Structure 58C0082 · Imperial County, CA

Harris Road over Alamo River

Carries Harris Road over Alamo River, 1.8 Mi E/o Mcconnell RD.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT145 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

145 ft end to end, longest span 29 ft: about 2 semi-trucks nose to tail. 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 slab bridge.

Built197056 years old
Length145.0 ft44.2 m
Daily traffic320counted 2020
Last inspectedJanuary 2024every 24 months

Location

StateCalifornia
CountyImperial
Location1.8 Mi E/o Mcconnell RD
CarriesHarris Road
CrossesAlamo River
Coordinates32.88296, -115.45253

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length145.0 ft (44.2 m)
Max Span28.9 ft (8.8 m)
Deck Width32.5 ft (9.9 m)
Deck Area437.6 sq m
Main Spans5
Year Built1970

Traffic

Avg Daily Traffic320 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number58C0082

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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