Structure 54530 · Wright County, IA

330th ST over Eagle Creek

Carries 330th ST over Eagle Creek, 090253101.

Overall conditionPoor

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

How ratings work
Deck4/9 · Poor
Superstructuresets the rating3/9 · Serious
Substructure4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT152 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 3/9 · sets the ratingSubstructure 4/9

152 ft end to end, longest span 58 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.

Built1951rebuilt 1992
Length151.9 ft46.3 m
Daily traffic966counted 2022
Last inspectedMarch 2024every 24 months

Location

StateIowa
CountyWright
Location090253101
Carries330th ST
CrossesEagle Creek
Coordinates42.57204, -93.85275

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length151.9 ft (46.3 m)
Max Span58.1 ft (17.7 m)
Deck Width29.2 ft (8.9 m)
Deck Area412.1 sq m
Main Spans3
Year Built1951 (reconstructed 1992)

Traffic

Avg Daily Traffic966 (2022)
Truck Traffic22%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000054530

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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