US Bridges

N3050 over Sullivan Creek

FairPosted for load

Grant County, Oklahoma · 5N 4.7E of Renfrow · Structure no. 252240000000000

Built
1997
28 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Steel
Length
78 ft
1 main span
Daily traffic
25
2022 count
Owner
County
County Highway Agency

About this bridge

N3050 over Sullivan Creek is a steel box beam or girders - multiple carrying N3050 over Sullivan Creek in Grant 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. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2042. The structure is 78 ft (23.7 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN3050
CrossesSullivan Creek
Location5N 4.7E of Renfrow
RouteCounty Highway N3050
CountyGrant County
StateOklahoma
Coordinates36.99498, -97.57022
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23 US tons
Inventory rating13 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length78 ft (23.7 m)
Longest span77 ft (23.5 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2022)
Projected traffic40 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$445,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N3050 over Sullivan Creek built?

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

What condition is N3050 over Sullivan 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 July 2024.

How much traffic does N3050 over Sullivan Creek carry?

About 25 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N3050 over Sullivan Creek?

The structure is 78 ft (23.7 m) long with a longest span of 77 ft (23.5 m) and a deck 27 ft wide.

Who owns N3050 over Sullivan Creek?

It is owned by the County Highway Agency.