US Bridges

FM over Lyons Creek

Good

Shelby County, Iowa · 080392403 · Structure no. 000000000306490

Built
1992
33 years old
Condition
Good
inspected April 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
154 ft
3 main spans
Daily traffic
450
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Lyons Creek is a prestressed concrete stringer/multi-beam or girder carrying FM over Lyons Creek in Shelby County, Iowa. It was built in 1992, so it is 33 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 450 vehicles a day, roughly 6% of them trucks, projected to reach 450 by 2043. The structure is 154 ft (46.9 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesFM
CrossesLyons Creek
Location080392403
RouteCounty Highway 0
StateIowa
Coordinates41.73251, -95.33137
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating39.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length154 ft (46.9 m)
Longest span55 ft (16.8 m)
Deck width32 ft (9.8 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2022)
Projected traffic450 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 FM over Lyons Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is FM over Lyons Creek 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 April 2022.

How much traffic does FM over Lyons Creek carry?

About 450 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is FM over Lyons Creek?

The structure is 154 ft (46.9 m) long with a longest span of 55 ft (16.8 m) and a deck 32 ft wide.

Who owns FM over Lyons Creek?

It is owned by the County Highway Agency.