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NWPX Infrastructure Successfully Completes First Installation of Revolutionary Radial Bending Joint Technology

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NWPX Infrastructure (Nasdaq:NWPX) completed the first field installation of its patent-pending Permalok Radial Bending Joint, enabling intentionally curved steel microtunnel construction. The joint preserves weld-free, press-fit installation and compatibility with existing equipment.

The inaugural project installed about 1,290 feet of 72-inch steel casing on a 5,500-foot-radius curve beneath New Jersey's Pleasure Bay for an emergency wastewater conveyance project, reinforcing NWPX Infrastructure's innovation focus in trenchless infrastructure.

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Positive

  • First field installation of patent-pending Permalok Radial Bending Joint technology
  • Enables curved steel microtunneling while maintaining structural integrity and efficiency
  • Weld-free press-fit connection reduces field labor and uses existing microtunneling equipment
  • Approximately 1,290 feet of 72-inch casing installed on 5,500-foot-radius curve
  • Successful emergency wastewater project strengthens position in trenchless infrastructure innovation

Negative

  • None.

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Patent-pending innovation establishes the world's first intentionally curved steel microtunnel installation and expands possibilities in trenchless infrastructure construction

VANCOUVER, Wash., June 10, 2026 /PRNewswire/ -- NWPX Infrastructure, Inc. (Nasdaq: NWPX), a leading manufacturer of water-related infrastructure products, today announced the successful completion of the first field installation of its patent-pending Permalok® Radial Bending Joint, a breakthrough technology that enables steel casing pipe to be installed along intentionally curved alignments during microtunneling operations.

The first installation of the Permalok® Radial Bending Joint featured 72-inch OD casing pipe manufactured by Northwest Pipe Company, providing the flexibility needed to achieve a 5,500-foot-radius curved alignment.

Developed internally by the Company, the Radial Bending Joint retains the advantages of Permalok's® proven press-fit connection system, including weld-free installation, reduced field labor requirements, and compatibility with existing microtunneling boring machines and jacking systems.

Steel casing pipe used in microtunneling applications to this point has been limited to straight-line installations, requiring engineers to design projects around existing underground obstacles, utilities, waterways, and infrastructure. The Permalok® Radial Bending Joint technology allows steel casing pipe to follow controlled horizontal, vertical, diagonal, and compound curves while maintaining the structural integrity and installation efficiency of traditional steel microtunneling.

"This is one of the most significant advancements in steel microtunneling in decades," said Scott Montross, President and Chief Executive Officer of NWPX Infrastructure, Inc. "The successful installation of the Radial Bending Joint demonstrates that curved steel microtunneling is no longer a concept, but a proven reality. We now have field-proven technology that can fundamentally expand the possibilities for infrastructure projects that were previously too complex, too disruptive, or too costly to construct."

The installation, completed beneath New Jersey's Pleasure Bay as part of an emergency wastewater infrastructure project for the Two Rivers Water Reclamation Authority, consisted of approximately 1,290 linear feet of 72-inch steel casing pipe installed along a 5,500-foot-radius curved alignment, providing a critical solution for completing an emergency wastewater conveyance project after construction challenges interrupted a previously planned tunnel. The project was designed by Hazen and Sawyer and was installed by Northeast Remsco Construction.

The successful installation represents a significant milestone for NWPX Infrastructure and its continued focus on innovation and reinforces the Company's leadership position in trenchless infrastructure.

About NWPX Infrastructure – Founded in 1966, NWPX Infrastructure, Inc. is a leading manufacturer of water-related infrastructure products. Under the Northwest Pipe Company brand, the Company is the largest manufacturer of engineered water transmission systems in North America and produces steel casing pipe, bar-wrapped concrete cylinder pipe, and pipeline system joints and fittings. The Company also provides solution-based products for a wide range of markets including high-quality reinforced precast concrete products, lined precast sanitary sewer system structures, water distribution and management equipment including pump lift stations, wastewater pretreatment, and stormwater quality products. The Company has broadened its manufacturing footprint by bringing lined and engineered precast products into production at additional facilities. This increases the Company's capacity and improves regional availability. Strategically positioned to meet growing water and wastewater infrastructure needs, the Company's skilled team is committed to quality and innovation while upholding its core values of accountability, commitment, and teamwork. Headquartered in Vancouver, Washington, the Company operates 14 manufacturing facilities across North America. For more information, please visit www.nwpx.com.

Contact:
Aaron Wilkins
Chief Financial Officer
NWPX Infrastructure, Inc.
360-397-6294 • awilkins@nwpx.com

The Permalok® Radial Bending Joint casing pipe enabled construction crews to navigate a tight footprint in a densely populated neighborhood and successfully intercepted an abandoned tunnel beneath Pleasure Bay from the original tunnel exit shaft.

Cision View original content to download multimedia:https://www.prnewswire.com/news-releases/nwpx-infrastructure-successfully-completes-first-installation-of-revolutionary-radial-bending-joint-technology-302796217.html

SOURCE NWPX Infrastructure, Inc.

FAQ

What did NWPX (Nasdaq:NWPX) announce about its Permalok Radial Bending Joint on June 10, 2026?

NWPX announced the first successful field installation of its patent-pending Permalok Radial Bending Joint technology. According to NWPX, this establishes the world’s first intentionally curved steel microtunnel installation and demonstrates field-proven capability for curved steel casing in microtunneling projects.

How does NWPX's Permalok Radial Bending Joint technology change microtunneling applications for NWPX investors?

The Permalok Radial Bending Joint lets steel casing follow controlled curved alignments in microtunneling projects. According to NWPX, it maintains structural integrity, keeps weld-free, press-fit installation, reduces field labor, and works with existing boring machines and jacking systems, expanding feasible project designs.

What were the key specifications of NWPX's first Radial Bending Joint installation (NWPX stock)?

The first installation used about 1,290 linear feet of 72-inch steel casing pipe. According to NWPX, the pipe followed a 5,500-foot-radius curved alignment beneath New Jersey’s Pleasure Bay, serving an emergency wastewater conveyance project for the Two Rivers Water Reclamation Authority.

Why is NWPX's curved steel microtunnel under Pleasure Bay important for wastewater infrastructure?

The curved microtunnel provided a critical solution after construction challenges halted a previous tunnel plan. According to NWPX, the project enabled emergency wastewater conveyance beneath New Jersey’s Pleasure Bay, showing how curved steel microtunneling can address complex, disruptive, or previously impractical infrastructure routes.

What does the new Permalok Radial Bending Joint mean for NWPX Infrastructure's trenchless infrastructure position?

The successful installation is described as a significant milestone in steel microtunneling innovation for NWPX. According to NWPX, the field-proven technology reinforces its leadership in trenchless infrastructure and broadens possibilities for complex water-related infrastructure projects requiring curved alignments.

How does NWPX's radial bending joint benefit future microtunneling project design and construction?

The joint lets engineers design microtunnels with horizontal, vertical, diagonal, and compound curves around subsurface obstacles. According to NWPX, this can reduce disruption, increase routing options, and keep the efficiency of traditional steel microtunneling using compatible existing equipment and press-fit connections.