US Bridges

Interstate 205 over Delta-Mendota Canal

Fair

San Joaquin County, California · 10-SJ-205-0.15 · Structure no. 29 0037

Built
1953
72 years old, rebuilt 1998
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
157 ft
3 main spans
Daily traffic
106,000
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 205 over Delta-Mendota Canal is a concrete continuous tee beam carrying Interstate 205 over Delta-Mendota Canal in San Joaquin County, California. It was built in 1953 and reconstructed in 1998, so it is 72 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 5 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 106,000 vehicles a day, roughly 12% of them trucks, projected to reach 172,574 by 2046. The structure is 157 ft (47.8 m) long and 116 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesInterstate 205
CrossesDelta-Mendota Canal
Location10-SJ-205-0.15
RouteInterstate 205
Coordinates37.74322, -121.55374
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating24.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length157 ft (47.8 m)
Longest span60 ft (18.3 m)
Deck width116 ft (35.3 m)
Roadway width111 ft (33.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic106,000 (2009)
Projected traffic172,574 by 2046
Trucks12%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 205 over Delta-Mendota Canal built?

It was built in 1953, making it 72 years old in 2025. It was reconstructed in 1998.

What condition is Interstate 205 over Delta-Mendota Canal 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 March 2024.

How much traffic does Interstate 205 over Delta-Mendota Canal carry?

About 106,000 vehicles per day (2009 count), of which roughly 12% are trucks.

How long is Interstate 205 over Delta-Mendota Canal?

The structure is 157 ft (47.8 m) long with a longest span of 60 ft (18.3 m) and a deck 116 ft wide.

Who owns Interstate 205 over Delta-Mendota Canal?

It is owned by the State Highway Agency.