US Bridges

State Route 1 NB over W156-S1 Connector Ramp

Fair

Monterey County, California · 05-MON-001-R90.93 · Structure no. 44 0218R

Built
1976
49 years old
Condition
Fair
inspected August 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
500 ft
3 main spans
Daily traffic
23,500
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 NB over W156-S1 Connector Ramp is a prestressed concrete continuous box beam or girders - multiple carrying State Route 1 NB over W156-S1 Connector Ramp in Monterey County, California. It was built in 1976, so it is 49 years old, younger 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 23,500 vehicles a day, roughly 8% of them trucks, projected to reach 26,387 by 2043. The structure is 500 ft (152.4 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesState Route 1 NB
CrossesW156-S1 Connector Ramp
Location05-MON-001-R90.93
RouteState Highway 1
CountyMonterey County
StateCalifornia
Coordinates36.75228, -121.7659
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating52.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length500 ft (152.4 m)
Longest span190 ft (57.9 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,500 (2009)
Projected traffic26,387 by 2043
Trucks8%
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 NetworkNon-Interstate 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 State Route 1 NB over W156-S1 Connector Ramp built?

It was built in 1976, making it 49 years old in 2025.

What condition is State Route 1 NB over W156-S1 Connector Ramp 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 August 2023.

How much traffic does State Route 1 NB over W156-S1 Connector Ramp carry?

About 23,500 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is State Route 1 NB over W156-S1 Connector Ramp?

The structure is 500 ft (152.4 m) long with a longest span of 190 ft (57.9 m) and a deck 41 ft wide.

Who owns State Route 1 NB over W156-S1 Connector Ramp?

It is owned by the State Highway Agency.