US Bridges

N Classen Blvd. over Belle Isle Oflow

Good

Oklahoma County, Oklahoma · .5N of NW 50 · Structure no. 296910000000000

Built
1998
27 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
11,500
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N Classen Blvd. over Belle Isle Oflow is a prestressed concrete stringer/multi-beam or girder carrying N Classen Blvd. over Belle Isle Oflow in Oklahoma County, Oklahoma. It was built in 1998, so it is 27 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 11,500 vehicles a day, roughly 5% of them trucks, projected to reach 18,400 by 2042. The structure is 52 ft (15.8 m) long and 70 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesN Classen Blvd.
CrossesBelle Isle Oflow
Location.5N of NW 50
RouteCity Street N3067
CountyOklahoma County
StateOklahoma
Coordinates35.52791, -97.53526
Functional classUrban Local

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span50 ft (15.2 m)
Deck width70 ft (21.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2022)
Projected traffic18,400 by 2042
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$697,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N Classen Blvd. over Belle Isle Oflow built?

It was built in 1998, making it 27 years old in 2025.

What condition is N Classen Blvd. over Belle Isle Oflow 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 October 2023.

How much traffic does N Classen Blvd. over Belle Isle Oflow carry?

About 11,500 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is N Classen Blvd. over Belle Isle Oflow?

The structure is 52 ft (15.8 m) long with a longest span of 50 ft (15.2 m) and a deck 70 ft wide.

Who owns N Classen Blvd. over Belle Isle Oflow?

It is owned by the City or Municipal Highway Agency.