Structure 200338 · Allen County, IN

Bluffton RD over Harber Drain

Carries Bluffton RD over Harber Drain, 00.20 N Ferguson RD.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT64 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

64 ft end to end. 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.

Built1977rebuilt 1991
Length64.0 ft19.5 m
Daily traffic14,075counted 2022
Last inspectedMay 2024every 24 months

Location

StateIndiana
CountyAllen
Location00.20 N Ferguson RD
CarriesBluffton RD
CrossesHarber Drain
Coordinates40.99217, -85.16851

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length64.0 ft (19.5 m)
Max Span60.7 ft (18.5 m)
Deck Width38.7 ft (11.8 m)
Deck Area230.1 sq m
Main Spans1
Year Built1977 (reconstructed 1991)

Traffic

Avg Daily Traffic14,075 (2022)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number0200338

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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