US Bridges

FM 500th ST over W Br Blue Earth River

Good

Kossuth County, Iowa · 100281601 · Structure no. 000000000217481

Built
2009
16 years old
Condition
Good
inspected May 2023
Type
Slab
Concrete Continuous
Length
110 ft
3 main spans
Daily traffic
150
2021 count
Owner
County
County Highway Agency

About this bridge

FM 500th ST over W Br Blue Earth River is a concrete continuous slab carrying FM 500th ST over W Br Blue Earth River in Kossuth County, Iowa. It was built in 2009, so it is 16 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 150 vehicles a day, roughly 27% of them trucks, projected to reach 150 by 2043. The structure is 110 ft (33.6 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFM 500th ST
CrossesW Br Blue Earth River
Location100281601
RouteCounty Highway 0
StateIowa
Coordinates43.48803, -94.15421
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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
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 rating53.9 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length110 ft (33.6 m)
Longest span43 ft (13.1 m)
Deck width33 ft (10.2 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2021)
Projected traffic150 by 2043
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 500th ST over W Br Blue Earth River built?

It was built in 2009, making it 16 years old in 2025.

What condition is FM 500th ST over W Br Blue Earth River 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 2023.

How much traffic does FM 500th ST over W Br Blue Earth River carry?

About 150 vehicles per day (2021 count), of which roughly 27% are trucks.

How long is FM 500th ST over W Br Blue Earth River?

The structure is 110 ft (33.6 m) long with a longest span of 43 ft (13.1 m) and a deck 33 ft wide.

Who owns FM 500th ST over W Br Blue Earth River?

It is owned by the County Highway Agency.