US Bridges

S.H. 51 over Mulberry Hollow

Good

Adair County, Oklahoma · 6.6 SE Cherokee C/L · Structure no. 315790000000000

Built
2020
5 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
305 ft
3 main spans
Daily traffic
4,000
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 51 over Mulberry Hollow is a prestressed concrete stringer/multi-beam or girder carrying S.H. 51 over Mulberry Hollow in Adair County, Oklahoma. It was built in 2020, so it is 5 years old, younger 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 4,000 vehicles a day, projected to reach 4,025 by 2042. The structure is 305 ft (93 m) long and 42 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

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CarriesS.H. 51
CrossesMulberry Hollow
Location6.6 SE Cherokee C/L
RouteState Highway 51
CountyAdair County
StateOklahoma
Coordinates35.85556, -94.70333
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84 US tons
Inventory rating57.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length305 ft (93 m)
Longest span107 ft (32.6 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2022)
Projected traffic4,025 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 51 over Mulberry Hollow built?

It was built in 2020, making it 5 years old in 2025.

What condition is S.H. 51 over Mulberry Hollow 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 April 2024.

How much traffic does S.H. 51 over Mulberry Hollow carry?

About 4,000 vehicles per day (2022 count).

How long is S.H. 51 over Mulberry Hollow?

The structure is 305 ft (93 m) long with a longest span of 107 ft (32.6 m) and a deck 42 ft wide.

Who owns S.H. 51 over Mulberry Hollow?

It is owned by the State Highway Agency.