US Bridges

MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl

Fair

Alameda County, California · 04-ALA-580-R39.15-OAK · Structure no. 33 0347S

Built
1965
60 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
290 ft
3 main spans
Daily traffic
9,137
2014 count
Owner
State
State Highway Agency

About this bridge

MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl is a concrete continuous box beam or girders - multiple carrying MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl in Alameda County, California. It was built in 1965, so it is 60 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 9,137 vehicles a day, roughly 1% of them trucks, projected to reach 10,688 by 2041. The structure is 290 ft (88.4 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMOUNTAIN-580 on Rp
CrossesSR 13 NB Mountain Bl
Location04-ALA-580-R39.15-OAK
RouteInterstate 580
CountyAlameda County
StateCalifornia
Coordinates37.78369, -122.17665
Functional classUrban Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating47.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length290 ft (88.4 m)
Longest span123 ft (37.5 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,137 (2014)
Projected traffic10,688 by 2041
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl built?

It was built in 1965, making it 60 years old in 2025.

What condition is MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl 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 September 2023.

How much traffic does MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl carry?

About 9,137 vehicles per day (2014 count), of which roughly 1% are trucks.

How long is MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl?

The structure is 290 ft (88.4 m) long with a longest span of 123 ft (37.5 m) and a deck 32 ft wide.

Who owns MOUNTAIN-580 on Rp over SR 13 NB Mountain Bl?

It is owned by the State Highway Agency.