US Bridges

N3960 N Lewis over Flat Rock Creek

Fair

Tulsa County, Oklahoma · 4200 N Lewis Ave · Structure no. 103310000000000

Built
1945
80 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
107 ft
3 main spans
Daily traffic
13,174
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N3960 N Lewis over Flat Rock Creek is a steel stringer/multi-beam or girder carrying N3960 N Lewis over Flat Rock Creek in Tulsa County, Oklahoma. It was built in 1945, so it is 80 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.

It carries about 13,174 vehicles a day, roughly 5% of them trucks, projected to reach 21,078 by 2042. The structure is 107 ft (32.5 m) long and 50 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesN3960 N Lewis
CrossesFlat Rock Creek
Location4200 N Lewis Ave
RouteCity Street N3960
CountyTulsa County
StateOklahoma
Coordinates36.21486, -95.95831
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length107 ft (32.5 m)
Longest span42 ft (12.8 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,174 (2022)
Projected traffic21,078 by 2042
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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$1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was N3960 N Lewis over Flat Rock Creek built?

It was built in 1945, making it 80 years old in 2025.

What condition is N3960 N Lewis over Flat Rock 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 March 2023.

How much traffic does N3960 N Lewis over Flat Rock Creek carry?

About 13,174 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is N3960 N Lewis over Flat Rock Creek?

The structure is 107 ft (32.5 m) long with a longest span of 42 ft (12.8 m) and a deck 50 ft wide.

Who owns N3960 N Lewis over Flat Rock Creek?

It is owned by the City or Municipal Highway Agency.