US Bridges

56th ST (E0660) over Stillwater Creek

Good

Payne County, Oklahoma · .2W 1N .8W of Mehan · Structure no. 270620000000000

Built
2004
21 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
148 ft
3 main spans
Daily traffic
50
2022 count
Owner
County
County Highway Agency

About this bridge

56th ST (E0660) over Stillwater Creek is a prestressed concrete stringer/multi-beam or girder carrying 56th ST (E0660) over Stillwater Creek in Payne County, Oklahoma. It was built in 2004, so it is 21 years old, younger 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 80 by 2042. The structure is 148 ft (45 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries56th ST (E0660)
CrossesStillwater Creek
Location.2W 1N .8W of Mehan
RouteCounty Highway E0660
CountyPayne County
StateOklahoma
Coordinates36.0582, -96.95856
Functional classRural Local

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78 US tons
Inventory rating43 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length148 ft (45 m)
Longest span75 ft (22.9 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2022)
Projected traffic80 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$878,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 56th ST (E0660) over Stillwater Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is 56th ST (E0660) over Stillwater Creek 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 September 2023.

How much traffic does 56th ST (E0660) over Stillwater Creek carry?

About 50 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is 56th ST (E0660) over Stillwater Creek?

The structure is 148 ft (45 m) long with a longest span of 75 ft (22.9 m) and a deck 29 ft wide.

Who owns 56th ST (E0660) over Stillwater Creek?

It is owned by the County Highway Agency.