US Bridges

State Route 162 over Little Slough

Good

Mendocino County, California · 01-MEN-162-32.14 · Structure no. 10 0106

Built
1958
67 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
2,200
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 162 over Little Slough is a prestressed concrete stringer/multi-beam or girder carrying State Route 162 over Little Slough in Mendocino County, California. It was built in 1958, so it is 67 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 2,200 vehicles a day, roughly 12% of them trucks, projected to reach 3,079 by 2045. The structure is 50 ft (15.3 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesState Route 162
CrossesLittle Slough
Location01-MEN-162-32.14
RouteState Highway 162
Coordinates39.8167, -123.22144
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating32.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length50 ft (15.3 m)
Longest span49 ft (14.9 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,200 (2009)
Projected traffic3,079 by 2045
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 162 over Little Slough built?

It was built in 1958, making it 67 years old in 2025.

What condition is State Route 162 over Little 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 May 2023.

How much traffic does State Route 162 over Little Slough carry?

About 2,200 vehicles per day (2009 count), of which roughly 12% are trucks.

How long is State Route 162 over Little Slough?

The structure is 50 ft (15.3 m) long with a longest span of 49 ft (14.9 m) and a deck 25 ft wide.

Who owns State Route 162 over Little Slough?

It is owned by the State Highway Agency.