US Bridges

Murphy Road over Roadside Drain

Good

San Joaquin County, California · 0.1 MI S of Mariposa RD · Structure no. 29C0322

Built
1926
99 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
520
2013 count
Owner
County
County Highway Agency

About this bridge

Murphy Road over Roadside Drain is a concrete continuous slab carrying Murphy Road over Roadside Drain in San Joaquin County, California. It was built in 1926, so it is 99 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 520 vehicles a day, roughly 5% of them trucks, projected to reach 655 by 2045. The structure is 23 ft (7 m) long and 22 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesMurphy Road
CrossesRoadside Drain
Location0.1 MI S of Mariposa RD
RouteCounty Highway 0
Coordinates37.89012, -121.11036
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations on dry land well above flood water elevations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.1 US tons
Inventory rating22.5 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length23 ft (7 m)
Longest span11 ft (3.4 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2013)
Projected traffic655 by 2045
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Murphy Road over Roadside Drain built?

It was built in 1926, making it 99 years old in 2025.

What condition is Murphy Road over Roadside Drain 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 January 2025.

How much traffic does Murphy Road over Roadside Drain carry?

About 520 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Murphy Road over Roadside Drain?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m) and a deck 22 ft wide.

Who owns Murphy Road over Roadside Drain?

It is owned by the County Highway Agency.