WOC was the prime consultant for the project, responsible for the overall planning, engineering and design of the force main. The project successfully demonstrated the feasibility of a large dual pipeline installation using horizontal directional drilling and micro-tunneling in difficult soil conditions with no adverse environmental effects and minimal socio-economic impacts
Horizontal directional drilling was used to install two parallel 34-inch high density polyethylene (HDPE) pipes within 46-inch steel casings for the replacement force main’s 3,100-foot crossing beneath Honolulu Harbor. This was the longest and largest pipeline ever installed by horizontal directional drilling methods.
Disciplines Provided: Civil Engineering and Planning
2003 National Project of the Year, Environment More than $10 million, American Public Works Association
2002 Engineering Excellence Grand Conceptor Award, Consulting Engineers Council of Hawaii
2002 National Engineering Excellence Honor Award, American Council of Engineering Companies
2002 Outstanding Civil Engineering Achievement Award of Merit, American Society of Civil Engineers, Hawaii Section
2002 Project of the Year, Environment More than $10 million, American Public Works Association, Hawaii Chapter