US Bridges

N3620 over Little Deep Fork Creek

Good

Creek County, Oklahoma · 5.5N of Milfay · Structure no. 221690000000000

Built
1989
36 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3620 over Little Deep Fork Creek is a concrete culvert carrying N3620 over Little Deep Fork Creek in Creek County, Oklahoma. It was built in 1989, so it is 36 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 15% of them trucks, projected to reach 160 by 2042. The structure is 32 ft (9.8 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesN3620
CrossesLittle Deep Fork Creek
Location5.5N of Milfay
RouteCounty Highway N3620
Coordinates35.83511, -96.56575
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating78.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 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 N3620 over Little Deep Fork Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is N3620 over Little Deep Fork Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does N3620 over Little Deep Fork Creek carry?

About 100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3620 over Little Deep Fork Creek?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m) and a deck 36 ft wide.

Who owns N3620 over Little Deep Fork Creek?

It is owned by the County Highway Agency.