The marine environment can be harsh and sometimes features dynamic wave loads, poor soils, intense sedimentation, corrosion, sensitive ecosystems, extremely variable tides, heavy seas, ice, earthquakes, and shoreline movement. These conditions are challenging to those who invest in infrastructures in such environments. The need to protect facilities from moderate-height waves has led PND to develop the partially penetrating wave barrier.
In 1980, the first PND-designed wave barrier was successfully constructed at a United States Coast Guard facility in Oregon. After a severe storm in 1986 hit the wave barrier, it easily withstood 6-foot waves.
Advantages of the partially penetrating wave barrier:
- Reduces construction and minimizes costs
- Reduces construction time
- Minimal space required
- Allows natural basin flushing
- Minimizes impact on the marine environment
- Minimizes loading on submarine soils
- Reduces the breakwater’s susceptibility to seismic damage
- Does not require rock quarrying and related activities
- Uses methods and materials of construction similar to docks
- May be attached directly to existing docks
- May be used as a part of foundation system for future docks
- Can be removed readily for modification or expansion
- Allows construction in deep water
- Can provide mooring directly to the breakwater
- Can be constructed with a variety of materials and construction methods
PND Recognized Nationally for Two Alaska Bridge Designs
PND Engineers, Inc. received recognition from the National Steel Bridge Alliance (NSBA), a division of the American Institute of Steel Construction (AISC), for two separate bridge projects in the 2018 Prize Bridge Awards competition: a National Award for the Colville River Nigliq Bridge in Nuiqsut, Alaska, and a Merit Award for the Moose Run Golf Course Bridge in Anchorage, Alaska.
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.