Structure 25E09 C30500006 · Harney County, OR

Drewsey RD over Middle Fork Malheur Rive

Carries Drewsey RD over Middle Fork Malheur Rive, 006 Mi C306 At Drewsey.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT138 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

138 ft end to end, longest span 51 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a tee-beam bridge.

Built195769 years old
Length138.1 ft42.1 m
Daily traffic169counted 2020
Last inspectedSeptember 2024every 24 months

Location

StateOregon
CountyHarney
Location006 Mi C306 At Drewsey
CarriesDrewsey RD
CrossesMiddle Fork Malheur Rive
Coordinates43.81096, -118.37553

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length138.1 ft (42.1 m)
Max Span50.9 ft (15.5 m)
Deck Width28.5 ft (8.7 m)
Deck Area366.3 sq m
Main Spans3
Year Built1957

Traffic

Avg Daily Traffic169 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number25E09 C30500006

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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