US Bridges

Ingraham ST S/B over Mission Bay Channel

Fair

San Diego County, California · 0.3MI N/O Mission Bay DR · Structure no. 57C0310L

Built
1987
38 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,187 ft
9 main spans
Daily traffic
17,700
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Ingraham ST S/B over Mission Bay Channel is a prestressed concrete continuous stringer/multi-beam or girder carrying Ingraham ST S/B over Mission Bay Channel in San Diego County, California. It was built in 1987, so it is 38 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 6 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 17,700 vehicles a day, roughly 2% of them trucks, projected to reach 27,442 by 2045. The structure is 1,187 ft (361.8 m) long and 44 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesIngraham ST S/B
CrossesMission Bay Channel
Location0.3MI N/O Mission Bay DR
RouteCity Street 0
CountySan Diego County
StateCalifornia
Coordinates32.76895, -117.23391
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length1,187 ft (361.8 m)
Longest span132 ft (40.2 m)
Deck width44 ft (13.4 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,700 (2016)
Projected traffic27,442 by 2045
Trucks2%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Ingraham ST S/B over Mission Bay Channel built?

It was built in 1987, making it 38 years old in 2025.

What condition is Ingraham ST S/B over Mission Bay Channel 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 October 2023.

How much traffic does Ingraham ST S/B over Mission Bay Channel carry?

About 17,700 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Ingraham ST S/B over Mission Bay Channel?

The structure is 1,187 ft (361.8 m) long with a longest span of 132 ft (40.2 m) and a deck 44 ft wide.

Who owns Ingraham ST S/B over Mission Bay Channel?

It is owned by the City or Municipal Highway Agency.