US Bridges

N4020 (garnett Rd) over Mingo Creek

Good

Tulsa County, Oklahoma · 1S of Broken Arrow Expwy · Structure no. 323500000000000

Built
2008
17 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
29 ft
3 main spans
Daily traffic
8,000
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N4020 (garnett Rd) over Mingo Creek is a concrete culvert carrying N4020 (garnett Rd) over Mingo 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 8,000 vehicles a day, roughly 10% of them trucks, projected to reach 12,800 by 2042. The structure is 29 ft (8.7 m) long and 91 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesN4020 (garnett Rd)
CrossesMingo Creek
Location1S of Broken Arrow Expwy
RouteCity Street N4020
CountyTulsa County
StateOklahoma
Coordinates36.08011, -95.8509
Functional classUrban Collector

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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length29 ft (8.7 m)
Longest span9 ft (2.7 m)
Deck width91 ft (27.8 m)
Roadway width68 ft (20.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2022)
Projected traffic12,800 by 2042
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$225,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was N4020 (garnett Rd) over Mingo Creek built?

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

What condition is N4020 (garnett Rd) over Mingo 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 February 2023.

How much traffic does N4020 (garnett Rd) over Mingo Creek carry?

About 8,000 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is N4020 (garnett Rd) over Mingo Creek?

The structure is 29 ft (8.7 m) long with a longest span of 9 ft (2.7 m) and a deck 91 ft wide.

Who owns N4020 (garnett Rd) over Mingo Creek?

It is owned by the City or Municipal Highway Agency.