Structure 31C53 739 · Jefferson County, OR

Coleman RD over Trout Creek

Carries Coleman RD over Trout Creek, 5.5 Mi NE Of Gateway.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT82 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 7/9

82 ft end to end. Lengths and the car 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 through truss.

Built1965rebuilt 1984
Length82.0 ft25 m
Daily traffic62counted 2020
Last inspectedNovember 2024every 12 months

Location

StateOregon
CountyJefferson
Location5.5 Mi NE Of Gateway
CarriesColeman RD
CrossesTrout Creek
Coordinates44.81021, -121.06982

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length82.0 ft (25 m)
Max Span80.1 ft (24.4 m)
Deck Width15.1 ft (4.6 m)
Deck Area115 sq m
Main Spans1
Year Built1965 (reconstructed 1984)

Traffic

Avg Daily Traffic62 (2020)
Lanes On Bridge1

Inspection & Ownership

Last InspectionNovember 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number31C53 739

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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