US Bridges

Mt Vernon Ave over Lytle Creek

Fair

San Bernardino County, California · .80 MI S of SR 66 · Structure no. 54C0361

Built
1973
52 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete Continuous
Length
103 ft
2 main spans
Daily traffic
7,020
2016 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mt Vernon Ave over Lytle Creek is a concrete continuous tee beam carrying Mt Vernon Ave over Lytle Creek in San Bernardino County, California. It was built in 1973, so it is 52 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 7,020 vehicles a day, roughly 10% of them trucks, projected to reach 13,237 by 2046. The structure is 103 ft (31.4 m) long and 66 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMt Vernon Ave
CrossesLytle Creek
Location.80 MI S of SR 66
RouteCity Street 0
Coordinates34.09705, -117.31374
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating47.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length103 ft (31.4 m)
Longest span50 ft (15.2 m)
Deck width66 ft (20 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,020 (2016)
Projected traffic13,237 by 2046
Trucks10%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 Mt Vernon Ave over Lytle Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Mt Vernon Ave over Lytle Creek 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 January 2024.

How much traffic does Mt Vernon Ave over Lytle Creek carry?

About 7,020 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is Mt Vernon Ave over Lytle Creek?

The structure is 103 ft (31.4 m) long with a longest span of 50 ft (15.2 m) and a deck 66 ft wide.

Who owns Mt Vernon Ave over Lytle Creek?

It is owned by the City or Municipal Highway Agency.