US Bridges

Pacific Avenue over Hillside

Fair

Sonoma County, California · In Jenner · Structure no. 20C0588

Built
2015
10 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
2 main spans
Daily traffic
100
2011 count
Owner
County
County Highway Agency

About this bridge

Pacific Avenue over Hillside is a steel stringer/multi-beam or girder carrying Pacific Avenue over Hillside in Sonoma County, California. It was built in 2015, so it is 10 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 5 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 100 vehicles a day, projected to reach 106 by 2046. The structure is 39 ft (11.8 m) long and 11 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesPacific Avenue
CrossesHillside
LocationIn Jenner
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.45075, -123.11832
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadHS 20
Structure length39 ft (11.8 m)
Longest span18 ft (5.6 m)
Deck width11 ft (3.3 m)
Roadway width16 ft (5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2011)
Projected traffic106 by 2046
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesOther
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pacific Avenue over Hillside built?

It was built in 2015, making it 10 years old in 2025.

What condition is Pacific Avenue over Hillside 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 March 2024.

How much traffic does Pacific Avenue over Hillside carry?

About 100 vehicles per day (2011 count).

How long is Pacific Avenue over Hillside?

The structure is 39 ft (11.8 m) long with a longest span of 18 ft (5.6 m) and a deck 11 ft wide.

Who owns Pacific Avenue over Hillside?

It is owned by the County Highway Agency.