US Bridges

FM over Silver Creek

Good

Palo Alto County, Iowa · 095342401 · Structure no. 000000000269551

Built
2006
19 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
538
2022 count
Owner
County
County Highway Agency

About this bridge

FM over Silver Creek is a concrete continuous slab carrying FM over Silver Creek in Palo Alto 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 538 vehicles a day, roughly 23% of them trucks, projected to reach 538 by 2044. The structure is 80 ft (24.4 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesFM
CrossesSilver Creek
Location095342401
RouteCounty Highway 0
StateIowa
Coordinates43.03887, -94.81167
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
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 alignment7: Better than present minimum criteria
Operating rating84.1 US tons
Inventory rating50.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span29 ft (8.8 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic538 (2022)
Projected traffic538 by 2044
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Silver Creek built?

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

What condition is FM over Silver 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 May 2024.

How much traffic does FM over Silver Creek carry?

About 538 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is FM over Silver Creek?

The structure is 80 ft (24.4 m) long with a longest span of 29 ft (8.8 m) and a deck 32 ft wide.

Who owns FM over Silver Creek?

It is owned by the County Highway Agency.