US Bridges

State Route 299 over Old Oregon Trail

Fair

Shasta County, California · 02-SHA-299-27.22 · Structure no. 06 0178R

Built
1974
51 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
148 ft
1 main span
Daily traffic
6,250
2009 count
Owner
State
State Highway Agency

About this bridge

State Route 299 over Old Oregon Trail is a prestressed concrete box beam or girders - multiple carrying State Route 299 over Old Oregon Trail in Shasta County, California. It was built in 1974, so it is 51 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 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 6,250 vehicles a day, roughly 8% of them trucks, projected to reach 8,120 by 2041. The structure is 148 ft (45.1 m) long and 41 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesState Route 299
CrossesOld Oregon Trail
Location02-SHA-299-27.22
RouteState Highway 299
CountyShasta County
StateCalifornia
Coordinates40.62056, -122.31889
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating42.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length148 ft (45.1 m)
Longest span146 ft (44.5 m)
Deck width41 ft (12.5 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,250 (2009)
Projected traffic8,120 by 2041
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 299 over Old Oregon Trail built?

It was built in 1974, making it 51 years old in 2025.

What condition is State Route 299 over Old Oregon Trail 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 April 2023.

How much traffic does State Route 299 over Old Oregon Trail carry?

About 6,250 vehicles per day (2009 count), of which roughly 8% are trucks.

How long is State Route 299 over Old Oregon Trail?

The structure is 148 ft (45.1 m) long with a longest span of 146 ft (44.5 m) and a deck 41 ft wide.

Who owns State Route 299 over Old Oregon Trail?

It is owned by the State Highway Agency.