Structure 305155 · Shelby County, IA

Local over Indian Creek

Carries Local over Indian Creek, 079373504.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 2 of 9.

How ratings work
Deck4/9 · Poor
Superstructure5/9 · Fair
Substructuresets the rating2/9 · Critical
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT141 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 5/9Substructure 2/9 · sets the rating

141 ft end to end. 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 through truss.

Built1926100 years old
Length141.1 ft43 m
Daily traffic35counted 2022
Last inspectedApril 2023every 12 months

Location

StateIowa
CountyShelby
Location079373504
CarriesLocal
CrossesIndian Creek
Coordinates41.60552, -95.12147

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length141.1 ft (43 m)
Max Span90.9 ft (27.7 m)
Deck Width16.4 ft (5 m)
Deck Area215 sq m
Main Spans1
Year Built1926

Traffic

Avg Daily Traffic35 (2022)
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number000000000305155

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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