SH 99 NB over Clay RD & Mayde Crk
GoodHarris County, Texas · 3.2 MI N of IH 10 · Structure no. 121020351005074
- Built
- 2014
- 11 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 2,317 ft
- 15 main spans
- Daily traffic
- 9,000
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
SH 99 NB over Clay RD & Mayde Crk is a prestressed concrete stringer/multi-beam or girder carrying SH 99 NB over Clay RD & Mayde Crk in Harris County, Texas. It was built in 2014, so it is 11 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 9,000 vehicles a day, projected to reach 14,060 by 2030. The structure is 2,317 ft (706.2 m) long and 44 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 NB over Clay RD & Mayde Crk built?
It was built in 2014, making it 11 years old in 2025.
What condition is SH 99 NB over Clay RD & Mayde Crk 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 August 2024.
How much traffic does SH 99 NB over Clay RD & Mayde Crk carry?
About 9,000 vehicles per day (2010 count).
How long is SH 99 NB over Clay RD & Mayde Crk?
The structure is 2,317 ft (706.2 m) long with a longest span of 147 ft (44.8 m) and a deck 44 ft wide.
Who owns SH 99 NB over Clay RD & Mayde Crk?
It is owned by the State Highway Agency.