US Bridges

Grider Road over West Grider Creek

Good

Siskiyou County, California · 3 MI SW of SR96 · Structure no. 02C0218

Built
1971
54 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete Continuous
Length
42 ft
2 main spans
Daily traffic
6
2011 count
Owner
County
County Highway Agency

About this bridge

Grider Road over West Grider Creek is a concrete continuous slab carrying Grider Road over West Grider Creek in Siskiyou County, California. It was built in 1971, so it is 54 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 6 vehicles a day, projected to reach 11 by 2042. The structure is 42 ft (12.8 m) long and 21 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

Location

Open in Google Maps
CarriesGrider Road
CrossesWest Grider Creek
Location3 MI SW of SR96
RouteCounty Highway 0
CountySiskiyou County
StateCalifornia
Coordinates41.84104, -123.21129
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 protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating46.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length42 ft (12.8 m)
Longest span20 ft (6.1 m)
Deck width21 ft (6.3 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6 (2011)
Projected traffic11 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 Grider Road over West Grider Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Grider Road over West Grider 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 July 2024.

How much traffic does Grider Road over West Grider Creek carry?

About 6 vehicles per day (2011 count).

How long is Grider Road over West Grider Creek?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.1 m) and a deck 21 ft wide.

Who owns Grider Road over West Grider Creek?

It is owned by the County Highway Agency.