US Bridges

Bernard Road over Marsh Creek

Good

Contra Costa County, California · 160 M NE Main ST/SR-4 · Structure no. 28C0266

Built
2003
22 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
97 ft
1 main span
Daily traffic
4,200
2009 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bernard Road over Marsh Creek is a steel stringer/multi-beam or girder carrying Bernard Road over Marsh Creek in Contra Costa County, California. It was built in 2003, so it is 22 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 4,200 vehicles a day, roughly 5% of them trucks, projected to reach 2,828 by 2043. The structure is 97 ft (29.6 m) long and 52 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesBernard Road
CrossesMarsh Creek
Location160 M NE Main ST/SR-4
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.98679, -121.69394
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating108.6 US tons
Inventory rating65 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length97 ft (29.6 m)
Longest span97 ft (29.6 m)
Deck width52 ft (15.8 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2009)
Projected traffic2,828 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 Bernard Road over Marsh Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is Bernard Road over Marsh 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 January 2025.

How much traffic does Bernard Road over Marsh Creek carry?

About 4,200 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Bernard Road over Marsh Creek?

The structure is 97 ft (29.6 m) long with a longest span of 97 ft (29.6 m) and a deck 52 ft wide.

Who owns Bernard Road over Marsh Creek?

It is owned by the City or Municipal Highway Agency.