SH 123 over Manka Lake Slough
GoodKarnes County, Texas · 3.8 MI N of SH 80 · Structure no. 161290036606029
- Built
- 1939
- 86 years old, rebuilt 1985
- Condition
- Good
- inspected May 2024
- Type
- Culvert
- Concrete
- Length
- 45 ft
- 4 main spans
- Daily traffic
- 3,174
- 2020 count
- Owner
- State
- State Highway Agency
About this bridge
SH 123 over Manka Lake Slough is a concrete culvert carrying SH 123 over Manka Lake Slough in Karnes County, Texas. It was built in 1939 and reconstructed in 1985, so it is 86 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 3,174 vehicles a day, roughly 17% of them trucks, projected to reach 6,730 by 2033. The structure is 45 ft (13.7 m) long and 68 ft wide. If it were closed, the detour would be 8.1 mi (13 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 123 over Manka Lake Slough built?
It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1985.
What condition is SH 123 over Manka Lake Slough 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 May 2024.
How much traffic does SH 123 over Manka Lake Slough carry?
About 3,174 vehicles per day (2020 count), of which roughly 17% are trucks.
How long is SH 123 over Manka Lake Slough?
The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3 m) and a deck 68 ft wide.
Who owns SH 123 over Manka Lake Slough?
It is owned by the State Highway Agency.