US Bridges

N3020 over Skeleton Creek

FairPosted for load

Logan County, Oklahoma · 2.2S of SH51/SH74E · Structure no. 016280000000000

Built
1925
100 years old
Condition
Fair
inspected May 2023
Type
Truss - Thru
Steel
Length
172 ft
1 main span
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

N3020 over Skeleton Creek is a steel truss - thru carrying N3020 over Skeleton Creek in Logan County, Oklahoma. It was built in 1925, so it is 100 years old, older 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 15% of them trucks, projected to reach 160 by 2042. The structure is 172 ft (52.4 m) long and 19 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesN3020
CrossesSkeleton Creek
Location2.2S of SH51/SH74E
RouteCounty Highway N3020
CountyLogan County
StateOklahoma
Coordinates36.08303, -97.62169
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating37 US tons
Inventory rating22 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 15
Structure length172 ft (52.4 m)
Longest span98 ft (29.9 m)
Deck width19 ft (5.8 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic100 (2022)
Projected traffic160 by 2042
Trucks15%
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$659,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3020 over Skeleton Creek built?

It was built in 1925, making it 100 years old in 2025.

What condition is N3020 over Skeleton 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 May 2023.

How much traffic does N3020 over Skeleton Creek carry?

About 100 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is N3020 over Skeleton Creek?

The structure is 172 ft (52.4 m) long with a longest span of 98 ft (29.9 m) and a deck 19 ft wide.

Who owns N3020 over Skeleton Creek?

It is owned by the County Highway Agency.