US Bridges

N3850 over Briar Creek Trib.

Fair

Okmulgee County, Oklahoma · 2.0 E Okf C/L; 0.9 S SH56 · Structure no. 255480000000000

Built
1998
27 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3850 over Briar Creek Trib. is a concrete culvert carrying N3850 over Briar Creek Trib. in Okmulgee County, Oklahoma. It was built in 1998, so it is 27 years old, younger 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesN3850
CrossesBriar Creek Trib.
Location2.0 E Okf C/L; 0.9 S SH56
RouteCounty Highway N3850
CountyOkmulgee County
StateOklahoma
Coordinates35.5816, -96.15731
Functional classRural Local

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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.9 US tons
Inventory rating40.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHL 93
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 traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3850 over Briar Creek Trib. built?

It was built in 1998, making it 27 years old in 2025.

What condition is N3850 over Briar Creek Trib. 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 September 2024.

How much traffic does N3850 over Briar Creek Trib. carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3850 over Briar Creek Trib.?

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

Who owns N3850 over Briar Creek Trib.?

It is owned by the County Highway Agency.