Risky reservoirs: Texas counties where aging dams pose the greatest threat

Canva

- Total high-hazard dams: 7
- Number potentially dangerous: 5 (71.4%)
- Potentially dangerous dams include:
--- 2 posing immediate threat
--- 2 not rated
--- 1 condition withheld

#50. Comanche County
Canva

- Total high-hazard dams: 11
- Number potentially dangerous: 8 (72.7%)
- Potentially dangerous dams include:
--- 8 not rated

#49. Lampasas County
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- Total high-hazard dams: 19
- Number potentially dangerous: 14 (73.7%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 11 not rated
--- 2 condition withheld

#48. Comal County
xradiophotog // Shutterstock

- Total high-hazard dams: 4
- Number potentially dangerous: 3 (75.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 2 not rated

#47. Atascosa County
Canva

- Total high-hazard dams: 4
- Number potentially dangerous: 3 (75.0%)
- Potentially dangerous dams include:
--- 3 not rated

#46. San Saba County
xradiophotog // Shutterstock

- Total high-hazard dams: 9
- Number potentially dangerous: 7 (77.8%)
- Potentially dangerous dams include:
--- 2 posing immediate threat
--- 5 not rated

#45. Hood County
Roberto Galan // Shutterstock

- Total high-hazard dams: 5
- Number potentially dangerous: 4 (80.0%)
- Potentially dangerous dams include:
--- 3 in poor condition
--- 1 condition withheld

#44. Bowie County
Canva

- Total high-hazard dams: 6
- Number potentially dangerous: 5 (83.3%)
- Potentially dangerous dams include:
--- 3 not rated
--- 2 condition withheld

#43. Harris County
Canva

- Total high-hazard dams: 16
- Number potentially dangerous: 14 (87.5%)
- Potentially dangerous dams include:
--- 13 not rated
--- 1 condition withheld

#42. Coleman County
Canva

- Total high-hazard dams: 9
- Number potentially dangerous: 8 (88.9%)
- Potentially dangerous dams include:
--- 8 not rated

#41. Cooke County
Canva

- Total high-hazard dams: 9
- Number potentially dangerous: 8 (88.9%)
- Potentially dangerous dams include:
--- 1 posing immediate threat
--- 7 not rated

#40. McCulloch County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#39. Liberty County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 posing immediate threat

#38. Waller County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition

#37. Val Verde County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 posing immediate threat

#36. Hale County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#35. Milam County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#34. Gray County
Roberto Galan // Shutterstock

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#33. Jackson County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 condition withheld

#32. Live Oak County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#31. Ochiltree County
Edward H. Campbell // Shutterstock

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#30. Dimmit County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#29. Presidio County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#28. Garza County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#27. Crosby County
xradiophotog // Shutterstock

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 condition withheld

#26. Knox County
Canva

- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated

#25. Donley County
Canva

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#24. San Patricio County
Canva

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#23. Matagorda County
Roberto Galan // Shutterstock

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 condition withheld

#22. Jasper County
Canva

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#21. Kleberg County
Roberto Galan // Shutterstock

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 1 not rated

#20. San Jacinto County
Sabrina Janelle Gordon // Shutterstock

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#19. Houston County
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- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#18. Llano County
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- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#17. Reeves County
Roberto Galan // Shutterstock

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 1 not rated

#16. Trinity County
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- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 1 not rated

#15. Wilbarger County
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- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#14. Sabine County
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- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#13. Stephens County
underworld // Shutterstock

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 1 not rated
--- 1 condition withheld

#12. Delta County
Canva

- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated

#11. Kinney County
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- Total high-hazard dams: 3
- Number potentially dangerous: 3 (100.0%)
- Potentially dangerous dams include:
--- 3 not rated

#10. Cameron County
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- Total high-hazard dams: 3
- Number potentially dangerous: 3 (100.0%)
- Potentially dangerous dams include:
--- 3 not rated

#9. Uvalde County
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- Total high-hazard dams: 3
- Number potentially dangerous: 3 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 2 not rated

#8. Young County
Canva

- Total high-hazard dams: 3
- Number potentially dangerous: 3 (100.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 2 not rated

#7. Madison County
Canva

- Total high-hazard dams: 4
- Number potentially dangerous: 4 (100.0%)
- Potentially dangerous dams include:
--- 2 not rated
--- 2 condition withheld

#6. Tom Green County
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- Total high-hazard dams: 4
- Number potentially dangerous: 4 (100.0%)
- Potentially dangerous dams include:
--- 4 not rated

#5. Maverick County
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- Total high-hazard dams: 4
- Number potentially dangerous: 4 (100.0%)
- Potentially dangerous dams include:
--- 4 not rated

#4. Kendall County
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- Total high-hazard dams: 4
- Number potentially dangerous: 4 (100.0%)
- Potentially dangerous dams include:
--- 4 not rated

#3. Tyler County
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- Total high-hazard dams: 6
- Number potentially dangerous: 6 (100.0%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 4 not rated

#2. Medina County
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- Total high-hazard dams: 11
- Number potentially dangerous: 11 (100.0%)
- Potentially dangerous dams include:
--- 11 not rated

This story features data reporting by Paxtyn Merten, writing by Dom DiFurio, and is part of a series utilizing data automation across 50 states.

#1. Webb County
Ric Schafer // Shutterstock