US Bridges

Brentwood Blvd over Marsh Creek

Fair

Contra Costa County, California · 0.1 M N/O Kayla Pl · Structure no. 28C0269

Built
1928
97 years old, rebuilt 1977
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
82 ft
3 main spans
Daily traffic
17,900
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Brentwood Blvd over Marsh Creek is a steel stringer/multi-beam or girder carrying Brentwood Blvd over Marsh Creek in Contra Costa County, California. It was built in 1928 and reconstructed in 1977, so it is 97 years old, older 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 6 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 17,900 vehicles a day, roughly 10% of them trucks, projected to reach 48,521 by 2045. The structure is 82 ft (25 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesBrentwood Blvd
CrossesMarsh Creek
Location0.1 M N/O Kayla Pl
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.95268, -121.69602
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length82 ft (25 m)
Longest span30 ft (9.1 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,900 (2020)
Projected traffic48,521 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Brentwood Blvd over Marsh Creek built?

It was built in 1928, making it 97 years old in 2025. It was reconstructed in 1977.

What condition is Brentwood Blvd over Marsh 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 January 2025.

How much traffic does Brentwood Blvd over Marsh Creek carry?

About 17,900 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Brentwood Blvd over Marsh Creek?

The structure is 82 ft (25 m) long with a longest span of 30 ft (9.1 m) and a deck 48 ft wide.

Who owns Brentwood Blvd over Marsh Creek?

It is owned by the City or Municipal Highway Agency.