A medical office building (MOB) in Bend has the same ADA accessibility obligations as any healthcare facility in the country, plus a unique frost-heave challenge that adds a layer to the curb-ramp installation discipline. The 2010 ADA Standards for Accessible Design, Section 406, set the slope, width, landing, and detectable-warning requirements. Bend's high-desert frost depth pushes concrete sub-base preparation deeper than Willamette Valley equivalents, and existing ramps that were poured to a Valley spec often fail compliance after a few freeze-thaw cycles. Cojo installs ADA-compliant curb ramps at Bend Deschutes County MOBs, and this guide explains the scope.
ADA 2010 Section 406, the Field Version
Section 406 sets a running slope of 1:12 maximum (8.33 percent), a cross slope of 1:48 maximum (2.08 percent), a ramp width of 36 inches minimum, and a level landing at the top of the ramp at least 36 by 36 inches. Flare slopes on the sides of a ramp where they transition to the adjacent walking surface are limited to 1:10 (10 percent) maximum. Detectable warning surfaces (truncated domes) are required at the bottom of every ramp meeting a vehicular route -- they extend the full ramp width and 24 inches deep in the direction of travel.
In Bend, the most common compliance failure mode is frost-heave drift rather than original-pour cross-slope error. A ramp poured to spec in 2008 may have heaved 1 to 3 percent on the cross-slope by 2020 because the sub-base was not deep enough to escape the local frost depth. The ADA curb ramp slope requirements reference page covers field measurement and the remediation decision.
Frost Depth and Sub-Base Discipline
Bend sits at roughly 3,600 feet elevation. Frost depth in Deschutes County runs 12 to 18 inches in typical winters, with deeper penetration on north-facing exposures. A curb ramp sub-base needs to extend below the frost depth or use a frost-stable aggregate base with positive drainage to prevent the heave that throws cross-slope compliance off over time.
The standard fix is a 12-inch compacted aggregate base under the ramp slab, with the slab itself thickened to 6 inches and reinforced with fiber-mesh or rebar. That section runs 25 to 40 percent more than a Valley-spec ramp but holds compliance through the freeze-thaw cycle count. Cutting corners on the sub-base is the single most expensive mistake on a Bend MOB curb-ramp installation -- a non-compliant heave usually means tearing out and re-pouring the same ramp at full cost within 5 to 10 years.
Deschutes County and City of Bend Permitting
City of Bend permitting for ADA curb ramp installation depends on scope. A single-ramp replacement on an existing accessible route generally falls under a minor public-works permit. A multi-ramp project that affects pedestrian circulation patterns may trigger a site-development review. Bend's Engineering and Infrastructure Planning department coordinates on ramps interfacing with the public right-of-way.
St Charles Health System and other major Bend healthcare operators maintain field-measured ramp inventories that include the frost-heave-driven compliance failures, which streamlines the bid-document preparation versus an inventory built only on as-poured measurements.
Industry Baseline Range
| Project Type | Cost Per Ramp | Typical Project |
|---|---|---|
| Single ramp replacement (frost-rated) | $2,200 to $5,500 | $2,200 to $5,500 |
| Multi-ramp replacement (5 to 10 ramps) | $1,800 to $4,500 per ramp | $9,000 to $45,000+ |
| Ramp + adjacent sidewalk panel | $2,800 to $7,200 | $2,800 to $7,200 |
| Detectable warning retrofit (only) | $450 to $1,300 per panel | $450 to $13,000+ |
Current Market Reality
Bend MOB ADA scopes rarely land at baseline. The frost-rated sub-base premium, after-hours premium labor, ambulance-access traffic-control at St Charles-adjacent MOBs, concrete-cure waits in cool-overnight shoulder seasons, and longer transport distance for high-early-strength concrete mixes (the nearest ready-mix plants serve a wider geography in Central Oregon) all push the real number up.
Phasing Around the Bend Climate Window
Bend's concrete-pour window is more constrained than Valley markets. Overnight temperatures need to stay above 40 degrees F during the cure to avoid frost damage in the green concrete. The clean pour window runs late May through mid-October, with shoulder-season pours requiring blankets or heated enclosures.
Most Bend MOBs operate Monday-through-Friday clinic hours with reduced weekend coverage, which gives a Friday-evening-through-Sunday phasing window. High-early-strength mixes get the ramp back into service in 24 to 48 hours and make the single-weekend phasing workable for most single-ramp scopes.
Cojo's concrete services handles the ramp installation, with related Bend parking lot striping for ADA accessible stall layout, accessible-aisle painting, and ADA signage post-install. The Oregon asphalt paving cost baseline covers parking-lot scopes including both asphalt and concrete work.
What the Practice Manager and MOB Operations Lead Decide
The buyer at a Bend MOB is usually the practice manager (single-tenant MOB) or the MOB operations lead (multi-tenant MOB). Three levers move cost: scope (single ramp, full inventory, or partial), schedule (clean-season pour or shoulder-season with enclosures), and sub-base spec (frost-rated or Valley-spec at reduced cost but with shorter service life). The frost-rated upgrade almost always wins on Bend MOB scopes because the alternative is a 5-to-10-year tear-out cycle.
For MOBs that are part of a campus ADA upgrade, bundling the curb ramp work with parking-lot restripe per hospital and medical office striping discipline reduces mobilization overhead by 10 to 15 percent.
Common Failure Patterns Found at Site Walks
A site walk of an existing Bend MOB accessible route usually surfaces three high-desert-specific failure patterns. The first is frost-heave cross-slope drift -- a ramp poured to 1:48 in 2010 may now read 1:30 or worse after a decade of freeze-thaw cycling on an insufficiently-deep aggregate base. The second is detectable-warning panel failure where the embedded truncated-dome surface has cracked or lifted from frost cycling underneath. The third is flare-slope spalling at the side transitions, where freeze-thaw has chipped the concrete edge to the point where the slope geometry no longer matches the original 1:10 spec.
The fix in every case is removal and replacement on a frost-rated sub-base. Patch repairs on heaved ramps almost never hold -- the underlying sub-base problem remains, and the patch fails inside one to two winters. Bend MOB facility managers who try to manage compliance through patch repair rather than full replacement typically end up paying the full replacement cost anyway, just with extra patch-repair cycles in between.
Get a Bend MOB ADA Curb Ramp Quote
Every Bend MOB curb ramp scope sits on its own combination of frost-heave history, patient-access constraint, and clean-season pour window. The only way to land an accurate number is a site walk with field measurement of every ramp on the accessible route. Cojo is CCB licensed and insured and has installed ADA curb ramps at MOBs across Deschutes County from the St Charles corridor to private clinics in the Old Mill District and along Highway 97. Contact us at /contact to schedule the walk.