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About us

Northwest Infrastructure

Northwest Infrastructure has been providing mass excavation, underground utilities,demolition, site development, and trucking services to the Pacific Northwest since 1997.

Through strong leadership and an experienced, skillful workforce, Northwest Infrastructure has become the premier heavy civil construction contractor in Oregon and Southwest Washington.

Our passion for customer satisfaction, efficiency, and workplace safety has earned us a reputation as a true service provider to clients throughout the Portland Metropolitan area.

NWI’s Success Is Not Measured by Income, but by the Satisfaction of Our Team and Clients. Our Company’s Foundation Is Built on Integrity, Respect, and the Drive to Exceed Expectations.

We have been working with NWI for well over a decade and find their professionalism and work ethic extraordinary. Some of the larger projects that we have worked on with NWI include but are not limited to: Pomeroy Place Veteran’s Apartments, Quentin Terrace, Cully Park, Portland Street Car Maintenance Facility, Portland Community College Southeast Campus and the Grand Avenue Apartments. All of these projects featured various challenges and NWI was not only able to deliver but exceed expectations.

MAURICE RHAMING President, General Manager, and Design Build of O’Neill Construction Group


We Specialize In

Excavation - Grand Ave-min


No load is too big; our skilled team and fleet of heavy equipment can handle even the largest jobs. We have excavated sizable projects and jobsites all over the Northwest.

Click here to see some of NWI’s Excavation Projects.



From apartment units to campus buildings, what goes up, must come down. With a focus on safety and efficiency, NWI has perfected demolition and deconstruction of industrial, commercial, and residential structures.

Click here to see some of NWI’s Demolition Projects.

Utilities - oliver 3-min

Underground utilities

When it comes to underground utilities, NWI can deliver. From sewer tie-ins to large water retention ponds NWI guarantees quality results.

Click here to know about our Underground Utility Services.


Photos and Details of Past and Current projects

Oliver Station

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Grand Ave

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Kellogg Middle School

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Nike Project

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