HWY 210 EB

over Willamette River

001 E HWY 31 & 210 JCT, Benton County, Oregon

Condition

Poor

Year Built

1913

Daily Traffic

9,913

Length

71 ft

About This Bridge

HWY 210 EB carries traffic over Willamette River in Benton County, Oregon. Built in 1913, this structure is 113 years old, making it a historic structure that has served the community for generations. The bridge features steel construction with a truss - thru design, a combination chosen by engineers to meet the specific requirements of this crossing.

Approximately 9,913 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 7% of all crossings. This proportion of commercial traffic is typical for this roadway classification and is factored into the bridge's design load ratings.

The bridge is currently rated in poor condition based on federal inspection criteria established by the Federal Highway Administration. It is classified as structurally deficient, meaning one or more components have received a rating of 4 or below on the 0-9 scale. This designation indicates significant deterioration that warrants attention, though the bridge remains safe for travel within its posted limits. Structurally deficient does not mean unsafe—rather, it signals that repairs or replacement should be prioritized in transportation planning. With a total length of 71 feet, this is a shorter span typical of local road crossings, often carrying traffic over small streams, drainage channels, or other roadways.

Steel bridges provide high strength-to-weight ratios, making them suitable for longer spans. However, they require ongoing protection against corrosion through painting or weathering steel designs. Inspectors pay close attention to connection points, fatigue cracking, and coating condition.

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

Structurally Deficient

This bridge has one or more component ratings of 4 or below, indicating significant deterioration that requires attention. The bridge remains safe for travel but may have load restrictions.

6

Deck Condition

Satisfactory

5

Superstructure

Fair

4

Substructure

Poor

6

Channel & Protection

Satisfactory

4

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 substructure rating of 4 reflects significant wear in piers, abutments, or foundations.

For a structure built in 1913, the current condition reflects the cumulative effects of age, traffic, and environmental exposure.

Bridge Details

Steel is the primary structural material, which influences maintenance requirements and expected lifespan. The truss - thru 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 Built1913
Year Reconstructed1998
MaterialSteel
Design TypeTruss - Thru
OwnerState Highway Agency

Dimensions

Total Length71 ft (21.7 m)
Max Span17 ft (5.3 m)
Deck Width3 ft
Deck Area1,718 sq ft

Span dimensions affect structural design choices and load distribution. The deck area of 1,718 sq ft determines surface maintenance scope.

Classification

Route TypeState Highway
Route Number34
Lanes On Bridge1
Lanes Under Bridge

Status

Toll BridgeNo
Historical SignificanceEligible for NRHP
Scour Critical3
Detour Length

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.

9,913

Avg Daily Traffic (2020)

Vehicles per day crossing this bridge

7%

Truck Traffic

Commercial vehicle percentage

13,400

Projected Future ADT

Estimated future demand

This bridge carries approximately 9,913 vehicles per day, translating to roughly 3,618,245 crossings annually. Lower traffic volumes generally result in less structural wear over time.

Commercial trucks comprise 7% 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.

Traffic projections estimate future volumes of 13,400 vehicles daily, a 35% 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

0.7 tons

Maximum allowable load for special permits

Inventory Rating

0.6 tons

Load level for normal traffic

The operating rating of 0.7 tons represents the absolute maximum load this bridge can carry under controlled conditions with special permits. The inventory rating of 0.6 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

Stable

Condition has remained relatively stable since 2020

Status Changes

  • Exited poor condition in 2023
  • No longer structurally deficient as of 2023
  • Entered poor condition in 2024
  • Became structurally deficient in 2024

Data: 2020-2024 FHWA National Bridge Inventory

Location

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46.093056, -123.903333

Identification

Structure Number02728 210 00013
NBI IDOR-02728 210 00013
State FIPS41
County FIPS003

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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.

HWY 210 EB over Willamette River | Oregon