US Bridges

U.S. 81 over UP R.R. under

Fair

Grady County, Oklahoma · 19.7 MI N US62 · Structure no. 192670000000000

Built
1976
49 years old
Condition
Fair
inspected November 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
363 ft
4 main spans
Daily traffic
4,900
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 81 over UP R.R. under is a steel continuous girder and floorbeam system carrying U.S. 81 over UP R.R. under in Grady County, Oklahoma. It was built in 1976, so it is 49 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 4,900 vehicles a day, roughly 25% of them trucks, projected to reach 7,840 by 2042. The structure is 363 ft (110.6 m) long and 46 ft wide. If it were closed, the detour would be 32.9 mi (53 km).

Location

Open in Google Maps
CarriesU.S. 81
CrossesUP R.R. under
Location19.7 MI N US62
RouteU.S. Route 81
CountyGrady County
StateOklahoma
Coordinates35.33739, -97.93623
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating100 US tons
Inventory rating63.4 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length363 ft (110.6 m)
Longest span100 ft (30.5 m)
Deck width46 ft (13.9 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2022)
Projected traffic7,840 by 2042
Trucks25%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed32.9 mi (53 km)
TollOn a free road
National Highway SystemYes

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$2.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. 81 over UP R.R. under built?

It was built in 1976, making it 49 years old in 2025.

What condition is U.S. 81 over UP R.R. under 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 U.S. 81 over UP R.R. under carry?

About 4,900 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is U.S. 81 over UP R.R. under?

The structure is 363 ft (110.6 m) long with a longest span of 100 ft (30.5 m) and a deck 46 ft wide.

Who owns U.S. 81 over UP R.R. under?

It is owned by the State Highway Agency.