Structure 54 0201R · San Bernardino County, CA

Interstate 40 over Ardis Ditch

Carries Interstate 40 over Ardis Ditch, 08-sbd-040-r118.66.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT81 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

81 ft end to end, longest span 32 ft. Lengths and the car 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 slab bridge.

Built197155 years old
Length81.0 ft24.7 m
Daily traffic7,500counted 2019
Last inspectedMarch 2023every 24 months

Location

StateCalifornia
CountySan Bernardino
Location08-sbd-040-r118.66
CarriesInterstate 40
CrossesArdis Ditch
Coordinates34.83890, -114.99191

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length81.0 ft (24.7 m)
Max Span32.2 ft (9.8 m)
Deck Width41.0 ft (12.5 m)
Deck Area308.8 sq m
Main Spans3
Year Built1971

Traffic

Avg Daily Traffic7,500 (2019)
Truck Traffic42%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number54 0201R

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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