US Bridges

707 RD-630 / 631 a over South Fork Big Nemaha TR

PoorPosted for load

Richardson County, Nebraska · 6S 3W Humb (707-630/631) · Structure no. C007402805

Built
1935
90 years old
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
4 main spans
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

707 RD-630 / 631 a over South Fork Big Nemaha TR is a steel stringer/multi-beam or girder carrying 707 RD-630 / 631 a over South Fork Big Nemaha TR in Richardson County, Nebraska. It was built in 1935, so it is 90 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 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. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, projected to reach 68 by 2040. The structure is 95 ft (29 m) long and 17 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Carries707 RD-630 / 631 a
CrossesSouth Fork Big Nemaha TR
Location6S 3W Humb (707-630/631)
RouteCounty Highway 28
Coordinates40.0733, -96.0099
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18.7 US tons
Inventory rating11 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans4
Design loadUnknown
Structure length95 ft (29 m)
Longest span32 ft (9.7 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic68 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18.6 mi (30 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 707 RD-630 / 631 a over South Fork Big Nemaha TR built?

It was built in 1935, making it 90 years old in 2025.

What condition is 707 RD-630 / 631 a over South Fork Big Nemaha TR 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 October 2023.

How much traffic does 707 RD-630 / 631 a over South Fork Big Nemaha TR carry?

About 40 vehicles per day (2023 count).

How long is 707 RD-630 / 631 a over South Fork Big Nemaha TR?

The structure is 95 ft (29 m) long with a longest span of 32 ft (9.7 m) and a deck 17 ft wide.

Who owns 707 RD-630 / 631 a over South Fork Big Nemaha TR?

It is owned by the County Highway Agency.