US Bridges

State Route 89 over Truckee River

Poor

Placer County, California · 03-PLA-089-8.48 · Structure no. 19 0033

Built
1928
97 years old
Condition
Poor
inspected June 2023
Type
Tee Beam
Concrete
Length
122 ft
4 main spans
Daily traffic
11,100
2017 count
Owner
State
State Highway Agency

About this bridge

State Route 89 over Truckee River is a concrete tee beam carrying State Route 89 over Truckee River in Placer County, California. It was built in 1928, so it is 97 years old, older than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 11,100 vehicles a day, roughly 6% of them trucks, projected to reach 12,200 by 2040. The structure is 122 ft (37.2 m) long and 36 ft wide. If it were closed, the detour would be 49.1 mi (79 km).

CarriesState Route 89
CrossesTruckee River
Location03-PLA-089-8.48
RouteState Highway 89
Coordinates39.16671, -120.14421
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length122 ft (37.2 m)
Longest span30 ft (9.1 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,100 (2017)
Projected traffic12,200 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed49.1 mi (79 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.6 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was State Route 89 over Truckee River built?

It was built in 1928, making it 97 years old in 2025.

What condition is State Route 89 over Truckee River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does State Route 89 over Truckee River carry?

About 11,100 vehicles per day (2017 count), of which roughly 6% are trucks.

How long is State Route 89 over Truckee River?

The structure is 122 ft (37.2 m) long with a longest span of 30 ft (9.1 m) and a deck 36 ft wide.

Who owns State Route 89 over Truckee River?

It is owned by the State Highway Agency.