US Bridges

7430C over Nellie Bly Creek

Fair

Washington County, Oklahoma · 13.5S&.5E US75&60;TULSA C · Structure no. 101120000000000

Built
1944
81 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
45 ft
3 main spans
Daily traffic
300
2022 count
Owner
County
County Highway Agency

About this bridge

7430C over Nellie Bly Creek is a concrete culvert carrying 7430C over Nellie Bly Creek in Washington County, Oklahoma. It was built in 1944, so it is 81 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.

It carries about 300 vehicles a day, roughly 15% of them trucks, projected to reach 480 by 2042. The structure is 45 ft (13.7 m) long and 39 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries7430C
CrossesNellie Bly Creek
Location13.5S&.5E US75&60;TULSA C
RouteCounty Highway 7430C
CountyWashington County
StateOklahoma
Coordinates36.53242, -95.92716
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.6 US tons
Inventory rating27.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span17 ft (5.2 m)
Deck width39 ft (11.9 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2022)
Projected traffic480 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 7430C over Nellie Bly Creek built?

It was built in 1944, making it 81 years old in 2025.

What condition is 7430C over Nellie Bly 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 November 2024.

How much traffic does 7430C over Nellie Bly Creek carry?

About 300 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is 7430C over Nellie Bly Creek?

The structure is 45 ft (13.7 m) long with a longest span of 17 ft (5.2 m) and a deck 39 ft wide.

Who owns 7430C over Nellie Bly Creek?

It is owned by the County Highway Agency.