Structure 17151 · Carroll County, IA

US 71 over Fork Of Brushy Creek

Carries US 71 over Fork Of Brushy Creek, 2.7 Mi. N Of E Jct. #141.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT204 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 7/9 · sets the rating

204 ft end to end, longest span 69 ft: about 3 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.

Built199432 years old
Length204.1 ft62.2 m
Daily traffic2,830counted 2022
Last inspectedDecember 2023every 24 months

Location

StateIowa
CountyCarroll
Location2.7 Mi. N Of E Jct. #141
CarriesUS 71
CrossesFork Of Brushy Creek
Coordinates41.94560, -94.87949

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length204.1 ft (62.2 m)
Max Span68.9 ft (21 m)
Deck Width46.9 ft (14.3 m)
Deck Area889.5 sq m
Main Spans3
Year Built1994

Traffic

Avg Daily Traffic2,830 (2022)
Truck Traffic16%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000017151

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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