US Bridges

N4030 over Blackjack Creek Trib.

FairPosted for load

Tulsa County, Oklahoma · 129 E Ave .7MI S 156 ST N · Structure no. 170580000000000

Built
1968
57 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
3,099
2024 count
Owner
County
County Highway Agency

About this bridge

N4030 over Blackjack Creek Trib. is a steel stringer/multi-beam or girder carrying N4030 over Blackjack Creek Trib. in Tulsa County, Oklahoma. It was built in 1968, so it is 57 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 3,099 vehicles a day, roughly 10% of them trucks, projected to reach 4,959 by 2044. The structure is 30 ft (9.1 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesN4030
CrossesBlackjack Creek Trib.
Location129 E Ave .7MI S 156 ST N
RouteCounty Highway N4030
CountyTulsa County
StateOklahoma
Coordinates36.37065, -95.83019
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 evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating32 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span26 ft (7.9 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,099 (2024)
Projected traffic4,959 by 2044
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$261,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N4030 over Blackjack Creek Trib. built?

It was built in 1968, making it 57 years old in 2025.

What condition is N4030 over Blackjack Creek Trib. 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 N4030 over Blackjack Creek Trib. carry?

About 3,099 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is N4030 over Blackjack Creek Trib.?

The structure is 30 ft (9.1 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.

Who owns N4030 over Blackjack Creek Trib.?

It is owned by the County Highway Agency.