US Bridges

Timbuctoo Road over Deep Ravine No 2

PoorPosted for load

Yuba County, California · 0.1 MI N/W of SR 20 · Structure no. 16C0011

Built
1903
122 years old
Condition
Poor
inspected August 2024
Type
Truss - Thru
Steel
Length
96 ft
1 main span
Daily traffic
50
2011 count
Owner
County
County Highway Agency

About this bridge

Timbuctoo Road over Deep Ravine No 2 is a steel truss - thru carrying Timbuctoo Road over Deep Ravine No 2 in Yuba County, California. It was built in 1903, so it is 122 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 2% of them trucks, projected to reach 156 by 2046. The structure is 96 ft (29.3 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTimbuctoo Road
CrossesDeep Ravine No 2
Location0.1 MI N/W of SR 20
RouteCounty Highway 0
Coordinates39.21091, -121.31106
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15.3 US tons
Inventory rating9.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+1 approach)
Design loadUnknown
Structure length96 ft (29.3 m)
Longest span70 ft (21.3 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2011)
Projected traffic156 by 2046
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Timbuctoo Road over Deep Ravine No 2 built?

It was built in 1903, making it 122 years old in 2025.

What condition is Timbuctoo Road over Deep Ravine No 2 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2024.

How much traffic does Timbuctoo Road over Deep Ravine No 2 carry?

About 50 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Timbuctoo Road over Deep Ravine No 2?

The structure is 96 ft (29.3 m) long with a longest span of 70 ft (21.3 m) and a deck 16 ft wide.

Who owns Timbuctoo Road over Deep Ravine No 2?

It is owned by the County Highway Agency.