US Bridges

Ia 5 over Walnut Creek

Fair

Marion County, Iowa · 0.9 Miles North of SR G76 · Structure no. 000000000035140

Built
1925
100 years old, rebuilt 1962
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
50 ft
1 main span
Daily traffic
3,570
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 5 over Walnut Creek is a concrete tee beam carrying Ia 5 over Walnut Creek in Marion County, Iowa. It was built in 1925 and reconstructed in 1962, so it is 100 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 5 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 3,570 vehicles a day, roughly 15% of them trucks, projected to reach 3,570 by 2043. The structure is 50 ft (15.2 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIa 5
CrossesWalnut Creek
Location0.9 Miles North of SR G76
RouteState Highway 5
CountyMarion County
StateIowa
Coordinates41.24027, -93.02474
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.1 US tons
Inventory rating35.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,570 (2022)
Projected traffic3,570 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 over Walnut Creek built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1962.

What condition is Ia 5 over Walnut Creek 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 July 2023.

How much traffic does Ia 5 over Walnut Creek carry?

About 3,570 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Ia 5 over Walnut Creek?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 36 ft wide.

Who owns Ia 5 over Walnut Creek?

It is owned by the State Highway Agency.