US Bridges

NB US 151 over US 30 (e.Jct)

Fair

Linn County, Iowa · At N Jct. U.S. 30 · Structure no. 000000000033610

Built
1965
60 years old, rebuilt 1991
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
239 ft
4 main spans
Daily traffic
3,600
2022 count
Owner
State
State Highway Agency

About this bridge

NB US 151 over US 30 (e.Jct) is a steel continuous stringer/multi-beam or girder carrying NB US 151 over US 30 (e.Jct) in Linn County, Iowa. It was built in 1965 and reconstructed in 1991, so it is 60 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 5 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 3,600 vehicles a day, roughly 15% of them trucks, projected to reach 3,600 by 2042. The structure is 239 ft (72.8 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNB US 151
CrossesUS 30 (e.Jct)
LocationAt N Jct. U.S. 30
RouteU.S. Route 151
CountyLinn County
StateIowa
Coordinates41.92603, -91.54168
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating56.7 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length239 ft (72.8 m)
Longest span66 ft (20.1 m)
Deck width27 ft (8.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,600 (2022)
Projected traffic3,600 by 2042
Trucks15%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 NB US 151 over US 30 (e.Jct) built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1991.

What condition is NB US 151 over US 30 (e.Jct) 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 September 2024.

How much traffic does NB US 151 over US 30 (e.Jct) carry?

About 3,600 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is NB US 151 over US 30 (e.Jct)?

The structure is 239 ft (72.8 m) long with a longest span of 66 ft (20.1 m) and a deck 27 ft wide.

Who owns NB US 151 over US 30 (e.Jct)?

It is owned by the State Highway Agency.