Project Final Report-07121-1401-This project will design a composite riser system which allows ultra-deepwater and high-pressure well capability using currently available industry standard tensioning capabilities, and construct full-diameter, sub-length specimens for comprehensive lab testing. The system must satisfy regulatory concerns, meet industry performance standards, and provide sufficient margins of safety to eliminate apprehension at the operator level. The result of this project will be a design solution that is ready for trial/use in the field with proven top-side tension leg platform (TLP) and seagoing platform for acoustic research (SPAR) applications under similar load conditions at water depths far exceeding current capabilities.