SH 121 SB over Alma Drive
GoodCollin County, Texas · 1.6 MI NE of FM 2478 · Structure no. 180430036404441
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 330 ft
- 4 main spans
- Daily traffic
- 22,796
- 2018 count
- Owner
- Toll Authority
- Local Toll Authority
About this bridge
SH 121 SB over Alma Drive is a prestressed concrete stringer/multi-beam or girder carrying SH 121 SB over Alma Drive in Collin County, Texas. It was built in 2009, so it is 16 years old, younger than the Texas average of 44.4 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 22,796 vehicles a day, roughly 6% of them trucks, projected to reach 31,915 by 2038. The structure is 330 ft (100.6 m) long and 70 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 121 SB over Alma Drive built?
It was built in 2009, making it 16 years old in 2025.
What condition is SH 121 SB over Alma Drive 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 December 2023.
How much traffic does SH 121 SB over Alma Drive carry?
About 22,796 vehicles per day (2018 count), of which roughly 6% are trucks.
How long is SH 121 SB over Alma Drive?
The structure is 330 ft (100.6 m) long with a longest span of 90 ft (27.4 m) and a deck 70 ft wide.
Who owns SH 121 SB over Alma Drive?
It is owned by the Local Toll Authority.