SR 189 Ramp SW over Mariposa Canyon Wash
GoodSanta Cruz County, Arizona · I-19 & SR189 Junc · Structure no. 20199
- Built
- 2021
- 4 years old
- Condition
- Good
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 947 ft
- 7 main spans
- Daily traffic
- 2,480
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
SR 189 Ramp SW over Mariposa Canyon Wash is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 189 Ramp SW over Mariposa Canyon Wash in Santa Cruz County, Arizona. It was built in 2021, so it is 4 years old, younger than the Arizona average of 47.8 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 2,480 vehicles a day, roughly 10% of them trucks, projected to reach 2,490 by 2042. The structure is 947 ft (288.6 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SR 189 Ramp SW over Mariposa Canyon Wash built?
It was built in 2021, making it 4 years old in 2025.
What condition is SR 189 Ramp SW over Mariposa Canyon Wash 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 February 2024.
How much traffic does SR 189 Ramp SW over Mariposa Canyon Wash carry?
About 2,480 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is SR 189 Ramp SW over Mariposa Canyon Wash?
The structure is 947 ft (288.6 m) long with a longest span of 135 ft (41.1 m) and a deck 31 ft wide.
Who owns SR 189 Ramp SW over Mariposa Canyon Wash?
It is owned by the State Highway Agency.