US Bridges

N4320 over Bitter Creek

Good

Mayes County, Oklahoma · 1.5MI N. of Pryor · Structure no. 232130000000000

Built
1992
33 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
250
2022 count
Owner
County
County Highway Agency

About this bridge

N4320 over Bitter Creek is a prestressed concrete stringer/multi-beam or girder carrying N4320 over Bitter Creek in Mayes County, Oklahoma. It was built in 1992, so it is 33 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 250 vehicles a day, roughly 10% of them trucks, projected to reach 400 by 2042. The structure is 133 ft (40.5 m) long and 29 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesN4320
CrossesBitter Creek
Location1.5MI N. of Pryor
RouteCounty Highway N4320
Coordinates36.34284, -95.30999
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating40.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length133 ft (40.5 m)
Longest span50 ft (15.2 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2022)
Projected traffic400 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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$591,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4320 over Bitter Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is N4320 over Bitter 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 April 2023.

How much traffic does N4320 over Bitter Creek carry?

About 250 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N4320 over Bitter Creek?

The structure is 133 ft (40.5 m) long with a longest span of 50 ft (15.2 m) and a deck 29 ft wide.

Who owns N4320 over Bitter Creek?

It is owned by the County Highway Agency.