US Bridges

S110-N&S405 Conn over Dominguez Channel

Fair

Los Angeles County, California · 07-LA-110-9.13-LA · Structure no. 53 2557H

Built
1985
40 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
309 ft
3 main spans
Daily traffic
29,950
2022 count
Owner
State
State Highway Agency

About this bridge

S110-N&S405 Conn over Dominguez Channel is a prestressed concrete continuous stringer/multi-beam or girder carrying S110-N&S405 Conn over Dominguez Channel in Los Angeles County, California. It was built in 1985, so it is 40 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 29,950 vehicles a day, roughly 6% of them trucks, projected to reach 36,418 by 2044. The structure is 309 ft (94.2 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS110-N&S405 Conn
CrossesDominguez Channel
Location07-LA-110-9.13-LA
RouteInterstate 110
CountyLos Angeles County
StateCalifornia
Coordinates33.86213, -118.28542
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length309 ft (94.2 m)
Longest span102 ft (31.1 m)
Deck width50 ft (15.2 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29,950 (2022)
Projected traffic36,418 by 2044
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 S110-N&S405 Conn over Dominguez Channel built?

It was built in 1985, making it 40 years old in 2025.

What condition is S110-N&S405 Conn over Dominguez Channel in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does S110-N&S405 Conn over Dominguez Channel carry?

About 29,950 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is S110-N&S405 Conn over Dominguez Channel?

The structure is 309 ft (94.2 m) long with a longest span of 102 ft (31.1 m) and a deck 50 ft wide.

Who owns S110-N&S405 Conn over Dominguez Channel?

It is owned by the State Highway Agency.