US Bridges

N4020 (19th St) over Blackjack Creek

Good

Tulsa County, Oklahoma · 200FT S of Spring St. · Structure no. 320420000000000

Built
2016
9 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
100
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N4020 (19th St) over Blackjack Creek is a concrete culvert carrying N4020 (19th St) over Blackjack Creek in Tulsa County, Oklahoma. It was built in 2016, so it is 9 years old, younger than the Oklahoma average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2042. The structure is 34 ft (10.4 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesN4020 (19th St)
CrossesBlackjack Creek
Location200FT S of Spring St.
RouteCity Street N4020
CountyTulsa County
StateOklahoma
Coordinates36.36193, -95.84815
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width35 ft (10.7 m)
Roadway width28 ft (8.5 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 closed1.9 mi (3 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$2 million (2017 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was N4020 (19th St) over Blackjack Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is N4020 (19th St) over Blackjack Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does N4020 (19th St) over Blackjack Creek carry?

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

How long is N4020 (19th St) over Blackjack Creek?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 35 ft wide.

Who owns N4020 (19th St) over Blackjack Creek?

It is owned by the City or Municipal Highway Agency.