US Bridges

Lake Murray Blvd over Interstate 8

Good

San Diego County, California · 11-SD-008-9.59-LMSA · Structure no. 57 0341

Built
1957
68 years old
Condition
Good
inspected April 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
250 ft
4 main spans
Daily traffic
19,200
2014 count
Owner
State
State Highway Agency

About this bridge

Lake Murray Blvd over Interstate 8 is a steel stringer/multi-beam or girder carrying Lake Murray Blvd over Interstate 8 in San Diego County, California. It was built in 1957, so it is 68 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 19,200 vehicles a day, roughly 4% of them trucks, projected to reach 26,018 by 2039. The structure is 250 ft (76.2 m) long and 70 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesLake Murray Blvd
CrossesInterstate 8
Location11-SD-008-9.59-LMSA
RouteCity Street 0S271
Coordinates32.77451, -117.04588
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating45.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span81 ft (24.7 m)
Deck width70 ft (21.3 m)
Roadway width62 ft (19 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,200 (2014)
Projected traffic26,018 by 2039
Trucks4%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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 Lake Murray Blvd over Interstate 8 built?

It was built in 1957, making it 68 years old in 2025.

What condition is Lake Murray Blvd over Interstate 8 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2022.

How much traffic does Lake Murray Blvd over Interstate 8 carry?

About 19,200 vehicles per day (2014 count), of which roughly 4% are trucks.

How long is Lake Murray Blvd over Interstate 8?

The structure is 250 ft (76.2 m) long with a longest span of 81 ft (24.7 m) and a deck 70 ft wide.

Who owns Lake Murray Blvd over Interstate 8?

It is owned by the State Highway Agency.