US Bridges

Annapolis RD over Gualala Riv (clark Xing)

Fair

Sonoma County, California · Intrx Stwrt Pt-Skgssp RD · Structure no. 20C0141

Built
1920
105 years old
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
181 ft
1 main span
Daily traffic
800
2015 count
Owner
County
County Highway Agency

About this bridge

Annapolis RD over Gualala Riv (clark Xing) is a steel truss - thru carrying Annapolis RD over Gualala Riv (clark Xing) in Sonoma County, California. It was built in 1920, so it is 105 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 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 800 vehicles a day, roughly 5% of them trucks, projected to reach 367 by 2040. The structure is 181 ft (55.2 m) long and 16 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesAnnapolis RD
CrossesGualala Riv (clark Xing)
LocationIntrx Stwrt Pt-Skgssp RD
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.66533, -123.31301
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating31.7 US tons
Inventory rating19 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length181 ft (55.2 m)
Longest span180 ft (54.9 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deck15 ft (4.5 m)

Traffic and service

Average daily traffic800 (2015)
Projected traffic367 by 2040
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 Annapolis RD over Gualala Riv (clark Xing) built?

It was built in 1920, making it 105 years old in 2025.

What condition is Annapolis RD over Gualala Riv (clark Xing) 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 July 2023.

How much traffic does Annapolis RD over Gualala Riv (clark Xing) carry?

About 800 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Annapolis RD over Gualala Riv (clark Xing)?

The structure is 181 ft (55.2 m) long with a longest span of 180 ft (54.9 m) and a deck 16 ft wide.

Who owns Annapolis RD over Gualala Riv (clark Xing)?

It is owned by the County Highway Agency.