US Bridges

S.H. 20 over Boar Creek

Fair

Osage County, Oklahoma · 6.0 Mi. E. Jct. SH99 · Structure no. 198220000000000

Built
1980
45 years old, rebuilt 2019
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
312 ft
4 main spans
Daily traffic
1,900
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 20 over Boar Creek is a prestressed concrete stringer/multi-beam or girder carrying S.H. 20 over Boar Creek in Osage County, Oklahoma. It was built in 1980 and reconstructed in 2019, so it is 45 years old, younger 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 1,900 vehicles a day, roughly 15% of them trucks, projected to reach 3,040 by 2042. The structure is 312 ft (95.1 m) long and 45 ft wide. If it were closed, the detour would be 42.3 mi (68 km).

Location

Open in Google Maps
CarriesS.H. 20
CrossesBoar Creek
Location6.0 Mi. E. Jct. SH99
RouteState Highway 20
CountyOsage County
StateOklahoma
Coordinates36.3763, -96.29522
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.4 US tons
Inventory rating34.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length312 ft (95.1 m)
Longest span78 ft (23.8 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,900 (2022)
Projected traffic3,040 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed42.3 mi (68 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$2.5 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 20 over Boar Creek built?

It was built in 1980, making it 45 years old in 2025. It was reconstructed in 2019.

What condition is S.H. 20 over Boar 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 October 2023.

How much traffic does S.H. 20 over Boar Creek carry?

About 1,900 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is S.H. 20 over Boar Creek?

The structure is 312 ft (95.1 m) long with a longest span of 78 ft (23.8 m) and a deck 45 ft wide.

Who owns S.H. 20 over Boar Creek?

It is owned by the State Highway Agency.