US Bridges

N4644 (0126C) over Smith Hollow Creek

Good

Adair County, Oklahoma · 2.9N 3.3E of SH 100 · Structure no. 226050000000000

Built
1990
35 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
103 ft
1 main span
Daily traffic
467
2022 count
Owner
County
County Highway Agency

About this bridge

N4644 (0126C) over Smith Hollow Creek is a prestressed concrete stringer/multi-beam or girder carrying N4644 (0126C) over Smith Hollow Creek in Adair County, Oklahoma. It was built in 1990, so it is 35 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 467 vehicles a day, roughly 15% of them trucks, projected to reach 747 by 2042. The structure is 103 ft (31.4 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesN4644 (0126C)
CrossesSmith Hollow Creek
Location2.9N 3.3E of SH 100
RouteCounty Highway N4644
CountyAdair County
StateOklahoma
Coordinates35.80344, -94.74706
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating80 US tons
Inventory rating61.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length103 ft (31.4 m)
Longest span96 ft (29.3 m)
Deck width35 ft (10.6 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic467 (2022)
Projected traffic747 by 2042
Trucks15%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$508,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4644 (0126C) over Smith Hollow Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is N4644 (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 N4644 (0126C) over Smith Hollow Creek carry?

About 467 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N4644 (0126C) over Smith Hollow Creek?

The structure is 103 ft (31.4 m) long with a longest span of 96 ft (29.3 m) and a deck 35 ft wide.

Who owns N4644 (0126C) over Smith Hollow Creek?

It is owned by the County Highway Agency.