US Bridges

State Route 156 over US HWY 101 (@pm 3.02)

Fair

San Benito County, California · 05-SBT-156-0.01 · Structure no. 43 0031E

Built
1958
67 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
326 ft
6 main spans
Daily traffic
13,000
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 156 over US HWY 101 (@pm 3.02) is a steel stringer/multi-beam or girder carrying State Route 156 over US HWY 101 (@pm 3.02) in San Benito County, California. It was built in 1958, so it is 67 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 13,000 vehicles a day, roughly 16% of them trucks, projected to reach 15,426 by 2042. The structure is 326 ft (99.3 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesState Route 156
CrossesUS HWY 101 (@pm 3.02)
Location05-SBT-156-0.01
RouteState Highway 156
Coordinates36.86218, -121.58012
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
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 alignment8: Equal to present desirable criteria
Operating rating72.9 US tons
Inventory rating43.5 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length326 ft (99.3 m)
Longest span69 ft (20.9 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2009)
Projected traffic15,426 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.8 mi (19 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 State Route 156 over US HWY 101 (@pm 3.02) built?

It was built in 1958, making it 67 years old in 2025.

What condition is State Route 156 over US HWY 101 (@pm 3.02) 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 April 2024.

How much traffic does State Route 156 over US HWY 101 (@pm 3.02) carry?

About 13,000 vehicles per day (2009 count), of which roughly 16% are trucks.

How long is State Route 156 over US HWY 101 (@pm 3.02)?

The structure is 326 ft (99.3 m) long with a longest span of 69 ft (20.9 m) and a deck 31 ft wide.

Who owns State Route 156 over US HWY 101 (@pm 3.02)?

It is owned by the State Highway Agency.