US Bridges

State Route 129 over Salsipuedes Creek

Poor

Santa Cruz County, California · 05-SCR-129-0.56 · Structure no. 36 0034

Built
1938
87 years old, rebuilt 1990
Condition
Poor
inspected June 2024
Type
Tee Beam
Concrete Continuous
Length
102 ft
3 main spans
Daily traffic
10,000
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 129 over Salsipuedes Creek is a concrete continuous tee beam carrying State Route 129 over Salsipuedes Creek in Santa Cruz County, California. It was built in 1938 and reconstructed in 1990, so it is 87 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 10,000 vehicles a day, projected to reach 11,800 by 2042. The structure is 102 ft (31.1 m) long and 56 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesState Route 129
CrossesSalsipuedes Creek
Location05-SCR-129-0.56
RouteState Highway 129
Coordinates36.91241, -121.74544
Functional classUrban Other Principal Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length102 ft (31.1 m)
Longest span40 ft (12.2 m)
Deck width56 ft (17.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,000 (2017)
Projected traffic11,800 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$895,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 129 over Salsipuedes Creek built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1990.

What condition is State Route 129 over Salsipuedes Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does State Route 129 over Salsipuedes Creek carry?

About 10,000 vehicles per day (2017 count).

How long is State Route 129 over Salsipuedes Creek?

The structure is 102 ft (31.1 m) long with a longest span of 40 ft (12.2 m) and a deck 56 ft wide.

Who owns State Route 129 over Salsipuedes Creek?

It is owned by the State Highway Agency.