US Bridges

Local over W Nishnabotna River

FairPosted for load

Shelby County, Iowa · 802238 · Structure no. 000000000306270

Built
1920
105 years old
Condition
Fair
inspected April 2024
Type
Truss - Thru
Steel
Length
217 ft
1 main span
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

Local over W Nishnabotna River is a steel truss - thru carrying Local over W Nishnabotna River in Shelby County, Iowa. It was built in 1920, so it is 105 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. Its operating status is: posted for load restriction.

It carries about 26 vehicles a day, roughly 15% of them trucks, projected to reach 26 by 2044. The structure is 217 ft (66.1 m) long and 16 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesLocal
CrossesW Nishnabotna River
Location802238
RouteCounty Highway 0
CountyShelby County
StateIowa
Coordinates41.72854, -95.26164
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating16 US tons
Inventory rating13 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length217 ft (66.1 m)
Longest span100 ft (30.5 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deck11 ft (3.4 m)

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2044
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over W Nishnabotna River built?

It was built in 1920, making it 105 years old in 2025.

What condition is Local over 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 April 2024.

How much traffic does Local over W Nishnabotna River carry?

About 26 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Local over W Nishnabotna River?

The structure is 217 ft (66.1 m) long with a longest span of 100 ft (30.5 m) and a deck 16 ft wide.

Who owns Local over W Nishnabotna River?

It is owned by the County Highway Agency.