SH 99 over Willow Flats
GoodHarris County, Texas · 3.50 MI W of SH 249 · Structure no. 121020351006184
- Built
- 2015
- 10 years old
- Condition
- Good
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 2,280 ft
- 19 main spans
- Daily traffic
- 4,000
- 2015 count
- Owner
- State
- State Highway Agency
About this bridge
SH 99 over Willow Flats is a prestressed concrete stringer/multi-beam or girder carrying SH 99 over Willow Flats in Harris County, Texas. It was built in 2015, so it is 10 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 4,000 vehicles a day, roughly 5% of them trucks, projected to reach 6,000 by 2035. The structure is 2,280 ft (694.9 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 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 |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| 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 SH 99 over Willow Flats built?
It was built in 2015, making it 10 years old in 2025.
What condition is SH 99 over Willow Flats 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 October 2024.
How much traffic does SH 99 over Willow Flats carry?
About 4,000 vehicles per day (2015 count), of which roughly 5% are trucks.
How long is SH 99 over Willow Flats?
The structure is 2,280 ft (694.9 m) long with a longest span of 120 ft (36.6 m) and a deck 80 ft wide.
Who owns SH 99 over Willow Flats?
It is owned by the State Highway Agency.