US Bridges

South 28th St. over I-40 under

Fair

Custer County, Oklahoma · 9.0 MI NE Washita C/L · Structure no. 144480000000000

Built
1959
66 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
172 ft
4 main spans
Daily traffic
1,400
2022 count
Owner
State
State Highway Agency

About this bridge

South 28th St. over I-40 under is a concrete continuous slab carrying South 28th St. over I-40 under in Custer County, Oklahoma. It was built in 1959, so it is 66 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 1,400 vehicles a day, roughly 33% of them trucks, projected to reach 2,240 by 2042. The structure is 172 ft (52.4 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSouth 28th St.
CrossesI-40 under
Location9.0 MI NE Washita C/L
RouteCounty Highway 3021
CountyCuster County
StateOklahoma
Coordinates35.49556, -98.99389
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36.6 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length172 ft (52.4 m)
Longest span55 ft (16.8 m)
Deck width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2022)
Projected traffic2,240 by 2042
Trucks33%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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$1.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was South 28th St. over I-40 under built?

It was built in 1959, making it 66 years old in 2025.

What condition is South 28th St. over I-40 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 September 2024.

How much traffic does South 28th St. over I-40 under carry?

About 1,400 vehicles per day (2022 count), of which roughly 33% are trucks.

How long is South 28th St. over I-40 under?

The structure is 172 ft (52.4 m) long with a longest span of 55 ft (16.8 m) and a deck 29 ft wide.

Who owns South 28th St. over I-40 under?

It is owned by the State Highway Agency.