US Bridges

State Route 49 over E Fork Chowchilla River

Good

Mariposa County, California · 10-MPA-049-2.87 · Structure no. 40 0048

Built
1972
53 years old
Condition
Good
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
720 ft
3 main spans
Daily traffic
3,725
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 49 over E Fork Chowchilla River is a prestressed concrete continuous box beam or girders - multiple carrying State Route 49 over E Fork Chowchilla River in Mariposa County, California. It was built in 1972, so it is 53 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 3,725 vehicles a day, roughly 4% of them trucks, projected to reach 4,794 by 2046. The structure is 720 ft (219.5 m) long and 34 ft wide. If it were closed, the detour would be 80.2 mi (129 km).

CarriesState Route 49
CrossesE Fork Chowchilla River
Location10-MPA-049-2.87
RouteState Highway 49
Coordinates37.44561, -119.74519
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 inspectionJuly 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating106.5 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length720 ft (219.5 m)
Longest span300 ft (91.4 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,725 (2009)
Projected traffic4,794 by 2046
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed80.2 mi (129 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 49 over E Fork Chowchilla River built?

It was built in 1972, making it 53 years old in 2025.

What condition is State Route 49 over E Fork Chowchilla 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 July 2024.

How much traffic does State Route 49 over E Fork Chowchilla River carry?

About 3,725 vehicles per day (2009 count), of which roughly 4% are trucks.

How long is State Route 49 over E Fork Chowchilla River?

The structure is 720 ft (219.5 m) long with a longest span of 300 ft (91.4 m) and a deck 34 ft wide.

Who owns State Route 49 over E Fork Chowchilla River?

It is owned by the State Highway Agency.