US Bridges

Sierra HWY over Mint Cyn Wash

Fair

Los Angeles County, California · 5.5MI N/O Soledad Cyn RD · Structure no. 53C2031

Built
1997
28 years old
Condition
Fair
inspected August 2024
Type
Slab
Concrete Continuous
Length
79 ft
2 main spans
Daily traffic
8,708
2017 count
Owner
County
County Highway Agency

About this bridge

Sierra HWY over Mint Cyn Wash is a concrete continuous slab carrying Sierra HWY over Mint Cyn Wash in Los Angeles County, California. It was built in 1997, so it is 28 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 8,708 vehicles a day, roughly 3% of them trucks, projected to reach 10,014 by 2043. The structure is 79 ft (24 m) long and 43 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesSierra HWY
CrossesMint Cyn Wash
Location5.5MI N/O Soledad Cyn RD
RouteCounty Highway 7L63
CountyLos Angeles County
StateCalifornia
Coordinates34.47088, -118.39492
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length79 ft (24 m)
Longest span38 ft (11.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,708 (2017)
Projected traffic10,014 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Sierra HWY over Mint Cyn Wash built?

It was built in 1997, making it 28 years old in 2025.

What condition is Sierra HWY over Mint Cyn Wash 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 Sierra HWY over Mint Cyn Wash carry?

About 8,708 vehicles per day (2017 count), of which roughly 3% are trucks.

How long is Sierra HWY over Mint Cyn Wash?

The structure is 79 ft (24 m) long with a longest span of 38 ft (11.7 m) and a deck 43 ft wide.

Who owns Sierra HWY over Mint Cyn Wash?

It is owned by the County Highway Agency.