US Bridges

S.H. 20 over Blackjack Creek

Good

Tulsa County, Oklahoma · .1MI.W. of Jct. U.S.169 · Structure no. 285350000000000

Built
2008
17 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete
Length
95 ft
3 main spans
Daily traffic
8,800
2022 count
Owner
State
State Highway Agency

About this bridge

S.H. 20 over Blackjack Creek is a concrete slab carrying S.H. 20 over Blackjack Creek in Tulsa County, Oklahoma. It was built in 2008, so it is 17 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 8,800 vehicles a day, roughly 10% of them trucks, projected to reach 14,080 by 2042. The structure is 95 ft (29 m) long and 68 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesS.H. 20
CrossesBlackjack Creek
Location.1MI.W. of Jct. U.S.169
RouteState Highway 20
CountyTulsa County
StateOklahoma
Coordinates36.36445, -95.82802
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating33.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length95 ft (29 m)
Longest span45 ft (13.7 m)
Deck width68 ft (20.6 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,800 (2022)
Projected traffic14,080 by 2042
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$2.6 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S.H. 20 over Blackjack Creek built?

It was built in 2008, making it 17 years old in 2025.

What condition is S.H. 20 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 September 2024.

How much traffic does S.H. 20 over Blackjack Creek carry?

About 8,800 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is S.H. 20 over Blackjack Creek?

The structure is 95 ft (29 m) long with a longest span of 45 ft (13.7 m) and a deck 68 ft wide.

Who owns S.H. 20 over Blackjack Creek?

It is owned by the State Highway Agency.