US Bridges

Fulton RD over Mark West Creek

Fair

Sonoma County, California · 0.2 MI N of US HWY 101 · Structure no. 20C0341

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
158 ft
3 main spans
Daily traffic
14,650
2015 count
Owner
County
County Highway Agency

About this bridge

Fulton RD over Mark West Creek is a concrete continuous box beam or girders - multiple carrying Fulton RD over Mark West Creek in Sonoma County, California. It was built in 1971, so it is 54 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 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 14,650 vehicles a day, roughly 4% of them trucks, projected to reach 26,630 by 2040. The structure is 158 ft (48.2 m) long and 41 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesFulton RD
CrossesMark West Creek
Location0.2 MI N of US HWY 101
RouteCounty Highway 0
CountySonoma County
StateCalifornia
Coordinates38.50899, -122.76985
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length158 ft (48.2 m)
Longest span62 ft (18.9 m)
Deck width41 ft (12.4 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,650 (2015)
Projected traffic26,630 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Fulton RD over Mark West Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Fulton RD over Mark West Creek 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 June 2023.

How much traffic does Fulton RD over Mark West Creek carry?

About 14,650 vehicles per day (2015 count), of which roughly 4% are trucks.

How long is Fulton RD over Mark West Creek?

The structure is 158 ft (48.2 m) long with a longest span of 62 ft (18.9 m) and a deck 41 ft wide.

Who owns Fulton RD over Mark West Creek?

It is owned by the County Highway Agency.