US Bridges

N18 T Ave over W Nodaway River

Good

Montgomery County, Iowa · 072363302 · Structure no. 000000000255201

Built
2015
10 years old
Condition
Good
inspected May 2022
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
29
2022 count
Owner
County
County Highway Agency

About this bridge

N18 T Ave over W Nodaway River is a concrete continuous culvert carrying N18 T Ave over W Nodaway River in Montgomery County, Iowa. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 29 vehicles a day, projected to reach 29 by 2043. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN18 T Ave
CrossesW Nodaway River
Location072363302
RouteCounty Highway 0
CountyMontgomery County
StateIowa
Coordinates40.9988, -95.00428
Functional classRural Minor Collector

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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating41.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length24 ft (7.3 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2022)
Projected traffic29 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 N18 T Ave over W Nodaway River built?

It was built in 2015, making it 10 years old in 2025.

What condition is N18 T Ave over W Nodaway River 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 2022.

How much traffic does N18 T Ave over W Nodaway River carry?

About 29 vehicles per day (2022 count).

How long is N18 T Ave over W Nodaway River?

The structure is 24 ft (7.3 m) long with a longest span of 12 ft (3.7 m).

Who owns N18 T Ave over W Nodaway River?

It is owned by the County Highway Agency.