US Bridges

Co. Rd. N3470 over Turner Tp (I-44) under

Fair

Lincoln County, Oklahoma · 35.2 MI N E JCT I-35 · Structure no. 130540000000000

Built
1953
72 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
133 ft
4 main spans
Daily traffic
5,000
2022 count
Owner
Toll Authority
State Toll Authority

About this bridge

Co. Rd. N3470 over Turner Tp (I-44) under is a steel stringer/multi-beam or girder carrying Co. Rd. N3470 over Turner Tp (I-44) under in Lincoln County, Oklahoma. It was built in 1953, so it is 72 years old, older 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 5,000 vehicles a day, roughly 15% of them trucks, projected to reach 8,000 by 2042. The structure is 133 ft (40.5 m) long and 22 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCo. Rd. N3470
CrossesTurner Tp (I-44) under
Location35.2 MI N E JCT I-35
RouteCounty Highway N3470
CountyLincoln County
StateOklahoma
Coordinates35.73059, -96.82279
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length133 ft (40.5 m)
Longest span39 ft (11.9 m)
Deck width22 ft (6.6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2022)
Projected traffic8,000 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Co. Rd. N3470 over Turner Tp (I-44) under built?

It was built in 1953, making it 72 years old in 2025.

What condition is Co. Rd. N3470 over Turner Tp (I-44) under 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 June 2024.

How much traffic does Co. Rd. N3470 over Turner Tp (I-44) under carry?

About 5,000 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Co. Rd. N3470 over Turner Tp (I-44) under?

The structure is 133 ft (40.5 m) long with a longest span of 39 ft (11.9 m) and a deck 22 ft wide.

Who owns Co. Rd. N3470 over Turner Tp (I-44) under?

It is owned by the State Toll Authority.