US Bridges

N4608 over Brush Creek

PoorPosted for load

Delaware County, Oklahoma · 1.2 MI S of Jay · Structure no. 246830000000000

Built
1998
27 years old
Condition
Poor
inspected January 2023
Type
Tee Beam
Prestressed Concrete
Length
91 ft
3 main spans
Daily traffic
150
2022 count
Owner
County
County Highway Agency

About this bridge

N4608 over Brush Creek is a prestressed concrete tee beam carrying N4608 over Brush Creek in Delaware 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 poor condition with a lowest component rating of 4 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 15% of them trucks, projected to reach 240 by 2042. The structure is 91 ft (27.7 m) long and 28 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesN4608
CrossesBrush Creek
Location1.2 MI S of Jay
RouteCounty Highway N4608
Coordinates36.40547, -94.79557
Functional classRural Major Collector

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.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.2 US tons
Inventory rating34.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length91 ft (27.7 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2022)
Projected traffic240 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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$483,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4608 over Brush Creek built?

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

What condition is N4608 over Brush 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 January 2023.

How much traffic does N4608 over Brush Creek carry?

About 150 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N4608 over Brush Creek?

The structure is 91 ft (27.7 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns N4608 over Brush Creek?

It is owned by the County Highway Agency.