Portland marina parking lot striping is not a standard lot job. Stalls have to fit a 10-by-40 foot boat trailer plus the tow vehicle behind it -- a 65-foot pull-through or back-in geometry -- and the ADA water-access aisle under Section 1003 of the ABA standards requires a specific accessible route from the parking space to the launch ramp or fishing platform. Add tide-flushed lot drainage at Marine Drive ramps and Multnomah County BES stormwater overlay rules, and a Portland marina striping job runs in a different category than a retail parking lot. This article walks through what a Portland boat-trailer lot actually needs and what it costs in 2026.
Boat Trailer Stall Geometry
A typical retail parking stall is 9 by 18 feet. A boat-trailer stall is roughly 10 by 40 feet to fit the trailer (10 by 16 or 8 by 24 for the boat itself, depending on hull length, plus tow tongue) and the tow vehicle behind it. Pull-through stalls are preferred where the lot geometry allows -- launching a boat by backing down a ramp is enough work without also having to back the trailer into a parking stall after pulling out.
Portland public boat-ramp lots vary in geometry. RiverPlace and Sellwood Riverfront use pull-through stall geometry; Marine Drive Chinook Landing and Hayden Island use a mix of pull-through and back-in to fit the lot footprint to the property line. The right striping plan for a Portland ramp lot starts with a walk to count the launch lanes, measure the lot footprint, identify the ADA-accessible route from parking to ramp, and confirm any seasonal high-water elevations that would change usable lot area. See Portland parking lot striping work for the broader striping context.
ADA Water-Access Aisle (Section 1003)
The Architectural Barriers Act standards Section 1003 covers recreation facilities -- including boat launches, fishing piers, and other water-access points. The accessible route from a designated parking space to the water-access point must be at least 60 inches wide and slope no more than 1:20 unless equipped with handrails. The accessible parking space itself must be sized for a van-accessible vehicle with a 96-inch-minimum access aisle.
In practice this means a marina lot needs at least one accessible boat-trailer stall placed where the route to the launch ramp or fishing platform is direct and within slope tolerance. The accessible stall is typically wider (12 to 14 feet) and includes an 8-foot access aisle striped to ADA standards. The striping spec for the accessible stall, the access aisle, and the curb ramp at the lot-to-ramp transition is the load-bearing detail that an inspector will pull up on a permit walkthrough.
Tide-Flushed Lot Drainage at Columbia River Ramps
Portland marina lots along the Columbia (Marine Drive Chinook Landing, M James Gleason boat ramp, Hayden Island) experience tide-flushed drainage. The lower Columbia tidal range runs roughly 2 to 3 feet at Portland, which means the storm system at a low-bench ramp lot may run full at high tide and drain partially at low tide. Striping paint applied to wet pavement does not bond properly -- the paint film lifts within weeks and the line disappears.
The right scheduling for Columbia-shore restripe work is a low-tide window, dry weather (asphalt at 60 degrees F or higher), and a 24-hour cure before the next high water touches the line. Multnomah County BES stormwater overlay rules also apply if any restripe project disturbs or modifies the lot drainage in a way that triggers their threshold.
Restripe Cycle for a Marina Lot
Portland marina lots see less day-to-day vehicle wear than a retail lot, but UV exposure and seasonal tide-flush expose striping paint to more weathering than a covered or shaded lot. A reasonable restripe cycle for a Portland boat-trailer lot is 24 to 36 months for high-traffic ramps and 36 to 48 months for shoulder-season ramps with mostly weekend volume.
Paint selection matters. Waterborne acrylic latex is cost-effective for short-cycle restripe; thermoplastic costs more upfront but holds up to tide-flush and trailer-tire wear longer. The right call on a Portland marina lot is usually thermoplastic at the boat-trailer stall lines and waterborne acrylic at the secondary markings. The Portland apartment sealcoating cycle covers similar long-cycle maintenance economics for adjacent commercial property managers.
Industry Baseline Range for Portland Marina Striping
Pricing depends on lot size, stall count, ADA scope, and whether the project includes prep work (crack-fill, patch, sealcoat) before striping.
Industry Baseline Range
| Scope | Cost Per Lf or Stall | Typical Total |
|---|---|---|
| Restripe boat-trailer stalls (waterborne) | $0.30 to $0.60 per lf | $1,500 to $7,500 |
| Restripe boat-trailer stalls (thermoplastic) | $1.50 to $3.50 per lf | $7,000 to $30,000 |
| ADA accessible stall + access aisle + symbol | $250 to $500 per stall | $250 to $2,500 |
| Full lot restripe including ADA and signage | $0.05 to $0.20 per sq ft | $2,000 to $20,000+ |
Current Market Reality
Portland marina striping pricing in 2026 reflects paint cost increases of roughly 20 percent since 2019, thermoplastic material that has roughly doubled at the supply level, and the labor cost of tide-window scheduling at Columbia-shore ramps. A 40-stall boat-trailer lot that priced at $4,000 for a waterborne restripe in 2019 commonly bids $5,500 to $7,500 today. ADA compliance work on a non-compliant legacy lot adds significantly because the accessible stall, access aisle, and route-to-ramp slope often require pavement work, not just striping. See Oregon asphalt cost benchmarks for the broader cost frame.
Working With the Harbor Master and Metro Authority
Portland public boat ramps under Metro regional parks (Chinook Landing, Glenn Otto, Blue Lake) coordinate through Metro events and park operations. RiverPlace and Sellwood Riverfront route through Portland Parks and Recreation. The Port of Portland operates the Marine Drive corridor. Each authority has its own procurement cycle, RFP timing, and contractor pre-qualification process. A harbor master coordinating a striping refresh typically pulls 2 to 3 quotes against a written scope; the right scope spec includes ADA compliance details, paint type, stall count, and the seasonal high-water elevation reference.
Cojo's broader asphalt maintenance services and the RV pad excavation guide cover related work that often pairs with marina-lot maintenance.
Talk to Cojo About Your Portland Marina Lot
If you operate a Portland public boat ramp or private marina and the boat-trailer stalls have faded, the ADA accessible route to the ramp is unclear, or the lot has not been restriped in three or more years, the next step is a launch-ramp walk. We will measure stall geometry, confirm ADA compliance scope, document tide-flush exposure, and write a written scope with a Portland-specific range. To start, schedule a launch-ramp walk and we will be at the ramp lot within the week.