US Bridges

N Division ST over I-80

Fair

Scott County, Iowa · 1.1 Mi. E of Iowa #130 · Structure no. 000000000047520

Built
1959
66 years old, rebuilt 2022
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
220 ft
4 main spans
Daily traffic
4,023
2022 count
Owner
State
State Highway Agency

About this bridge

N Division ST over I-80 is a prestressed concrete stringer/multi-beam or girder carrying N Division ST over I-80 in Scott County, Iowa. It was built in 1959 and reconstructed in 2022, so it is 66 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,023 vehicles a day, roughly 7% of them trucks, projected to reach 4,023 by 2044. The structure is 220 ft (67.1 m) long and 33 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesN Division ST
CrossesI-80
Location1.1 Mi. E of Iowa #130
RouteCity Street 0
CountyScott County
StateIowa
Coordinates41.59948, -90.59796
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating81.5 US tons
Inventory rating26.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length220 ft (67.1 m)
Longest span69 ft (21 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,023 (2022)
Projected traffic4,023 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N Division ST over I-80 built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2022.

What condition is N Division ST over I-80 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2024.

How much traffic does N Division ST over I-80 carry?

About 4,023 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is N Division ST over I-80?

The structure is 220 ft (67.1 m) long with a longest span of 69 ft (21 m) and a deck 33 ft wide.

Who owns N Division ST over I-80?

It is owned by the State Highway Agency.