US Bridges

W91-S710 W91-N710 over I 710 N710-W91 E91-N710

Poor

Los Angeles County, California · 07-LA-091-R11.70-LBCH · Structure no. 53 2143F

Built
1971
54 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
2,115 ft
15 main spans
Daily traffic
22,100
2019 count
Owner
State
State Highway Agency

About this bridge

W91-S710 W91-N710 over I 710 N710-W91 E91-N710 is a steel stringer/multi-beam or girder carrying W91-S710 W91-N710 over I 710 N710-W91 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 22,100 vehicles a day, roughly 2% of them trucks, projected to reach 51,337 by 2040. The structure is 2,115 ft (644.5 m) long and 52 ft wide.

Location

Open in Google Maps
CarriesW91-S710 W91-N710
CrossesI 710 N710-W91 E91-N710
Location07-LA-091-R11.70-LBCH
RouteState Highway 91
CountyLos Angeles County
StateCalifornia
Coordinates33.87629, -118.19331
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.9 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans15
Design loadHS 20 + Mod
Structure length2,115 ft (644.5 m)
Longest span155 ft (47.2 m)
Deck width52 ft (15.8 m)
Roadway width49 ft (15 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic22,100 (2019)
Projected traffic51,337 by 2040
Trucks2%
Lanes on structure3
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was W91-S710 W91-N710 over I 710 N710-W91 E91-N710 built?

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

What condition is W91-S710 W91-N710 over I 710 N710-W91 E91-N710 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does W91-S710 W91-N710 over I 710 N710-W91 E91-N710 carry?

About 22,100 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is W91-S710 W91-N710 over I 710 N710-W91 E91-N710?

The structure is 2,115 ft (644.5 m) long with a longest span of 155 ft (47.2 m) and a deck 52 ft wide.

Who owns W91-S710 W91-N710 over I 710 N710-W91 E91-N710?

It is owned by the State Highway Agency.