US Bridges

Gawne RD over Drain a

Good

San Joaquin County, California · 0.7 MI E Mariposa RD · Structure no. 29C0245

Built
1935
90 years old, rebuilt 1961
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
65 ft
4 main spans
Daily traffic
427
2013 count
Owner
County
County Highway Agency

About this bridge

Gawne RD over Drain a is a concrete continuous slab carrying Gawne RD over Drain a in San Joaquin County, California. It was built in 1935 and reconstructed in 1961, so it is 90 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 427 vehicles a day, roughly 5% of them trucks, projected to reach 546 by 2041. The structure is 65 ft (19.8 m) long and 32 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesGawne RD
CrossesDrain a
Location0.7 MI E Mariposa RD
RouteCounty Highway 0
Coordinates37.89186, -121.1
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 protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.7 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadUnknown
Structure length65 ft (19.8 m)
Longest span16 ft (4.9 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic427 (2013)
Projected traffic546 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Gawne RD over Drain a built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1961.

What condition is Gawne RD over Drain a 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 March 2023.

How much traffic does Gawne RD over Drain a carry?

About 427 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Gawne RD over Drain a?

The structure is 65 ft (19.8 m) long with a longest span of 16 ft (4.9 m) and a deck 32 ft wide.

Who owns Gawne RD over Drain a?

It is owned by the County Highway Agency.