US Bridges

Eureka Hill Road over Garcia River

Fair

Mendocino County, California · 4.9 MI W of RTE 1 · Structure no. 10C0034

Built
1969
56 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
324 ft
4 main spans
Daily traffic
330
2011 count
Owner
County
County Highway Agency

About this bridge

Eureka Hill Road over Garcia River is a concrete continuous box beam or girders - multiple carrying Eureka Hill Road over Garcia River in Mendocino County, California. It was built in 1969, so it is 56 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 330 vehicles a day, roughly 5% of them trucks, projected to reach 655 by 2041. The structure is 324 ft (98.7 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesEureka Hill Road
CrossesGarcia River
Location4.9 MI W of RTE 1
RouteCounty Highway 0
CountyMendocino County
StateCalifornia
Coordinates38.90339, -123.60811
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length324 ft (98.7 m)
Longest span123 ft (37.4 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (2011)
Projected traffic655 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Eureka Hill Road over Garcia River built?

It was built in 1969, making it 56 years old in 2025.

What condition is Eureka Hill Road over Garcia River 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 Eureka Hill Road over Garcia River carry?

About 330 vehicles per day (2011 count), of which roughly 5% are trucks.

How long is Eureka Hill Road over Garcia River?

The structure is 324 ft (98.7 m) long with a longest span of 123 ft (37.4 m) and a deck 23 ft wide.

Who owns Eureka Hill Road over Garcia River?

It is owned by the County Highway Agency.