US Bridges

Loc 510th ST over Middle Branch Blue Earth

FairPosted for load

Kossuth County, Iowa · 100281201 · Structure no. 000000000217459

Built
1984
41 years old
Condition
Fair
inspected May 2023
Type
Slab
Wood or Timber
Length
84 ft
3 main spans
Daily traffic
26
2021 count
Owner
County
County Highway Agency

About this bridge

Loc 510th ST over Middle Branch Blue Earth is a wood or timber slab carrying Loc 510th ST over Middle Branch Blue Earth in Kossuth County, Iowa. It was built in 1984, so it is 41 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 26 vehicles a day, projected to reach 26 by 2043. The structure is 84 ft (25.5 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLoc 510th ST
CrossesMiddle Branch Blue Earth
Location100281201
RouteCounty Highway 0
CountyKossuth County
StateIowa
Coordinates43.50012, -94.10701
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 rating41 US tons
Inventory rating32.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadH 20
Structure length84 ft (25.5 m)
Longest span32 ft (9.8 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2021)
Projected traffic26 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 Loc 510th ST over Middle Branch Blue Earth built?

It was built in 1984, making it 41 years old in 2025.

What condition is Loc 510th ST over Middle Branch Blue Earth in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does Loc 510th ST over Middle Branch Blue Earth carry?

About 26 vehicles per day (2021 count).

How long is Loc 510th ST over Middle Branch Blue Earth?

The structure is 84 ft (25.5 m) long with a longest span of 32 ft (9.8 m) and a deck 30 ft wide.

Who owns Loc 510th ST over Middle Branch Blue Earth?

It is owned by the County Highway Agency.