US Bridges

I380 S to US 20 W over Hess RD

Fair

Black Hawk County, Iowa · 0.3 Mi. W of W Jct. I-380 · Structure no. 000000000605330

Built
1983
42 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
191 ft
3 main spans
Daily traffic
1,140
2022 count
Owner
State
State Highway Agency

About this bridge

I380 S to US 20 W over Hess RD is a prestressed concrete stringer/multi-beam or girder carrying I380 S to US 20 W over Hess RD in Black Hawk County, Iowa. It was built in 1983, so it is 42 years old, younger 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 1,140 vehicles a day, roughly 12% of them trucks, projected to reach 1,140 by 2043. The structure is 191 ft (58.2 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI380 S to US 20 W
CrossesHess RD
Location0.3 Mi. W of W Jct. I-380
RouteInterstate 380
CountyBlack Hawk County
StateIowa
Coordinates42.45389, -92.31704
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.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length191 ft (58.2 m)
Longest span96 ft (29.3 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,140 (2022)
Projected traffic1,140 by 2043
Trucks12%
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 I380 S to US 20 W over Hess RD built?

It was built in 1983, making it 42 years old in 2025.

What condition is I380 S to US 20 W over Hess RD 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 February 2023.

How much traffic does I380 S to US 20 W over Hess RD carry?

About 1,140 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is I380 S to US 20 W over Hess RD?

The structure is 191 ft (58.2 m) long with a longest span of 96 ft (29.3 m) and a deck 30 ft wide.

Who owns I380 S to US 20 W over Hess RD?

It is owned by the State Highway Agency.