US Bridges

US Highway 101 SB over Sanborn RD

Fair

Monterey County, California · 05-MON-101-86.12-SAL · Structure no. 44 0120L

Built
1954
71 years old, rebuilt 1987
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Concrete
Length
92 ft
1 main span
Daily traffic
36,900
2009 count
Owner
State
State Highway Agency

About this bridge

US Highway 101 SB over Sanborn RD is a concrete box beam or girders - multiple carrying US Highway 101 SB over Sanborn RD in Monterey County, California. It was built in 1954 and reconstructed in 1987, so it is 71 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 36,900 vehicles a day, roughly 19% of them trucks, projected to reach 43,618 by 2046. The structure is 92 ft (28.1 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesUS Highway 101 SB
CrossesSanborn RD
Location05-MON-101-86.12-SAL
RouteU.S. Route 101
Coordinates36.66654, -121.62804
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110 US tons
Inventory rating68.9 US tons

Structure

MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length92 ft (28.1 m)
Longest span84 ft (25.6 m)
Deck width41 ft (12.4 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,900 (2009)
Projected traffic43,618 by 2046
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 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 SB over Sanborn RD built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1987.

What condition is US Highway 101 SB over Sanborn RD 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 May 2024.

How much traffic does US Highway 101 SB over Sanborn RD carry?

About 36,900 vehicles per day (2009 count), of which roughly 19% are trucks.

How long is US Highway 101 SB over Sanborn RD?

The structure is 92 ft (28.1 m) long with a longest span of 84 ft (25.6 m) and a deck 41 ft wide.

Who owns US Highway 101 SB over Sanborn RD?

It is owned by the State Highway Agency.