Structure 2275 033F00817 · Lincoln County, OR

Old US 20- HWY 033 over W Olalla Slough

Carries Old US 20- HWY 033 over W Olalla Slough, 0243 M Jct HWY 181.

Overall conditionPoor

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT69 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 4/9 · sets the rating

69 ft end to end, longest span 23 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 multi-beam bridge.

Built193690 years old
Length68.9 ft21 m
Daily traffic6,800counted 2020
Last inspectedSeptember 2024every 24 months

Location

StateOregon
CountyLincoln
Location0243 M Jct HWY 181
CarriesOld US 20- HWY 033
CrossesW Olalla Slough
Coordinates44.63471, -123.92586

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length68.9 ft (21 m)
Max Span23.0 ft (7 m)
Deck Width34.8 ft (10.6 m)
Deck Area222.6 sq m
Main Spans3
Year Built1936

Traffic

Avg Daily Traffic6,800 (2020)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number02275 033F00817

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.

Nearby Bridges