US Bridges

E Charleston RD over Adobe Creek

Poor

Santa Clara County, California · Alma ST & Middlefield RD · Structure no. 37C0371

Built
1988
37 years old
Condition
Poor
inspected April 2024
Type
Slab
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
16,500
2015 count
Owner
City
City or Municipal Highway Agency

About this bridge

E Charleston RD over Adobe Creek is a prestressed concrete slab carrying E Charleston RD over Adobe Creek in Santa Clara County, California. It was built in 1988, so it is 37 years old, younger 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.

It carries about 16,500 vehicles a day, roughly 2% of them trucks, projected to reach 21,424 by 2046. The structure is 44 ft (13.4 m) long and 88 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesE Charleston RD
CrossesAdobe Creek
LocationAlma ST & Middlefield RD
RouteCity Street 0
Coordinates37.41839, -122.11278
Functional classUrban Minor Arterial

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span42 ft (12.8 m)
Deck width88 ft (26.8 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,500 (2015)
Projected traffic21,424 by 2046
Trucks2%
Lanes on structure3
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$604,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was E Charleston RD over Adobe Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is E Charleston RD over Adobe Creek 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 April 2024.

How much traffic does E Charleston RD over Adobe Creek carry?

About 16,500 vehicles per day (2015 count), of which roughly 2% are trucks.

How long is E Charleston RD over Adobe Creek?

The structure is 44 ft (13.4 m) long with a longest span of 42 ft (12.8 m) and a deck 88 ft wide.

Who owns E Charleston RD over Adobe Creek?

It is owned by the City or Municipal Highway Agency.