Structure 4900685 · Marion County, IN

Black Locust Drive over Obrian Ditch

Carries Black Locust Drive over Obrian Ditch, 00.10 S 38th Street.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT38 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 38 ft across. 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, so those are drawn as typical for a culvert.

Built199531 years old
Length37.7 ft11.5 m
Daily traffic598counted 2019
Last inspectedJuly 2024every 24 months

Location

StateIndiana
CountyMarion
Location00.10 S 38th Street
CarriesBlack Locust Drive
CrossesObrian Ditch
Coordinates39.82550, -85.96420

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length37.7 ft (11.5 m)
Max Span35.8 ft (10.9 m)
Deck Width73.8 ft (22.5 m)
Deck Area258.8 sq m
Main Spans1
Year Built1995

Traffic

Avg Daily Traffic598 (2019)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number4900685

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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