US Bridges

Ia 2 over I-35

Fair

Decatur County, Iowa · At Jct. I-35 · Structure no. 000000000022700

Built
1969
56 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
326 ft
4 main spans
Daily traffic
1,930
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 2 over I-35 is a steel continuous stringer/multi-beam or girder carrying Ia 2 over I-35 in Decatur 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 1,930 vehicles a day, roughly 18% of them trucks, projected to reach 1,930 by 2044. The structure is 326 ft (99.5 m) long and 35 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIa 2
CrossesI-35
LocationAt Jct. I-35
RouteState Highway 2
CountyDecatur County
StateIowa
Coordinates40.73876, -93.84336
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.2 US tons
Inventory rating33.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length326 ft (99.5 m)
Longest span100 ft (30.5 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,930 (2022)
Projected traffic1,930 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed3.1 mi (5 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ia 2 over I-35 built?

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

What condition is Ia 2 over I-35 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 August 2024.

How much traffic does Ia 2 over I-35 carry?

About 1,930 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Ia 2 over I-35?

The structure is 326 ft (99.5 m) long with a longest span of 100 ft (30.5 m) and a deck 35 ft wide.

Who owns Ia 2 over I-35?

It is owned by the State Highway Agency.