US Bridges

Rocky Point Road over Big Grizzly Creek

Fair

Plumas County, California · 0.5 MI S SH 70 · Structure no. 09C0139

Built
1962
63 years old
Condition
Fair
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
145 ft
3 main spans
Daily traffic
130
2016 count
Owner
County
County Highway Agency

About this bridge

Rocky Point Road over Big Grizzly Creek is a concrete continuous tee beam carrying Rocky Point Road over Big Grizzly Creek in Plumas County, California. It was built in 1962, so it is 63 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 130 vehicles a day, roughly 3% of them trucks, projected to reach 374 by 2042. The structure is 145 ft (44.2 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRocky Point Road
CrossesBig Grizzly Creek
Location0.5 MI S SH 70
RouteCounty Highway 0
CountyPlumas County
StateCalifornia
Coordinates39.82036, -120.42278
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating26.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length145 ft (44.2 m)
Longest span60 ft (18.3 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic130 (2016)
Projected traffic374 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Rocky Point Road over Big Grizzly Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Rocky Point Road over Big Grizzly Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does Rocky Point Road over Big Grizzly Creek carry?

About 130 vehicles per day (2016 count), of which roughly 3% are trucks.

How long is Rocky Point Road over Big Grizzly Creek?

The structure is 145 ft (44.2 m) long with a longest span of 60 ft (18.3 m) and a deck 43 ft wide.

Who owns Rocky Point Road over Big Grizzly Creek?

It is owned by the County Highway Agency.