US Bridges

Bonny Doon RD over Lone Star Equipment RD

Fair

Santa Cruz County, California · 2.1 MI N/O SR 1 · Structure no. 36C0140

Built
1968
57 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
92 ft
3 main spans
Daily traffic
1,000
2015 count
Owner
County
County Highway Agency

About this bridge

Bonny Doon RD over Lone Star Equipment RD is a concrete continuous slab carrying Bonny Doon RD over Lone Star Equipment RD in Santa Cruz 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 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,500 by 2040. The structure is 92 ft (28 m) long and 41 ft wide. If it were closed, the detour would be 39.1 mi (63 km).

CarriesBonny Doon RD
CrossesLone Star Equipment RD
Location2.1 MI N/O SR 1
RouteCounty Highway 0
Coordinates37.02731, -122.16299
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length92 ft (28 m)
Longest span36 ft (11 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2015)
Projected traffic1,500 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed39.1 mi (63 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Bonny Doon RD over Lone Star Equipment RD built?

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

What condition is Bonny Doon RD over Lone Star Equipment 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 September 2023.

How much traffic does Bonny Doon RD over Lone Star Equipment RD carry?

About 1,000 vehicles per day (2015 count), of which roughly 10% are trucks.

How long is Bonny Doon RD over Lone Star Equipment RD?

The structure is 92 ft (28 m) long with a longest span of 36 ft (11 m) and a deck 41 ft wide.

Who owns Bonny Doon RD over Lone Star Equipment RD?

It is owned by the County Highway Agency.