US Bridges

SB I-380 over City Streets UP &ccp RR

Fair

Linn County, Iowa · 0.6 Mi. N of Jct. Ia 922 · Structure no. 000000000603692

Built
1979
46 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,470 ft
20 main spans
Daily traffic
34,350
2022 count
Owner
State
State Highway Agency

About this bridge

SB I-380 over City Streets UP &ccp RR is a steel continuous stringer/multi-beam or girder carrying SB I-380 over City Streets UP &ccp RR 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 34,350 vehicles a day, roughly 11% of them trucks, projected to reach 34,350 by 2042. The structure is 1,470 ft (448.1 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSB I-380
CrossesCity Streets UP &ccp RR
Location0.6 Mi. N of Jct. Ia 922
RouteInterstate 380
CountyLinn County
StateIowa
Coordinates41.98165, -91.66731
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
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 alignment8: Equal to present desirable criteria
Operating rating51.1 US tons
Inventory rating30.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans20
Design loadHS 20
Structure length1,470 ft (448.1 m)
Longest span99 ft (30.2 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,350 (2022)
Projected traffic34,350 by 2042
Trucks11%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SB I-380 over City Streets UP &ccp RR built?

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

What condition is SB I-380 over City Streets UP &ccp RR 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 October 2024.

How much traffic does SB I-380 over City Streets UP &ccp RR carry?

About 34,350 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is SB I-380 over City Streets UP &ccp RR?

The structure is 1,470 ft (448.1 m) long with a longest span of 99 ft (30.2 m) and a deck 55 ft wide.

Who owns SB I-380 over City Streets UP &ccp RR?

It is owned by the State Highway Agency.