US Bridges

River RD over Green Valley Creek

Good

Sonoma County, California · 6.5 MI Intx With SR 116 · Structure no. 20C0156

Built
1970
55 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
337 ft
3 main spans
Daily traffic
12,700
2015 count
Owner
County
County Highway Agency

About this bridge

River RD over Green Valley Creek is a concrete continuous box beam or girders - multiple carrying River RD over Green Valley Creek in Sonoma County, California. It was built in 1970, so it is 55 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 12,700 vehicles a day, roughly 3% of them trucks, projected to reach 10,976 by 2046. The structure is 337 ft (102.7 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesRiver RD
CrossesGreen Valley Creek
Location6.5 MI Intx With SR 116
RouteCounty Highway 0
Coordinates38.50303, -122.90916
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating26.8 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+5 approach)
Design loadHS 20
Structure length337 ft (102.7 m)
Longest span80 ft (24.4 m)
Deck width33 ft (10 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,700 (2015)
Projected traffic10,976 by 2046
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was River RD over Green Valley Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is River RD over Green Valley Creek 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 October 2024.

How much traffic does River RD over Green Valley Creek carry?

About 12,700 vehicles per day (2015 count), of which roughly 3% are trucks.

How long is River RD over Green Valley Creek?

The structure is 337 ft (102.7 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.

Who owns River RD over Green Valley Creek?

It is owned by the County Highway Agency.