Bridges and Culverts

Catworks has installed bridges and culverts of various spans and sizes, from over 60 inch diameter culverts to large span, precast deck and girder bridges. These installations comprised numerous and varied conditions and assemblages, including (but not limited to): various abutment designs; stream diversion and restoration; riprap energy dissipaters; aluminized inlets, spillways and splash aprons; and gabion, riprap and cast-in-place headwalls. In addition to traditional culvert work, the nature of our core service areas provides CWC extensive experience installing unique and single design flow management structures.


Catworks has performed numerous bridge installation projects, most of them comprising spans longer than 80 feet in length. Our vast experience with bridge construction spans multiple bridge types, including the repair and restoration of the Multnomah Falls Bridge for the US Forest Service; installation of a composite concrete and steel bridges for the US Army Corps of Engineers; and several simple span bridges of varying size and configuration on roads throughout the west coast.


CWC has performed construction and installation of a wide variety of culvert structures, including multiple concrete box culverts and open bottom arch multi-plates, many of which required live stream diversions in order to accomplish the work. Notably, CWC constructed an aluminized 171 inch by 110 foot long arch culvert with interior baffle plates and sloped in-and-outlets.

In-Water Work

CWC has performed extensive work within regulated fish windows, and in compliance with strict in-water work requirements. Many of CWC’s bridge and culvert installations require live stream diversion and subsequent restoration. CWC has extensive experience in performing diversions through temporary bypass channels (or other means), placement of required stream bed fill material prior to removing temporary bypass culverts, and restoring flow through the new culvert or stream bed. CWC has successfully diverted a continuous flow of over 1000 GPM in order to repair an outflow tunnel.

Other Services

Side of Catworks

Civil Construction

CWC is a general contractor that began in heavy civil construction and excavation. We own and maintain a fleet of equipment, trucks… Read more.

Catworks Columbia Slough Remediation

Environmental Remediation

CWC has the required resources, expertise and experience to be responsive and to properly implement remedial activities. Excavation… Read more.

Join Our Team

We are actively seeking humble, dedicated, and committed people to join our diverse group. If you feel you meet this criteria, send us your resume or come by our office to fill out an application.