US Bridges

A 30 180th ST over Ia 60 ( Sibley Bypass )

Good

Osceola County, Iowa · 3.0 Mi. S of Jct. Ia 9 · Structure no. 000000000364900

Built
2006
19 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
271 ft
2 main spans
Daily traffic
439
2022 count
Owner
State
State Highway Agency

About this bridge

A 30 180th ST over Ia 60 ( Sibley Bypass ) is a prestressed concrete stringer/multi-beam or girder carrying A 30 180th ST over Ia 60 ( Sibley Bypass ) in Osceola County, Iowa. It was built in 2006, so it is 19 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 439 vehicles a day, roughly 12% of them trucks, projected to reach 439 by 2044. The structure is 271 ft (82.6 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesA 30 180th ST
CrossesIa 60 ( Sibley Bypass )
Location3.0 Mi. S of Jct. Ia 9
RouteCounty Highway 0
StateIowa
Coordinates43.38953, -95.72069
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.7 US tons
Inventory rating39.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length271 ft (82.6 m)
Longest span135 ft (41.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic439 (2022)
Projected traffic439 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 A 30 180th ST over Ia 60 ( Sibley Bypass ) built?

It was built in 2006, making it 19 years old in 2025.

What condition is A 30 180th ST over Ia 60 ( Sibley Bypass ) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does A 30 180th ST over Ia 60 ( Sibley Bypass ) carry?

About 439 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is A 30 180th ST over Ia 60 ( Sibley Bypass )?

The structure is 271 ft (82.6 m) long with a longest span of 135 ft (41.1 m) and a deck 33 ft wide.

Who owns A 30 180th ST over Ia 60 ( Sibley Bypass )?

It is owned by the State Highway Agency.