US Bridges

State Route 4 over Waterman Creek

Fair

Calaveras County, California · 10-CAL-004-17.60 · Structure no. 30 0047

Built
1941
84 years old, rebuilt 1973
Condition
Fair
inspected May 2023
Type
Culvert
Concrete Continuous
Length
41 ft
4 main spans
Daily traffic
7,900
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over Waterman Creek is a concrete continuous culvert carrying State Route 4 over Waterman Creek in Calaveras County, California. It was built in 1941 and reconstructed in 1973, so it is 84 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 7,900 vehicles a day, roughly 4% of them trucks, projected to reach 10,724 by 2045. The structure is 41 ft (12.4 m) long and 34 ft wide. If it were closed, the detour would be 20.5 mi (33 km).

Location

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CarriesState Route 4
CrossesWaterman Creek
Location10-CAL-004-17.60
RouteState Highway 4
CountyCalaveras County
StateCalifornia
Coordinates38.06798, -120.61429
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length41 ft (12.4 m)
Longest span10 ft (2.9 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,900 (2019)
Projected traffic10,724 by 2045
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed20.5 mi (33 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 State Route 4 over Waterman Creek built?

It was built in 1941, making it 84 years old in 2025. It was reconstructed in 1973.

What condition is State Route 4 over Waterman 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 May 2023.

How much traffic does State Route 4 over Waterman Creek carry?

About 7,900 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is State Route 4 over Waterman Creek?

The structure is 41 ft (12.4 m) long with a longest span of 10 ft (2.9 m) and a deck 34 ft wide.

Who owns State Route 4 over Waterman Creek?

It is owned by the State Highway Agency.