Structure 35C156099300097 · Klamath County, OR

Malone Road over Lost River

Carries Malone Road over Lost River, 0097 Mi S Of HWY 39.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT309 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

309 ft end to end, longest span 70 ft: 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 slab bridge.

Built198937 years old
Length309.1 ft94.2 m
Daily traffic1,320counted 2020
Last inspectedMarch 2023every 24 months

Location

StateOregon
CountyKlamath
Location0097 Mi S Of HWY 39
CarriesMalone Road
CrossesLost River
Coordinates42.01054, -121.56098

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length309.1 ft (94.2 m)
Max Span69.9 ft (21.3 m)
Deck Width32.2 ft (9.8 m)
Deck Area923.2 sq m
Main Spans5
Year Built1989

Traffic

Avg Daily Traffic1,320 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number35C156099300097

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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