OPEN CELL Levee TechnologySince the 1980s, when PND Engineers, Inc. (PND) first developed its OPEN CELL SHEET PILE™ (OCSP) technology, the company has worked on developing new ways to apply the system to find the best solution to address our clients' needs. PND has developed methods for designing OCSP levees and man-made reefs. PND has designed OCSP structures that have incorporated fish passages in Skagway, Alaska, and in-take structures in Victoria Island, California.

Artificial Levee:
A cost-effective flood-control solution with low-impact technology, the OCSP levee is an innovative technology for rehabilitating aging, structurally deficient levees. The OCSP levee reduces the levee footprint by using vertical, recycled steel sheet piles to create an economical tension structure that remains stable under extreme flood pressures, earthquake forces, and river scour. Contrasted with typical setback levee repairs, the OCSP levee does not require encroachment onto adjacent property or enormous quantities of imported soil fill and rock to improve safety and increase flood capacity.

Tsunami Safe Haven Islands:
After the Banda Aceh, Indonesia, earthquake and tsunami in 2004, PND developed a tsunami safe haven concept using our patented OCSP technology. The tech is an adaptation from traditional steel sheet pile cellular structures. Analysis and project applications have demonstrated that the system is effective at resisting extreme loading and seismic conditions. The system is often more cost effective than other traditional retaining and armoring structures.

Man-Made Reefs:
The OCSP reef restores marine habitat and waterfront access while helping repair aging urban infrastructure. It provides an innovative solution for the waterfront and urbanized shorelines.

Contact us for more information about alternative applications for OCSP technology.


  • PND Featured in Waterways Journal

    "We're getting the message out that the technology is not only for reclaimed shoreline but also allows you to come in and do a restoration of shoreline," PND Senior Engineer Carl McNabb tells the publication.

  • PND: 40 Years Young

    It began as many Alaska stories do: on a fishing boat at sea. That's where it all started for PND Engineers, Inc. It's a story steeped in colorful history from a number of first-impression engineering designs in Alaska to groundbreaking R&D that transcends Alaska and has influenced our international industry. For 40 years, PND has taken pride in providing innovative solutions at low costs, often in challenging conditions. This is our story.

  • Elizabeth Peratrovich First Tlingit Enshrined in Hall

    On November 2, 2019, Elizabeth Peratrovich was inducted into the National Native American Hall of Fame at a ceremony at the Hard Rock Hotel and Casino in Tulsa, Oklahoma. Elizabeth, the mother of PND Engineers, Inc. co-founder Roy Peratrovich, Jr., was one of 12 inductees in the fledgling Hall of Fame's second class.

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