US Bridges

Monte Vista Ter over Hillside

Fair

Sonoma County, California · In Monte Rio · Structure no. 20C0400

Built
1968
57 years old, rebuilt 2009
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
3 main spans
Daily traffic
200
2011 count
Owner
County
County Highway Agency

About this bridge

Monte Vista Ter over Hillside is a steel stringer/multi-beam or girder carrying Monte Vista Ter over Hillside in Sonoma County, California. It was built in 1968 and reconstructed in 2009, so it is 57 years old, older 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 273 by 2042. The structure is 58 ft (17.8 m) long and 9 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMonte Vista Ter
CrossesHillside
LocationIn Monte Rio
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.46923, -123.02769
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 inspectionMarch 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 alignment6: Equal to present minimum criteria
Operating rating69.7 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans3
Design loadUnknown
Structure length58 ft (17.8 m)
Longest span19 ft (5.9 m)
Deck width9 ft (2.8 m)
Roadway width12 ft (3.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2011)
Projected traffic273 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesOther
Detour if closed1.2 mi (2 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 Monte Vista Ter over Hillside built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2009.

What condition is Monte Vista Ter 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 Monte Vista Ter over Hillside carry?

About 200 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Monte Vista Ter over Hillside?

The structure is 58 ft (17.8 m) long with a longest span of 19 ft (5.9 m) and a deck 9 ft wide.

Who owns Monte Vista Ter over Hillside?

It is owned by the County Highway Agency.