US Bridges

N&S101-E37 Connctr over S Novato Bl N101 & Nwprr

Good

Marin County, California · 04-MRN-101-18.96-NVTO · Structure no. 27 0108H

Built
1964
61 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
727 ft
8 main spans
Daily traffic
14,500
1998 count
Owner
State
State Highway Agency

About this bridge

N&S101-E37 Connctr over S Novato Bl N101 & Nwprr is a concrete continuous box beam or girders - multiple carrying N&S101-E37 Connctr over S Novato Bl N101 & Nwprr in Marin County, California. It was built in 1964, so it is 61 years old, older 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 14,500 vehicles a day, roughly 4% of them trucks, projected to reach 33,802 by 2041. The structure is 727 ft (221.6 m) long and 46 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesN&S101-E37 Connctr
CrossesS Novato Bl N101 & Nwprr
Location04-MRN-101-18.96-NVTO
RouteState Highway 101
Coordinates38.07974, -122.54438
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.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating72.1 US tons
Inventory rating36.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length727 ft (221.6 m)
Longest span106 ft (32.3 m)
Deck width46 ft (14 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (1998)
Projected traffic33,802 by 2041
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed9.9 mi (16 km)
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 N&S101-E37 Connctr over S Novato Bl N101 & Nwprr built?

It was built in 1964, making it 61 years old in 2025.

What condition is N&S101-E37 Connctr over S Novato Bl N101 & Nwprr 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 N&S101-E37 Connctr over S Novato Bl N101 & Nwprr carry?

About 14,500 vehicles per day (1998 count), of which roughly 4% are trucks.

How long is N&S101-E37 Connctr over S Novato Bl N101 & Nwprr?

The structure is 727 ft (221.6 m) long with a longest span of 106 ft (32.3 m) and a deck 46 ft wide.

Who owns N&S101-E37 Connctr over S Novato Bl N101 & Nwprr?

It is owned by the State Highway Agency.