US Bridges

I 380 NB over Ianr RR & Texas ST

Fair

Black Hawk County, Iowa · 0.3 Mi. S. of Jct. US 218 · Structure no. 000000000605345

Built
1983
42 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
399 ft
5 main spans
Daily traffic
8,800
2022 count
Owner
State
State Highway Agency

About this bridge

I 380 NB over Ianr RR & Texas ST is a steel continuous stringer/multi-beam or girder carrying I 380 NB over Ianr RR & Texas ST in Black Hawk County, Iowa. It was built in 1983, so it is 42 years old, younger 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 8,800 vehicles a day, roughly 17% of them trucks, projected to reach 8,800 by 2042. The structure is 399 ft (121.6 m) long and 43 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI 380 NB
CrossesIanr RR & Texas ST
Location0.3 Mi. S. of Jct. US 218
RouteInterstate 380
CountyBlack Hawk County
StateIowa
Coordinates42.45574, -92.30813
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating88.5 US tons
Inventory rating53.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length399 ft (121.6 m)
Longest span51 ft (15.5 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,800 (2022)
Projected traffic8,800 by 2042
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 380 NB over Ianr RR & Texas ST built?

It was built in 1983, making it 42 years old in 2025.

What condition is I 380 NB over Ianr RR & Texas ST 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 May 2023.

How much traffic does I 380 NB over Ianr RR & Texas ST carry?

About 8,800 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is I 380 NB over Ianr RR & Texas ST?

The structure is 399 ft (121.6 m) long with a longest span of 51 ft (15.5 m) and a deck 43 ft wide.

Who owns I 380 NB over Ianr RR & Texas ST?

It is owned by the State Highway Agency.