US Bridges

SR 54th ST Trl over I-380

Fair

Benton County, Iowa · 1.6 Mi. S of Iowa 150 · Structure no. 000000000605125

Built
1981
44 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
302 ft
4 main spans
Daily traffic
2,231
2023 count
Owner
State
State Highway Agency

About this bridge

SR 54th ST Trl over I-380 is a prestressed concrete stringer/multi-beam or girder carrying SR 54th ST Trl over I-380 in Benton County, Iowa. It was built in 1981, so it is 44 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 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 2,231 vehicles a day, roughly 8% of them trucks, projected to reach 2,231 by 2044. The structure is 302 ft (92.1 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesSR 54th ST Trl
CrossesI-380
Location1.6 Mi. S of Iowa 150
RouteCounty Highway 0
CountyBenton County
StateIowa
Coordinates42.22851, -91.86761
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99.5 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length302 ft (92.1 m)
Longest span97 ft (29.6 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,231 (2023)
Projected traffic2,231 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 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 SR 54th ST Trl over I-380 built?

It was built in 1981, making it 44 years old in 2025.

What condition is SR 54th ST Trl over I-380 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 November 2024.

How much traffic does SR 54th ST Trl over I-380 carry?

About 2,231 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 54th ST Trl over I-380?

The structure is 302 ft (92.1 m) long with a longest span of 97 ft (29.6 m) and a deck 47 ft wide.

Who owns SR 54th ST Trl over I-380?

It is owned by the State Highway Agency.