Structure 57 0674L · San Diego County, CA

State Route 163 SB over I-805 & S163-s805

Carries State Route 163 SB over I-805 & S163-s805, 11-sd-163-6.96-sd.

Overall conditionFair

Set by its lowest-rated component: Deck at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT594 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

594 ft end to end, longest span 170 ft: about 1.7 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 box-beam bridge.

Built197254 years old
Length594.2 ft181.1 m
Daily traffic74,000counted 2016
Last inspectedJanuary 2025every 24 months

Location

StateCalifornia
CountySan Diego
Location11-sd-163-6.96-sd
CarriesState Route 163 SB
CrossesI-805 & S163-s805
Coordinates32.80774, -117.15325

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length594.2 ft (181.1 m)
Max Span169.9 ft (51.8 m)
Deck Width67.9 ft (20.7 m)
Deck Area3748.8 sq m
Main Spans2
Year Built1972

Traffic

Avg Daily Traffic74,000 (2016)
Truck Traffic4%
Lanes On Bridge4
Lanes Under Bridge10

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number57 0674L

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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