US Bridges

I-380 over E and F Ave NW Cedar Rvr

Fair

Linn County, Iowa · 0.3 MI N. US 151(1st Ave) · Structure no. 000000000603700

Built
1979
46 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
685 ft
10 main spans
Daily traffic
57,600
2022 count
Owner
State
State Highway Agency

About this bridge

I-380 over E and F Ave NW Cedar Rvr is a prestressed concrete stringer/multi-beam or girder carrying I-380 over E and F Ave NW Cedar Rvr in Linn County, Iowa. It was built in 1979, so it is 46 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 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 57,600 vehicles a day, roughly 13% of them trucks, projected to reach 57,600 by 2043. The structure is 685 ft (208.8 m) long and 120 ft wide.

Location

Open in Google Maps
CarriesI-380
CrossesE and F Ave NW Cedar Rvr
Location0.3 MI N. US 151(1st Ave)
RouteInterstate 380
CountyLinn County
StateIowa
Coordinates41.97839, -91.67381
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.3 US tons
Inventory rating30.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length685 ft (208.8 m)
Longest span68 ft (20.7 m)
Deck width120 ft (36.5 m)
Roadway width112 ft (34 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57,600 (2022)
Projected traffic57,600 by 2043
Trucks13%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed—
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 over E and F Ave NW Cedar Rvr built?

It was built in 1979, making it 46 years old in 2025.

What condition is I-380 over E and F Ave NW Cedar Rvr 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 June 2023.

How much traffic does I-380 over E and F Ave NW Cedar Rvr carry?

About 57,600 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is I-380 over E and F Ave NW Cedar Rvr?

The structure is 685 ft (208.8 m) long with a longest span of 68 ft (20.7 m) and a deck 120 ft wide.

Who owns I-380 over E and F Ave NW Cedar Rvr?

It is owned by the State Highway Agency.