US Bridges

State Route 299 over Old Oregon Trail

Good

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

Built
1974
51 years old
Condition
Good
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 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 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 1.9 mi (3 km).

CarriesState Route 299
CrossesOld Oregon Trail
Location02-SHA-299-27.22
RouteState Highway 299
Coordinates40.62081, -122.31905
Functional classUrban Other Principal 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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating32.2 US tons

Structure

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 closed1.9 mi (3 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 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 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.