US Bridges

State Route 9 over Rincon Gulch

Good

Santa Cruz County, California · 05-SCR-009-1.97 · Structure no. 36 0037

Built
1930
95 years old
Condition
Good
inspected June 2024
Type
Tee Beam
Concrete
Length
161 ft
3 main spans
Daily traffic
4,700
2016 count
Owner
State
State Highway Agency

About this bridge

State Route 9 over Rincon Gulch is a concrete tee beam carrying State Route 9 over Rincon Gulch in Santa Cruz County, California. It was built in 1930, so it is 95 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,700 vehicles a day, roughly 1% of them trucks, projected to reach 6,200 by 2042. The structure is 161 ft (49.1 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesState Route 9
CrossesRincon Gulch
Location05-SCR-009-1.97
RouteState Highway 9
Coordinates37.00683, -122.04384
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating36.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length161 ft (49.1 m)
Longest span58 ft (17.7 m)
Deck width31 ft (9.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,700 (2016)
Projected traffic6,200 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 9 over Rincon Gulch built?

It was built in 1930, making it 95 years old in 2025.

What condition is State Route 9 over Rincon Gulch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does State Route 9 over Rincon Gulch carry?

About 4,700 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is State Route 9 over Rincon Gulch?

The structure is 161 ft (49.1 m) long with a longest span of 58 ft (17.7 m) and a deck 31 ft wide.

Who owns State Route 9 over Rincon Gulch?

It is owned by the State Highway Agency.