US Bridges

FM 460th ST over Middle Branch Blue Earth

Poor

Kossuth County, Iowa · 099270601 · Structure no. 000000000216780

Built
1967
58 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
5
2022 count
Owner
County
County Highway Agency

About this bridge

FM 460th ST over Middle Branch Blue Earth is a steel stringer/multi-beam or girder carrying FM 460th ST over Middle Branch Blue Earth in Kossuth County, Iowa. It was built in 1967, so it is 58 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5 vehicles a day, projected to reach 5 by 2043. The structure is 57 ft (17.3 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesFM 460th ST
CrossesMiddle Branch Blue Earth
Location099270601
RouteCounty Highway 0
StateIowa
Coordinates43.4299, -94.06986
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.8 US tons
Inventory rating18.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length57 ft (17.3 m)
Longest span55 ft (16.8 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2022)
Projected traffic5 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 460th ST over Middle Branch Blue Earth built?

It was built in 1967, making it 58 years old in 2025.

What condition is FM 460th ST over Middle Branch Blue Earth in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does FM 460th ST over Middle Branch Blue Earth carry?

About 5 vehicles per day (2022 count).

How long is FM 460th ST over Middle Branch Blue Earth?

The structure is 57 ft (17.3 m) long with a longest span of 55 ft (16.8 m) and a deck 30 ft wide.

Who owns FM 460th ST over Middle Branch Blue Earth?

It is owned by the County Highway Agency.