US Bridges

Interstate 505 NB over Wolfskill RD

Fair

Solano County, California · 04-SOL-505-R8.55 · Structure no. 23 0170R

Built
1974
51 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
89 ft
1 main span
Daily traffic
11,400
2009 count
Owner
State
State Highway Agency

About this bridge

Interstate 505 NB over Wolfskill RD is a prestressed concrete box beam or girders - multiple carrying Interstate 505 NB over Wolfskill RD in Solano County, California. It was built in 1974, so it is 51 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 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 11,400 vehicles a day, roughly 10% of them trucks, projected to reach 18,962 by 2046. The structure is 89 ft (27.1 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesInterstate 505 NB
CrossesWolfskill RD
Location04-SOL-505-R8.55
RouteInterstate 505
Coordinates38.49579, -121.94951
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length89 ft (27.1 m)
Longest span88 ft (26.8 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,400 (2009)
Projected traffic18,962 by 2046
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 Interstate 505 NB over Wolfskill RD built?

It was built in 1974, making it 51 years old in 2025.

What condition is Interstate 505 NB over Wolfskill RD 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 April 2024.

How much traffic does Interstate 505 NB over Wolfskill RD carry?

About 11,400 vehicles per day (2009 count), of which roughly 10% are trucks.

How long is Interstate 505 NB over Wolfskill RD?

The structure is 89 ft (27.1 m) long with a longest span of 88 ft (26.8 m) and a deck 42 ft wide.

Who owns Interstate 505 NB over Wolfskill RD?

It is owned by the State Highway Agency.