US Bridges

9th ST over Twin Warm Creek

Fair

San Bernardino County, California · 0.7 MI E Waterman Ave · Structure no. 54C0364

Built
1960
65 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
138 ft
2 main spans
Daily traffic
12,500
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

9th ST over Twin Warm Creek is a steel stringer/multi-beam or girder carrying 9th ST over Twin Warm Creek in San Bernardino County, California. It was built in 1960, so it is 65 years old, older 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 12,500 vehicles a day, roughly 3% of them trucks, projected to reach 15,033 by 2046. The structure is 138 ft (42 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries9th ST
CrossesTwin Warm Creek
Location0.7 MI E Waterman Ave
RouteCity Street 0
CountySan Bernardino County
StateCalifornia
Coordinates34.11567, -117.26706
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.4 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length138 ft (42 m)
Longest span74 ft (22.5 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2024)
Projected traffic15,033 by 2046
Trucks3%
Lanes on structure4
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 9th ST over Twin Warm Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is 9th ST over Twin Warm 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 February 2024.

How much traffic does 9th ST over Twin Warm Creek carry?

About 12,500 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is 9th ST over Twin Warm Creek?

The structure is 138 ft (42 m) long with a longest span of 74 ft (22.5 m) and a deck 76 ft wide.

Who owns 9th ST over Twin Warm Creek?

It is owned by the City or Municipal Highway Agency.