Longitude 123, Inc. (L123) is a California-based marine project consulting and construction management firm that employs over 100 years of hands on experience to plan, permit and perform energy-related projects in coastal environments and inland waterways with special emphasis on underwater construction and marine decommissioning.

Our experience and understanding of the processes required to successfully plan, permit and perform marine and underwater projects in tough regulatory environments has time and again proven to minimize our client’s risk exposure and reduce project costs.