US Bridges

Great America Pkwy over Agnew Overflow

Poor

Santa Clara County, California · Just West of Gold Street · Structure no. 37C0714

Built
1957
68 years old
Condition
Poor
inspected March 2024
Type
Tee Beam
Concrete
Length
137 ft
7 main spans
Daily traffic
7,500
2000 count
Owner
City
City or Municipal Highway Agency

About this bridge

Great America Pkwy over Agnew Overflow is a concrete tee beam carrying Great America Pkwy over Agnew Overflow in Santa Clara County, California. It was built in 1957, so it is 68 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 7,500 vehicles a day, roughly 9% of them trucks, projected to reach 21,519 by 2042. The structure is 137 ft (41.8 m) long and 54 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesGreat America Pkwy
CrossesAgnew Overflow
LocationJust West of Gold Street
RouteCity Street 0
Coordinates37.41789, -121.97438
Functional classUrban Local

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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating23.9 US tons
Inventory rating18.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadH 20
Structure length137 ft (41.8 m)
Longest span19 ft (5.8 m)
Deck width54 ft (16.5 m)
Roadway width50 ft (15.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,500 (2000)
Projected traffic21,519 by 2042
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesOther
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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$1.2 million (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Great America Pkwy over Agnew Overflow built?

It was built in 1957, making it 68 years old in 2025.

What condition is Great America Pkwy over Agnew Overflow 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 March 2024.

How much traffic does Great America Pkwy over Agnew Overflow carry?

About 7,500 vehicles per day (2000 count), of which roughly 9% are trucks.

How long is Great America Pkwy over Agnew Overflow?

The structure is 137 ft (41.8 m) long with a longest span of 19 ft (5.8 m) and a deck 54 ft wide.

Who owns Great America Pkwy over Agnew Overflow?

It is owned by the City or Municipal Highway Agency.