Structure 1821E009 19098 · Lane County, OR

Us101 (hwy 9) over Siuslaw River

Carries Us101 (hwy 9) over Siuslaw River, 00.7 Mi S HWY 062 Jct.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,649 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

1,649 ft end to end: about 4.6 football fields. 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 bascule bridge (drawn closed).

Built1936rebuilt 1977
Length1649.3 ft502.7 m
Daily traffic10,905counted 2022
Last inspectedJuly 2023every 24 months

Location

StateOregon
CountyLane
Location00.7 Mi S HWY 062 Jct
CarriesUs101 (hwy 9)
CrossesSiuslaw River
Coordinates43.96469, -124.10863

Physical Characteristics

MaterialSteel
DesignMovable - Bascule
Total Length1649.3 ft (502.7 m)
Max Span153.9 ft (46.9 m)
Deck Width36.4 ft (11.1 m)
Deck Area5580.0 sq m
Main Spans1
Year Built1936 (reconstructed 1977)

Traffic

Avg Daily Traffic10,905 (2022)
Truck Traffic13%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical4 — Foundations need monitoring
Structure Number01821E009 19098

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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