Structure 54 0238R · San Bernardino County, CA

Interstate 15 NB over Bird Ditch

Carries Interstate 15 NB over Bird Ditch, 08-sbd-015-r115.36.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT40 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

40 ft end to end, longest span 20 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 channel-beam bridge.

Built196462 years old
Length40.0 ft12.2 m
Daily traffic22,000counted 2019
Last inspectedOctober 2023every 24 months

Location

StateCalifornia
CountySan Bernardino
Location08-sbd-015-r115.36
CarriesInterstate 15 NB
CrossesBird Ditch
Coordinates35.08635, -116.35091

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length40.0 ft (12.2 m)
Max Span20.0 ft (6.1 m)
Deck Width41.7 ft (12.7 m)
Deck Area154.9 sq m
Main Spans2
Year Built1964

Traffic

Avg Daily Traffic22,000 (2019)
Truck Traffic20%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number54 0238R

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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