US Bridges

S.H. 51 Alt. over U.S. Gypsum Rd. under

Good

Blaine County, Oklahoma · 2.9 Mi. N JCT S.H. 51 · Structure no. 187140000000000

Built
1974
51 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
117 ft
3 main spans
Daily traffic
620
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 51 Alt. over U.S. Gypsum Rd. under is a prestressed concrete stringer/multi-beam or girder carrying S.H. 51 Alt. over U.S. Gypsum Rd. under in Blaine County, Oklahoma. It was built in 1974, so it is 51 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 620 vehicles a day, roughly 16% of them trucks, projected to reach 992 by 2042. The structure is 117 ft (35.7 m) long and 35 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesS.H. 51 Alt.
CrossesU.S. Gypsum Rd. under
Location2.9 Mi. N JCT S.H. 51
RouteState Highway 51A
CountyBlaine County
StateOklahoma
Coordinates36.09522, -98.47621
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.8 US tons
Inventory rating47.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length117 ft (35.7 m)
Longest span46 ft (14 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic620 (2022)
Projected traffic992 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed16.8 mi (27 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$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was S.H. 51 Alt. over U.S. Gypsum Rd. under built?

It was built in 1974, making it 51 years old in 2025.

What condition is S.H. 51 Alt. over U.S. Gypsum Rd. under in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does S.H. 51 Alt. over U.S. Gypsum Rd. under carry?

About 620 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is S.H. 51 Alt. over U.S. Gypsum Rd. under?

The structure is 117 ft (35.7 m) long with a longest span of 46 ft (14 m) and a deck 35 ft wide.

Who owns S.H. 51 Alt. over U.S. Gypsum Rd. under?

It is owned by the State Highway Agency.