US Bridges

SR 105 over I-35

Fair

Worth County, Iowa · At Jct. S.R. 105 · Structure no. 000000000600220

Built
1972
53 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
292 ft
4 main spans
Daily traffic
4,419
2022 count
Owner
State
State Highway Agency

About this bridge

SR 105 over I-35 is a steel continuous stringer/multi-beam or girder carrying SR 105 over I-35 in Worth County, Iowa. It was built in 1972, so it is 53 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 4,419 vehicles a day, roughly 8% of them trucks, projected to reach 4,419 by 2044. The structure is 292 ft (89 m) long and 35 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSR 105
CrossesI-35
LocationAt Jct. S.R. 105
RouteCounty Highway 0
CountyWorth County
StateIowa
Coordinates43.44436, -93.35009
Functional classRural Major 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating65.5 US tons
Inventory rating39.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length292 ft (89 m)
Longest span94 ft (28.7 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,419 (2022)
Projected traffic4,419 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed9.9 mi (16 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 SR 105 over I-35 built?

It was built in 1972, making it 53 years old in 2025.

What condition is SR 105 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 SR 105 over I-35 carry?

About 4,419 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is SR 105 over I-35?

The structure is 292 ft (89 m) long with a longest span of 94 ft (28.7 m) and a deck 35 ft wide.

Who owns SR 105 over I-35?

It is owned by the State Highway Agency.