US Bridges

S.H. 20 over Summerfield Creek

Fair

Delaware County, Oklahoma · 4.8 MI E Mayes CO · Structure no. 041600000000000

Built
1934
91 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
2,000
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 20 over Summerfield Creek is a concrete culvert carrying S.H. 20 over Summerfield Creek in Delaware County, Oklahoma. It was built in 1934, so it is 91 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 2,000 vehicles a day, roughly 16% of them trucks, projected to reach 3,200 by 2042. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 60.3 mi (97 km).

Location

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CarriesS.H. 20
CrossesSummerfield Creek
Location4.8 MI E Mayes CO
RouteState Highway 20
CountyDelaware County
StateOklahoma
Coordinates36.41694, -94.92787
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.1 US tons
Inventory rating27.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 20
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2022)
Projected traffic3,200 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed60.3 mi (97 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$644,000
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1934, making it 91 years old in 2025.

What condition is S.H. 20 over Summerfield 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 February 2024.

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

About 2,000 vehicles per day (2022 count), of which roughly 16% are trucks.

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

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m).

Who owns S.H. 20 over Summerfield Creek?

It is owned by the State Highway Agency.