Structure 50768 · Marion County, IN

Ramp I74eb-i465nb over I-465 Nb/sb Ramps

Carries Ramp I74eb-i465nb over I-465 Nb/sb Ramps, 02.75 N US 36.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT808 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 8/9 · sets the rating

808 ft end to end, longest span 175 ft: about 2.2 football fields. 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.

Built201214 years old
Length808.1 ft246.3 m
Daily traffic8,115counted 2021
Last inspectedJune 2024every 24 months

Location

StateIndiana
CountyMarion
Location02.75 N US 36
CarriesRamp I74eb-i465nb
CrossesI-465 Nb/sb Ramps
Coordinates39.80385, -86.27531

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length808.1 ft (246.3 m)
Max Span174.9 ft (53.3 m)
Deck Width35.1 ft (10.7 m)
Deck Area2635.4 sq m
Main Spans5
Year Built2012

Traffic

Avg Daily Traffic8,115 (2021)
Truck Traffic17%
Lanes On Bridge1
Lanes Under Bridge16

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number050768

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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