US Bridges

I 380 SB over Clear Creek

Good

Johnson County, Iowa · I-80 / I-380 Interchange · Structure no. 000000000600381

Built
2022
3 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
327 ft
3 main spans
Daily traffic
18,000
2022 count
Owner
State
State Highway Agency

About this bridge

I 380 SB over Clear Creek is a prestressed concrete stringer/multi-beam or girder carrying I 380 SB over Clear Creek in Johnson County, Iowa. It was built in 2022, so it is 3 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.

It carries about 18,000 vehicles a day, roughly 18% of them trucks, projected to reach 18,000 by 2042. The structure is 327 ft (99.6 m) long and 67 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 380 SB
CrossesClear Creek
LocationI-80 / I-380 Interchange
RouteInterstate 380
StateIowa
Coordinates41.7011, -91.64196
Functional classUrban Principal Arterial - Interstate

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
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 spans3
Design loadHL 93
Structure length327 ft (99.6 m)
Longest span112 ft (34.1 m)
Deck width67 ft (20.4 m)
Roadway width63 ft (19.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2022)
Projected traffic18,000 by 2042
Trucks18%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 380 SB over Clear Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is I 380 SB over Clear Creek 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 June 2024.

How much traffic does I 380 SB over Clear Creek carry?

About 18,000 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is I 380 SB over Clear Creek?

The structure is 327 ft (99.6 m) long with a longest span of 112 ft (34.1 m) and a deck 67 ft wide.

Who owns I 380 SB over Clear Creek?

It is owned by the State Highway Agency.