US Bridges

US 275 over Nishnabotna River

Good

Fremont County, Iowa · 0.5 MI W of E Jct. Ia 333 · Structure no. 000000000025251

Built
1994
31 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
629 ft
6 main spans
Daily traffic
1,160
2022 count
Owner
State
State Highway Agency

About this bridge

US 275 over Nishnabotna River is a prestressed concrete stringer/multi-beam or girder carrying US 275 over Nishnabotna River in Fremont County, Iowa. It was built in 1994, so it is 31 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,160 vehicles a day, roughly 11% of them trucks, projected to reach 1,160 by 2044. The structure is 629 ft (191.7 m) long and 39 ft wide. If it were closed, the detour would be 26.7 mi (43 km).

CarriesUS 275
CrossesNishnabotna River
Location0.5 MI W of E Jct. Ia 333
RouteU.S. Route 275
StateIowa
Coordinates40.60136, -95.64472
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating35.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length629 ft (191.7 m)
Longest span107 ft (32.6 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,160 (2022)
Projected traffic1,160 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.7 mi (43 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 US 275 over Nishnabotna River built?

It was built in 1994, making it 31 years old in 2025.

What condition is US 275 over 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 June 2024.

How much traffic does US 275 over Nishnabotna River carry?

About 1,160 vehicles per day (2022 count), of which roughly 11% are trucks.

How long is US 275 over Nishnabotna River?

The structure is 629 ft (191.7 m) long with a longest span of 107 ft (32.6 m) and a deck 39 ft wide.

Who owns US 275 over Nishnabotna River?

It is owned by the State Highway Agency.