Structure 54 0779R · San Bernardino County, CA

Interstate 15 NB over Glen Helen Parkway

Carries Interstate 15 NB over Glen Helen Parkway, 08-sbd-015-14.77.

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 FT142 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

142 ft end to end, longest span 78 ft. 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.

Built1969rebuilt 2016
Length142.1 ft43.3 m
Daily traffic69,500counted 2022
Last inspectedJanuary 2025every 24 months

Location

StateCalifornia
CountySan Bernardino
Location08-sbd-015-14.77
CarriesInterstate 15 NB
CrossesGlen Helen Parkway
Coordinates34.20248, -117.41528

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length142.1 ft (43.3 m)
Max Span78.1 ft (23.8 m)
Deck Width70.9 ft (21.6 m)
Deck Area935.3 sq m
Main Spans3
Year Built1969 (reconstructed 2016)

Traffic

Avg Daily Traffic69,500 (2022)
Truck Traffic11%
Lanes On Bridge4
Lanes Under Bridge5

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 Number54 0779R

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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