N3950 over Creek

Poor

Tulsa County, Oklahoma · 3.NE of Skiatook · Structure no. 066240000000000

Built: 1939; 86 years old
Condition: Poor; inspected August 2023
Type: Culvert; Concrete
Length: 23 ft; 2 main spans
Daily traffic: 699; 2024 count
Owner: County; County Highway Agency

About this bridge

N3950 over Creek is a concrete culvert carrying N3950 over Creek in Tulsa 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 699 vehicles a day, roughly 10% of them trucks, projected to reach 1,119 by 2044. The structure is 23 ft (7 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesN3950

CrossesCreek

Location3.NE of Skiatook

RouteCounty Highway N3950

CountyTulsa County

StateOklahoma

Coordinates36.40098, -95.97356

Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

Component	Rating	Meaning
Channel and channel protection	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert	3 Serious	Loss of section, deterioration, spalling or scour have seriously affected primary structural components.

Last inspectionAugust 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourScour critical; foundations unstable for calculated scour conditions

Structural evaluation3: Basically intolerable, requiring high priority of corrective action

Deck geometry6: Equal to present minimum criteria

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment7: Better than present minimum criteria

Operating rating47 US tons

Inventory rating36 US tons

Structure

Structure typeCulvert

MaterialConcrete

DeckNot applicable

Main spans2

Design loadHS 20

Structure length23 ft (7 m)

Longest span10 ft (3 m)

Deck width32 ft (9.9 m)

Roadway width30 ft (9.2 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic699 (2024)

Projected traffic1,119 by 2044

Trucks10%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.1 mi (5 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 N3950 over Creek built?

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

What condition is N3950 over Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does N3950 over Creek carry?

About 699 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is N3950 over Creek?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 32 ft wide.

Who owns N3950 over Creek?

It is owned by the County Highway Agency.