US Bridges

State Route 104 over State Route 99

Fair

Sacramento County, California · 03-SAC-104-0.01 · Structure no. 24 0144

Built
1958
67 years old
Condition
Fair
inspected November 2024
Type
Tee Beam
Concrete Continuous
Length
208 ft
4 main spans
Daily traffic
8,000
2010 count
Owner
State
State Highway Agency

About this bridge

State Route 104 over State Route 99 is a concrete continuous tee beam carrying State Route 104 over State Route 99 in Sacramento County, California. It was built in 1958, so it is 67 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 6 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 8,000 vehicles a day, roughly 6% of them trucks, projected to reach 8,852 by 2046. The structure is 208 ft (63.5 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesState Route 104
CrossesState Route 99
Location03-SAC-104-0.01
RouteState Highway 104
Coordinates38.29104, -121.31265
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating31.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length208 ft (63.5 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2010)
Projected traffic8,852 by 2046
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was State Route 104 over State Route 99 built?

It was built in 1958, making it 67 years old in 2025.

What condition is State Route 104 over State Route 99 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 November 2024.

How much traffic does State Route 104 over State Route 99 carry?

About 8,000 vehicles per day (2010 count), of which roughly 6% are trucks.

How long is State Route 104 over State Route 99?

The structure is 208 ft (63.5 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns State Route 104 over State Route 99?

It is owned by the State Highway Agency.