US Bridges

Waterfront RD over Slough

PoorClosed to traffic

Contra Costa County, California · West of T1/T2 · Structure no. DAPAMCCON000452

Built
1945
80 years old
Condition
Poor
inspected October 2019
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
2 main spans
Daily traffic
—
2019 count
Owner
Federal
Army

About this bridge

Waterfront RD over Slough is a wood or timber stringer/multi-beam or girder carrying Waterfront RD over Slough in Contra Costa County, California. It was built in 1945, so it is 80 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

No traffic count is recorded. The structure is 38 ft (11.7 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesWaterfront RD
CrossesSlough
LocationWest of T1/T2
CountyContra Costa County
StateCalifornia
Coordinates38.04061, -122.04937
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2019
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourScour evaluation has not been made
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating—
Inventory rating—

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length38 ft (11.7 m)
Longest span19 ft (5.9 m)
Deck width26 ft (8 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic—
Projected traffic—
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerArmy
Maintained byArmy
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$109,000 (2019 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Waterfront RD over Slough built?

It was built in 1945, making it 80 years old in 2025.

What condition is Waterfront RD over Slough in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2019.

How much traffic does Waterfront RD over Slough carry?

No traffic count is recorded for this structure.

How long is Waterfront RD over Slough?

The structure is 38 ft (11.7 m) long with a longest span of 19 ft (5.9 m) and a deck 26 ft wide.

Who owns Waterfront RD over Slough?

It is owned by the Army.