US Bridges

S86B Natl Forest over Middle Loup River

Fair

Thomas County, Nebraska · 1SW Halsey · Structure no. SS86B00021

Built
1952
73 years old
Condition
Fair
inspected November 2023
Type
Slab
Concrete Continuous
Length
74 ft
3 main spans
Daily traffic
135
2018 count
Owner
State
State Highway Agency

About this bridge

S86B Natl Forest over Middle Loup River is a concrete continuous slab carrying S86B Natl Forest over Middle Loup River in Thomas County, Nebraska. It was built in 1952, so it is 73 years old, older than the Nebraska average of 47.1 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.

It carries about 135 vehicles a day, roughly 11% of them trucks, projected to reach 149 by 2038. The structure is 74 ft (22.6 m) long and 29 ft wide. If it were closed, the detour would be 298.3 mi (480 km).

Location

Open in Google Maps
CarriesS86B Natl Forest
CrossesMiddle Loup River
Location1SW Halsey
RouteState Highway 0S86B
CountyThomas County
StateNebraska
Coordinates41.9021, -100.2984
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating44.1 US tons
Inventory rating26.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length74 ft (22.6 m)
Longest span30 ft (9.1 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic135 (2018)
Projected traffic149 by 2038
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed298.3 mi (480 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S86B Natl Forest over Middle Loup River built?

It was built in 1952, making it 73 years old in 2025.

What condition is S86B Natl Forest over Middle Loup River 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 November 2023.

How much traffic does S86B Natl Forest over Middle Loup River carry?

About 135 vehicles per day (2018 count), of which roughly 11% are trucks.

How long is S86B Natl Forest over Middle Loup River?

The structure is 74 ft (22.6 m) long with a longest span of 30 ft (9.1 m) and a deck 29 ft wide.

Who owns S86B Natl Forest over Middle Loup River?

It is owned by the State Highway Agency.