US Bridges

Local over E Br W Nishnabotna River

Fair

Audubon County, Iowa · 081362502 · Structure no. 000000000069871

Built
1986
39 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
139 ft
3 main spans
Daily traffic
41
2022 count
Owner
County
County Highway Agency

About this bridge

Local over E Br W Nishnabotna River is a prestressed concrete stringer/multi-beam or girder carrying Local over E Br W Nishnabotna River in Audubon County, Iowa. It was built in 1986, so it is 39 years old, younger 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 41 vehicles a day, roughly 7% of them trucks, projected to reach 41 by 2043. The structure is 139 ft (42.4 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLocal
CrossesE Br W Nishnabotna River
Location081362502
RouteCounty Highway 0
CountyAudubon County
StateIowa
Coordinates41.79926, -94.99577
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54.9 US tons
Inventory rating32.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length139 ft (42.4 m)
Longest span52 ft (15.9 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41 (2022)
Projected traffic41 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over E Br W Nishnabotna River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Local over E Br W 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 September 2023.

How much traffic does Local over E Br W Nishnabotna River carry?

About 41 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Local over E Br W Nishnabotna River?

The structure is 139 ft (42.4 m) long with a longest span of 52 ft (15.9 m) and a deck 27 ft wide.

Who owns Local over E Br W Nishnabotna River?

It is owned by the County Highway Agency.