US Bridges

Local RD over I-380

Good

Johnson County, Iowa · 5.6 Mi. N of Jct. I-80 · Structure no. 000000000600450

Built
1971
54 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
250 ft
4 main spans
Daily traffic
131
2022 count
Owner
State
State Highway Agency

About this bridge

Local RD over I-380 is a prestressed concrete stringer/multi-beam or girder carrying Local RD over I-380 in Johnson County, Iowa. It was built in 1971, so it is 54 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 131 vehicles a day, projected to reach 131 by 2042. The structure is 250 ft (76.2 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesLocal RD
CrossesI-380
Location5.6 Mi. N of Jct. I-80
RouteCounty Highway 0
StateIowa
Coordinates41.775, -91.64705
Functional classRural Local

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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating78.8 US tons
Inventory rating30.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length250 ft (76.2 m)
Longest span87 ft (26.5 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic131 (2022)
Projected traffic131 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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 Local RD over I-380 built?

It was built in 1971, making it 54 years old in 2025.

What condition is Local RD 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 June 2024.

How much traffic does Local RD over I-380 carry?

About 131 vehicles per day (2022 count).

How long is Local RD over I-380?

The structure is 250 ft (76.2 m) long with a longest span of 87 ft (26.5 m) and a deck 33 ft wide.

Who owns Local RD over I-380?

It is owned by the State Highway Agency.