US Bridges

Interstate 505 NB over County Road 12

Fair

Yolo County, California · 03-YOL-505-20.11 · Structure no. 22 0166R

Built
1977
48 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
97 ft
1 main span
Daily traffic
7,000
2010 count
Owner
State
State Highway Agency

About this bridge

Interstate 505 NB over County Road 12 is a prestressed concrete box beam or girders - multiple carrying Interstate 505 NB over County Road 12 in Yolo County, California. It was built in 1977, so it is 48 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 7,000 vehicles a day, roughly 27% of them trucks, projected to reach 9,151 by 2041. The structure is 97 ft (29.5 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 505 NB
CrossesCounty Road 12
Location03-YOL-505-20.11
RouteInterstate 505
CountyYolo County
StateCalifornia
Coordinates38.81535, -121.93875
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating39.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length97 ft (29.5 m)
Longest span95 ft (29 m)
Deck width42 ft (12.8 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2010)
Projected traffic9,151 by 2041
Trucks27%
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 Interstate 505 NB over County Road 12 built?

It was built in 1977, making it 48 years old in 2025.

What condition is Interstate 505 NB over County Road 12 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 May 2023.

How much traffic does Interstate 505 NB over County Road 12 carry?

About 7,000 vehicles per day (2010 count), of which roughly 27% are trucks.

How long is Interstate 505 NB over County Road 12?

The structure is 97 ft (29.5 m) long with a longest span of 95 ft (29 m) and a deck 42 ft wide.

Who owns Interstate 505 NB over County Road 12?

It is owned by the State Highway Agency.