Structure 4900436 · Marion County, IN

Derbyshire RD over Little Buck Creek

Carries Derbyshire RD over Little Buck Creek, 00.15 NE Of Southport RD.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT103 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

103 ft end to end, longest span 34 ft. 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 or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built196066 years old
Length102.7 ft31.3 m
Daily traffic1,500counted 2019
Last inspectedJuly 2024every 24 months

Location

StateIndiana
CountyMarion
Location00.15 NE Of Southport RD
CarriesDerbyshire RD
CrossesLittle Buck Creek
Coordinates39.66686, -86.12151

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length102.7 ft (31.3 m)
Max Span33.8 ft (10.3 m)
Deck Width34.4 ft (10.5 m)
Deck Area328.6 sq m
Main Spans3
Year Built1960

Traffic

Avg Daily Traffic1,500 (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 Number4900436

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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