Gresham RV park asphalt paving runs in the outer-east Multnomah County corridor that serves as the Mount Hood gateway and the Columbia River Gorge access point. Owner-operators running Sandy Riverfront RV Resort, Mount Hood RV Village, Oxbow Regional area parks, or any Class-A-supporting facility along the Sandy River corridor feel two intensifiers: 60 to 80 freeze-thaw cycles per winter (sharper than inner Portland), and tourism-season occupancy that runs near 100 percent from late May through September. This article walks through what a Gresham-area RV park rebuild actually needs and what it costs in 2026.
Outer-East Freeze-Thaw on RV Pads
Gresham sits at the foot of Mount Hood's western slope, with elevation and Columbia Gorge airshed proximity that drive sharper winter than inner Portland. Annual freeze-thaw cycle counts run 60 to 80 in a typical year, sometimes more when a Gorge east-wind event drops daytime temperatures fast. RV pads see this freeze-thaw cycling exploit any micro-crack at wheel positions: water gets in, expands at freeze, opens the crack a half millimeter, and the next thaw repeats the cycle.
The right defense is a polymer-modified wearing course (PG 70-22 minimum, PG 76-22 preferred) plus an aggressive crack-fill cycle every 12 to 18 months. Multnomah BES stormwater overlay rules apply for any project disturbing more than 500 square feet, adding 4 to 8 weeks of permit lead time. See Oregon asphalt cost benchmarks for the broader cost frame.
Class-A Coach Wheel-Load Mix Design
A Class-A motorhome carries axle weights in the 12,000 to 22,000 pound range -- significant static load over a single tire footprint for days at a time. The right structural section under a Class-A RV pad is 3 to 4 inches of asphalt over 10 to 14 inches of compacted aggregate base on Gresham's silt-and-clay subgrade, with the wearing course mix spec'd at PG 70-22 or PG 76-22 specifically because of the freeze-thaw cycling.
The deeper base requirement on Gresham subgrade compared to better-draining sites is similar to the Tualatin Plain frame -- water that doesn't infiltrate gets pumped into the base under cyclical static load. The Gresham church paving project notes cover related outer-east subgrade discipline for assembly-use sites.
1 Percent Max Cross-Slope Level-Pad Spec
RV manufacturers spec leveling jacks for a maximum cross-slope of 1 percent (roughly 1/8 inch per foot). Beyond that, slide-outs may bind, leveling jacks may not reach their stops, and the refrigerator gas-burner cycling can fault. A pad that paves to a 2 percent cross-slope -- normal for retail parking drainage -- is a failed RV pad.
In Gresham specifically, freeze-thaw cycling can punch up a low spot on the pad over time, turning a properly leveled pad at install into a 1.5 to 2 percent cross-slope pad three winters later. Crack-fill discipline and periodic level checks during the maintenance cycle keep the spec on tolerance. Drainage on a level-pad RV site is handled via longitudinal slope, not cross-slope.
Utility-Pedestal Trench Reinstatement
Each Gresham RV site has a utility pedestal carrying 50-amp electrical, 30-amp electrical, fresh water, sewer dump, and sometimes cable. Supply trenches run from the back of the pad to the pedestal location, crossing the pad perpendicular to the centerline. When the pad gets repaved, those trenches usually need utility work first -- replace old water lines (outer-east sites have freeze-protection concerns), upgrade sewer cleanouts, run 50-amp upgrade conduit -- and then the trench has to be reinstated to match the pad section.
In Gresham specifically, freeze-thaw cycling can punch up the trench reinstatement faster than the surrounding pad if the section is even slightly thinner. The right detail is the same structural section as the surrounding pad, compacted in lifts, with the wearing course finish-graded to match. Our RV pad excavation guide covers the underlying excavation discipline in more depth.
Mount Hood Gateway Tourism Scheduling
Gresham-area RV parks along the Sandy River corridor (Crown Point, Oxbow Regional, Mount Hood gateway parks) see tourism-season occupancy near 100 percent from late May through September -- the same months that are the only viable paving window. Phased work is the standard playbook:
- Schedule the work for early May or late September, before or after peak occupancy.
- Rotate guests out of one section (typically 8 to 20 sites per phase).
- Mill and pave the empty section in a 2 to 4 day cycle.
- Allow 48 to 72 hours of cure before reopening to RV traffic.
- Coordinate utility crews on any pedestal upgrades during the same phase.
Phased work adds 15 to 25 percent over a single-mobilization job. The Gresham parking lot striping work article covers similar outer-east scheduling discipline for commercial lots.
Industry Baseline Range for Gresham RV Park Paving
Pricing depends on site count, structural section, utility-pedestal trench work, freeze-thaw spec upgrades, and tourism-season phasing intensity.
Industry Baseline Range
| Scope | Cost Per Sq Ft | Typical Total |
|---|---|---|
| Sealcoat plus crack-fill (clean lot) | $0.20 to $0.50 | $5,000 to $26,000 |
| Mill 2 inches, repave wearing course | $4.00 to $7.50+ | $40,000 to $210,000+ |
| Full structural rebuild (multi-site) | $8.00 to $14.50+ | $120,000 to $620,000+ |
| Utility-pedestal trench reinstatement | $25 to $65 per lf | $1,200 to $8,500 per pedestal |
Current Market Reality
Gresham RV park paving pricing in 2026 reflects fuel surcharges of 3 to 7 percent, polymer-modified binder upcharges for the freeze-thaw spec, Multnomah BES stormwater permit costs, and tourism-season phasing premiums. A 30-site Gresham RV park that priced at $4.00 per square foot for a mill-and-overlay in 2019 commonly bids $5.50 to $7.25 today after freeze-thaw spec upgrade. Cojo's asphalt maintenance services handle the maintenance-cycle work between major repaves.
Coordinating With KOA, Good Sam, and Franchise Standards
Branded Gresham-area RV parks under KOA, Good Sam, or other franchise umbrellas often have brand standards review on structural rebuilds. Add 10 to 30 days for franchise approval. A coordination call with the owner-operator and the franchise contact confirms spec, color, and brand-specific finish requirements.
Talk to Cojo About Your Gresham RV Park
If you operate a Gresham-area or Mount Hood gateway RV park with rutting at the wheel positions, slide-out binding complaints from guests, freeze-thaw cracking radiating from utility-pedestal trenches, or visible pad-level drift from cyclical freeze damage, the next step is a pad walk. We will measure cross-slope tolerance, document rutting patterns and crack development, walk the utility-pedestal layouts, and write a phased scope that hits the Multnomah paving window and your tourism-season occupancy calendar. To start, schedule a pad walk and we will be at the park within the week.