US Bridges

Harbin Springs RD over Harbin Creek

Good

Lake County, California · 2.5 MI NW of Big Cyn RD · Structure no. 14C0129

Built
2018
7 years old
Condition
Good
inspected March 2022
Type
Slab
Concrete
Length
46 ft
1 main span
Daily traffic
690
2011 count
Owner
County
County Highway Agency

About this bridge

Harbin Springs RD over Harbin Creek is a concrete slab carrying Harbin Springs RD over Harbin Creek in Lake County, California. It was built in 2018, so it is 7 years old, younger 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 690 vehicles a day, roughly 1% of them trucks, projected to reach 1,092 by 2044. The structure is 46 ft (13.9 m) long and 29 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesHarbin Springs RD
CrossesHarbin Creek
Location2.5 MI NW of Big Cyn RD
RouteCounty Highway 0
Coordinates38.78848, -122.65374
Functional classRural Local

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 inspectionMarch 2022
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length46 ft (13.9 m)
Longest span44 ft (13.4 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic690 (2011)
Projected traffic1,092 by 2044
Trucks1%
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Harbin Springs RD over Harbin Creek built?

It was built in 2018, making it 7 years old in 2025.

What condition is Harbin Springs RD over Harbin 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 March 2022.

How much traffic does Harbin Springs RD over Harbin Creek carry?

About 690 vehicles per day (2011 count), of which roughly 1% are trucks.

How long is Harbin Springs RD over Harbin Creek?

The structure is 46 ft (13.9 m) long with a longest span of 44 ft (13.4 m) and a deck 29 ft wide.

Who owns Harbin Springs RD over Harbin Creek?

It is owned by the County Highway Agency.