US Bridges

I 380 SB over Elk Run Creek & RD

Fair

Black Hawk County, Iowa · 1.9 Mi. S of S JCT US 218 · Structure no. 000000000605265

Built
1983
42 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
345 ft
4 main spans
Daily traffic
16,600
2022 count
Owner
State
State Highway Agency

About this bridge

I 380 SB over Elk Run Creek & RD is a prestressed concrete stringer/multi-beam or girder carrying I 380 SB over Elk Run Creek & 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 16,600 vehicles a day, roughly 21% of them trucks, projected to reach 16,600 by 2043. The structure is 345 ft (105.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 380 SB
CrossesElk Run Creek & RD
Location1.9 Mi. S of S JCT US 218
RouteInterstate 380
StateIowa
Coordinates42.46034, -92.27943
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating81 US tons
Inventory rating48.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length345 ft (105.2 m)
Longest span92 ft (28 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,600 (2022)
Projected traffic16,600 by 2043
Trucks21%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I 380 SB over Elk Run Creek & RD built?

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

What condition is I 380 SB over Elk Run Creek & 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 September 2023.

How much traffic does I 380 SB over Elk Run Creek & RD carry?

About 16,600 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is I 380 SB over Elk Run Creek & RD?

The structure is 345 ft (105.2 m) long with a longest span of 92 ft (28 m) and a deck 43 ft wide.

Who owns I 380 SB over Elk Run Creek & RD?

It is owned by the State Highway Agency.