Horizon Offshore has been awarded a letter of intent by Spinnaker Exploration for the lay and bury of 14 miles of 24-inch pipeline in the High Island area. The Lone Star Horizon will be used to lay the pipeline and the Canyon Horizon will be used to bury the pipeline. The operation will require deep burial conditions in a ship fairway. Horizon Offshore provides marine construction services such as installation of marine pipelines to transport oil and gas, subsea production systems and installation and abandonment of production platforms.