US Bridges

Rg State Park Road over Russian Gulch

Fair

Mendocino County, California · Russian Gulch State Park · Structure no. 10P0005

Built
1953
72 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
15,000
1998 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Rg State Park Road over Russian Gulch is a concrete continuous slab carrying Rg State Park Road over Russian Gulch in Mendocino County, California. It was built in 1953, so it is 72 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 15,000 vehicles a day, roughly 1% of them trucks, projected to reach 21,808 by 2041. The structure is 31 ft (9.5 m) long and 17 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRg State Park Road
CrossesRussian Gulch
LocationRussian Gulch State Park
RouteState Lands Road 0
CountyMendocino County
StateCalifornia
Coordinates39.33019, -123.80201
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34.6 US tons
Inventory rating20.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length31 ft (9.5 m)
Longest span20 ft (6.1 m)
Deck width17 ft (5.3 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,000 (1998)
Projected traffic21,808 by 2041
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation 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 Rg State Park Road over Russian Gulch built?

It was built in 1953, making it 72 years old in 2025.

What condition is Rg State Park Road over Russian Gulch 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 May 2023.

How much traffic does Rg State Park Road over Russian Gulch carry?

About 15,000 vehicles per day (1998 count), of which roughly 1% are trucks.

How long is Rg State Park Road over Russian Gulch?

The structure is 31 ft (9.5 m) long with a longest span of 20 ft (6.1 m) and a deck 17 ft wide.

Who owns Rg State Park Road over Russian Gulch?

It is owned by the State Park, Forest, or Reservation Agency.