US Bridges

State Route 1 over Garcia River

Good

Mendocino County, California · 01-MEN-001-18.50 · Structure no. 10 0113

Built
1938
87 years old
Condition
Good
inspected August 2024
Type
Truss - Thru
Steel
Length
320 ft
1 main span
Daily traffic
2,100
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Garcia River is a steel truss - thru carrying State Route 1 over Garcia River in Mendocino County, California. It was built in 1938, so it is 87 years old, older 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 2,100 vehicles a day, roughly 16% of them trucks, projected to reach 3,173 by 2042. The structure is 320 ft (97.5 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesState Route 1
CrossesGarcia River
Location01-MEN-001-18.50
RouteState Highway 1
Coordinates38.9442, -123.70108
Functional classRural Minor Arterial

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadH 15
Structure length320 ft (97.5 m)
Longest span120 ft (36.6 m)
Deck width28 ft (8.5 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,100 (2009)
Projected traffic3,173 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 1 over Garcia River built?

It was built in 1938, making it 87 years old in 2025.

What condition is State Route 1 over Garcia 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 August 2024.

How much traffic does State Route 1 over Garcia River carry?

About 2,100 vehicles per day (2009 count), of which roughly 16% are trucks.

How long is State Route 1 over Garcia River?

The structure is 320 ft (97.5 m) long with a longest span of 120 ft (36.6 m) and a deck 28 ft wide.

Who owns State Route 1 over Garcia River?

It is owned by the State Highway Agency.