US Bridges

State Route 26 over M. Fork Mokelumne River

Good

Calaveras County, California · 10-CAL-026-R33.65 · Structure no. 30 0052

Built
1997
28 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
145 ft
1 main span
Daily traffic
1,825
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 26 over M. Fork Mokelumne River is a prestressed concrete box beam or girders - multiple carrying State Route 26 over M. Fork Mokelumne River in Calaveras County, California. It was built in 1997, so it is 28 years old, younger 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 1,825 vehicles a day, roughly 5% of them trucks, projected to reach 4,885 by 2045. The structure is 145 ft (44.2 m) long and 44 ft wide. If it were closed, the detour would be 9.3 mi (15 km).

Location

Open in Google Maps
CarriesState Route 26
CrossesM. Fork Mokelumne River
Location10-CAL-026-R33.65
RouteState Highway 26
CountyCalaveras County
StateCalifornia
Coordinates38.38913, -120.52672
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 protection8 Very GoodNo problems noted.
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length145 ft (44.2 m)
Longest span140 ft (42.8 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,825 (2009)
Projected traffic4,885 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.3 mi (15 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 M. Fork Mokelumne River built?

It was built in 1997, making it 28 years old in 2025.

What condition is State Route 26 over M. 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 M. Fork Mokelumne River carry?

About 1,825 vehicles per day (2009 count), of which roughly 5% are trucks.

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

The structure is 145 ft (44.2 m) long with a longest span of 140 ft (42.8 m) and a deck 44 ft wide.

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

It is owned by the State Highway Agency.