Structure 2349 009 04923 · Tillamook County, OR

Us101 (hwy 9) over Lake Lytle Outlet

Carries Us101 (hwy 9) over Lake Lytle Outlet, 007 Mi N Rockaway.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT153 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

153 ft end to end, longest span 27 ft: about 2 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.

Built193888 years old
Length152.9 ft46.6 m
Daily traffic6,303counted 2022
Last inspectedMarch 2023every 24 months

Location

StateOregon
CountyTillamook
Location007 Mi N Rockaway
CarriesUs101 (hwy 9)
CrossesLake Lytle Outlet
Coordinates45.63546, -123.94077

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length152.9 ft (46.6 m)
Max Span26.9 ft (8.2 m)
Deck Width35.4 ft (10.8 m)
Deck Area503.3 sq m
Main Spans7
Year Built1938

Traffic

Avg Daily Traffic6,303 (2022)
Truck Traffic4%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number02349 009 04923

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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