Public infrastructure
Municipal Engineering for Oregon and Washington Public Agencies
Stormwater, drainage, sewer, and pump station engineering for cities, counties, and special districts. Studies are built to support a funding decision, and designs are built to be bid.
Public agency work has two audiences. The first is the engineer reviewing the deliverable. The second is the council, commission, or board deciding whether to fund the next phase. We write for both: alternatives scored against criteria agreed at the start, planning-level costs with the contingency stated, and recommendations ordered the way a capital improvement program actually gets built.
Our principal engineer has delivered drainage studies, flood mitigation feasibility studies, stormwater pump stations, and capital project stormwater design for state and local agencies in Oregon and Washington, including WSDOT, ODOT, and the Cities of Bend, Beaverton, Lincoln City, Sammamish, Everett, and Fife. Much of that work was completed at previous firms. Cascadia Civil brings the same experience to smaller agencies and on-call contracts, with a single senior point of contact.
Smaller cities and special districts often need a senior engineer for a defined problem: a basin that floods every winter, a sewer reach that may not take the next development, a culvert that is both a flooding problem and a fish barrier. They need that without the overhead of a large consultant team. This practice is set up for that work.
What’s included
Studies, design, and delivery for public infrastructure.
Studies & planning
- Drainage studies and basin modeling (PCSWMM, XP-SWMM)
- Stormwater master planning
- Sanitary sewer capacity analysis
- Flood mitigation feasibility studies
- Alternatives analysis and weighted evaluation
- Planning-level cost estimating and CIP prioritization
- Grant support documentation
Design & delivery
- Capital improvement stormwater design
- Stormwater and water pump station design
- Culvert replacement and fish passage design
- Plans, specifications, and estimates (PS&E)
- Bid support and construction-phase services
- On-call engineering services
How it works
From first question to finished project.
Define the problem and the decision
We start by agreeing on what the study or design has to answer, who will use it, and how alternatives will be judged.
Data and field review
Existing models, GIS, as-builts, maintenance records, and a site visit. Data gaps are identified early, with a recommendation on whether they are worth filling.
Model and evaluate
Hydrologic and hydraulic modeling of existing and future conditions, then alternatives tested against the criteria agreed at the start.
Recommend and estimate
Prioritized recommendations with planning-level costs, written so they can go straight into a staff report and the budget cycle.
Design and bid
For design projects: PS&E to agency standards, bid support, and construction-phase services through closeout.
Related services
Related projects
Municipal work in Oregon and Washington.
Municipal / Water Resources
West Taft Basin Stormwater Study: PCSWMM Flood Modeling and Capital Recommendations
Lincoln City, Oregon
Delivered by our principal engineer while at a previous firm.
Water Resources / Municipal
South Awbrey Butte 1D/2D Drainage Study for a 594-Acre Basin
Bend, Oregon
Work of a Cascadia Civil principal engineer at a prior firm.
Municipal
Neff and Purcell Corridor Improvements: Retrofit Stormwater Design for a City Capital Project
Bend, Oregon
Completed by our principal engineer at a former firm.
Municipal / Water Resources
Freeman Road Stormwater Pump Station for the SR 167 Highway Extension
Fife, Washington
Hydraulic design by our principal engineer while at a prior firm.
Municipal / Water Resources
212th Avenue SE Flood Mitigation and Fish Passage Feasibility Study
Sammamish, Washington
Managed by a Cascadia Civil principal engineer at a previous firm.
Municipal
Western Avenue Sanitary Sewer Capacity Study for a Utility Conflict
Beaverton, Oregon
Questions
Frequently asked questions.
Do you take on-call contracts with cities and counties?
Yes. Cascadia Civil pursues on-call engineering contracts and direct appointments with public agencies in Oregon and Washington. If your agency keeps a consultant roster, we would be glad to be added to it.
Can a small firm handle public agency projects?
For defined-scope studies and small capital projects, yes, and often more efficiently. The engineer who scopes the work is the one who builds the model and presents the findings. On larger projects we team with partner firms for survey, geotechnical, environmental, and structural work.
What modeling software do you use?
PCSWMM and XP-SWMM for urban drainage systems, HEC-RAS and SRH-2D for rivers, streams, and floodplains, and HydroCAD and MGSFlood for site-scale stormwater, with Civil 3D and GIS for design and mapping. We match the tool to the agency's standards and to any existing models.
Is the agency experience on your site your own or a previous firm's?
Several agency projects shown on this site were completed by our principal engineer while at previous firms, and each one is labeled that way. We include them because they show the experience of the engineer you would be working with.
Start a project
Have a defined problem that needs a senior engineer?
Describe the basin, the facility, or the decision in front of you. We will tell you how we would approach it.