US Bridges

Ia 141 over West Nishnabotna River

Fair

Carroll County, Iowa · In Manning · Structure no. 000000000017250

Built
1962
63 years old
Condition
Fair
inspected February 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
3,550
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 141 over West Nishnabotna River is a concrete continuous slab carrying Ia 141 over West Nishnabotna River in Carroll County, Iowa. It was built in 1962, so it is 63 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 3,550 vehicles a day, roughly 10% of them trucks, projected to reach 3,550 by 2043. The structure is 93 ft (28.3 m) long and 56 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesIa 141
CrossesWest Nishnabotna River
LocationIn Manning
RouteState Highway 141
CountyCarroll County
StateIowa
Coordinates41.90665, -95.07049
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment7: Better than present minimum criteria
Operating rating55.3 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length93 ft (28.3 m)
Longest span35 ft (10.7 m)
Deck width56 ft (17.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,550 (2023)
Projected traffic3,550 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 141 over West Nishnabotna River built?

It was built in 1962, making it 63 years old in 2025.

What condition is Ia 141 over West Nishnabotna River 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 Ia 141 over West Nishnabotna River carry?

About 3,550 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Ia 141 over West Nishnabotna River?

The structure is 93 ft (28.3 m) long with a longest span of 35 ft (10.7 m) and a deck 56 ft wide.

Who owns Ia 141 over West Nishnabotna River?

It is owned by the State Highway Agency.