US Bridges

I 380 SB over Cic RR & 8th Ave

Fair

Linn County, Iowa · 0.8 Mi. S of Jct. Ia #922 · Structure no. 000000000607090

Built
1975
50 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
638 ft
10 main spans
Daily traffic
26,000
2022 count
Owner
State
State Highway Agency

About this bridge

I 380 SB over Cic RR & 8th Ave is a steel continuous stringer/multi-beam or girder carrying I 380 SB over Cic RR & 8th Ave in Linn County, Iowa. It was built in 1975, so it is 50 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 26,000 vehicles a day, roughly 14% of them trucks, projected to reach 26,000 by 2043. The structure is 638 ft (194.5 m) long and 66 ft wide.

Location

Open in Google Maps
CarriesI 380 SB
CrossesCic RR & 8th Ave
Location0.8 Mi. S of Jct. Ia #922
RouteInterstate 380
CountyLinn County
StateIowa
Coordinates41.96896, -91.6723
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.8 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length638 ft (194.5 m)
Longest span85 ft (25.9 m)
Deck width66 ft (20.1 m)
Roadway width63 ft (19.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,000 (2022)
Projected traffic26,000 by 2043
Trucks14%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 380 SB over Cic RR & 8th Ave built?

It was built in 1975, making it 50 years old in 2025.

What condition is I 380 SB over Cic RR & 8th Ave 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 SB over Cic RR & 8th Ave carry?

About 26,000 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is I 380 SB over Cic RR & 8th Ave?

The structure is 638 ft (194.5 m) long with a longest span of 85 ft (25.9 m) and a deck 66 ft wide.

Who owns I 380 SB over Cic RR & 8th Ave?

It is owned by the State Highway Agency.