US Bridges

N. Gale Ridge RD over West Branch Alamo Creek

Fair

Contra Costa County, California · 0.1 MI W of Dougherty RD · Structure no. 28C0245

Built
2005
20 years old
Condition
Fair
inspected March 2024
Type
Arch - Deck
Steel
Length
106 ft
3 main spans
Daily traffic
2,300
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

N. Gale Ridge RD over West Branch Alamo Creek is a steel arch - deck carrying N. Gale Ridge RD over West Branch Alamo Creek in Contra Costa County, California. It was built in 2005, so it is 20 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 2,300 vehicles a day, roughly 2% of them trucks, projected to reach 5,434 by 2045. The structure is 106 ft (32.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesN. Gale Ridge RD
CrossesWest Branch Alamo Creek
Location0.1 MI W of Dougherty RD
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.77804, -121.92476
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans3
Design loadUnknown
Structure length106 ft (32.4 m)
Longest span43 ft (13.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2020)
Projected traffic5,434 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 N. Gale Ridge RD over West Branch Alamo Creek built?

It was built in 2005, making it 20 years old in 2025.

What condition is N. Gale Ridge RD over West Branch Alamo 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 March 2024.

How much traffic does N. Gale Ridge RD over West Branch Alamo Creek carry?

About 2,300 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is N. Gale Ridge RD over West Branch Alamo Creek?

The structure is 106 ft (32.4 m) long with a longest span of 43 ft (13.1 m).

Who owns N. Gale Ridge RD over West Branch Alamo Creek?

It is owned by the City or Municipal Highway Agency.