Structure 103310000000000 · Tulsa County, OK

N3960 N Lewis over Flat Rock Creek

Carries N3960 N Lewis over Flat Rock Creek, 4200 N Lewis AVE.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT107 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 5/9 · sets the rating

107 ft end to end, longest span 42 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built194581 years old
Length106.6 ft32.5 m
Daily traffic13,174counted 2022
Last inspectedMarch 2023every 24 months

Location

StateOklahoma
CountyTulsa
Location4200 N Lewis AVE
CarriesN3960 N Lewis
CrossesFlat Rock Creek
Coordinates36.21486, -95.95831

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length106.6 ft (32.5 m)
Max Span42.0 ft (12.8 m)
Deck Width49.9 ft (15.2 m)
Deck Area494 sq m
Main Spans3
Year Built1945

Traffic

Avg Daily Traffic13,174 (2022)
Truck Traffic5%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number103310000000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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