US Bridges

Ia # 78 over Stream

Fair

Henry County, Iowa · 2.0 Mi. W of W JCT W-66 · Structure no. 000000000028570

Built
1916
109 years old, rebuilt 1959
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
1,110
2022 count
Owner
State
State Highway Agency

About this bridge

Ia # 78 over Stream is a concrete slab carrying Ia # 78 over Stream in Henry County, Iowa. It was built in 1916 and reconstructed in 1959, so it is 109 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 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 1,110 vehicles a day, roughly 8% of them trucks, projected to reach 1,110 by 2043. The structure is 24 ft (7.3 m) long and 34 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesIa # 78
CrossesStream
Location2.0 Mi. W of W JCT W-66
RouteState Highway 78
CountyHenry County
StateIowa
Coordinates41.11902, -91.47563
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.9 US tons
Inventory rating30.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,110 (2022)
Projected traffic1,110 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 1916, making it 109 years old in 2025. It was reconstructed in 1959.

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 1,110 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is Ia # 78 over Stream?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 34 ft wide.

Who owns Ia # 78 over Stream?

It is owned by the State Highway Agency.