US Bridges

US Highway 101 NB over San Lorenzo Creek

Fair

Monterey County, California · 05-MON-101-R40.42 · Structure no. 44 0179R

Built
1968
57 years old
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
262 ft
4 main spans
Daily traffic
7,950
2009 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 NB over San Lorenzo Creek is a concrete continuous box beam or girders - multiple carrying US Highway 101 NB over San Lorenzo Creek in Monterey County, California. It was built in 1968, so it is 57 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 6 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 7,950 vehicles a day, projected to reach 13,429 by 2043. The structure is 262 ft (79.9 m) long and 34 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS Highway 101 NB
CrossesSan Lorenzo Creek
Location05-MON-101-R40.42
RouteU.S. Route 101
Coordinates36.20265, -121.12341
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.7 US tons
Inventory rating34.6 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length262 ft (79.9 m)
Longest span70 ft (21.3 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,950 (2009)
Projected traffic13,429 by 2043
Trucks0%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 US Highway 101 NB over San Lorenzo Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is US Highway 101 NB over San Lorenzo Creek 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 October 2023.

How much traffic does US Highway 101 NB over San Lorenzo Creek carry?

About 7,950 vehicles per day (2009 count).

How long is US Highway 101 NB over San Lorenzo Creek?

The structure is 262 ft (79.9 m) long with a longest span of 70 ft (21.3 m) and a deck 34 ft wide.

Who owns US Highway 101 NB over San Lorenzo Creek?

It is owned by the State Highway Agency.