US Bridges

Old Amador Road over Rancheria Creek

PoorPosted for load

Amador County, California · 0.8 MI NW of Main ST · Structure no. 26C0042

Built
1925
100 years old
Condition
Poor
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
65 ft
1 main span
Daily traffic
25
2014 count
Owner
County
County Highway Agency

About this bridge

Old Amador Road over Rancheria Creek is a steel stringer/multi-beam or girder carrying Old Amador Road over Rancheria Creek in Amador County, California. It was built in 1925, so it is 100 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 25 vehicles a day, roughly 1% of them trucks, projected to reach 42 by 2042. The structure is 65 ft (19.8 m) long and 17 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesOld Amador Road
CrossesRancheria Creek
Location0.8 MI NW of Main ST
RouteCounty Highway 0
Coordinates38.42269, -120.83888
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating3.2 US tons
Inventory rating0 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+1 approach)
Design loadUnknown
Structure length65 ft (19.8 m)
Longest span42 ft (12.8 m)
Deck width17 ft (5.3 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2014)
Projected traffic42 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$405,000 (2017 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Amador Road over Rancheria Creek built?

It was built in 1925, making it 100 years old in 2025.

What condition is Old Amador Road over Rancheria Creek 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 April 2024.

How much traffic does Old Amador Road over Rancheria Creek carry?

About 25 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is Old Amador Road over Rancheria Creek?

The structure is 65 ft (19.8 m) long with a longest span of 42 ft (12.8 m) and a deck 17 ft wide.

Who owns Old Amador Road over Rancheria Creek?

It is owned by the County Highway Agency.