US Bridges

Interstate 15 NB over Rainbow Glen Road

Fair

San Diego County, California · 11-SD-015-R52.11 · Structure no. 57 0898R

Built
1985
40 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
108 ft
1 main span
Daily traffic
72,000
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 15 NB over Rainbow Glen Road is a prestressed concrete box beam or girders - multiple carrying Interstate 15 NB over Rainbow Glen Road in San Diego County, California. It was built in 1985, so it is 40 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 72,000 vehicles a day, roughly 4% of them trucks, projected to reach 144,000 by 2045. The structure is 108 ft (32.9 m) long and 69 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesInterstate 15 NB
CrossesRainbow Glen Road
Location11-SD-015-R52.11
RouteInterstate 15
CountySan Diego County
StateCalifornia
Coordinates33.40696, -117.16427
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
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 inspectionJune 2024
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 rating50 US tons
Inventory rating37.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length108 ft (32.9 m)
Longest span106 ft (32.3 m)
Deck width69 ft (21 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,000 (2020)
Projected traffic144,000 by 2045
Trucks4%
Lanes on structure4
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 15 NB over Rainbow Glen Road built?

It was built in 1985, making it 40 years old in 2025.

What condition is Interstate 15 NB over Rainbow Glen Road 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 June 2024.

How much traffic does Interstate 15 NB over Rainbow Glen Road carry?

About 72,000 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Interstate 15 NB over Rainbow Glen Road?

The structure is 108 ft (32.9 m) long with a longest span of 106 ft (32.3 m) and a deck 69 ft wide.

Who owns Interstate 15 NB over Rainbow Glen Road?

It is owned by the State Highway Agency.