US Bridges

State Route 49 over Hillside

Good

Sierra County, California · 03-SIE-049-15.69 · Structure no. 13 0025

Built
1986
39 years old
Condition
Good
inspected July 2024
Type
Slab
Concrete
Length
255 ft
14 main spans
Daily traffic
600
2015 count
Owner
State
State Highway Agency

About this bridge

State Route 49 over Hillside is a concrete slab carrying State Route 49 over Hillside in Sierra County, California. It was built in 1986, so it is 39 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 600 vehicles a day, projected to reach 918 by 2046. The structure is 255 ft (77.7 m) long and 8 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesState Route 49
CrossesHillside
Location03-SIE-049-15.69
RouteState Highway 49
Coordinates39.55842, -120.84369
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.7 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20 + Mod
Structure length255 ft (77.7 m)
Longest span18 ft (5.5 m)
Deck width8 ft (2.4 m)
Roadway width28 ft (8.5 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
CrossesOther
Detour if closed14.9 mi (24 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 49 over Hillside built?

It was built in 1986, making it 39 years old in 2025.

What condition is State Route 49 over Hillside in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does State Route 49 over Hillside carry?

About 600 vehicles per day (2015 count).

How long is State Route 49 over Hillside?

The structure is 255 ft (77.7 m) long with a longest span of 18 ft (5.5 m) and a deck 8 ft wide.

Who owns State Route 49 over Hillside?

It is owned by the State Highway Agency.