US Bridges

I 380 SB over I 80

Good

Johnson County, Iowa · At Jct. of I-80 · Structure no. 000000000600361

Built
2023
2 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
374 ft
4 main spans
Daily traffic
—
2023 count
Owner
State
State Highway Agency

About this bridge

I 380 SB over I 80 is a prestressed concrete stringer/multi-beam or girder carrying I 380 SB over I 80 in Johnson County, Iowa. It was built in 2023, so it is 2 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

No traffic count is recorded. The structure is 374 ft (114.1 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 380 SB
CrossesI 80
LocationAt Jct. of I-80
RouteU.S. Route 218
StateIowa
Coordinates41.6947, -91.63862
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length374 ft (114.1 m)
Longest span112 ft (34.1 m)
Deck width67 ft (20.3 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 I 380 SB over I 80 built?

It was built in 2023, making it 2 years old in 2025.

What condition is I 380 SB over I 80 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2023.

How much traffic does I 380 SB over I 80 carry?

No traffic count is recorded for this structure.

How long is I 380 SB over I 80?

The structure is 374 ft (114.1 m) long with a longest span of 112 ft (34.1 m) and a deck 67 ft wide.

Who owns I 380 SB over I 80?

It is owned by the State Highway Agency.