US Bridges

N4639 (0126C) over Smith Hollow Creek

Good

Adair County, Oklahoma · 3.9N of SH 100 · Structure no. 318360000000000

Built
2022
3 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
135 ft
3 main spans
Daily traffic
350
2022 count
Owner
County
County Highway Agency

About this bridge

N4639 (0126C) over Smith Hollow Creek is a prestressed concrete stringer/multi-beam or girder carrying N4639 (0126C) over Smith Hollow Creek in Adair County, Oklahoma. It was built in 2022, so it is 3 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 350 vehicles a day, roughly 10% of them trucks, projected to reach 520 by 2042. The structure is 135 ft (41.1 m) long and 26 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesN4639 (0126C)
CrossesSmith Hollow Creek
Location3.9N of SH 100
RouteCounty Highway N4639
CountyAdair County
StateOklahoma
Coordinates35.82792, -94.75519
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation9: Superior to present desirable 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 alignment9: Superior to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length135 ft (41.1 m)
Longest span60 ft (18.3 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic350 (2022)
Projected traffic520 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N4639 (0126C) over Smith Hollow Creek built?

It was built in 2022, making it 3 years old in 2025.

What condition is N4639 (0126C) over Smith Hollow 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 July 2023.

How much traffic does N4639 (0126C) over Smith Hollow Creek carry?

About 350 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N4639 (0126C) over Smith Hollow Creek?

The structure is 135 ft (41.1 m) long with a longest span of 60 ft (18.3 m) and a deck 26 ft wide.

Who owns N4639 (0126C) over Smith Hollow Creek?

It is owned by the County Highway Agency.