US Bridges

I 380 Ramp over Ramp F over I-380

Good

Linn County, Iowa · 0.2 Mi. N of Jct. 30 · Structure no. 000000000600560

Built
1975
50 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
372 ft
4 main spans
Daily traffic
7,600
2022 count
Owner
State
State Highway Agency

About this bridge

I 380 Ramp over Ramp F over I-380 is a steel continuous stringer/multi-beam or girder carrying I 380 Ramp over Ramp F over I-380 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,600 vehicles a day, roughly 9% of them trucks, projected to reach 7,600 by 2044. The structure is 372 ft (113.4 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 380 Ramp
CrossesRamp F over I-380
Location0.2 Mi. N of Jct. 30
RouteInterstate 380
StateIowa
Coordinates41.93006, -91.67009
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71.4 US tons
Inventory rating42.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length372 ft (113.4 m)
Longest span124 ft (37.8 m)
Deck width30 ft (9 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,600 (2022)
Projected traffic7,600 by 2044
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Ramp over Ramp F over I-380 built?

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

What condition is I 380 Ramp over Ramp F over I-380 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 December 2024.

How much traffic does I 380 Ramp over Ramp F over I-380 carry?

About 7,600 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is I 380 Ramp over Ramp F over I-380?

The structure is 372 ft (113.4 m) long with a longest span of 124 ft (37.8 m) and a deck 30 ft wide.

Who owns I 380 Ramp over Ramp F over I-380?

It is owned by the State Highway Agency.