US Bridges

Ia 10 over Dry Run

Fair

O'Brien County, Iowa · 0.2 Mi. W of W Jct. US 59 · Structure no. 000000000038370

Built
1969
56 years old
Condition
Fair
inspected April 2022
Type
Slab
Concrete Continuous
Length
103 ft
3 main spans
Daily traffic
1,130
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 10 over Dry Run is a concrete continuous slab carrying Ia 10 over Dry Run in O'Brien County, Iowa. It was built in 1969, so it is 56 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 1,130 vehicles a day, roughly 23% of them trucks, projected to reach 1,130 by 2043. The structure is 103 ft (31.4 m) long and 47 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesIa 10
CrossesDry Run
Location0.2 Mi. W of W Jct. US 59
RouteState Highway 10
CountyO'Brien County
StateIowa
Coordinates42.98307, -95.62881
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2022
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 geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.3 US tons
Inventory rating39.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span39 ft (11.9 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,130 (2023)
Projected traffic1,130 by 2043
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 10 over Dry Run built?

It was built in 1969, making it 56 years old in 2025.

What condition is Ia 10 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 April 2022.

How much traffic does Ia 10 over Dry Run carry?

About 1,130 vehicles per day (2023 count), of which roughly 23% are trucks.

How long is Ia 10 over Dry Run?

The structure is 103 ft (31.4 m) long with a longest span of 39 ft (11.9 m) and a deck 47 ft wide.

Who owns Ia 10 over Dry Run?

It is owned by the State Highway Agency.