US Bridges

Silver Rapids RD over Kathy Creek

Fair

Calaveras County, California · 1 MI E JCT With SR 26 · Structure no. 30C0071

Built
1975
50 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete Continuous
Length
39 ft
3 main spans
Daily traffic
1,014
2011 count
Owner
County
County Highway Agency

About this bridge

Silver Rapids RD over Kathy Creek is a concrete continuous culvert carrying Silver Rapids RD over Kathy Creek in Calaveras County, California. It was built in 1975, so it is 50 years old, younger 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 1,014 vehicles a day, roughly 7% of them trucks, projected to reach 1,317 by 2043. The structure is 39 ft (11.9 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesSilver Rapids RD
CrossesKathy Creek
Location1 MI E JCT With SR 26
RouteCounty Highway 0
CountyCalaveras County
StateCalifornia
Coordinates38.15614, -120.8384
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width33 ft (10.2 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,014 (2011)
Projected traffic1,317 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Silver Rapids RD over Kathy Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Silver Rapids RD over Kathy 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 February 2025.

How much traffic does Silver Rapids RD over Kathy Creek carry?

About 1,014 vehicles per day (2011 count), of which roughly 7% are trucks.

How long is Silver Rapids RD over Kathy Creek?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m) and a deck 33 ft wide.

Who owns Silver Rapids RD over Kathy Creek?

It is owned by the County Highway Agency.