Washington
Pavement Design and Evaluation
Engineered asphalt and concrete pavement sections for roads, parking lots and driveways, plus failing pavement assessments.
What the work involves
Pavement design sets layer thicknesses based on subgrade soil strength and expected traffic, especially truck loads, which do far more damage than cars. Engineers also evaluate cracked, rutted or potholed pavement to decide between crack sealing, mill and overlay, full-depth reclamation or reconstruction. Municipalities use pavement management programs to rate road condition and prioritize repairs across their network.
Local conditions we plan for
- Cascadia Subduction Zone and Seattle Fault seismic hazard
- Landslides on wet slopes
- Liquefiable soils near Puget Sound
- Wildfire east of the Cascades
Building code: 2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026).
When you need it
- New road, parking lot or truck loading area
- Pavement failing within a few years of paving
- Truck traffic increasing at a facility
- Municipal pavement management program
- Deciding between overlay and reconstruction
Frequently asked questions
How much does pavement Design and Evaluation cost?
Across the US, pavement Design and Evaluation usually costs $1,500 to $25,000. Estimate. Single parking lots are at the low end; network pavement management studies for municipalities cost more.
How long does pavement Design and Evaluation take?
Plan on 1 to 6 weeks from signed proposal to stamped deliverables, longer if a site visit, soil testing or a permit review cycle is involved.
Do I need a licensed PE for pavement Design and Evaluation?
In most US jurisdictions, yes. When the work needs a permit, the plans, calculations or report usually must be sealed by a Professional Engineer licensed in the state where the project is located. Every deliverable we issue for permit is sealed that way.
How do I verify an engineer's license in Washington?
Engineers practicing in Washington are licensed by the Washington State Board of Registration for Professional Engineers and Land Surveyors. You can confirm a license number and its status in the board's public license search before you sign a contract.
Which building code applies in Washington?
2021 IBC/IRC adopted at the state level (ICC adoption chart, April 2026). Cities and counties can add local amendments, which is one reason to hire an engineer who works in your area.
What site problems do engineers see most in Washington?
Common issues include cascadia Subduction Zone and Seattle Fault seismic hazard, landslides on wet slopes, liquefiable soils near Puget Sound and wildfire east of the Cascades.