Structure 38181 · Muscatine County, IA

Ia 70 over Goshen Ditch

Carries Ia 70 over Goshen Ditch, 0.5 Mi. N Of Jct. SR F70.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructure8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT90 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 7/9 · sets the ratingSubstructure 8/9

90 ft end to end, longest span 35 ft. Lengths and the car 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 slab bridge.

Built200719 years old
Length89.9 ft27.4 m
Daily traffic2,660counted 2022
Last inspectedSeptember 2023every 24 months

Location

StateIowa
CountyMuscatine
Location0.5 Mi. N Of Jct. SR F70
CarriesIa 70
CrossesGoshen Ditch
Coordinates41.53211, -91.25180

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length89.9 ft (27.4 m)
Max Span35.1 ft (10.7 m)
Deck Width47.2 ft (14.4 m)
Deck Area394.6 sq m
Main Spans3
Year Built2007

Traffic

Avg Daily Traffic2,660 (2022)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000000038181

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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