Mack Road over State Route 99
FairSacramento County, California · 03-SAC-099-17.66-SAC · Structure no. 24 0135
- Built
- 1959
- 66 years old, rebuilt 1984
- Condition
- Fair
- inspected February 2024
- Type
- Box Beam or Girders - Multiple
- Concrete Continuous
- Length
- 273 ft
- 4 main spans
- Daily traffic
- 44,250
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
Mack Road over State Route 99 is a concrete continuous box beam or girders - multiple carrying Mack Road over State Route 99 in Sacramento County, California. It was built in 1959 and reconstructed in 1984, so it is 66 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 44,250 vehicles a day, roughly 2% of them trucks, projected to reach 96,083 by 2042. The structure is 273 ft (83.3 m) long and 88 ft wide. If it were closed, the detour would be 6.2 mi (10 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mack Road over State Route 99 built?
It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1984.
What condition is Mack Road 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 February 2024.
How much traffic does Mack Road over State Route 99 carry?
About 44,250 vehicles per day (2019 count), of which roughly 2% are trucks.
How long is Mack Road over State Route 99?
The structure is 273 ft (83.3 m) long with a longest span of 110 ft (33.4 m) and a deck 88 ft wide.
Who owns Mack Road over State Route 99?
It is owned by the State Highway Agency.