US Bridges

712 RD-635B/ 637A over N Fk Big Nemaha River TR

FairPosted for load

Richardson County, Nebraska · 2.7W1N Daw (712-635/637) · Structure no. C007421805

Built
1935
90 years old, rebuilt 1960
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

712 RD-635B/ 637A over N Fk Big Nemaha River TR is a steel stringer/multi-beam or girder carrying 712 RD-635B/ 637A over N Fk Big Nemaha River TR in Richardson County, Nebraska. It was built in 1935 and reconstructed in 1960, 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 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 50 vehicles a day, projected to reach 65 by 2041. The structure is 29 ft (8.8 m) long and 28 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

Carries712 RD-635B/ 637A
CrossesN Fk Big Nemaha River TR
Location2.7W1N Daw (712-635/637)
RouteCounty Highway 218
Coordinates40.1456, -95.8826
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.2 US tons
Inventory rating19.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span26 ft (7.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic65 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 712 RD-635B/ 637A over N Fk Big Nemaha River TR built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1960.

What condition is 712 RD-635B/ 637A over N Fk Big Nemaha River TR 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 October 2024.

How much traffic does 712 RD-635B/ 637A over N Fk Big Nemaha River TR carry?

About 50 vehicles per day (2022 count).

How long is 712 RD-635B/ 637A over N Fk Big Nemaha River TR?

The structure is 29 ft (8.8 m) long with a longest span of 26 ft (7.9 m) and a deck 28 ft wide.

Who owns 712 RD-635B/ 637A over N Fk Big Nemaha River TR?

It is owned by the County Highway Agency.