US Bridges

Murphy Road over Lone Tree Creek

Fair

San Joaquin County, California · 0.6 MI N of Lone Tree RD · Structure no. 29C0330

Built
1926
99 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
380
2013 count
Owner
County
County Highway Agency

About this bridge

Murphy Road over Lone Tree Creek is a concrete continuous slab carrying Murphy Road over Lone Tree Creek 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 fair condition with a lowest component rating of 6 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 380 vehicles a day, roughly 5% of them trucks, projected to reach 555 by 2046. The structure is 37 ft (11.3 m) long and 22 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesMurphy Road
CrossesLone Tree Creek
Location0.6 MI N of Lone Tree RD
RouteCounty Highway 0
Coordinates37.83543, -121.10818
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to 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 rating51.5 US tons
Inventory rating31.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length37 ft (11.3 m)
Longest span17 ft (5.3 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (2013)
Projected traffic555 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 Lone Tree Creek built?

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

What condition is Murphy Road over Lone Tree Creek 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 September 2024.

How much traffic does Murphy Road over Lone Tree Creek carry?

About 380 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Murphy Road over Lone Tree Creek?

The structure is 37 ft (11.3 m) long with a longest span of 17 ft (5.3 m) and a deck 22 ft wide.

Who owns Murphy Road over Lone Tree Creek?

It is owned by the County Highway Agency.