Structure 116790 · Clay County, IA

210th AVE over Little Sioux River

Carries 210th AVE over Little Sioux River, 096370102.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 0 of 9.

How ratings work
Deck4/9 · Poor
Superstructuresets the rating0/9 · Failed
Substructure4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT180 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 0/9 · sets the ratingSubstructure 4/9

180 ft end to end: 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 through truss.

Built1915111 years old
Length180.1 ft54.9 m
Daily traffic62counted 2022
Last inspectedApril 2023every 24 months

Location

StateIowa
CountyClay
Location096370102
Carries210th AVE
CrossesLittle Sioux River
Coordinates43.16267, -95.17030

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length180.1 ft (54.9 m)
Max Span177.2 ft (54 m)
Deck Width18.0 ft (5.5 m)
Deck Area301.9 sq m
Main Spans1
Year Built1915

Traffic

Avg Daily Traffic62 (2022)
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour CriticalUnknown
Structure Number000000000116790

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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