US Bridges

Fallon Road over Kobold Creek

Fair

Alameda County, California · 0.3 MI SE of Tassajara RD · Structure no. 33C0440

Built
2010
15 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Prestressed Concrete
Length
117 ft
1 main span
Daily traffic
4,000
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Fallon Road over Kobold Creek is a prestressed concrete tee beam carrying Fallon Road over Kobold Creek in Alameda County, California. It was built in 2010, so it is 15 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 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 4,000 vehicles a day, roughly 10% of them trucks, projected to reach 2,130 by 2043. The structure is 117 ft (35.8 m) long and 83 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesFallon Road
CrossesKobold Creek
Location0.3 MI SE of Tassajara RD
RouteCity Street 0
CountyAlameda County
StateCalifornia
Coordinates37.73034, -121.86293
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.1 US tons
Inventory rating42.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length117 ft (35.8 m)
Longest span111 ft (33.7 m)
Deck width83 ft (25.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2014)
Projected traffic2,130 by 2043
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Fallon Road over Kobold Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is Fallon Road over Kobold Creek 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 October 2023.

How much traffic does Fallon Road over Kobold Creek carry?

About 4,000 vehicles per day (2014 count), of which roughly 10% are trucks.

How long is Fallon Road over Kobold Creek?

The structure is 117 ft (35.8 m) long with a longest span of 111 ft (33.7 m) and a deck 83 ft wide.

Who owns Fallon Road over Kobold Creek?

It is owned by the City or Municipal Highway Agency.