This project was undertaken to provide detailed information on the environmental impacts associated with outer continental shelf (OCS) pipelines. The report is designed to be used by scientists or engineers involved in offshore petroleum pipeline planning, pipeline corridors, and pipeline landfalls. Major technical and environmental constraints discussed include physical, geological, and biological characteristics of suggested sites. Factors influencing site selection, such as coastal topography adjacent to offshore development areas, economics, existing onshore infrastructure, and state and local coastal policy are also presented. Emphasis is placed on the site, high-lighting site specific methods of installation and restoration.