Cojo installs extruded and poured concrete curbing across the 97133 zip -- North Plains, the small Washington County town along US-26 northwest of Hillsboro. The local work splits among subdivision drainage curbs on the south and east build-out, downtown sidewalk-and-curb repair on Commercial Street, and US-26 corridor commercial curbing for truck-stop and service-business lots. Pricing depends on linear footage, curb profile, and access, but most local jobs land within the published baseline range below.
Concrete Curbing in North Plains -- The Local Picture
North Plains has a population of about 3,500 and a commercial profile defined by its position on US-26 -- the main truck-and-traveler route from the Portland metro to the Oregon coast. That gives 97133 three distinct curbing scopes:
Subdivision build-out. South and east edges of town have seen residential subdivision growth over the last 15 years. New-construction extruded curb for subdivision streets, plus residential drainage curb for individual lots in the newer developments.
Downtown core. The historic Commercial Street grid has older curbs dating to the 1960s-1980s. Most existing curb is in repair-and-replace territory, with periodic ADA cut additions where the city upgrades pedestrian access.
US-26 corridor. Truck stops, gas stations, and small commercial lots fronting the highway need heavy-duty curbing for truck traffic, parking-perimeter curbing for the customer lots, and the occasional fuel-island curb retrofit.
Washington County stormwater code applies to anything that affects drainage above defined thresholds. New subdivision curbing and commercial parking-lot curbing typically require permits and approved drainage plans. Residential drainage curbing on private lots usually stays below the permit line as long as it doesn't change drainage to public right-of-way.
Curb Types We Install in 97133
Four curb types cover the local work:
- Extruded curb (machine-formed) -- the standard for subdivision streets and parking-lot perimeters. Fast, consistent, cost-effective.
- Poured curb and gutter -- used for sidewalk tie-ins, ADA ramp transitions, and complex transitions where the extruded machine can't form.
- Mountable rolled curb -- for subdivision streets where residents drive across the curb to access driveways.
- Heavy-duty commercial curb -- thicker profile and reinforced section for truck-traffic surfaces along US-26.
The right type depends on what the curb has to do. We spec during the on-site walkthrough.
Concrete Curbing Cost in 97133
Industry Baseline Range
| Scope | Cost Per Linear Foot | Typical Total |
|---|---|---|
| Extruded curb (subdivision/parking lot) | $5 to $12 | $1,500 to $20,000+ |
| Poured curb and gutter (commercial) | $14 to $30 | $5,000 to $50,000+ |
| Rolled mountable curb (residential) | $7 to $15 | $2,000 to $10,000+ |
| Curb repair/replacement (per section) | $200 to $800+ | varies |
| Heavy-duty commercial curb | $18 to $40+ | varies |
Current Market Reality
The published ranges assume reasonable access for a curb machine, a clean site, and a single mobilization. 97133 is about 25 to 30 miles from our Hood River HQ and within the Washington County contractor circuit; mobilization is folded into a multi-job route when possible. Standalone small jobs carry proportional travel cost. Concrete mix prices have moved sharply over the last two years -- 30 to 50 percent in some periods -- and quotes older than 30 days should be re-validated. Heavy-duty commercial curb for US-26 truck-traffic surfaces requires more material per linear foot, which is reflected in the higher range.
Freeze-Thaw and Tualatin Valley Subgrade
North Plains sits at about 200 feet elevation with the standard Tualatin Valley freeze-thaw profile -- 30 to 45 cycles per year. That drives measurable curb deterioration over time without proper mix design and joint spacing.
Mitigations on every job:
- Air-entrained concrete mix -- 5 to 7 percent entrained air to absorb freeze expansion.
- Subgrade compaction -- a curb on uncompacted base settles, cracks at the settlement, and lets water in.
- Control joints every 10 feet -- extruded curb without joints cracks wherever; control joints set the failure location.
97133 subgrade is mostly Aloha silt loam over a clay subsoil. The clay holds water hard in the wet season, which makes subdivision drainage curbs structural drainage elements, not just decorative edges. We size the gutter pan to match the actual rain-event flow during the on-site walkthrough.
For deeper context on extruded vs poured systems, see our extruded vs poured curb article. For longevity expectations in wet Oregon climates, see how long concrete curbing lasts.
US-26 Corridor Considerations
Truck-traffic surfaces along US-26 have specific curbing requirements that differ from standard subdivision work:
- Heavier section. Standard 6-inch curb gets crushed by repeated truck-trailer impact. Heavy-duty section runs 8 to 12 inches thick.
- Reinforcement. Rebar or fiber reinforcement in high-traffic positions.
- Higher PSI mix. Move up from 3,000 PSI standard to 4,000 to 4,500 PSI for truck-traffic surfaces.
- More frequent joints. Joint spacing can drop to 6 to 8 feet to handle the additional load cycling.
These specs add cost but pay back in longevity. A standard residential-spec curb in a truck-traffic position fails by year 3 to 5; a properly specified heavy-duty curb lasts 20 to 30 years.
Picking a Curbing Contractor for 97133
What to verify:
- Oregon CCB license -- required by law.
- Mix design -- PSI and air entrainment percent.
- Joint plan -- control joint spacing on the quote.
- Drainage spec -- for any new-construction work, gutter pan and back-angle should match site grade.
- Reinforcement -- for heavy-duty positions, the quote should call out rebar or fiber.
- Mobilization plan -- ask if route-coordinated scheduling is available with adjacent Washington County work.
- Insurance -- general liability and workers' comp.
For broader pricing context, our concrete curbing cost guide covers the full Oregon picture.
Get a Curbing Quote for North Plains 97133
Cojo runs curbing crews across Washington County and the Tualatin Valley from our Hood River HQ and regional field operations. We hold an Oregon CCB license, carry general liability and workers' comp insurance, and quote against the actual site. If you need new-construction extruded curb in a North Plains subdivision, a US-26 commercial lot curb, or downtown sidewalk-and-curb repair, request a quote or browse our concrete services page for scope detail.