US Bridges

Mission Center RD over Interstate 8

Good

San Diego County, California · 11-SD-008-3.04-SD · Structure no. 57 0920

Built
1978
47 years old
Condition
Good
inspected March 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
313 ft
2 main spans
Daily traffic
25,000
2014 count
Owner
State
State Highway Agency

About this bridge

Mission Center RD over Interstate 8 is a prestressed concrete continuous box beam or girders - multiple carrying Mission Center RD over Interstate 8 in San Diego County, California. It was built in 1978, so it is 47 years old, younger 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 25,000 vehicles a day, roughly 2% of them trucks, projected to reach 36,064 by 2042. The structure is 313 ft (95.4 m) long and 82 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMission Center RD
CrossesInterstate 8
Location11-SD-008-3.04-SD
RouteCity Street 0S327
Coordinates32.76583, -117.15364
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length313 ft (95.4 m)
Longest span161 ft (49.1 m)
Deck width82 ft (24.9 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2014)
Projected traffic36,064 by 2042
Trucks2%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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 Mission Center RD over Interstate 8 built?

It was built in 1978, making it 47 years old in 2025.

What condition is Mission Center RD 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 March 2024.

How much traffic does Mission Center RD over Interstate 8 carry?

About 25,000 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Mission Center RD over Interstate 8?

The structure is 313 ft (95.4 m) long with a longest span of 161 ft (49.1 m) and a deck 82 ft wide.

Who owns Mission Center RD over Interstate 8?

It is owned by the State Highway Agency.