Structure 28471 · Henry County, IA

US 218 Ia 27 NB over Skunk River

Carries US 218 Ia 27 NB over Skunk River, 4.7 Mi. S Of S Jct US 218.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT624 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

624 ft end to end, longest span 127 ft: about 1.7 football fields. 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.

Built20197 years old
Length624.0 ft190.2 m
Daily traffic4,850counted 2022
Last inspectedAugust 2023every 24 months

Location

StateIowa
CountyHenry
Location4.7 Mi. S Of S Jct US 218
CarriesUS 218 Ia 27 NB
CrossesSkunk River
Coordinates40.89683, -91.55501

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length624.0 ft (190.2 m)
Max Span127.0 ft (38.7 m)
Deck Width43.3 ft (13.2 m)
Deck Area2510.6 sq m
Main Spans5
Year Built2019

Traffic

Avg Daily Traffic4,850 (2022)
Truck Traffic28%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000028471

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.

Nearby Bridges