Langan performed a geotechnical investigation and provided services during construction for the Seaport Plaza. The 5.7-acre site is south of Redwood Creek. The general area was once part of the tidelands and subsequently a salt evaporation pond. The development consists of two 3-story office buildings, surrounding parking lots, an entrance court yard, and raising existing levees. The lower building level is partially below grade and used for parking. A key geotechnical issue was the presence of 16 to 25 feet of weak, compressible Bay Mud.