Structure 2200050 · Floyd County, IN

Blackiston Mill RD over Silver Creek

Carries Blackiston Mill RD over Silver Creek, 00.20 E Payne Koehler.

Overall conditionPoor

Set by its lowest-rated component: Deck at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructure6/9 · Satisfactory
Substructure4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT176 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 6/9Substructure 4/9

176 ft end to end, longest span 88 ft: about 2 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.

Built1920rebuilt 1966
Length175.9 ft53.6 m
Daily traffic14,500counted 2016
Last inspectedMarch 2024every 12 months

Location

StateIndiana
CountyFloyd
Location00.20 E Payne Koehler
CarriesBlackiston Mill RD
CrossesSilver Creek
Coordinates38.33429, -85.79487

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length175.9 ft (53.6 m)
Max Span87.6 ft (26.7 m)
Deck Width24.0 ft (7.3 m)
Deck Area391.3 sq m
Main Spans2
Year Built1920 (reconstructed 1966)

Traffic

Avg Daily Traffic14,500 (2016)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number2200050

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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