US Bridges

4930C over Sulphur Creek

FairPosted for load

Mayes County, Oklahoma · 4.1SE of SH 20 & US 69 · Structure no. 072720000000000

Built
1939
86 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
72 ft
6 main spans
Daily traffic
1,012
2022 count
Owner
County
County Highway Agency

About this bridge

4930C over Sulphur Creek is a concrete continuous slab carrying 4930C over Sulphur Creek in Mayes County, Oklahoma. It was built in 1939, so it is 86 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 1,012 vehicles a day, roughly 15% of them trucks, projected to reach 1,619 by 2042. The structure is 72 ft (21.9 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
Carries4930C
CrossesSulphur Creek
Location4.1SE of SH 20 & US 69
RouteCounty Highway 4930C
CountyMayes County
StateOklahoma
Coordinates36.26381, -95.27635
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.8 US tons
Inventory rating23.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length72 ft (21.9 m)
Longest span10 ft (3 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,012 (2022)
Projected traffic1,619 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$426,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 4930C over Sulphur Creek built?

It was built in 1939, making it 86 years old in 2025.

What condition is 4930C over Sulphur 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 April 2023.

How much traffic does 4930C over Sulphur Creek carry?

About 1,012 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 4930C over Sulphur Creek?

The structure is 72 ft (21.9 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.

Who owns 4930C over Sulphur Creek?

It is owned by the County Highway Agency.