I-17 SB over Lone Mountain RD (L303)
GoodMaricopa County, Arizona · 2.0 MI S JCT SR 74 · Structure no. 02878
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected January 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete Continuous
- Length
- 201 ft
- 2 main spans
- Daily traffic
- 62,351
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
I-17 SB over Lone Mountain RD (L303) is a prestressed concrete continuous box beam or girders - single or spread carrying I-17 SB over Lone Mountain RD (L303) in Maricopa County, Arizona. It was built in 2009, so it is 16 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 62,351 vehicles a day, roughly 4% of them trucks, projected to reach 62,361 by 2042. The structure is 201 ft (61.3 m) long and 89 ft wide.
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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I-17 SB over Lone Mountain RD (L303) built?
It was built in 2009, making it 16 years old in 2025.
What condition is I-17 SB over Lone Mountain RD (L303) 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 January 2024.
How much traffic does I-17 SB over Lone Mountain RD (L303) carry?
About 62,351 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is I-17 SB over Lone Mountain RD (L303)?
The structure is 201 ft (61.3 m) long with a longest span of 98 ft (29.9 m) and a deck 89 ft wide.
Who owns I-17 SB over Lone Mountain RD (L303)?
It is owned by the State Highway Agency.