US Bridges

Collier RD over Drain Ditch

Fair

San Joaquin County, California · 0.3 MI E of Sowles RD · Structure no. 29C0252

Built
1972
53 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
1,084
2013 count
Owner
County
County Highway Agency

About this bridge

Collier RD over Drain Ditch is a concrete continuous culvert carrying Collier RD over Drain Ditch in San Joaquin 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 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 1,084 vehicles a day, roughly 20% of them trucks, projected to reach 2,402 by 2046. The structure is 23 ft (7 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesCollier RD
CrossesDrain Ditch
Location0.3 MI E of Sowles RD
RouteCounty Highway 0
Coordinates38.21888, -121.18311
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length23 ft (7 m)
Longest span10 ft (3 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,084 (2013)
Projected traffic2,402 by 2046
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Collier RD over Drain Ditch built?

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

What condition is Collier RD over Drain Ditch 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 January 2024.

How much traffic does Collier RD over Drain Ditch carry?

About 1,084 vehicles per day (2013 count), of which roughly 20% are trucks.

How long is Collier RD over Drain Ditch?

The structure is 23 ft (7 m) long with a longest span of 10 ft (3 m) and a deck 36 ft wide.

Who owns Collier RD over Drain Ditch?

It is owned by the County Highway Agency.