Structure 49 0152R · San Luis Obispo County, CA

US Highway 101 NB over Traffic Way

Carries US Highway 101 NB over Traffic Way, 05-slo-101-45.96-atas.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT131 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 7/9

131 ft end to end. 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.

Built1956rebuilt 2012
Length131.2 ft40 m
Daily traffic30,000counted 2009
Last inspectedMay 2023every 24 months

Location

StateCalifornia
CountySan Luis Obispo
Location05-slo-101-45.96-atas
CarriesUS Highway 101 NB
CrossesTraffic Way
Coordinates35.48858, -120.67062

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length131.2 ft (40 m)
Max Span62.0 ft (18.9 m)
Deck Width41.0 ft (12.5 m)
Deck Area500 sq m
Main Spans1
Year Built1956 (reconstructed 2012)

Traffic

Avg Daily Traffic30,000 (2009)
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number49 0152R

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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