US Bridges

State Route 236 over Boulder Creek

Fair

Santa Cruz County, California · 05-SCR-236-2.86 · Structure no. 36 0007

Built
1921
104 years old
Condition
Fair
inspected June 2024
Type
Tee Beam
Concrete
Length
90 ft
3 main spans
Daily traffic
1,350
2016 count
Owner
State
State Highway Agency

About this bridge

State Route 236 over Boulder Creek is a concrete tee beam carrying State Route 236 over Boulder Creek in Santa Cruz County, California. It was built in 1921, so it is 104 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 1,350 vehicles a day, projected to reach 2,600 by 2042. The structure is 90 ft (27.4 m) long and 24 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesState Route 236
CrossesBoulder Creek
Location05-SCR-236-2.86
RouteState Highway 236
CountySanta Cruz County
StateCalifornia
Coordinates37.14834, -122.15749
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating35.1 US tons
Inventory rating21.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length90 ft (27.4 m)
Longest span38 ft (11.6 m)
Deck width24 ft (7.2 m)
Roadway width21 ft (6.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,350 (2016)
Projected traffic2,600 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 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 236 over Boulder Creek built?

It was built in 1921, making it 104 years old in 2025.

What condition is State Route 236 over Boulder Creek 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 June 2024.

How much traffic does State Route 236 over Boulder Creek carry?

About 1,350 vehicles per day (2016 count).

How long is State Route 236 over Boulder Creek?

The structure is 90 ft (27.4 m) long with a longest span of 38 ft (11.6 m) and a deck 24 ft wide.

Who owns State Route 236 over Boulder Creek?

It is owned by the State Highway Agency.