US Bridges

Keystone Rd. over U.S. 64 under

Fair

Pawnee County, Oklahoma · 19.5 MI E SH 99 · Structure no. 190830000000000

Built
1975
50 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
214 ft
2 main spans
Daily traffic
1,050
2023 count
Owner
State
State Highway Agency

About this bridge

Keystone Rd. over U.S. 64 under is a steel continuous stringer/multi-beam or girder carrying Keystone Rd. over U.S. 64 under in Pawnee County, Oklahoma. It was built in 1975, so it is 50 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 5 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 1,050 vehicles a day, roughly 14% of them trucks, projected to reach 1,300 by 2043. The structure is 214 ft (65.3 m) long and 45 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesKeystone Rd.
CrossesU.S. 64 under
Location19.5 MI E SH 99
RouteCounty Highway 0
CountyPawnee County
StateOklahoma
Coordinates36.20917, -96.2901
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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.3 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length214 ft (65.3 m)
Longest span107 ft (32.7 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,050 (2023)
Projected traffic1,300 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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$2.3 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Keystone Rd. over U.S. 64 under built?

It was built in 1975, making it 50 years old in 2025.

What condition is Keystone Rd. over U.S. 64 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 May 2024.

How much traffic does Keystone Rd. over U.S. 64 under carry?

About 1,050 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Keystone Rd. over U.S. 64 under?

The structure is 214 ft (65.3 m) long with a longest span of 107 ft (32.7 m) and a deck 45 ft wide.

Who owns Keystone Rd. over U.S. 64 under?

It is owned by the State Highway Agency.