Structure 8345 004 27371 · Klamath County, OR

US 97 (hwy 004) over Usbr Canal

Carries US 97 (hwy 004) over Usbr Canal, 011 Mi S HWY 50 Jct.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT272 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

272 ft end to end: about 4 semi-trucks nose to tail. 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 multi-beam bridge.

Built1959rebuilt 1992
Length272.0 ft82.9 m
Daily traffic7,421counted 2022
Last inspectedFebruary 2023every 24 months

Location

StateOregon
CountyKlamath
Location011 Mi S HWY 50 Jct
CarriesUS 97 (hwy 004)
CrossesUsbr Canal
Coordinates42.23779, -121.79673

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length272.0 ft (82.9 m)
Max Span94.2 ft (28.7 m)
Deck Width62.7 ft (19.1 m)
Deck Area1583.4 sq m
Main Spans1
Year Built1959 (reconstructed 1992)

Traffic

Avg Daily Traffic7,421 (2022)
Truck Traffic13%
Lanes On Bridge4

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical9 — Foundation above flood level
Structure Number08345 004 27371

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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