US Bridges

U.S. 270 Ramp S-W over I-40 /U.S. 177 under

Poor

Pottawatomie County, Oklahoma · 8.1 MI E Ok C/L · Structure no. 153790000000000

Built
1961
64 years old, rebuilt 1979
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
367 ft
4 main spans
Daily traffic
16,100
2022 count
Owner
State
State Highway Agency

About this bridge

U.S. 270 Ramp S-W over I-40 /U.S. 177 under is a steel stringer/multi-beam or girder carrying U.S. 270 Ramp S-W over I-40 /U.S. 177 under in Pottawatomie County, Oklahoma. It was built in 1961 and reconstructed in 1979, so it is 64 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 16,100 vehicles a day, roughly 15% of them trucks, projected to reach 25,760 by 2042. The structure is 367 ft (111.9 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesU.S. 270 Ramp S-W
CrossesI-40 /U.S. 177 under
Location8.1 MI E Ok C/L
RouteU.S. Route 270
CountyPottawatomie County
StateOklahoma
Coordinates35.38375, -97.00116
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85.1 US tons
Inventory rating51.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length367 ft (111.9 m)
Longest span97 ft (29.6 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,100 (2022)
Projected traffic25,760 by 2042
Trucks15%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed5 mi (8 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$2.7 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was U.S. 270 Ramp S-W over I-40 /U.S. 177 under built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1979.

What condition is U.S. 270 Ramp S-W over I-40 /U.S. 177 under in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2023.

How much traffic does U.S. 270 Ramp S-W over I-40 /U.S. 177 under carry?

About 16,100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is U.S. 270 Ramp S-W over I-40 /U.S. 177 under?

The structure is 367 ft (111.9 m) long with a longest span of 97 ft (29.6 m) and a deck 31 ft wide.

Who owns U.S. 270 Ramp S-W over I-40 /U.S. 177 under?

It is owned by the State Highway Agency.