US Bridges

NS-176 Co. Rd. over I-40 under

Good

Beckham County, Oklahoma · 9.0 MI E Texas St. Line · Structure no. 183480000000000

Built
1972
53 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
296 ft
2 main spans
Daily traffic
75
2022 count
Owner
State
State Highway Agency

About this bridge

NS-176 Co. Rd. over I-40 under is a steel continuous stringer/multi-beam or girder carrying NS-176 Co. Rd. over I-40 under in Beckham County, Oklahoma. It was built in 1972, so it is 53 years old, older 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 75 vehicles a day, roughly 26% of them trucks, projected to reach 120 by 2042. The structure is 296 ft (90.2 m) long and 33 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesNS-176 Co. Rd.
CrossesI-40 under
Location9.0 MI E Texas St. Line
RouteCounty Highway N1760
CountyBeckham County
StateOklahoma
Coordinates35.22667, -99.84139
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.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadH 20
Structure length296 ft (90.2 m)
Longest span111 ft (33.8 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic120 by 2042
Trucks26%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$2.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was NS-176 Co. Rd. over I-40 under built?

It was built in 1972, making it 53 years old in 2025.

What condition is NS-176 Co. Rd. over I-40 under 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 February 2023.

How much traffic does NS-176 Co. Rd. over I-40 under carry?

About 75 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is NS-176 Co. Rd. over I-40 under?

The structure is 296 ft (90.2 m) long with a longest span of 111 ft (33.8 m) and a deck 33 ft wide.

Who owns NS-176 Co. Rd. over I-40 under?

It is owned by the State Highway Agency.