US Bridges

N101-W380 Connectr over I 380 US 101 7th Conn

Poor

San Mateo County, California · 04-SM-101-R20.52 · Structure no. 35 0262G

Built
1976
49 years old
Condition
Poor
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
2,339 ft
4 main spans
Daily traffic
43,500
1998 count
Owner
State
State Highway Agency

About this bridge

N101-W380 Connectr over I 380 US 101 7th Conn is a prestressed concrete continuous box beam or girders - multiple carrying N101-W380 Connectr over I 380 US 101 7th Conn in San Mateo County, California. It was built in 1976, so it is 49 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 43,500 vehicles a day, roughly 4% of them trucks, projected to reach 28,256 by 2040. The structure is 2,339 ft (712.8 m) long and 43 ft wide.

CarriesN101-W380 Connectr
CrossesI 380 US 101 7th Conn
Location04-SM-101-R20.52
RouteU.S. Route 101
Coordinates37.63203, -122.4023
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 protection9 ExcellentNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4 (+15 approach)
Design loadHS 20 + Mod
Structure length2,339 ft (712.8 m)
Longest span188 ft (57.3 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,500 (1998)
Projected traffic28,256 by 2040
Trucks4%
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N101-W380 Connectr over I 380 US 101 7th Conn built?

It was built in 1976, making it 49 years old in 2025.

What condition is N101-W380 Connectr over I 380 US 101 7th Conn 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 April 2023.

How much traffic does N101-W380 Connectr over I 380 US 101 7th Conn carry?

About 43,500 vehicles per day (1998 count), of which roughly 4% are trucks.

How long is N101-W380 Connectr over I 380 US 101 7th Conn?

The structure is 2,339 ft (712.8 m) long with a longest span of 188 ft (57.3 m) and a deck 43 ft wide.

Who owns N101-W380 Connectr over I 380 US 101 7th Conn?

It is owned by the State Highway Agency.