US Bridges

Mountain Avenue over State Route 210

Fair

San Bernardino County, California · 08-SBD-210-1.50-UPL · Structure no. 54 1144

Built
2001
24 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
264 ft
2 main spans
Daily traffic
25,000
2014 count
Owner
State
State Highway Agency

About this bridge

Mountain Avenue over State Route 210 is a prestressed concrete continuous box beam or girders - multiple carrying Mountain Avenue over State Route 210 in San Bernardino County, California. It was built in 2001, so it is 24 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 25,000 vehicles a day, roughly 5% of them trucks, projected to reach 27,545 by 2046. The structure is 264 ft (80.4 m) long and 100 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMountain Avenue
CrossesState Route 210
Location08-SBD-210-1.50-UPL
RouteCity Street 0
CountySan Bernardino County
StateCalifornia
Coordinates34.13506, -117.67053
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
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 + Mod
Structure length264 ft (80.4 m)
Longest span140 ft (42.6 m)
Deck width100 ft (30.6 m)
Roadway width87 ft (26.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2014)
Projected traffic27,545 by 2046
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 Mountain Avenue over State Route 210 built?

It was built in 2001, making it 24 years old in 2025.

What condition is Mountain Avenue over State Route 210 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 August 2024.

How much traffic does Mountain Avenue over State Route 210 carry?

About 25,000 vehicles per day (2014 count), of which roughly 5% are trucks.

How long is Mountain Avenue over State Route 210?

The structure is 264 ft (80.4 m) long with a longest span of 140 ft (42.6 m) and a deck 100 ft wide.

Who owns Mountain Avenue over State Route 210?

It is owned by the State Highway Agency.