US Bridges

Mill ST over BNSF RY AMTRAK UP RR

Fair

San Bernardino County, California · 1.2 MI W/O I-215 · Structure no. 54C0344

Built
1978
47 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,624 ft
18 main spans
Daily traffic
17,461
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mill ST over BNSF RY AMTRAK UP RR is a prestressed concrete stringer/multi-beam or girder carrying Mill ST over BNSF RY AMTRAK UP RR in San Bernardino County, California. It was built in 1978, so it is 47 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 17,461 vehicles a day, roughly 2% of them trucks, projected to reach 18,987 by 2045. The structure is 1,624 ft (495 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMill ST
CrossesBNSF RY AMTRAK UP RR
Location1.2 MI W/O I-215
RouteCity Street 0
CountySan Bernardino County
StateCalifornia
Coordinates34.09203, -117.32389
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating62.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans18
Design loadHS 20
Structure length1,624 ft (495 m)
Longest span102 ft (31.1 m)
Deck width45 ft (13.7 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,461 (2014)
Projected traffic18,987 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway, waterway and railroad
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 Mill ST over BNSF RY AMTRAK UP RR built?

It was built in 1978, making it 47 years old in 2025.

What condition is Mill ST over BNSF RY AMTRAK UP RR 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 November 2023.

How much traffic does Mill ST over BNSF RY AMTRAK UP RR carry?

About 17,461 vehicles per day (2014 count), of which roughly 2% are trucks.

How long is Mill ST over BNSF RY AMTRAK UP RR?

The structure is 1,624 ft (495 m) long with a longest span of 102 ft (31.1 m) and a deck 45 ft wide.

Who owns Mill ST over BNSF RY AMTRAK UP RR?

It is owned by the City or Municipal Highway Agency.