US Bridges

OLYMPIC-S680 on over Las Trampas Creek

Fair

Contra Costa County, California · 04-CC-680-13.72-WLC · Structure no. 28 0162K

Built
1994
31 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
184 ft
1 main span
Daily traffic
10,300
2009 count
Owner
State
State Highway Agency

About this bridge

OLYMPIC-S680 on over Las Trampas Creek is a prestressed concrete box beam or girders - multiple carrying OLYMPIC-S680 on over Las Trampas Creek in Contra Costa County, California. It was built in 1994, so it is 31 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 10,300 vehicles a day, roughly 6% of them trucks, projected to reach 29,148 by 2044. The structure is 184 ft (56.1 m) long and 44 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOLYMPIC-S680 on
CrossesLas Trampas Creek
Location04-CC-680-13.72-WLC
RouteInterstate 680
CountyContra Costa County
StateCalifornia
Coordinates37.8919, -122.06364
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 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 typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length184 ft (56.1 m)
Longest span181 ft (55.2 m)
Deck width44 ft (13.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,300 (2009)
Projected traffic29,148 by 2044
Trucks6%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was OLYMPIC-S680 on over Las Trampas Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is OLYMPIC-S680 on over Las Trampas 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 July 2024.

How much traffic does OLYMPIC-S680 on over Las Trampas Creek carry?

About 10,300 vehicles per day (2009 count), of which roughly 6% are trucks.

How long is OLYMPIC-S680 on over Las Trampas Creek?

The structure is 184 ft (56.1 m) long with a longest span of 181 ft (55.2 m) and a deck 44 ft wide.

Who owns OLYMPIC-S680 on over Las Trampas Creek?

It is owned by the State Highway Agency.