US Bridges

Carmel Mountain RD over State Route 56

Fair

San Diego County, California · 11-SD-056-6.56-SD · Structure no. 57 1071

Built
2004
21 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
254 ft
2 main spans
Daily traffic
2,500
2016 count
Owner
State
State Highway Agency

About this bridge

Carmel Mountain RD over State Route 56 is a prestressed concrete continuous box beam or girders - multiple carrying Carmel Mountain RD over State Route 56 in San Diego County, California. It was built in 2004, so it is 21 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 2,500 vehicles a day, roughly 1% of them trucks, projected to reach 6,307 by 2045. The structure is 254 ft (77.5 m) long and 45 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesCarmel Mountain RD
CrossesState Route 56
Location11-SD-056-6.56-SD
RouteCity Street 0
CountySan Diego County
StateCalifornia
Coordinates32.95505, -117.14677
Functional classUrban Local

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 inspectionMay 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length254 ft (77.5 m)
Longest span131 ft (39.8 m)
Deck width45 ft (13.7 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2016)
Projected traffic6,307 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed0.6 mi (1 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 Carmel Mountain RD over State Route 56 built?

It was built in 2004, making it 21 years old in 2025.

What condition is Carmel Mountain RD over State Route 56 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 2024.

How much traffic does Carmel Mountain RD over State Route 56 carry?

About 2,500 vehicles per day (2016 count), of which roughly 1% are trucks.

How long is Carmel Mountain RD over State Route 56?

The structure is 254 ft (77.5 m) long with a longest span of 131 ft (39.8 m) and a deck 45 ft wide.

Who owns Carmel Mountain RD over State Route 56?

It is owned by the State Highway Agency.