US Bridges

State Route 12 over Haupt Creek

Fair

Calaveras County, California · 10-CAL-012-13.93 · Structure no. 30 0006

Built
1993
32 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
107 ft
1 main span
Daily traffic
7,500
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 12 over Haupt Creek is a prestressed concrete box beam or girders - multiple carrying State Route 12 over Haupt Creek in Calaveras County, California. It was built in 1993, so it is 32 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 7,500 vehicles a day, roughly 7% of them trucks, projected to reach 18,580 by 2045. The structure is 107 ft (32.6 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesState Route 12
CrossesHaupt Creek
Location10-CAL-012-13.93
RouteState Highway 12
CountyCalaveras County
StateCalifornia
Coordinates38.21192, -120.76372
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length107 ft (32.6 m)
Longest span105 ft (32 m)
Deck width55 ft (16.9 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2009)
Projected traffic18,580 by 2045
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 12 over Haupt Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is State Route 12 over Haupt 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 12 over Haupt Creek carry?

About 7,500 vehicles per day (2009 count), of which roughly 7% are trucks.

How long is State Route 12 over Haupt Creek?

The structure is 107 ft (32.6 m) long with a longest span of 105 ft (32 m) and a deck 55 ft wide.

Who owns State Route 12 over Haupt Creek?

It is owned by the State Highway Agency.