US Bridges

South Ave over South Fork Jackson Creek

Fair

Amador County, California · 100 Ft NE of ST RTE 49 · Structure no. 26C0004

Built
1925
100 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
800
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

South Ave over South Fork Jackson Creek is a steel stringer/multi-beam or girder carrying South Ave over South Fork Jackson 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 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.

It carries about 800 vehicles a day, roughly 3% of them trucks, projected to reach 870 by 2042. The structure is 31 ft (9.4 m) long and 16 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSouth Ave
CrossesSouth Fork Jackson Creek
Location100 Ft NE of ST RTE 49
RouteCity Street 0
Coordinates38.34395, -120.76838
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating23.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length31 ft (9.4 m)
Longest span29 ft (8.7 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2011)
Projected traffic870 by 2042
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 South Ave over South Fork Jackson Creek built?

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

What condition is South Ave over South Fork Jackson 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 April 2024.

How much traffic does South Ave over South Fork Jackson Creek carry?

About 800 vehicles per day (2011 count), of which roughly 3% are trucks.

How long is South Ave over South Fork Jackson Creek?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.7 m) and a deck 16 ft wide.

Who owns South Ave over South Fork Jackson Creek?

It is owned by the City or Municipal Highway Agency.