US Bridges

US 59 over Dry Run

Fair

O'Brien County, Iowa · 5.1 Mi. N of N Jct. Ia 10 · Structure no. 000000000038311

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
128 ft
3 main spans
Daily traffic
1,170
2023 count
Owner
State
State Highway Agency

About this bridge

US 59 over Dry Run is a concrete continuous slab carrying US 59 over Dry Run in O'Brien County, Iowa. It was built in 1973, so it is 52 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 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 1,170 vehicles a day, roughly 26% of them trucks, projected to reach 1,170 by 2043. The structure is 128 ft (39 m) long and 47 ft wide. If it were closed, the detour would be 13 mi (21 km).

CarriesUS 59
CrossesDry Run
Location5.1 Mi. N of N Jct. Ia 10
RouteU.S. Route 59
StateIowa
Coordinates43.05724, -95.62419
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.3 US tons
Inventory rating38.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span49 ft (14.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,170 (2023)
Projected traffic1,170 by 2043
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 US 59 over Dry Run built?

It was built in 1973, making it 52 years old in 2025.

What condition is US 59 over Dry Run 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 59 over Dry Run carry?

About 1,170 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is US 59 over Dry Run?

The structure is 128 ft (39 m) long with a longest span of 49 ft (14.9 m) and a deck 47 ft wide.

Who owns US 59 over Dry Run?

It is owned by the State Highway Agency.