US Bridges

Boulevard Way over Las Trampas Creek

Good

Contra Costa County, California · 0.2 MI N Olympic Blvd · Structure no. 28C0196

Built
1978
47 years old
Condition
Good
inspected November 2024
Type
Tee Beam
Prestressed Concrete
Length
77 ft
2 main spans
Daily traffic
4,840
2013 count
Owner
County
County Highway Agency

About this bridge

Boulevard Way over Las Trampas Creek is a prestressed concrete tee beam carrying Boulevard Way over Las Trampas Creek in Contra Costa County, California. It was built in 1978, so it is 47 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,840 vehicles a day, roughly 5% of them trucks, projected to reach 9,826 by 2046. The structure is 77 ft (23.5 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesBoulevard Way
CrossesLas Trampas Creek
Location0.2 MI N Olympic Blvd
RouteCounty Highway 0
Coordinates37.88757, -122.07881
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length77 ft (23.5 m)
Longest span37 ft (11.3 m)
Deck width46 ft (14 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,840 (2013)
Projected traffic9,826 by 2046
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Boulevard Way over Las Trampas Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Boulevard Way over Las Trampas Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Boulevard Way over Las Trampas Creek carry?

About 4,840 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Boulevard Way over Las Trampas Creek?

The structure is 77 ft (23.5 m) long with a longest span of 37 ft (11.3 m) and a deck 46 ft wide.

Who owns Boulevard Way over Las Trampas Creek?

It is owned by the County Highway Agency.