US Bridges

Ia 5 NB over North River

Good

Warren County, Iowa · 0.9 Mi. S of Jct. U.S. 65 · Structure no. 000000000051031

Built
1983
42 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
291 ft
3 main spans
Daily traffic
8,200
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 5 NB over North River is a prestressed concrete stringer/multi-beam or girder carrying Ia 5 NB over North River in Warren County, Iowa. It was built in 1983, so it is 42 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 8,200 vehicles a day, roughly 7% of them trucks, projected to reach 8,200 by 2042. The structure is 291 ft (88.7 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIa 5 NB
CrossesNorth River
Location0.9 Mi. S of Jct. U.S. 65
RouteState Highway 5
StateIowa
Coordinates41.50597, -93.50952
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.3 US tons
Inventory rating43.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length291 ft (88.7 m)
Longest span97 ft (29.6 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,200 (2022)
Projected traffic8,200 by 2042
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 5 NB over North River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Ia 5 NB over North 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 April 2023.

How much traffic does Ia 5 NB over North River carry?

About 8,200 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Ia 5 NB over North River?

The structure is 291 ft (88.7 m) long with a longest span of 97 ft (29.6 m) and a deck 47 ft wide.

Who owns Ia 5 NB over North River?

It is owned by the State Highway Agency.