US Bridges

Mehan RD.(N3400) over Little Stillwater Creek

Fair

Payne County, Oklahoma · Mehan RD & 56th ST .7S · Structure no. 273770000000000

Built
2003
22 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
64 ft
1 main span
Daily traffic
200
2022 count
Owner
County
County Highway Agency

About this bridge

Mehan RD.(N3400) over Little Stillwater Creek is a steel stringer/multi-beam or girder carrying Mehan RD.(N3400) over Little Stillwater Creek in Payne County, Oklahoma. It was built in 2003, so it is 22 years old, younger 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 320 by 2042. The structure is 64 ft (19.5 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesMehan RD.(N3400)
CrossesLittle Stillwater Creek
LocationMehan RD & 56th ST .7S
RouteCounty Highway N3400
CountyPayne County
StateOklahoma
Coordinates36.04808, -96.94457
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span63 ft (19.3 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2022)
Projected traffic320 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$468,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mehan RD.(N3400) over Little Stillwater Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Mehan RD.(N3400) over Little Stillwater Creek 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 2023.

How much traffic does Mehan RD.(N3400) over Little Stillwater Creek carry?

About 200 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Mehan RD.(N3400) over Little Stillwater Creek?

The structure is 64 ft (19.5 m) long with a longest span of 63 ft (19.3 m) and a deck 28 ft wide.

Who owns Mehan RD.(N3400) over Little Stillwater Creek?

It is owned by the County Highway Agency.