Structure 2770 370 00385 · Crook County, OR

HWY 370 over N Unit Ochoco Main Canal

Carries HWY 370 over N Unit Ochoco Main Canal, 039 Mi E HWY 4 Jct.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT50 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

50 ft end to end, longest span 24 ft. 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 tee-beam bridge.

Built194581 years old
Length49.9 ft15.2 m
Daily traffic2,001counted 2022
Last inspectedMarch 2023every 24 months

Location

StateOregon
CountyCrook
Location039 Mi E HWY 4 Jct
CarriesHWY 370
CrossesN Unit Ochoco Main Canal
Coordinates44.32718, -121.10772

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length49.9 ft (15.2 m)
Max Span24.0 ft (7.3 m)
Deck Width28.2 ft (8.6 m)
Deck Area130.7 sq m
Main Spans2
Year Built1945

Traffic

Avg Daily Traffic2,001 (2022)
Truck Traffic24%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number02770 370 00385

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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