At Bosk Bridge Design, we recognize that a fish passage is more than an engineering solution. It is a lifeline for aquatic ecosystems, ensuring that native fish species can migrate, spawn, and thrive. Our fish passage services in Washington, Oregon, and Idaho are rooted in sustainable engineering practices that balance infrastructure needs with environmental responsibility.
A well-designed fish passage allows aquatic life to move freely past barriers such as dams, culverts, and bridge structures. Our team integrates hydraulic modeling, habitat assessment, and species-specific requirements into every project. Whether it involves a fish ladder for salmon returning to their spawning grounds or a low-gradient bypass channel for other native species, we create solutions that prioritize ecological health while meeting regulatory standards.
The rivers and streams of Washington, Oregon, and Idaho present unique challenges, from seasonal flooding to steep elevation changes. Our engineers consider these factors when designing a fish passage, ensuring resilience and adaptability. For example, a fish ladder may be combined with natural rock weirs to create resting pools, or a fish lift can be implemented where space or height constraints limit traditional options. Every design is customized to work with the local environment rather than against it.
Our field teams use high-resolution mapping, hydraulic simulations, and biological surveys to guide every step of the fish passage design process. These tools allow us to predict flow patterns, assess fish behavior, and optimize structures for long-term functionality. By combining precise engineering with ecological insight, we help clients build infrastructure that supports both human and natural communities.
We work closely with environmental agencies, tribal organizations, and local communities to ensure each fish passage meets or exceeds state and federal standards. Our projects often incorporate sustainable materials, erosion-control measures, and habitat restoration elements that improve water quality and biodiversity. From the placement of a fish ladder to the installation of a fish lift, our designs aim to enhance the surrounding ecosystem as much as the passage itself.
Eco-focused engineering
Proven experience
Custom Designs
Collaborative Approach
with measurable environmental benefits
in Pacific Northwest waterways and fish habitats
tailored to specific site conditions and species
with agencies, stakeholders, and local communities
By choosing Bosk Engineering, you partner with a team that understands the critical role of a fish passage in sustaining healthy waterways. Together, we can create infrastructure that serves people and protects the natural cycles of aquatic life.
Our culvert designs prioritize water flow management and environmental sustainability, preventing erosion and protecting aquatic.
We create fish ladders and passages that support aquatic life, allowing safe and effective movement of fish through otherwise impassable.
Whether you need a simple timber bridge or a complex structure, our bridge designs blend seamlessly with the natural landscape.
We design and engineer roads and driveways that ensure safe and reliable access while minimizing environmental impact.
Our culvert designs prioritize water flow management and environmental sustainability, preventing erosion and protecting aquatic.
We create fish ladders and passages that support aquatic life, allowing safe and effective movement of fish through otherwise impassable.
Our Partners
We’re here to help you with all your forestry and geotechnical engineering needs. Whether you're planning a new road, bridge design, or environmental structure, our team of experts is ready to assist you from the initial concept to the final build.
PO BOX 816
Enumclaw, WA 98022
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WA UBI: 605-598-272
OR Registration: 228538294
EIN: 85-0616388
Physical Address: 2820 Griffen
Ave Enumclaw, WA 98022
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