US Bridges

Ia 78 over Stream

Fair

Henry County, Iowa · 0.3 Mi. W of E Jct. W66 · Structure no. 000000000028590

Built
1932
93 years old, rebuilt 1952
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
37 ft
1 main span
Daily traffic
780
2021 count
Owner
State
State Highway Agency

About this bridge

Ia 78 over Stream is a steel stringer/multi-beam or girder carrying Ia 78 over Stream in Henry County, Iowa. It was built in 1932 and reconstructed in 1952, so it is 93 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 5 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 780 vehicles a day, roughly 10% of them trucks, projected to reach 780 by 2043. The structure is 37 ft (11.3 m) long and 36 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesIa 78
CrossesStream
Location0.3 Mi. W of E Jct. W66
RouteState Highway 78
CountyHenry County
StateIowa
Coordinates41.09604, -91.43799
Functional classRural Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating43.3 US tons
Inventory rating26 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length37 ft (11.3 m)
Longest span36 ft (11 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic780 (2021)
Projected traffic780 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 78 over Stream built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1952.

What condition is Ia 78 over Stream 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 April 2023.

How much traffic does Ia 78 over Stream carry?

About 780 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Ia 78 over Stream?

The structure is 37 ft (11.3 m) long with a longest span of 36 ft (11 m) and a deck 36 ft wide.

Who owns Ia 78 over Stream?

It is owned by the State Highway Agency.