US Bridges

Local over Nishnabotna Trib

Good

Montgomery County, Iowa · 073380204 · Structure no. 000000000256471

Built
1992
33 years old
Condition
Good
inspected May 2021
Type
Culvert
Steel
Length
30 ft
4 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Nishnabotna Trib is a steel culvert carrying Local over Nishnabotna Trib in Montgomery County, Iowa. It was built in 1992, so it is 33 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 50 vehicles a day, projected to reach 50 by 2043. The structure is 30 ft (9.1 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLocal
CrossesNishnabotna Trib
Location073380204
RouteCounty Highway 0
CountyMontgomery County
StateIowa
Coordinates41.14978, -95.18486
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2021
Inspection intervalevery 48 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans4
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span6 ft (1.8 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic50 by 2043
Trucks0%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local over Nishnabotna Trib built?

It was built in 1992, making it 33 years old in 2025.

What condition is Local over Nishnabotna Trib 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 May 2021.

How much traffic does Local over Nishnabotna Trib carry?

About 50 vehicles per day (2022 count).

How long is Local over Nishnabotna Trib?

The structure is 30 ft (9.1 m) long with a longest span of 6 ft (1.8 m) and a deck 24 ft wide.

Who owns Local over Nishnabotna Trib?

It is owned by the County Highway Agency.