US Bridges

State Route 26 over S. Fork Mokelumne River

Good

Calaveras County, California · 10-CAL-026-30.00 · Structure no. 30 0022

Built
1936
89 years old
Condition
Good
inspected May 2023
Type
Tee Beam
Concrete
Length
120 ft
3 main spans
Daily traffic
750
2019 count
Owner
State
State Highway Agency

About this bridge

State Route 26 over S. Fork Mokelumne River is a concrete tee beam carrying State Route 26 over S. Fork Mokelumne River in Calaveras County, California. It was built in 1936, so it is 89 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 750 vehicles a day, roughly 5% of them trucks, projected to reach 2,653 by 2045. The structure is 120 ft (36.6 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesState Route 26
CrossesS. Fork Mokelumne River
Location10-CAL-026-30.00
RouteState Highway 26
Coordinates38.36909, -120.547
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.2 US tons
Inventory rating32.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length120 ft (36.6 m)
Longest span60 ft (18.3 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2019)
Projected traffic2,653 by 2045
Trucks5%
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

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 26 over S. Fork Mokelumne River built?

It was built in 1936, making it 89 years old in 2025.

What condition is State Route 26 over S. Fork Mokelumne River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does State Route 26 over S. Fork Mokelumne River carry?

About 750 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is State Route 26 over S. Fork Mokelumne River?

The structure is 120 ft (36.6 m) long with a longest span of 60 ft (18.3 m) and a deck 27 ft wide.

Who owns State Route 26 over S. Fork Mokelumne River?

It is owned by the State Highway Agency.