US Bridges

Glenside DR over Las Trampas Creek

Fair

Contra Costa County, California · 0.1 M E ST Marys RD · Structure no. 28C0167

Built
1980
45 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
95 ft
1 main span
Daily traffic
2,000
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

Glenside DR over Las Trampas Creek is a prestressed concrete stringer/multi-beam or girder carrying Glenside DR over Las Trampas Creek in Contra Costa County, California. It was built in 1980, so it is 45 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 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 2,000 vehicles a day, roughly 2% of them trucks, projected to reach 3,304 by 2042. The structure is 95 ft (29 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesGlenside DR
CrossesLas Trampas Creek
Location0.1 M E ST Marys RD
RouteCity Street 0
CountyContra Costa County
StateCalifornia
Coordinates37.87981, -122.10102
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment6: Equal to present minimum criteria
Operating rating87.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length95 ft (29 m)
Longest span91 ft (27.7 m)
Deck width36 ft (11.1 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2011)
Projected traffic3,304 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 Glenside DR over Las Trampas Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Glenside DR over Las Trampas 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 December 2023.

How much traffic does Glenside DR over Las Trampas Creek carry?

About 2,000 vehicles per day (2011 count), of which roughly 2% are trucks.

How long is Glenside DR over Las Trampas Creek?

The structure is 95 ft (29 m) long with a longest span of 91 ft (27.7 m) and a deck 36 ft wide.

Who owns Glenside DR over Las Trampas Creek?

It is owned by the City or Municipal Highway Agency.