US Bridges

N3230 (2556C) over Red Branch Creek

Fair

Garvin County, Oklahoma · 11.3 MI N SH 7 · Structure no. 203410000000000

Built
1983
42 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3230 (2556C) over Red Branch Creek is a concrete culvert carrying N3230 (2556C) over Red Branch Creek in Garvin County, Oklahoma. It was built in 1983, so it is 42 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 15% of them trucks, projected to reach 160 by 2042. The structure is 24 ft (7.4 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN3230 (2556C)
CrossesRed Branch Creek
Location11.3 MI N SH 7
RouteCounty Highway N3230
CountyGarvin County
StateOklahoma
Coordinates34.68452, -97.24755
Functional classRural Major Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.4 m)
Longest span10 ft (3 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 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 closed1.9 mi (3 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 N3230 (2556C) over Red Branch Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is N3230 (2556C) over Red Branch Creek 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 April 2024.

How much traffic does N3230 (2556C) over Red Branch Creek carry?

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

How long is N3230 (2556C) over Red Branch Creek?

The structure is 24 ft (7.4 m) long with a longest span of 10 ft (3 m) and a deck 34 ft wide.

Who owns N3230 (2556C) over Red Branch Creek?

It is owned by the County Highway Agency.