US Bridges

Stwrt Pt-Skgg Sprg over South Fork Gualala River

Good

Sonoma County, California · 2.5 MI E of SH 1 · Structure no. 20C0221

Built
1984
41 years old
Condition
Good
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
272 ft
3 main spans
Daily traffic
300
2015 count
Owner
County
County Highway Agency

About this bridge

Stwrt Pt-Skgg Sprg over South Fork Gualala River is a concrete continuous box beam or girders - multiple carrying Stwrt Pt-Skgg Sprg over South Fork Gualala River in Sonoma County, California. It was built in 1984, so it is 41 years old, younger 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 300 vehicles a day, roughly 4% of them trucks, projected to reach 314 by 2040. The structure is 272 ft (82.9 m) long and 35 ft wide. If it were closed, the detour would be 23 mi (37 km).

CarriesStwrt Pt-Skgg Sprg
CrossesSouth Fork Gualala River
Location2.5 MI E of SH 1
RouteCounty Highway 0
Coordinates38.65138, -123.36451
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length272 ft (82.9 m)
Longest span110 ft (33.5 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2015)
Projected traffic314 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 Stwrt Pt-Skgg Sprg over South Fork Gualala River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Stwrt Pt-Skgg Sprg over South Fork Gualala River 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 June 2023.

How much traffic does Stwrt Pt-Skgg Sprg over South Fork Gualala River carry?

About 300 vehicles per day (2015 count), of which roughly 4% are trucks.

How long is Stwrt Pt-Skgg Sprg over South Fork Gualala River?

The structure is 272 ft (82.9 m) long with a longest span of 110 ft (33.5 m) and a deck 35 ft wide.

Who owns Stwrt Pt-Skgg Sprg over South Fork Gualala River?

It is owned by the County Highway Agency.