US Bridges

Haro ST over Tembladero Slough

Good

Monterey County, California · 0.2 MI S SR 183 · Structure no. 44C0048

Built
1966
59 years old
Condition
Good
inspected September 2021
Type
Slab
Concrete Continuous
Length
77 ft
3 main spans
Daily traffic
200
2013 count
Owner
County
County Highway Agency

About this bridge

Haro ST over Tembladero Slough is a concrete continuous slab carrying Haro ST over Tembladero Slough in Monterey County, California. It was built in 1966, so it is 59 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 200 vehicles a day, roughly 7% of them trucks, projected to reach 407 by 2038. The structure is 77 ft (23.5 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesHaro ST
CrossesTembladero Slough
Location0.2 MI S SR 183
RouteCounty Highway 0
Coordinates36.75948, -121.75446
Functional classRural Local

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 protection9 ExcellentNo problems noted.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length77 ft (23.5 m)
Longest span30 ft (9.1 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2013)
Projected traffic407 by 2038
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Haro ST over Tembladero Slough built?

It was built in 1966, making it 59 years old in 2025.

What condition is Haro ST over Tembladero Slough 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 September 2021.

How much traffic does Haro ST over Tembladero Slough carry?

About 200 vehicles per day (2013 count), of which roughly 7% are trucks.

How long is Haro ST over Tembladero Slough?

The structure is 77 ft (23.5 m) long with a longest span of 30 ft (9.1 m) and a deck 30 ft wide.

Who owns Haro ST over Tembladero Slough?

It is owned by the County Highway Agency.