US Bridges

N. Broadway over Walnut Creek

Fair

Contra Costa County, California · B/W Lincoln & Duncan St. · Structure no. 28C0185

Built
1971
54 years old
Condition
Fair
inspected January 2025
Type
Tee Beam
Concrete
Length
65 ft
1 main span
Daily traffic
20,905
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

N. Broadway over Walnut Creek is a concrete tee beam carrying N. Broadway over Walnut Creek in Contra Costa County, California. It was built in 1971, so it is 54 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 20,905 vehicles a day, roughly 6% of them trucks, projected to reach 37,945 by 2047. The structure is 65 ft (19.8 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN. Broadway
CrossesWalnut Creek
LocationB/W Lincoln & Duncan St.
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.9, -122.05982
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.5 US tons
Inventory rating19.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length65 ft (19.8 m)
Longest span63 ft (19.3 m)
Deck width85 ft (25.9 m)
Roadway width54 ft (16.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,905 (2019)
Projected traffic37,945 by 2047
Trucks6%
Lanes on structure5
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

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 N. Broadway over Walnut Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is N. Broadway over Walnut 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 N. Broadway over Walnut Creek carry?

About 20,905 vehicles per day (2019 count), of which roughly 6% are trucks.

How long is N. Broadway over Walnut Creek?

The structure is 65 ft (19.8 m) long with a longest span of 63 ft (19.3 m) and a deck 85 ft wide.

Who owns N. Broadway over Walnut Creek?

It is owned by the City or Municipal Highway Agency.