US Bridges

Treasure Isd RD NB over Treasure Isd RD SB

Poor

San Francisco County, California · NB Ti RD to 80 WB on Ramp · Structure no. 34C0077

Built
1964
61 years old
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
187 ft
5 main spans
Daily traffic
1,500
2020 count
Owner
County
County Highway Agency

About this bridge

Treasure Isd RD NB over Treasure Isd RD SB is a steel stringer/multi-beam or girder carrying Treasure Isd RD NB over Treasure Isd RD SB in San Francisco County, California. It was built in 1964, so it is 61 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.

It carries about 1,500 vehicles a day, roughly 3% of them trucks, projected to reach 4,500 by 2040. The structure is 187 ft (57 m) long and 21 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesTreasure Isd RD NB
CrossesTreasure Isd RD SB
LocationNB Ti RD to 80 WB on Ramp
RouteCity Street 0
CountySan Francisco County
StateCalifornia
Coordinates37.80853, -122.36689
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length187 ft (57 m)
Longest span36 ft (11.1 m)
Deck width21 ft (6.3 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2020)
Projected traffic4,500 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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$574,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Treasure Isd RD NB over Treasure Isd RD SB built?

It was built in 1964, making it 61 years old in 2025.

What condition is Treasure Isd RD NB over Treasure Isd RD SB 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 2023.

How much traffic does Treasure Isd RD NB over Treasure Isd RD SB carry?

About 1,500 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Treasure Isd RD NB over Treasure Isd RD SB?

The structure is 187 ft (57 m) long with a longest span of 36 ft (11.1 m) and a deck 21 ft wide.

Who owns Treasure Isd RD NB over Treasure Isd RD SB?

It is owned by the County Highway Agency.