US Bridges

Local over Nishnabotna Trib

Fair

Montgomery County, Iowa · 071392401 · Structure no. 000000000254970

Built
1965
60 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
51
2021 count
Owner
County
County Highway Agency

About this bridge

Local over Nishnabotna Trib is a concrete continuous culvert carrying Local over Nishnabotna Trib in Montgomery County, Iowa. It was built in 1965, so it is 60 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 51 vehicles a day, projected to reach 51 by 2043. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLocal
CrossesNishnabotna Trib
Location071392401
RouteCounty Highway 0
CountyMontgomery County
StateIowa
Coordinates40.94481, -95.28467
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.8 US tons
Inventory rating24.4 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length30 ft (9.1 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51 (2021)
Projected traffic51 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Nishnabotna Trib built?

It was built in 1965, making it 60 years old in 2025.

What condition is Local over Nishnabotna Trib 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 May 2023.

How much traffic does Local over Nishnabotna Trib carry?

About 51 vehicles per day (2021 count).

How long is Local over Nishnabotna Trib?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m).

Who owns Local over Nishnabotna Trib?

It is owned by the County Highway Agency.