US Bridges

State Route 79 over Samagatuma Creek

Good

San Diego County, California · 11-SD-079-0.12 · Structure no. 57 0055

Built
1946
79 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
5,900
2020 count
Owner
State
State Highway Agency

About this bridge

State Route 79 over Samagatuma Creek is a concrete continuous slab carrying State Route 79 over Samagatuma Creek in San Diego County, California. It was built in 1946, so it is 79 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 5,900 vehicles a day, roughly 1% of them trucks, projected to reach 9,900 by 2045. The structure is 101 ft (30.8 m) long and 31 ft wide. If it were closed, the detour would be 44.7 mi (72 km).

CarriesState Route 79
CrossesSamagatuma Creek
Location11-SD-079-0.12
RouteState Highway 79
Coordinates32.85399, -116.59539
Functional classRural 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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating42.9 US tons
Inventory rating28.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span36 ft (11 m)
Deck width31 ft (9.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,900 (2020)
Projected traffic9,900 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed44.7 mi (72 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 79 over Samagatuma Creek built?

It was built in 1946, making it 79 years old in 2025.

What condition is State Route 79 over Samagatuma Creek 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 July 2024.

How much traffic does State Route 79 over Samagatuma Creek carry?

About 5,900 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is State Route 79 over Samagatuma Creek?

The structure is 101 ft (30.8 m) long with a longest span of 36 ft (11 m) and a deck 31 ft wide.

Who owns State Route 79 over Samagatuma Creek?

It is owned by the State Highway Agency.