SH 21 over Brazos River Relief
GoodBrazos County, Texas · 0.35 MI W of FM 50 · Structure no. 170210011604043
- Built
- 1971
- 54 years old, rebuilt 1986
- Condition
- Good
- inspected February 2023
- Type
- Culvert
- Concrete
- Length
- 23 ft
- 3 main spans
- Daily traffic
- 16,154
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
SH 21 over Brazos River Relief is a concrete culvert carrying SH 21 over Brazos River Relief in Brazos County, Texas. It was built in 1971 and reconstructed in 1986, so it is 54 years old, older 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 16,154 vehicles a day, projected to reach 18,480 by 2031. The structure is 23 ft (7 m) long and 124 ft wide. If it were closed, the detour would be 14.9 mi (24 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 21 over Brazos River Relief built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1986.
What condition is SH 21 over Brazos River Relief 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 2023.
How much traffic does SH 21 over Brazos River Relief carry?
About 16,154 vehicles per day (2020 count).
How long is SH 21 over Brazos River Relief?
The structure is 23 ft (7 m) long with a longest span of 7 ft (2.1 m) and a deck 124 ft wide.
Who owns SH 21 over Brazos River Relief?
It is owned by the State Highway Agency.