Structure 10506 · Montgomery County, AL

Herron ST over I65

Carries Herron ST over I65, 0.2 Mi.s.of Bell ST.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT266 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 6/9Substructure 6/9

266 ft end to end, longest span 70 ft: about 4 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 multi-beam bridge.

Built197155 years old
Length266.1 ft81.1 m
Daily traffic8,664counted 2003
Last inspectedMarch 2023every 24 months

Location

StateAlabama
CountyMontgomery
Location0.2 Mi.s.of Bell ST
CarriesHerron ST
CrossesI65
Coordinates32.37540, -86.32144

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length266.1 ft (81.1 m)
Max Span69.9 ft (21.3 m)
Deck Width49.9 ft (15.2 m)
Deck Area1232.7 sq m
Main Spans4
Year Built1971

Traffic

Avg Daily Traffic8,664 (2003)
Truck Traffic1%
Lanes On Bridge3
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number010506

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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