Structure 609160 · Polk County, IA

I 35 NB over Over Up Rr

Carries I 35 NB over Over Up Rr, 1.1 Miles N Of N Jct I-80.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT282 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

282 ft end to end, longest span 105 ft: about 4 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.

Built200224 years old
Length282.2 ft86 m
Daily traffic46,900counted 2023
Last inspectedMarch 2024every 24 months

Location

StateIowa
CountyPolk
Location1.1 Miles N Of N Jct I-80
CarriesI 35 NB
CrossesOver Up Rr
Coordinates41.66933, -93.57736

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length282.2 ft (86 m)
Max Span105.0 ft (32 m)
Deck Width86.6 ft (26.4 m)
Deck Area2270.4 sq m
Main Spans3
Year Built2002

Traffic

Avg Daily Traffic46,900 (2023)
Truck Traffic12%
Lanes On Bridge4

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000609160

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