OR 206 (HWY 301)

over DESCHUTES RIVER

029 MI E CELILO, Wasco County, Oregon

Condition

Fair

Year Built

1955

Daily Traffic

761

Length

66 ft

About This Bridge

OR 206 (HWY 301) carries traffic over DESCHUTES RIVER in Wasco County, Oregon. Built in 1955, this structure is 71 years old, placing it among the older bridges still in active service. The bridge features concrete continuous construction with a girder and floorbeam design, a combination chosen by engineers to meet the specific requirements of this crossing.

Approximately 761 vehicles cross this bridge daily, indicating lower traffic volumes common for local roads and rural routes. While traffic is lighter, these bridges still serve essential community transportation needs. Commercial trucks account for 21% of all crossings. This heavy commercial usage significantly impacts structural wear, as a single fully-loaded truck can cause as much deck wear as thousands of passenger vehicles. Transportation planners factor this into maintenance scheduling and budget allocation.

The bridge is currently rated in fair condition based on federal inspection criteria established by the Federal Highway Administration. The structure meets current safety standards for its designated use and load capacity. With a total length of 66 feet, this is a shorter span typical of local road crossings, often carrying traffic over small streams, drainage channels, or other roadways.

The construction materials used in this bridge were selected based on engineering requirements, cost considerations, and local conditions at the time of construction.

Federal law requires that all highway bridges be inspected at least every 24 months by qualified inspectors following the National Bridge Inspection Standards (NBIS). Some bridges with known issues or unusual characteristics may be inspected more frequently. Inspection data is reported to the National Bridge Inventory, a database maintained by the Federal Highway Administration that tracks the condition of all public highway bridges in the United States. This bridge data is sourced from that federal database and reflects the most recent available inspection results.

Condition Ratings

6

Deck Condition

Satisfactory

6

Superstructure

Satisfactory

5

Substructure

Fair

6

Channel & Protection

Satisfactory

5

Lowest Rating

Determines condition category

NBI condition ratings range from 0 (failed) to 9 (excellent). Ratings of 4 or below are considered poor. The overall condition category is determined by the lowest individual component rating.

The fair condition rating of 5 indicates some deterioration that warrants monitoring but doesn't affect structural integrity.

For a structure built in 1955, this condition level is expected given the bridge's age and usage patterns. If this bridge were closed, traffic would face a detour of approximately 12 miles, underscoring the importance of maintaining this crossing.

Bridge Details

Concrete Continuous is the primary structural material, which influences maintenance requirements and expected lifespan. The girder and floorbeam design was selected based on span requirements, load capacity needs, and site conditions at the time of construction. Maintenance responsibility falls to State Highway Agency.

Construction

Year Built1955
MaterialConcrete Continuous
Design TypeGirder and Floorbeam
OwnerState Highway Agency

Dimensions

Total Length66 ft (20.0 m)
Max Span9 ft (2.7 m)
Deck Width4 ft
Deck Area2,139 sq ft

Span dimensions affect structural design choices and load distribution. The deck area of 2,139 sq ft determines surface maintenance scope.

Classification

Route TypeState Highway
Route Number206
Lanes On Bridge2
Lanes Under Bridge

Status

Toll BridgeNo
Historical SignificanceNot determined
Scour CriticalU
Detour Length12 mi (20 km)

Traffic Data

Traffic volume data helps engineers assess bridge wear patterns and plan maintenance schedules. Average Daily Traffic (ADT) counts are updated periodically and represent typical weekday usage.

761

Avg Daily Traffic (2020)

Vehicles per day crossing this bridge

21%

Truck Traffic

Commercial vehicle percentage

900

Projected Future ADT

Estimated future demand

This bridge carries approximately 761 vehicles per day, translating to roughly 277,765 crossings annually. Lower traffic volumes generally result in less structural wear over time.

Commercial trucks comprise 21% of traffic. Heavy vehicles cause disproportionate wear—a single fully loaded truck can have the impact of thousands of passenger cars on bridge deck surfaces. This high percentage of truck traffic may accelerate deterioration of deck surfaces and structural components.

Traffic projections estimate future volumes of 900 vehicles daily, a 18% increase from current levels. These projections inform capacity planning and potential upgrade requirements.

Load Ratings

Load ratings determine what weight this bridge can safely support. These values are critical for routing heavy vehicles and issuing overweight permits.

Operating Rating

2.1 tons

Maximum allowable load for special permits

Inventory Rating

1.6 tons

Load level for normal traffic

The operating rating of 2.1 tons represents the absolute maximum load this bridge can carry under controlled conditions with special permits. The inventory rating of 1.6 tons is the safe load limit for everyday traffic without restrictions. These relatively low ratings may result in posted weight limits or route restrictions for heavy vehicles.

5-Year Condition Trend

Declining

Condition has declined by 1.0 rating points since 2020

Data: 2020-2024 FHWA National Bridge Inventory

Location

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45.711111, -122.291111

Identification

Structure Number00332 301 00291
NBI IDOR-00332 301 00291
State FIPS41
County FIPS065

Explore More

Data Source: Federal Highway Administration (FHWA) National Bridge Inventory 2024

Bridge inspection data is typically updated every 24 months. Conditions may have changed since the last inspection.

“Structurally deficient” does not mean a bridge is unsafe or likely to collapse. It indicates that one or more key structural elements are in poor or worse condition. Bridges are inspected regularly and may have load restrictions in place.

This data is for informational purposes only and should not be used for route clearance or vehicle weight decisions.

OR 206 (HWY 301) over DESCHUTES RIVER | Oregon