US Bridges

ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710

Good

Los Angeles County, California · 07-LA-091-R11.82-LBCH · Structure no. 53 2144K

Built
1971
54 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
1,038 ft
10 main spans
Daily traffic
13,400
2019 count
Owner
State
State Highway Agency

About this bridge

ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710 is a prestressed concrete box beam or girders - multiple carrying ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710 in Los Angeles County, California. It was built in 1971, so it is 54 years old, younger than the California average of 54.8 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 13,400 vehicles a day, roughly 1% of them trucks, projected to reach 15,087 by 2040. The structure is 1,038 ft (316.4 m) long and 26 ft wide.

Location

Open in Google Maps
CarriesATLANTIC-W91 Onrmp
CrossesLos Angeles Riv E91-N710
Location07-LA-091-R11.82-LBCH
RouteState Highway 91
CountyLos Angeles County
StateCalifornia
Coordinates33.87656, -118.19118
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating27.4 US tons
Inventory rating17.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length1,038 ft (316.4 m)
Longest span119 ft (36.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic13,400 (2019)
Projected traffic15,087 by 2040
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710 built?

It was built in 1971, making it 54 years old in 2025.

What condition is ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710 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 June 2023.

How much traffic does ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710 carry?

About 13,400 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710?

The structure is 1,038 ft (316.4 m) long with a longest span of 119 ft (36.4 m) and a deck 26 ft wide.

Who owns ATLANTIC-W91 Onrmp over Los Angeles Riv E91-N710?

It is owned by the State Highway Agency.