US Bridges

Interstate 5 over Moonlit Oaks Ave

Fair

Siskiyou County, California · 02-SIS-005-R45.62-YRE · Structure no. 02 0159L

Built
1970
55 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
112 ft
1 main span
Daily traffic
8,300
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 5 over Moonlit Oaks Ave is a prestressed concrete box beam or girders - multiple carrying Interstate 5 over Moonlit Oaks Ave in Siskiyou County, California. It was built in 1970, so it is 55 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 6 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 8,300 vehicles a day, roughly 25% of them trucks, projected to reach 12,464 by 2046. The structure is 112 ft (34 m) long and 41 ft wide.

CarriesInterstate 5
CrossesMoonlit Oaks Ave
Location02-SIS-005-R45.62-YRE
RouteInterstate 5
Coordinates41.7038, -122.64305
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating32.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length112 ft (34 m)
Longest span112 ft (34 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,300 (2020)
Projected traffic12,464 by 2046
Trucks25%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 5 over Moonlit Oaks Ave built?

It was built in 1970, making it 55 years old in 2025.

What condition is Interstate 5 over Moonlit Oaks Ave 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 January 2024.

How much traffic does Interstate 5 over Moonlit Oaks Ave carry?

About 8,300 vehicles per day (2020 count), of which roughly 25% are trucks.

How long is Interstate 5 over Moonlit Oaks Ave?

The structure is 112 ft (34 m) long with a longest span of 112 ft (34 m) and a deck 41 ft wide.

Who owns Interstate 5 over Moonlit Oaks Ave?

It is owned by the State Highway Agency.