US Bridges

State Route 183 over Espinosa Slough

Fair

Monterey County, California · 05-MON-183-R7.30 · Structure no. 44 0023

Built
1978
47 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
72 ft
3 main spans
Daily traffic
19,650
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 183 over Espinosa Slough is a concrete continuous slab carrying State Route 183 over Espinosa Slough in Monterey County, California. It was built in 1978, so it is 47 years old, younger 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 19,650 vehicles a day, roughly 16% of them trucks, projected to reach 20,103 by 2044. The structure is 72 ft (21.9 m) long and 44 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesState Route 183
CrossesEspinosa Slough
Location05-MON-183-R7.30
RouteState Highway 183
CountyMonterey County
StateCalifornia
Coordinates36.73997, -121.73864
Functional classRural Minor Arterial

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.7 US tons
Inventory rating57.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length72 ft (21.9 m)
Longest span28 ft (8.5 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,650 (2009)
Projected traffic20,103 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 183 over Espinosa Slough built?

It was built in 1978, making it 47 years old in 2025.

What condition is State Route 183 over Espinosa Slough 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 August 2024.

How much traffic does State Route 183 over Espinosa Slough carry?

About 19,650 vehicles per day (2009 count), of which roughly 16% are trucks.

How long is State Route 183 over Espinosa Slough?

The structure is 72 ft (21.9 m) long with a longest span of 28 ft (8.5 m) and a deck 44 ft wide.

Who owns State Route 183 over Espinosa Slough?

It is owned by the State Highway Agency.