US Bridges

WATERFRONT-N680 on over Marsh Wetlands

Fair

Contra Costa County, California · 04-CC-680-24.25 · Structure no. 28 0357S

Built
2006
19 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
210 ft
6 main spans
Daily traffic
3,000
2009 count
Owner
State
State Highway Agency

About this bridge

WATERFRONT-N680 on over Marsh Wetlands is a concrete continuous slab carrying WATERFRONT-N680 on over Marsh Wetlands in Contra Costa County, California. It was built in 2006, so it is 19 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 3,000 vehicles a day, roughly 10% of them trucks, projected to reach 5,204 by 2043. The structure is 210 ft (64.1 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesWATERFRONT-N680 on
CrossesMarsh Wetlands
Location04-CC-680-24.25
RouteInterstate 680
CountyContra Costa County
StateCalifornia
Coordinates38.02513, -122.10911
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length210 ft (64.1 m)
Longest span37 ft (11.2 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2009)
Projected traffic5,204 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed0.6 mi (1 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 WATERFRONT-N680 on over Marsh Wetlands built?

It was built in 2006, making it 19 years old in 2025.

What condition is WATERFRONT-N680 on over Marsh Wetlands 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 January 2025.

How much traffic does WATERFRONT-N680 on over Marsh Wetlands carry?

About 3,000 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is WATERFRONT-N680 on over Marsh Wetlands?

The structure is 210 ft (64.1 m) long with a longest span of 37 ft (11.2 m) and a deck 31 ft wide.

Who owns WATERFRONT-N680 on over Marsh Wetlands?

It is owned by the State Highway Agency.