US Bridges

Local over E Br West Nishnabotna R

Fair

Audubon County, Iowa · 080360502 · Structure no. 000000000068631

Built
1979
46 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
278
2022 count
Owner
County
County Highway Agency

About this bridge

Local over E Br West Nishnabotna R is a concrete continuous slab carrying Local over E Br West Nishnabotna R in Audubon County, Iowa. It was built in 1979, so it is 46 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 278 vehicles a day, roughly 10% of them trucks, projected to reach 278 by 2043. The structure is 103 ft (31.4 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLocal
CrossesE Br West Nishnabotna R
Location080360502
RouteCounty Highway 0
CountyAudubon County
StateIowa
Coordinates41.76361, -95.07307
Functional classRural Major Collector

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating61 US tons
Inventory rating38.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length103 ft (31.4 m)
Longest span39 ft (11.9 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic278 (2022)
Projected traffic278 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30 million (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over E Br West Nishnabotna R built?

It was built in 1979, making it 46 years old in 2025.

What condition is Local over E Br West Nishnabotna R 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 September 2023.

How much traffic does Local over E Br West Nishnabotna R carry?

About 278 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Local over E Br West Nishnabotna R?

The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 32 ft wide.

Who owns Local over E Br West Nishnabotna R?

It is owned by the County Highway Agency.