US Bridges

State Route 299 over Pit River

Fair

Lassen County, California · 02-LAS-299-14.06 · Structure no. 07 0007

Built
1925
100 years old, rebuilt 1986
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete Continuous
Length
211 ft
7 main spans
Daily traffic
1,800
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 299 over Pit River is a concrete continuous tee beam carrying State Route 299 over Pit River in Lassen County, California. It was built in 1925 and reconstructed in 1986, so it is 100 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 1,800 vehicles a day, roughly 20% of them trucks, projected to reach 2,040 by 2040. The structure is 211 ft (64.2 m) long and 44 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesState Route 299
CrossesPit River
Location02-LAS-299-14.06
RouteState Highway 299
CountyLassen County
StateCalifornia
Coordinates41.12107, -121.14547
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.8 US tons
Inventory rating28.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadH 15
Structure length211 ft (64.2 m)
Longest span30 ft (9.1 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2009)
Projected traffic2,040 by 2040
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 299 over Pit River built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1986.

What condition is State Route 299 over Pit River 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 May 2023.

How much traffic does State Route 299 over Pit River carry?

About 1,800 vehicles per day (2009 count), of which roughly 20% are trucks.

How long is State Route 299 over Pit River?

The structure is 211 ft (64.2 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.

Who owns State Route 299 over Pit River?

It is owned by the State Highway Agency.