US Bridges

U.S. Highway 199 over Smith River

Good

Del Norte County, California · 01-DN-199-4.22 · Structure no. 01 0006

Built
1990
35 years old
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
684 ft
3 main spans
Daily traffic
4,300
2009 count
Owner
State
State Highway Agency

About this bridge

U.S. Highway 199 over Smith River is a prestressed concrete continuous box beam or girders - multiple carrying U.S. Highway 199 over Smith River in Del Norte County, California. It was built in 1990, so it is 35 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 4,300 vehicles a day, roughly 11% of them trucks, projected to reach 6,019 by 2042. The structure is 684 ft (208.5 m) long and 40 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesU.S. Highway 199
CrossesSmith River
Location01-DN-199-4.22
RouteU.S. Route 199
Coordinates41.80669, -124.08254
Functional classRural Principal Arterial - Other

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length684 ft (208.5 m)
Longest span350 ft (106.7 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2009)
Projected traffic6,019 by 2042
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

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 U.S. Highway 199 over Smith River built?

It was built in 1990, making it 35 years old in 2025.

What condition is U.S. Highway 199 over Smith River 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 September 2024.

How much traffic does U.S. Highway 199 over Smith River carry?

About 4,300 vehicles per day (2009 count), of which roughly 11% are trucks.

How long is U.S. Highway 199 over Smith River?

The structure is 684 ft (208.5 m) long with a longest span of 350 ft (106.7 m) and a deck 40 ft wide.

Who owns U.S. Highway 199 over Smith River?

It is owned by the State Highway Agency.