US Bridges

N3280 over Stillwater Creek

PoorPosted for load

Payne County, Oklahoma · Cottonwd & Mcelroy .2S · Structure no. 097830000000000

Built
1941
84 years old
Condition
Poor
inspected June 2023
Type
Truss - Thru
Steel
Length
52 ft
1 main span
Daily traffic
137
2022 count
Owner
County
County Highway Agency

About this bridge

N3280 over Stillwater Creek is a steel truss - thru carrying N3280 over Stillwater Creek in Payne County, Oklahoma. It was built in 1941, so it is 84 years old, older than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 137 vehicles a day, roughly 15% of them trucks, projected to reach 219 by 2042. The structure is 52 ft (15.9 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesN3280
CrossesStillwater Creek
LocationCottonwd & Mcelroy .2S
RouteCounty Highway 6028C
Coordinates36.12701, -97.15844
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating20.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length52 ft (15.9 m)
Longest span52 ft (15.8 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic137 (2022)
Projected traffic219 by 2042
Trucks15%
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$281,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3280 over Stillwater Creek built?

It was built in 1941, making it 84 years old in 2025.

What condition is N3280 over Stillwater Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does N3280 over Stillwater Creek carry?

About 137 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3280 over Stillwater Creek?

The structure is 52 ft (15.9 m) long with a longest span of 52 ft (15.8 m) and a deck 18 ft wide.

Who owns N3280 over Stillwater Creek?

It is owned by the County Highway Agency.