US Bridges

Union Rd. (N3390) over Little Stillwater Creek

Fair

Payne County, Oklahoma · Richmond\union RD.7S · Structure no. 251970000000000

Built
1997
28 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
29 ft
1 main span
Daily traffic
75
2022 count
Owner
County
County Highway Agency

About this bridge

Union Rd. (N3390) over Little Stillwater Creek is a steel stringer/multi-beam or girder carrying Union Rd. (N3390) over Little Stillwater Creek in Payne County, Oklahoma. It was built in 1997, so it is 28 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 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 75 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2042. The structure is 29 ft (8.9 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesUnion Rd. (N3390)
CrossesLittle Stillwater Creek
LocationRichmond\union RD.7S
RouteCounty Highway N3390
CountyPayne County
StateOklahoma
Coordinates36.16466, -96.96169
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating101 US tons
Inventory rating61 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length29 ft (8.9 m)
Longest span28 ft (8.6 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2022)
Projected traffic120 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$236,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Union Rd. (N3390) over Little Stillwater Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Union Rd. (N3390) 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 Union Rd. (N3390) over Little Stillwater Creek carry?

About 75 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Union Rd. (N3390) over Little Stillwater Creek?

The structure is 29 ft (8.9 m) long with a longest span of 28 ft (8.6 m) and a deck 26 ft wide.

Who owns Union Rd. (N3390) over Little Stillwater Creek?

It is owned by the County Highway Agency.