US Bridges

Ia 60 NB over Stream

Fair

Plymouth County, Iowa · 0.7 Mi. S of SR C12 · Structure no. 000000000040050

Built
1932
93 years old, rebuilt 1967
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
27 ft
1 main span
Daily traffic
3,200
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 60 NB over Stream is a steel stringer/multi-beam or girder carrying Ia 60 NB over Stream in Plymouth County, Iowa. It was built in 1932 and reconstructed in 1967, 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 3,200 vehicles a day, roughly 22% of them trucks, projected to reach 3,200 by 2043. The structure is 27 ft (8.2 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIa 60 NB
CrossesStream
Location0.7 Mi. S of SR C12
RouteState Highway 60
CountyPlymouth County
StateIowa
Coordinates42.88625, -96.09563
Functional classRural Principal Arterial - Other

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 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 geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span24 ft (7.3 m)
Deck width47 ft (14.2 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,200 (2022)
Projected traffic3,200 by 2043
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 60 NB over Stream built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1967.

What condition is Ia 60 NB 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 July 2023.

How much traffic does Ia 60 NB over Stream carry?

About 3,200 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Ia 60 NB over Stream?

The structure is 27 ft (8.2 m) long with a longest span of 24 ft (7.3 m) and a deck 47 ft wide.

Who owns Ia 60 NB over Stream?

It is owned by the State Highway Agency.