US Bridges

State Route 4 over Gardner Lane

Fair

Calaveras County, California · 10-CAL-004-R21.42 · Structure no. 30 0053

Built
2009
16 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
288 ft
3 main spans
Daily traffic
7,900
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 4 over Gardner Lane is a prestressed concrete continuous box beam or girders - multiple carrying State Route 4 over Gardner Lane in Calaveras County, California. It was built in 2009, so it is 16 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 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 7,900 vehicles a day, roughly 5% of them trucks, projected to reach 15,127 by 2045. The structure is 288 ft (87.7 m) long and 62 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesState Route 4
CrossesGardner Lane
Location10-CAL-004-R21.42
RouteState Highway 4
CountyCalaveras County
StateCalifornia
Coordinates38.08529, -120.55405
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length288 ft (87.7 m)
Longest span115 ft (35.1 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (18 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,900 (2019)
Projected traffic15,127 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 4 over Gardner Lane built?

It was built in 2009, making it 16 years old in 2025.

What condition is State Route 4 over Gardner Lane 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 Gardner Lane carry?

About 7,900 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is State Route 4 over Gardner Lane?

The structure is 288 ft (87.7 m) long with a longest span of 115 ft (35.1 m) and a deck 62 ft wide.

Who owns State Route 4 over Gardner Lane?

It is owned by the State Highway Agency.