US Bridges

US Highway 101 NB over Jolon Road

Good

Monterey County, California · 05-MON-101-R9.67 · Structure no. 44 0009R

Built
1964
61 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
176 ft
3 main spans
Daily traffic
7,150
2010 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 NB over Jolon Road is a concrete continuous box beam or girders - multiple carrying US Highway 101 NB over Jolon Road in Monterey 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 7,150 vehicles a day, roughly 19% of them trucks, projected to reach 14,262 by 2043. The structure is 176 ft (53.5 m) long and 40 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesUS Highway 101 NB
CrossesJolon Road
Location05-MON-101-R9.67
RouteU.S. Route 101
Coordinates35.87394, -120.83535
Functional classRural Principal Arterial - Other

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating35.1 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length176 ft (53.5 m)
Longest span80 ft (24.3 m)
Deck width40 ft (12.1 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,150 (2010)
Projected traffic14,262 by 2043
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed16.8 mi (27 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US Highway 101 NB over Jolon Road built?

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

What condition is US Highway 101 NB over Jolon Road 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 October 2023.

How much traffic does US Highway 101 NB over Jolon Road carry?

About 7,150 vehicles per day (2010 count), of which roughly 19% are trucks.

How long is US Highway 101 NB over Jolon Road?

The structure is 176 ft (53.5 m) long with a longest span of 80 ft (24.3 m) and a deck 40 ft wide.

Who owns US Highway 101 NB over Jolon Road?

It is owned by the State Highway Agency.