US Bridges

Ia 15 over W Fork Des Moines River

Good

Humboldt County, Iowa · 0.4 Mi. W of Jct. SR P19 · Structure no. 000000000029021

Built
2014
11 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
247 ft
3 main spans
Daily traffic
490
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 15 over W Fork Des Moines River is a prestressed concrete stringer/multi-beam or girder carrying Ia 15 over W Fork Des Moines River in Humboldt County, Iowa. It was built in 2014, so it is 11 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 490 vehicles a day, roughly 21% of them trucks, projected to reach 490 by 2044. The structure is 247 ft (75.3 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIa 15
CrossesW Fork Des Moines River
Location0.4 Mi. W of Jct. SR P19
RouteState Highway 15
StateIowa
Coordinates42.89171, -94.44323
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length247 ft (75.3 m)
Longest span82 ft (25 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic490 (2022)
Projected traffic490 by 2044
Trucks21%
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

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 15 over W Fork Des Moines River built?

It was built in 2014, making it 11 years old in 2025.

What condition is Ia 15 over W Fork Des Moines 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 July 2024.

How much traffic does Ia 15 over W Fork Des Moines River carry?

About 490 vehicles per day (2022 count), of which roughly 21% are trucks.

How long is Ia 15 over W Fork Des Moines River?

The structure is 247 ft (75.3 m) long with a longest span of 82 ft (25 m) and a deck 47 ft wide.

Who owns Ia 15 over W Fork Des Moines River?

It is owned by the State Highway Agency.