Concrete curbing in 97109 covers Buxton, the small unincorporated community on US-26 northwest of Hillsboro that anchors the Banks-Vernonia State Trail and the Coast Range gateway. This is rural Washington County work -- properties scattered along Timber Road, Cedar Canyon Road, and the Hwy-26 frontage, with a mix of small farms, residential driveways, and the occasional small commercial lot serving Trail and forest traffic. Curbing here is mostly drainage-driven. Clay subsoil and seasonal rain combine to push water across driveways and yards in ways that a properly placed concrete curb can redirect, so most calls in 97109 are about controlling runoff, not about decorative edging.
What 97109 Curbing Jobs Actually Look Like
Buxton residential lots tend to be larger than the Hillsboro suburban norm -- many run 1 to 5 acres with long driveways off the secondary roads. Typical curbing scopes here run 80 to 350 linear feet for driveway edging and 200 to 800 linear feet for full drainage curbing around a property frontage or barn yard. Commercial scopes are rare but real: the small businesses on Hwy-26 frontage and the Banks-Vernonia Trailhead-adjacent commercial occasionally need ADA-compliant curb work as part of larger lot renovations.
We run extruded concrete curb in 97109 the same way we run it across Washington County: a 6-inch base of compacted 3/4-minus crushed rock, a clean grade line marked with paint, and a continuous extrusion machine that lays curb at 5 to 12 inches wide depending on the spec. For drainage curb that needs to redirect significant runoff, we cast the curb at 6 inches tall and key it into the adjacent pavement edge. For decorative landscape edging in residential settings, 4 inches is enough.
Clay Soil, Coast Range Runoff, and Why Curbing Matters
The 97109 footprint sits on the eastern edge of the Coast Range foothills. The subsoil is heavy Willamette Valley clay overlain with thin organic topsoil in the lower areas and basalt-derived loam closer to the ridges. Clay does not drain. Water that lands on a driveway or rolls off a barn roof in this zip travels along the surface until something redirects it. Without curbing, that water typically migrates onto the driveway, erodes the edge, and over a few winters carves a channel that takes the pavement edge with it.
A properly placed concrete curb does two things at once: it defines the driveway edge so the pavement does not ravel, and it directs runoff to a designed exit point -- usually a yard drain, a French drain, or a stub-out to the ditch line along the road. We sometimes pair curbing with a perimeter drain installation on properties where the clay subsoil is holding water against the building or causing chronic mud at gate approaches. That combined scope is more cost-effective than doing them separately.
Industry Cost Picture for 97109 Concrete Curbing
Curbing prices in rural Washington County move with concrete cost, base rock cost, and crew mobilization. Buxton is far enough out from the Portland metro that mobilization is a real line item -- not Tillamook-coast far, but not next-door-to-the-plant close either.
Industry Baseline Range
| Project Type | Cost Per Linear Foot | Typical Total |
|---|---|---|
| Standard extruded curb (4 in tall) | $7 to $13 | $700 to $4,200 |
| Drainage curb (6 in tall, keyed) | $9 to $16 | $1,200 to $6,500 |
| Decorative stamped or colored curb | $12 to $22 | $1,500 to $7,500 |
| Curb + perimeter drain combo | $14 to $26 | $2,500 to $14,000 |
| Commercial ADA curb cut + ramp | $400 to $1,200 each | -- |
Current Market Reality
Concrete cost in the Portland metro and adjacent rural areas has trended up sharply since 2022. Cement prices, aggregate hauling, and ready-mix delivery surcharges have all moved. A linear foot of standard extruded curb that the baseline puts at $8 is more likely $11 to $14 in 97109 today. Drainage curb that needs deeper base prep and an exit-point connection often runs higher than the baseline ceiling. We will not quote rural curbing by phone -- access, slope, and existing grade vary too much between a Timber Road property and a Hwy-26 frontage lot. For context across the county, see our Washington County curbing guide.
Climate, Permits, and the Curbing Pour Window
The 97109 pour window for concrete is wider than the asphalt window but still climate-bound. Concrete needs ambient temperatures above 40 degrees F at pour and through the first 24 to 48 hours of cure, ideally above 50 degrees F. In Buxton, that practically means March through November for most of the zip. The Banks-Vernonia ridge can run cooler longer, so high-elevation residential work sometimes pushes into April-October.
Permits for residential curbing on private property are generally not required in unincorporated Washington County. Commercial curb work that touches the public right-of-way, including driveway approaches off Hwy-26 (which is ODOT Region 1 right-of-way), needs an ODOT encroachment permit. Drainage discharge into a roadside ditch line typically requires county Public Works coordination. We handle the paperwork as part of scope. Site prep work that pairs with curbing -- grading, drain rock placement, perimeter cuts -- is covered in our Washington County excavation work.
How To Hire For This Zip
Three questions for any 97109 curbing bidder. First: what is your base spec and is it included in the bid, or are you quoting curb-only and leaving the base prep to someone else? Second: how are you handling drainage exit points, and have you walked the property to identify where the water needs to go? Third: which ready-mix plant are you sourcing from and what is the haul time? A bidder who hand-waves the drainage question is the bidder whose curb will be undercut by the second winter.
Cojo runs Washington County curbing out of the same equipment yard that covers Hood River and the Gorge. Our concrete operations are detailed at our concrete work page. Paving on the same property is often run by the same crew on the same week -- see our Hillsboro paving guide for that side of the work.
Ready to get 97109 driveway curbing, drainage curb, or a Hwy-26 commercial scope priced? Schedule a free site visit. We will walk the property, mark the curb line, identify the drainage exit, and write a real quote.