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 environmental conditions are challenging for infrastructure. The need to protect facilities from moderate-height waves led PND to develop the partially penetrating wave barrier.

In 1980, the first PND-designed wave barrier was successfully constructed at a U.S. 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 ENGINEERS, INC. Celebrates 40 Years in Business

    Consistently and currently ranked in Engineering News-Record’s annual list of the country’s top 500 design firms, PND Engineers, Inc. prides itself on producing innovative engineering solutions at low costs and oftentimes in the most challenging conditions. That ethos has driven our company’s purpose for 40 years. We were founded in 1979 in Anchorage by the first Alaska Native licensed engineer in the state (Roy Peratrovich, Jr.) and a future Nova Award winner (Dennis Nottingham) and were incorporated with the help of a former University of Notre Dame running back who won an NCAA national championship in 1953 (Paul Reynolds). A few years after Brent Drage became a principal stockholder in 1981, Alaska Construction & Oil gave an emergent PND initialisms “Permanent. No-Nonsense. Dependable.” and “Persistent. Nervy. Determined.” To all of our clients, we couldn’t have earned this longstanding reputation without you. You’ve helped make this company what it is today.

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