US Bridges

18024: Rocky Bar over Cosumnes River

FairPosted for load

El Dorado County, California · 3.2 MI S Grizzly Flat RD · Structure no. 000000000L59878

Built
1938
87 years old
Condition
Fair
inspected July 2023
Type
Truss - Thru
Steel
Length
130 ft
1 main span
Daily traffic
25
2023 count
Owner
Federal
Bureau of Land Management

About this bridge

18024: Rocky Bar over Cosumnes River is a steel truss - thru carrying 18024: Rocky Bar over Cosumnes River in El Dorado County, California. It was built in 1938, so it is 87 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, projected to reach 25 by 2040. The structure is 130 ft (39.6 m) long and 12 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
Carries18024: Rocky Bar
CrossesCosumnes River
Location3.2 MI S Grizzly Flat RD
RouteFederal Lands Road 0
CountyEl Dorado County
StateCalifornia
Coordinates38.60903, -120.61335
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating16.4 US tons
Inventory rating10 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadH 15
Structure length130 ft (39.6 m)
Longest span76 ft (23.1 m)
Deck width12 ft (3.8 m)
Roadway width11 ft (3.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic25 by 2040
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Land Management
Maintained byBureau of Land Management
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 18024: Rocky Bar over Cosumnes River built?

It was built in 1938, making it 87 years old in 2025.

What condition is 18024: Rocky Bar over Cosumnes River 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 July 2023.

How much traffic does 18024: Rocky Bar over Cosumnes River carry?

About 25 vehicles per day (2023 count).

How long is 18024: Rocky Bar over Cosumnes River?

The structure is 130 ft (39.6 m) long with a longest span of 76 ft (23.1 m) and a deck 12 ft wide.

Who owns 18024: Rocky Bar over Cosumnes River?

It is owned by the Bureau of Land Management.