US Bridges

N3900 over Salt Creek

FairPosted for load

Okmulgee County, Oklahoma · Okmulgee Lake Park & SH56 · Structure no. 197630000000000

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
83 ft
1 main span
Daily traffic
200
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N3900 over Salt Creek is a steel stringer/multi-beam or girder carrying N3900 over Salt Creek in Okmulgee County, Oklahoma. It was built in 1970, so it is 55 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 200 vehicles a day, roughly 10% of them trucks, projected to reach 320 by 2042. The structure is 83 ft (25.3 m) long and 28 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesN3900
CrossesSalt Creek
LocationOkmulgee Lake Park & SH56
RouteCounty Highway N3900
Coordinates35.61549, -96.06071
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.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.5 US tons
Inventory rating27.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length83 ft (25.3 m)
Longest span83 ft (25.3 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 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 closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$460,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3900 over Salt Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is N3900 over Salt 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 August 2023.

How much traffic does N3900 over Salt Creek carry?

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

How long is N3900 over Salt Creek?

The structure is 83 ft (25.3 m) long with a longest span of 83 ft (25.3 m) and a deck 28 ft wide.

Who owns N3900 over Salt Creek?

It is owned by the City or Municipal Highway Agency.