US Bridges

State Route 1 over Hardy Creek

Good

Mendocino County, California · 01-MEN-001-83.78 · Structure no. 10 0141

Built
1959
66 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete Continuous
Length
52 ft
3 main spans
Daily traffic
1,185
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Hardy Creek is a concrete continuous slab carrying State Route 1 over Hardy Creek in Mendocino County, California. It was built in 1959, so it is 66 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 1,185 vehicles a day, roughly 3% of them trucks, projected to reach 1,020 by 2043. The structure is 52 ft (15.8 m) long and 34 ft wide. If it were closed, the detour would be 57.2 mi (92 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesHardy Creek
Location01-MEN-001-83.78
RouteState Highway 1
CountyMendocino County
StateCalifornia
Coordinates39.71197, -123.80318
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 inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.2 US tons
Inventory rating41.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length52 ft (15.8 m)
Longest span20 ft (6.1 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,185 (2009)
Projected traffic1,020 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed57.2 mi (92 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 Hardy Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is State Route 1 over Hardy Creek 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 September 2023.

How much traffic does State Route 1 over Hardy Creek carry?

About 1,185 vehicles per day (2009 count), of which roughly 3% are trucks.

How long is State Route 1 over Hardy Creek?

The structure is 52 ft (15.8 m) long with a longest span of 20 ft (6.1 m) and a deck 34 ft wide.

Who owns State Route 1 over Hardy Creek?

It is owned by the State Highway Agency.