US Bridges

Route 101 NB over Mission RD-E10 On-Ramp

Fair

Los Angeles County, California · 07-LA-101-S1.28-LA · Structure no. 53 0555R

Built
1947
78 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete Continuous
Length
108 ft
3 main spans
Daily traffic
140,000
2021 count
Owner
State
State Highway Agency

About this bridge

Route 101 NB over Mission RD-E10 On-Ramp is a concrete continuous tee beam carrying Route 101 NB over Mission RD-E10 On-Ramp in Los Angeles County, California. It was built in 1947, so it is 78 years old, older 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 140,000 vehicles a day, roughly 6% of them trucks, projected to reach 216,264 by 2043. The structure is 108 ft (32.9 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRoute 101 NB
CrossesMission RD-E10 On-Ramp
Location07-LA-101-S1.28-LA
RouteU.S. Route 101
CountyLos Angeles County
StateCalifornia
Coordinates34.052, -118.22382
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating39.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length108 ft (32.9 m)
Longest span42 ft (12.8 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic140,000 (2021)
Projected traffic216,264 by 2043
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Route 101 NB over Mission RD-E10 On-Ramp built?

It was built in 1947, making it 78 years old in 2025.

What condition is Route 101 NB over Mission RD-E10 On-Ramp 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 2023.

How much traffic does Route 101 NB over Mission RD-E10 On-Ramp carry?

About 140,000 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is Route 101 NB over Mission RD-E10 On-Ramp?

The structure is 108 ft (32.9 m) long with a longest span of 42 ft (12.8 m) and a deck 30 ft wide.

Who owns Route 101 NB over Mission RD-E10 On-Ramp?

It is owned by the State Highway Agency.