US Bridges

State Route 1 over Hare Creek

Good

Mendocino County, California · 01-MEN-001-59.67 · Structure no. 10 0175

Built
1947
78 years old
Condition
Good
inspected September 2023
Type
Arch - Deck
Concrete
Length
384 ft
3 main spans
Daily traffic
14,500
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over Hare Creek is a concrete arch - deck carrying State Route 1 over Hare Creek in Mendocino County, California. It was built in 1947, so it is 78 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 14,500 vehicles a day, roughly 6% of them trucks, projected to reach 27,435 by 2043. The structure is 384 ft (117 m) long and 31 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesHare Creek
Location01-MEN-001-59.67
RouteState Highway 1
CountyMendocino County
StateCalifornia
Coordinates39.41818, -123.80799
Functional classUrban 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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length384 ft (117 m)
Longest span199 ft (60.7 m)
Deck width31 ft (9.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,500 (2009)
Projected traffic27,435 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.3 mi (23 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 Hare Creek built?

It was built in 1947, making it 78 years old in 2025.

What condition is State Route 1 over Hare 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 Hare Creek carry?

About 14,500 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is State Route 1 over Hare Creek?

The structure is 384 ft (117 m) long with a longest span of 199 ft (60.7 m) and a deck 31 ft wide.

Who owns State Route 1 over Hare Creek?

It is owned by the State Highway Agency.