US Bridges

Imperial HWY over North Frk Coyote CR

Fair

Los Angeles County, California · 1.0MI S/O Telegraph RD · Structure no. 53C0465

Built
1960
65 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
128 ft
2 main spans
Daily traffic
50,042
2013 count
Owner
County
County Highway Agency

About this bridge

Imperial HWY over North Frk Coyote CR is a steel stringer/multi-beam or girder carrying Imperial HWY over North Frk Coyote CR in Los Angeles 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 50,042 vehicles a day, roughly 5% of them trucks, projected to reach 60,050 by 2043. The structure is 128 ft (39 m) long and 93 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesImperial HWY
CrossesNorth Frk Coyote CR
Location1.0MI S/O Telegraph RD
RouteCounty Highway 0L100
CountyLos Angeles County
StateCalifornia
Coordinates33.91693, -118.03851
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
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 inspectionOctober 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.3 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length128 ft (39 m)
Longest span62 ft (18.9 m)
Deck width93 ft (28.2 m)
Roadway width65 ft (19.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,042 (2013)
Projected traffic60,050 by 2043
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Imperial HWY over North Frk Coyote CR built?

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

What condition is Imperial HWY over North Frk Coyote CR 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 Imperial HWY over North Frk Coyote CR carry?

About 50,042 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Imperial HWY over North Frk Coyote CR?

The structure is 128 ft (39 m) long with a longest span of 62 ft (18.9 m) and a deck 93 ft wide.

Who owns Imperial HWY over North Frk Coyote CR?

It is owned by the County Highway Agency.