US Bridges

US 169 over N Branch North River

Fair

Madison County, Iowa · 5.3 Mi. S of Jct. SR F90 · Structure no. 000000000034791

Built
1983
42 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
3 main spans
Daily traffic
4,280
2022 count
Owner
State
State Highway Agency

About this bridge

US 169 over N Branch North River is a prestressed concrete stringer/multi-beam or girder carrying US 169 over N Branch North River in Madison 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 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 4,280 vehicles a day, roughly 8% of them trucks, projected to reach 4,280 by 2043. The structure is 200 ft (61 m) long and 47 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesUS 169
CrossesN Branch North River
Location5.3 Mi. S of Jct. SR F90
RouteU.S. Route 169
StateIowa
Coordinates41.44107, -94.01537
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating91.3 US tons
Inventory rating45.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length200 ft (61 m)
Longest span69 ft (21 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,280 (2022)
Projected traffic4,280 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 US 169 over N Branch North River built?

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

What condition is US 169 over N Branch North River 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 September 2023.

How much traffic does US 169 over N Branch North River carry?

About 4,280 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is US 169 over N Branch North River?

The structure is 200 ft (61 m) long with a longest span of 69 ft (21 m) and a deck 47 ft wide.

Who owns US 169 over N Branch North River?

It is owned by the State Highway Agency.