FM 521 over Drainage Ditch
FairHarris County, Texas · 3.0 MI S of IH 610 · Structure no. 121020011101002
- Built
- 1925
- 100 years old, rebuilt 1979
- Condition
- Fair
- inspected August 2024
- Type
- Culvert
- Concrete
- Length
- 36 ft
- 3 main spans
- Daily traffic
- 19,672
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
FM 521 over Drainage Ditch is a concrete culvert carrying FM 521 over Drainage Ditch in Harris County, Texas. It was built in 1925 and reconstructed in 1979, so it is 100 years old, older 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 19,672 vehicles a day, roughly 5% of them trucks, projected to reach 29,170 by 2033. The structure is 36 ft (11 m) long and 95 ft wide.
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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was FM 521 over Drainage Ditch built?
It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1979.
What condition is FM 521 over Drainage Ditch 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 August 2024.
How much traffic does FM 521 over Drainage Ditch carry?
About 19,672 vehicles per day (2020 count), of which roughly 5% are trucks.
How long is FM 521 over Drainage Ditch?
The structure is 36 ft (11 m) long with a longest span of 10 ft (3 m) and a deck 95 ft wide.
Who owns FM 521 over Drainage Ditch?
It is owned by the State Highway Agency.