US Bridges

E46 240th ST over West Nishnabotna River

Good

Carroll County, Iowa · 083361601 · Structure no. 000000000094861

Built
2016
9 years old
Condition
Good
inspected May 2021
Type
Slab
Concrete Continuous
Length
73 ft
3 main spans
Daily traffic
34
2022 count
Owner
County
County Highway Agency

About this bridge

E46 240th ST over West Nishnabotna River is a concrete continuous slab carrying E46 240th ST over West Nishnabotna River in Carroll County, Iowa. It was built in 2016, so it is 9 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 34 vehicles a day, projected to reach 34 by 2043. The structure is 73 ft (22.4 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesE46 240th ST
CrossesWest Nishnabotna River
Location083361601
RouteCounty Highway 0
CountyCarroll County
StateIowa
Coordinates42.00825, -95.04798
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMay 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating59 US tons
Inventory rating45.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length73 ft (22.4 m)
Longest span28 ft (8.5 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2022)
Projected traffic34 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 E46 240th ST over West Nishnabotna River built?

It was built in 2016, making it 9 years old in 2025.

What condition is E46 240th ST over West Nishnabotna River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2021.

How much traffic does E46 240th ST over West Nishnabotna River carry?

About 34 vehicles per day (2022 count).

How long is E46 240th ST over West Nishnabotna River?

The structure is 73 ft (22.4 m) long with a longest span of 28 ft (8.5 m) and a deck 33 ft wide.

Who owns E46 240th ST over West Nishnabotna River?

It is owned by the County Highway Agency.