US Bridges

Interstate 680 NB over Grimmer Blvd

Fair

Alameda County, California · 04-ALA-680-M3.35-FMT · Structure no. 33 0429R

Built
1971
54 years old
Condition
Fair
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
147 ft
1 main span
Daily traffic
70,000
2018 count
Owner
State
State Highway Agency

About this bridge

Interstate 680 NB over Grimmer Blvd is a prestressed concrete box beam or girders - multiple carrying Interstate 680 NB over Grimmer Blvd in Alameda County, California. It was built in 1971, so it is 54 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 70,000 vehicles a day, roughly 9% of them trucks, projected to reach 117,710 by 2042. The structure is 147 ft (44.8 m) long and 53 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesInterstate 680 NB
CrossesGrimmer Blvd
Location04-ALA-680-M3.35-FMT
RouteInterstate 680
CountyAlameda County
StateCalifornia
Coordinates37.506, -121.93439
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating35.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length147 ft (44.8 m)
Longest span147 ft (44.8 m)
Deck width53 ft (16.1 m)
Roadway width51 ft (15.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70,000 (2018)
Projected traffic117,710 by 2042
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 680 NB over Grimmer Blvd built?

It was built in 1971, making it 54 years old in 2025.

What condition is Interstate 680 NB over Grimmer Blvd 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 680 NB over Grimmer Blvd carry?

About 70,000 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is Interstate 680 NB over Grimmer Blvd?

The structure is 147 ft (44.8 m) long with a longest span of 147 ft (44.8 m) and a deck 53 ft wide.

Who owns Interstate 680 NB over Grimmer Blvd?

It is owned by the State Highway Agency.