Structure 49 0014L · San Luis Obispo County, CA

US Highway 101 SB over San Luis Obispo Creek

Carries US Highway 101 SB over San Luis Obispo Creek, 05-slo-101-r21.49.

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
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT570 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

570 ft end to end, longest span 45 ft: about 1.6 football fields. 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.

Built1948rebuilt 2002
Length569.9 ft173.7 m
Daily traffic31,000counted 2009
Last inspectedJuly 2024every 24 months

Location

StateCalifornia
CountySan Luis Obispo
Location05-slo-101-r21.49
CarriesUS Highway 101 SB
CrossesSan Luis Obispo Creek
Coordinates35.18471, -120.70146

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length569.9 ft (173.7 m)
Max Span44.9 ft (13.7 m)
Deck Width42.0 ft (12.8 m)
Deck Area2223.4 sq m
Main Spans16
Year Built1948 (reconstructed 2002)

Traffic

Avg Daily Traffic31,000 (2009)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number49 0014L

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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