US Bridges

State Route 49 over Ladies Canyon Creek

Fair

Sierra County, California · 03-SIE-049-24.03 · Structure no. 13 0006

Built
1932
93 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
23 ft
1 main span
Daily traffic
600
2015 count
Owner
State
State Highway Agency

About this bridge

State Route 49 over Ladies Canyon Creek is a steel stringer/multi-beam or girder carrying State Route 49 over Ladies Canyon Creek in Sierra County, California. It was built in 1932, so it is 93 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 600 vehicles a day, projected to reach 918 by 2046. The structure is 23 ft (7 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesState Route 49
CrossesLadies Canyon Creek
Location03-SIE-049-24.03
RouteState Highway 49
Coordinates39.56893, -120.72197
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.5 US tons
Inventory rating46.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span22 ft (6.6 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2015)
Projected traffic918 by 2046
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 49 over Ladies Canyon Creek built?

It was built in 1932, making it 93 years old in 2025.

What condition is State Route 49 over Ladies Canyon 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 July 2024.

How much traffic does State Route 49 over Ladies Canyon Creek carry?

About 600 vehicles per day (2015 count).

How long is State Route 49 over Ladies Canyon Creek?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.6 m) and a deck 27 ft wide.

Who owns State Route 49 over Ladies Canyon Creek?

It is owned by the State Highway Agency.