US Bridges

Local over Nishnabotna Trib

Fair

Montgomery County, Iowa · 073370704 · Structure no. 000000000256300

Built
1968
57 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
95 ft
3 main spans
Daily traffic
89
2022 count
Owner
County
County Highway Agency

About this bridge

Local over Nishnabotna Trib is a prestressed concrete stringer/multi-beam or girder carrying Local over Nishnabotna Trib in Montgomery County, Iowa. It was built in 1968, so it is 57 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 89 vehicles a day, projected to reach 89 by 2044. The structure is 95 ft (29 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesLocal
CrossesNishnabotna Trib
Location073370704
RouteCounty Highway 0
StateIowa
Coordinates41.14271, -95.1468
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.3 US tons
Inventory rating37.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length95 ft (29 m)
Longest span31 ft (9.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic89 (2022)
Projected traffic89 by 2044
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 1968, making it 57 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 June 2024.

How much traffic does Local over Nishnabotna Trib carry?

About 89 vehicles per day (2022 count).

How long is Local over Nishnabotna Trib?

The structure is 95 ft (29 m) long with a longest span of 31 ft (9.4 m) and a deck 26 ft wide.

Who owns Local over Nishnabotna Trib?

It is owned by the County Highway Agency.