US Bridges

646 AV-711 / 712 R over Muddy Creek

FairPosted for load

Richardson County, Nebraska · 73/75 6.5E.6S(646-711712) · Structure no. C007423310

Built
1953
72 years old
Condition
Fair
inspected June 2023
Type
Truss - Thru
Steel
Length
223 ft
1 main span
Daily traffic
100
2011 count
Owner
County
County Highway Agency

About this bridge

646 AV-711 / 712 R over Muddy Creek is a steel truss - thru carrying 646 AV-711 / 712 R over Muddy Creek in Richardson County, Nebraska. It was built in 1953, so it is 72 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 100 vehicles a day, projected to reach 120 by 2033. The structure is 223 ft (68 m) long and 25 ft wide. If it were closed, the detour would be 18.6 mi (30 km).

Location

Open in Google Maps
Carries646 AV-711 / 712 R
CrossesMuddy Creek
Location73/75 6.5E.6S(646-711712)
RouteCounty Highway 3645
CountyRichardson County
StateNebraska
Coordinates40.1378, -95.7092
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating9.9 US tons
Inventory rating5.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadUnknown
Structure length223 ft (68 m)
Longest span100 ft (30.5 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2011)
Projected traffic120 by 2033
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 646 AV-711 / 712 R over Muddy Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is 646 AV-711 / 712 R over Muddy Creek 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 June 2023.

How much traffic does 646 AV-711 / 712 R over Muddy Creek carry?

About 100 vehicles per day (2011 count).

How long is 646 AV-711 / 712 R over Muddy Creek?

The structure is 223 ft (68 m) long with a longest span of 100 ft (30.5 m) and a deck 25 ft wide.

Who owns 646 AV-711 / 712 R over Muddy Creek?

It is owned by the County Highway Agency.