US Bridges

N3015 over Helm St. under

Good

Oklahoma County, Oklahoma · .2 Miles N. of SW 74th · Structure no. 281580000000000

Built
2007
18 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
117 ft
1 main span
Daily traffic
19,500
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

N3015 over Helm St. under is a prestressed concrete stringer/multi-beam or girder carrying N3015 over Helm St. under in Oklahoma County, Oklahoma. It was built in 2007, so it is 18 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 19,500 vehicles a day, roughly 25% of them trucks, projected to reach 31,200 by 2042. The structure is 117 ft (35.7 m) long and 78 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesN3015
CrossesHelm St. under
Location.2 Miles N. of SW 74th
RouteCity Street N3015
Coordinates35.39675, -97.62814
Functional classUrban Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length117 ft (35.7 m)
Longest span117 ft (35.7 m)
Deck width78 ft (23.8 m)
Roadway width73 ft (22.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,500 (2022)
Projected traffic31,200 by 2042
Trucks25%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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$1.8 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was N3015 over Helm St. under built?

It was built in 2007, making it 18 years old in 2025.

What condition is N3015 over Helm St. under 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 August 2024.

How much traffic does N3015 over Helm St. under carry?

About 19,500 vehicles per day (2022 count), of which roughly 25% are trucks.

How long is N3015 over Helm St. under?

The structure is 117 ft (35.7 m) long with a longest span of 117 ft (35.7 m) and a deck 78 ft wide.

Who owns N3015 over Helm St. under?

It is owned by the City or Municipal Highway Agency.