US Bridges

US 18 over Ocheyedan River

Good

Clay County, Iowa · 2.3 MI W of SR M-27 · Structure no. 000000000020301

Built
2014
11 years old
Condition
Good
inspected November 2024
Type
Slab
Concrete Continuous
Length
151 ft
3 main spans
Daily traffic
2,990
2022 count
Owner
State
State Highway Agency

About this bridge

US 18 over Ocheyedan River is a concrete continuous slab carrying US 18 over Ocheyedan River in Clay 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 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 2,990 vehicles a day, roughly 26% of them trucks, projected to reach 2,990 by 2044. The structure is 151 ft (46 m) long and 47 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesUS 18
CrossesOcheyedan River
Location2.3 MI W of SR M-27
RouteU.S. Route 18
StateIowa
Coordinates43.18402, -95.37499
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum 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

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length151 ft (46 m)
Longest span55 ft (16.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,990 (2022)
Projected traffic2,990 by 2044
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 18 over Ocheyedan River built?

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

What condition is US 18 over Ocheyedan 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 November 2024.

How much traffic does US 18 over Ocheyedan River carry?

About 2,990 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is US 18 over Ocheyedan River?

The structure is 151 ft (46 m) long with a longest span of 55 ft (16.8 m) and a deck 47 ft wide.

Who owns US 18 over Ocheyedan River?

It is owned by the State Highway Agency.