Structure 49 0247 · San Luis Obispo County, CA

US Highway 101 over ST RTE 41 (@pm15.96)

Carries US Highway 101 over ST RTE 41 (@pm15.96), 05-slo-101-45.56-atas.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT165 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

165 ft end to end, longest span 82 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 box-beam bridge.

Built201016 years old
Length164.7 ft50.2 m
Daily traffic53,000counted 2009
Last inspectedMay 2023every 24 months

Location

StateCalifornia
CountySan Luis Obispo
Location05-slo-101-45.56-atas
CarriesUS Highway 101
CrossesST RTE 41 (@pm15.96)
Coordinates35.48534, -120.66482

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length164.7 ft (50.2 m)
Max Span82.3 ft (25.1 m)
Deck Width135.5 ft (41.3 m)
Deck Area2073.3 sq m
Main Spans2
Year Built2010

Traffic

Avg Daily Traffic53,000 (2009)
Truck Traffic8%
Lanes On Bridge6
Lanes Under Bridge3

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 0247

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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