US Bridges

Alum Rock Falls RD over Penitencia Creek

Fair

Santa Clara County, California · 0.2 MI E Penitencia CR RD · Structure no. 37C0752

Built
1925
100 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
36 ft
1 main span
Daily traffic
690
1980 count
Owner
City
City or Municipal Highway Agency

About this bridge

Alum Rock Falls RD over Penitencia Creek is a concrete tee beam carrying Alum Rock Falls RD over Penitencia Creek in Santa Clara County, California. It was built in 1925, so it is 100 years old, older 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 690 vehicles a day, roughly 2% of them trucks, projected to reach 1,128 by 2041. The structure is 36 ft (11 m) long and 22 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesAlum Rock Falls RD
CrossesPenitencia Creek
Location0.2 MI E Penitencia CR RD
RouteCity Street 0
Coordinates37.39471, -121.8109
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating28.5 US tons
Inventory rating17.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic690 (1980)
Projected traffic1,128 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Alum Rock Falls RD over Penitencia Creek built?

It was built in 1925, making it 100 years old in 2025.

What condition is Alum Rock Falls RD over Penitencia 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 2023.

How much traffic does Alum Rock Falls RD over Penitencia Creek carry?

About 690 vehicles per day (1980 count), of which roughly 2% are trucks.

How long is Alum Rock Falls RD over Penitencia Creek?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 22 ft wide.

Who owns Alum Rock Falls RD over Penitencia Creek?

It is owned by the City or Municipal Highway Agency.