline Construction

Location: Long Beach, California

Project Description
THUMS was a consortium comprised of Texaco, Humble, Unocal and Mobil Oil to operate the four islands in Long Beach Harbor for the City of Long Beach and the State of California (now owned by California Resources Corporation). L123 owner, Mark Steffy, contracted to construct a new 12-inch submarine pipeline between Island White and Island Grissom. The 12-inch diameter, 1-mile-long pipeline was to be buried 12-feet below the harbor floor to minimize risks of anchor strikes. The pipeline right-of-way included two 90-degree turns. The project was successfully completed. Mark Steffy designed, built and operated the jetting sled that buried the pipeline in five days.

Relevance
This project demonstrates L123 ability to perform submarine pipeline construction to perform precise underwater excavation and pipeline burial.

Oil/Gas Decommissioning Project

Location: Long Beach, California
Project Description
This project involved the decommissioning of an oil and gas production island located offshore of Seal Beach and Belmont Shores, California. This concrete, wood and steel island was the oldest offshore production facility in the United States. A total of approximately 5,437 tons of concrete was removed, 1,455 tons of steel, 8,000 tons of rock, 2,775 tons of sand, 93 tons of painted concrete, 40 tons of grout and other materials.
 
Relevance
L123 developed the project’s feasibility study, project execution plan, contractor work plan, engineering and graphics that served as the basis for the project’s environmental permits. The decommissioning work included concrete saw cutting, diamond wire cutting, abrasive grit cutting, heavy lift rigging, and concrete disposal. Of the total volume of materials removed in this decommissioning, 96% was recycled and only 4% was disposed into landfill.

Power Station OTC Plugging Design and Planning

Location: El Segundo, California
Project Description
L123 has planned and managed all decommissioning technical aspects of this ongoing turnkey project, including technical studies, all site characterization surveys and inspections, engineering and design, and production of the PEP.
 
Relevance
This project demonstrates L123’s experience with marine construction and decommissioning planning and operations in a difficult environmental permitting setting.