US Bridges

Mar Monte Avenue over State Route 1

Fair

Santa Cruz County, California · 05-SCR-001-R6.68 · Structure no. 36 0093

Built
1974
51 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
299 ft
2 main spans
Daily traffic
2,400
1998 count
Owner
State
State Highway Agency

About this bridge

Mar Monte Avenue over State Route 1 is a prestressed concrete continuous box beam or girders - multiple carrying Mar Monte Avenue over State Route 1 in Santa Cruz County, California. It was built in 1974, so it is 51 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 2,400 vehicles a day, roughly 1% of them trucks, projected to reach 8,722 by 2045. The structure is 299 ft (91.2 m) long and 47 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesMar Monte Avenue
CrossesState Route 1
Location05-SCR-001-R6.68
RouteCounty Highway 0
CountySanta Cruz County
StateCalifornia
Coordinates36.94932, -121.85125
Functional classUrban Collector

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 inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.9 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length299 ft (91.2 m)
Longest span153 ft (46.7 m)
Deck width47 ft (14.3 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (1998)
Projected traffic8,722 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

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 Mar Monte Avenue over State Route 1 built?

It was built in 1974, making it 51 years old in 2025.

What condition is Mar Monte Avenue over State Route 1 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 November 2023.

How much traffic does Mar Monte Avenue over State Route 1 carry?

About 2,400 vehicles per day (1998 count), of which roughly 1% are trucks.

How long is Mar Monte Avenue over State Route 1?

The structure is 299 ft (91.2 m) long with a longest span of 153 ft (46.7 m) and a deck 47 ft wide.

Who owns Mar Monte Avenue over State Route 1?

It is owned by the State Highway Agency.