Structure 11128 020300060 · Clatsop County, OR

Brownsmead Dike RD over Blind Slough

Carries Brownsmead Dike RD over Blind Slough, 022 Mi N HWY 30.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT211 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

211 ft end to end, longest span 30 ft: about 3 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 tee-beam bridge.

Built195967 years old
Length211.0 ft64.3 m
Daily traffic338counted 2020
Last inspectedApril 2023every 24 months

Location

StateOregon
CountyClatsop
Location022 Mi N HWY 30
CarriesBrownsmead Dike RD
CrossesBlind Slough
Coordinates46.20651, -123.52528

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length211.0 ft (64.3 m)
Max Span29.9 ft (9.1 m)
Deck Width26.9 ft (8.2 m)
Deck Area527.3 sq m
Main Spans7
Year Built1959

Traffic

Avg Daily Traffic338 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour CriticalUnknown
Structure Number11128 020300060

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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