US Bridges

Neeley Road over Hillside

Fair

Sonoma County, California · 1 MI W SR 116 · Structure no. 20C0541

Built
2006
19 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
6 main spans
Daily traffic
3,000
2015 count
Owner
County
County Highway Agency

About this bridge

Neeley Road over Hillside is a steel stringer/multi-beam or girder carrying Neeley Road over Hillside in Sonoma County, California. It was built in 2006, so it is 19 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 3,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,750 by 2042. The structure is 120 ft (36.6 m) long and 9 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNeeley Road
CrossesHillside
Location1 MI W SR 116
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.49247, -123.00873
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating27.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans6
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span20 ft (6.1 m)
Deck width9 ft (2.7 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2015)
Projected traffic1,750 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed3.1 mi (5 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 Neeley Road over Hillside built?

It was built in 2006, making it 19 years old in 2025.

What condition is Neeley Road 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 November 2024.

How much traffic does Neeley Road over Hillside carry?

About 3,000 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is Neeley Road over Hillside?

The structure is 120 ft (36.6 m) long with a longest span of 20 ft (6.1 m) and a deck 9 ft wide.

Who owns Neeley Road over Hillside?

It is owned by the County Highway Agency.