FM 1660 over San Gabriel River
FairWilliamson County, Texas · 0.30 MI S of SH 29 · Structure no. 142460156601006
- Built
- 1987
- 38 years old
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 505 ft
- 7 main spans
- Daily traffic
- 2,616
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
FM 1660 over San Gabriel River is a prestressed concrete stringer/multi-beam or girder carrying FM 1660 over San Gabriel River in Williamson County, Texas. It was built in 1987, so it is 38 years old, younger than the Texas average of 44.4 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 2,616 vehicles a day, roughly 15% of them trucks, projected to reach 2,481 by 2041. The structure is 505 ft (153.9 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM 1660 over San Gabriel River built?
It was built in 1987, making it 38 years old in 2025.
What condition is FM 1660 over San Gabriel River 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 March 2023.
How much traffic does FM 1660 over San Gabriel River carry?
About 2,616 vehicles per day (2023 count), of which roughly 15% are trucks.
How long is FM 1660 over San Gabriel River?
The structure is 505 ft (153.9 m) long with a longest span of 75 ft (22.9 m) and a deck 30 ft wide.
Who owns FM 1660 over San Gabriel River?
It is owned by the State Highway Agency.