US Bridges

N8 over N Fk Big Nemaha River

Poor

Richardson County, Nebraska · In Salem · Structure no. S008 14278

Built
1955
70 years old
Condition
Poor
inspected June 2023
Type
Truss - Thru
Steel
Length
254 ft
1 main span
Daily traffic
800
2018 count
Owner
State
State Highway Agency

About this bridge

N8 over N Fk Big Nemaha River is a steel truss - thru carrying N8 over N Fk Big Nemaha River in Richardson County, Nebraska. It was built in 1955, so it is 70 years old, older than the Nebraska average of 47.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 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 800 vehicles a day, roughly 8% of them trucks, projected to reach 1,040 by 2038. The structure is 254 ft (77.4 m) long and 31 ft wide. If it were closed, the detour would be 111.8 mi (180 km).

CarriesN8
CrossesN Fk Big Nemaha River
LocationIn Salem
RouteState Highway 8
Coordinates40.08, -95.715
Functional classRural Minor Arterial

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating25.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 15
Structure length254 ft (77.4 m)
Longest span160 ft (48.8 m)
Deck width31 ft (9.3 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deck15 ft (4.4 m)

Traffic and service

Average daily traffic800 (2018)
Projected traffic1,040 by 2038
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed111.8 mi (180 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N8 over N Fk Big Nemaha River built?

It was built in 1955, making it 70 years old in 2025.

What condition is N8 over N Fk Big Nemaha River 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 June 2023.

How much traffic does N8 over N Fk Big Nemaha River carry?

About 800 vehicles per day (2018 count), of which roughly 8% are trucks.

How long is N8 over N Fk Big Nemaha River?

The structure is 254 ft (77.4 m) long with a longest span of 160 ft (48.8 m) and a deck 31 ft wide.

Who owns N8 over N Fk Big Nemaha River?

It is owned by the State Highway Agency.