US Bridges

FM RD A-39 over I-35

Fair

Worth County, Iowa · 3.0 Mi. N of Jct. Ia #9 · Structure no. 000000000600150

Built
1970
55 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
292 ft
4 main spans
Daily traffic
118
2022 count
Owner
State
State Highway Agency

About this bridge

FM RD A-39 over I-35 is a steel continuous stringer/multi-beam or girder carrying FM RD A-39 over I-35 in Worth County, Iowa. It was built in 1970, so it is 55 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 118 vehicles a day, roughly 27% of them trucks, projected to reach 118 by 2044. The structure is 292 ft (89 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFM RD A-39
CrossesI-35
Location3.0 Mi. N of Jct. Ia #9
RouteCounty Highway 0
StateIowa
Coordinates43.32797, -93.34935
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 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 geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.5 US tons
Inventory rating27.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length292 ft (89 m)
Longest span93 ft (28.3 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic118 (2022)
Projected traffic118 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 FM RD A-39 over I-35 built?

It was built in 1970, making it 55 years old in 2025.

What condition is FM RD A-39 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 April 2024.

How much traffic does FM RD A-39 over I-35 carry?

About 118 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is FM RD A-39 over I-35?

The structure is 292 ft (89 m) long with a longest span of 93 ft (28.3 m) and a deck 33 ft wide.

Who owns FM RD A-39 over I-35?

It is owned by the State Highway Agency.