Concrete curbing in 97380 covers the town of Siletz, the Hwy-229 corridor running north to Toledo and south to Logsden, and the residential and commercial parcels around the Confederated Tribes of Siletz Indians government campus. Most curbing work here is drainage-driven -- this side of the Lincoln County coast range gets 90-plus inches of rain per year, and any commercial lot or institutional parcel without proper curb and gutter will see water sheet across asphalt and erode shoulders within a season. Cojo runs Siletz jobs out of our Hood River yard with crews dispatched for the May-to-October concrete pour window, and we know how Lincoln County permitting and the Tribal procurement process differ.
What 97380 Curbing Jobs Actually Look Like
The 97380 zip is small but service work splits into three categories. Tribal commercial work includes the government campus, health clinic approach, tribal-housing parcels, and community-center frontage -- curb runs here are typically extruded concrete curb tying into asphalt edge drainage, ADA ramp work at building approaches, and parking-lot island curb for new lot construction. Town of Siletz work includes the school district facilities along W Buford Ave, the community building, and the downtown blocks on SE Logsden -- mostly drainage curb upgrades and ADA compliance retrofits. Residential work in the surrounding rural zip is mostly driveway edge curb, retaining-style mow strips on hillside lots, and occasional decorative landscape curb on the larger parcels.
Practical scope on Siletz work tracks like this. A school or community-center ADA retrofit might be 80 to 250 linear feet of curb and ramp work. A tribal commercial lot frontage runs 200 to 600 linear feet for full perimeter curb. A residential mow strip or driveway edge curb is 100 to 400 linear feet. We extrude curb at 6-inch height with proper concrete spec for coastal exposure, set rebar where the curb takes load, and tie drainage into existing catch basins or new dry-well infiltration on parcels with no storm sewer.
Lincoln County Coast Climate and Concrete Spec
Siletz sits inland from the immediate coast but still inside the Lincoln County wet-climate envelope. That changes the concrete spec. The valley standard 4,000 psi mix with no air entrainment will not last here -- coastal salt aerosol, freeze-thaw at the higher elevations toward Logsden, and constant wet-dry cycling will spall and crack the surface within five years. Our standard 97380 curb spec is 4,500 psi mix with 5 to 7 percent air entrainment and Type II cement for sulfate resistance. On parcels closer to the Siletz River, we bump that to a corrosion-inhibitor admix because the groundwater here carries enough chloride to attack rebar through the concrete cover.
The pour window matters too. Concrete needs at least 50 degrees F for proper hydration in the first 48 hours, and ambient overnight lows below 40 degrees F in the Siletz valley happen as late as mid-April. We schedule curb pours May through early October for that reason, with a tighter window for any decorative or stamped work where surface appearance matters. A contractor who offers to pour your curb in January for a discount is gambling with your money -- the concrete will not develop full strength and you will see it.
Industry Cost Picture for 97380 Curbing
Cost in Siletz is driven by haul distance from the Newport or Toledo concrete plants, the specific mix spec for coastal exposure, and whether the work requires ADA compliance or storm-drain tie-ins.
Industry Baseline Range
| Project Type | Cost Per Linear Ft | Typical Total |
|---|---|---|
| Residential mow strip / decorative curb | $7 to $15 | $700 to $4,500 |
| Driveway edge curb, no drainage | $8 to $18 | $800 to $6,000 |
| Commercial parking-lot perimeter curb | $12 to $25 | $4,000 to $15,000 |
| ADA ramp and curb-cut retrofit | $400 to $1,200 each | $1,500 to $12,000+ |
| Curb plus inlet drainage tie-in | $20 to $45 | $5,000 to $30,000+ |
Current Market Reality
Concrete material cost is up significantly from 2019 baseline, driven by cement-mill price increases, fuel for ready-mix delivery, and steel rebar pricing. Haul distance from the Newport plant adds real cost for any pour over 5 yards. A residential mow-strip job the baseline frames at $7 a linear foot is more likely $10 to $13 here today. ADA retrofit work is the most volatile line item because permit and inspection timelines, plus the specific ramp slope tolerance, push real cost above baseline. We do not quote curbing over the phone -- a real number takes a site visit and a tape measure. For broader context, see our concrete curbing cost per foot in 2026 guide.
Permits, Tribal Procurement, and the Siletz River Setback
Lincoln County Public Works runs unincorporated 97380 permits, with the City of Siletz handling town-limit work and the Confederated Tribes of Siletz Indians handling all curbing on Tribal trust land. Tribal procurement requires specific contractor qualifications, insurance levels, and often a Tribal preference review -- we work that paperwork in advance when bidding Tribal jobs. ADA work in any public-facing parking lot has to meet the federal 2010 ADA Standards plus Oregon-specific accessibility code, which is stricter on slope tolerance than the federal floor.
Any work within 100 feet of the Siletz River triggers Oregon DSL setback review and may require an in-water work permit if your project involves stormwater discharge. Curb work itself usually does not trigger that, but the drainage tie-in might. We handle the setback paperwork as part of the bid. Stormwater discharge over 1 acre disturbed area triggers DEQ 1200-C, which we file when needed.
How To Hire For This Zip
Ask three things of any 97380 bidder. First: what concrete mix spec are you running and is it appropriate for Lincoln County coastal exposure? Second: when does your crew plan to pour, and what is the cold-weather contingency? Third: if my project is on Tribal trust land or touches the Siletz right-of-way, who is handling that permit conversation? A bidder who has not worked Lincoln County coast jobs is going to spec the wrong mix and the concrete will tell on them within five winters.
Cojo runs Siletz-area work alongside our sealcoating in Lincoln County routes and our nearby Lincoln County coastal paving in Gleneden Beach crews, so commercial lot work that needs paving plus curb plus striping goes through one company. Full equipment list and finish options are on our concrete services page.
Ready to price a 97380 curb job? Schedule a free site visit and we will walk the site, measure linear footage, confirm drainage tie-ins, and give you a written quote that holds up against coastal conditions. No phone-quote shortcuts.