US Bridges

Sperry Avenue over California Aqueduct

Poor

Stanislaus County, California · 0.1 MI E of I 5 · Structure no. 38C0053

Built
1967
58 years old
Condition
Poor
inspected August 2023
Type
Tee Beam
Concrete Continuous
Length
162 ft
2 main spans
Daily traffic
10,820
2017 count
Owner
State
Other State Agency

About this bridge

Sperry Avenue over California Aqueduct is a concrete continuous tee beam carrying Sperry Avenue over California Aqueduct in Stanislaus County, California. It was built in 1967, so it is 58 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 10,820 vehicles a day, roughly 11% of them trucks, projected to reach 12,449 by 2045. The structure is 162 ft (49.4 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSperry Avenue
CrossesCalifornia Aqueduct
Location0.1 MI E of I 5
RouteCounty Highway 0
Coordinates37.46417, -121.17875
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length162 ft (49.4 m)
Longest span80 ft (24.4 m)
Deck width35 ft (10.6 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,820 (2017)
Projected traffic12,449 by 2045
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$876,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sperry Avenue over California Aqueduct built?

It was built in 1967, making it 58 years old in 2025.

What condition is Sperry Avenue over California Aqueduct in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does Sperry Avenue over California Aqueduct carry?

About 10,820 vehicles per day (2017 count), of which roughly 11% are trucks.

How long is Sperry Avenue over California Aqueduct?

The structure is 162 ft (49.4 m) long with a longest span of 80 ft (24.4 m) and a deck 35 ft wide.

Who owns Sperry Avenue over California Aqueduct?

It is owned by the Other State Agency and maintained by the County Highway Agency.