US Bridges

N3560 over Salt Creek

PoorClosed to traffic

Seminole County, Oklahoma · 2.7 S of Wolf · Structure no. 019380000000000

Built
1927
98 years old
Condition
Poor
inspected June 2023
Type
Truss - Thru
Steel
Length
313 ft
2 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3560 over Salt Creek is a steel truss - thru carrying N3560 over Salt Creek in Seminole County, Oklahoma. It was built in 1927, so it is 98 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 3 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: closed to all traffic.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 313 ft (95.3 m) long and 23 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesN3560
CrossesSalt Creek
Location2.7 S of Wolf
RouteCounty Highway N3560
Coordinates35.04772, -96.67
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans2 (+4 approach)
Design loadHS 20
Structure length313 ft (95.3 m)
Longest span84 ft (25.6 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$909,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3560 over Salt Creek built?

It was built in 1927, making it 98 years old in 2025.

What condition is N3560 over Salt 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 N3560 over Salt Creek carry?

About 100 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3560 over Salt Creek?

The structure is 313 ft (95.3 m) long with a longest span of 84 ft (25.6 m) and a deck 23 ft wide.

Who owns N3560 over Salt Creek?

It is owned by the County Highway Agency.