PND Earns Project of the Year Award
PND’s Juneau Cruise Ship Berths project was named Project of the Year at the Anchorage Engineers Week Banquet on February 24, 2018.
For this project, the City and Borough of Juneau (CBJ) Docks and Harbors Department contracted with PND to design two new cruise ship berths to accommodate post Panamax cruise ships. The first phase of the Port of Juneau Cruise Ship Berths project was successfully completed in May 2016. PND provided planning, public involvement, surveying, geotechnical investigations, permitting, final design, bid phase support, contract administration and construction inspection services for this multi-phased waterfront project in Juneau.
Juneau is located in a steep mountainous region in Alaska’s inside passage. The remote and awe-inspiring scenery that attracts visitors from around the world also presents challenges for design and construction of marine transportation facilities. PND worked closely with the CBJ to develop creative and viable project alternatives to accommodate the unique site conditions of the downtown Juneau waterfront area. The selected concept consisted of two independent, floating concrete pontoons that accommodate passenger transfers from the vessels through the 25 foot tide cycle. The south pontoon measured 300 feet long by 50 foot wide and the north 400 feet by 50 foot wide. The combined length of both berths is 2,100 feet long and will support two vessels with overall lengths of 1,063 feet and a gross tonnage of 144,000 tons each simultaneously.
The design team overcame the challenges of the deep water, variable bedrock elevation, and loose/weak marine sediment overburden by using a combination of rock anchors, rock sockets, and SPIN FIN® pile tips. PND used rock anchors in piles with high tension loads and shallow overburden. At locations with deeper overburden, SPIN FIN® pile tips were utilized to resist high tension loads in overburden with low frictional resistance. The utilization of SPIN FIN® pile tips appropriate to the site conditions saved the CBJ several millions of dollars on the project cost.