Risky reservoirs: New York counties where aging dams pose the greatest threat

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- Total high-hazard dams: 29
- Number potentially dangerous: 2 (6.9%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 1 not rated

#43. St. Lawrence County
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- Total high-hazard dams: 8
- Number potentially dangerous: 1 (12.5%)
- Potentially dangerous dams include:
--- 1 in poor condition

#42. Warren County
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- Total high-hazard dams: 7
- Number potentially dangerous: 1 (14.3%)
- Potentially dangerous dams include:
--- 1 in poor condition

#41. Schoharie County
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- Total high-hazard dams: 14
- Number potentially dangerous: 2 (14.3%)
- Potentially dangerous dams include:
--- 2 posing immediate threat

#40. Sullivan County
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- Total high-hazard dams: 13
- Number potentially dangerous: 2 (15.4%)
- Potentially dangerous dams include:
--- 2 in poor condition

#39. Saratoga County
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- Total high-hazard dams: 6
- Number potentially dangerous: 1 (16.7%)
- Potentially dangerous dams include:
--- 1 in poor condition

#38. Madison County
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- Total high-hazard dams: 14
- Number potentially dangerous: 3 (21.4%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 1 condition withheld

#37. Dutchess County
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- Total high-hazard dams: 12
- Number potentially dangerous: 3 (25.0%)
- Potentially dangerous dams include:
--- 3 not rated

#36. Cattaraugus County
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- Total high-hazard dams: 10
- Number potentially dangerous: 3 (30.0%)
- Potentially dangerous dams include:
--- 3 in poor condition

#35. Rensselaer County
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- Total high-hazard dams: 10
- Number potentially dangerous: 3 (30.0%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 1 not rated

#34. Clinton County
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- Total high-hazard dams: 3
- Number potentially dangerous: 1 (33.3%)
- Potentially dangerous dams include:
--- 1 in poor condition

#33. Erie County
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- Total high-hazard dams: 15
- Number potentially dangerous: 5 (33.3%)
- Potentially dangerous dams include:
--- 3 in poor condition
--- 2 condition withheld

#32. Albany County
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- Total high-hazard dams: 33
- Number potentially dangerous: 11 (33.3%)
- Potentially dangerous dams include:
--- 3 posing immediate threat
--- 7 in poor condition
--- 1 not rated

#31. Orange County
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- Total high-hazard dams: 8
- Number potentially dangerous: 3 (37.5%)
- Potentially dangerous dams include:
--- 3 in poor condition

#30. Chemung County
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- Total high-hazard dams: 10
- Number potentially dangerous: 4 (40.0%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 2 not rated

#29. Herkimer County
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- Total high-hazard dams: 22
- Number potentially dangerous: 9 (40.9%)
- Potentially dangerous dams include:
--- 4 in poor condition
--- 5 not rated

#28. Putnam County
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- Total high-hazard dams: 7
- Number potentially dangerous: 3 (42.9%)
- Potentially dangerous dams include:
--- 3 in poor condition

#27. Ulster County
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- Total high-hazard dams: 9
- Number potentially dangerous: 4 (44.4%)
- Potentially dangerous dams include:
--- 4 in poor condition

#26. Onondaga County
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- Total high-hazard dams: 36
- Number potentially dangerous: 16 (44.4%)
- Potentially dangerous dams include:
--- 12 in poor condition
--- 4 not rated

#25. Westchester County
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- Total high-hazard dams: 2
- Number potentially dangerous: 1 (50.0%)
- Potentially dangerous dams include:
--- 1 not rated

#24. Ontario County
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- Total high-hazard dams: 2
- Number potentially dangerous: 1 (50.0%)
- Potentially dangerous dams include:
--- 1 in poor condition

#23. Cayuga County
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- Total high-hazard dams: 2
- Number potentially dangerous: 1 (50.0%)
- Potentially dangerous dams include:
--- 1 condition withheld

#22. Livingston County
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- Total high-hazard dams: 2
- Number potentially dangerous: 1 (50.0%)
- Potentially dangerous dams include:
--- 1 in poor condition

#21. Montgomery County
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- Total high-hazard dams: 2
- Number potentially dangerous: 1 (50.0%)
- Potentially dangerous dams include:
--- 1 posing immediate threat

#20. Seneca County
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- Total high-hazard dams: 4
- Number potentially dangerous: 2 (50.0%)
- Potentially dangerous dams include:
--- 2 in poor condition

#19. Tompkins County
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- Total high-hazard dams: 10
- Number potentially dangerous: 5 (50.0%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 3 not rated

#18. Oneida County
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- Total high-hazard dams: 14
- Number potentially dangerous: 8 (57.1%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 6 not rated

#17. Monroe County
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- Total high-hazard dams: 5
- Number potentially dangerous: 3 (60.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 2 not rated

#16. Chautauqua County
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- Total high-hazard dams: 10
- Number potentially dangerous: 6 (60.0%)
- Potentially dangerous dams include:
--- 6 in poor condition

#15. Chenango County
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- Total high-hazard dams: 3
- Number potentially dangerous: 2 (66.7%)
- Potentially dangerous dams include:
--- 2 in poor condition

#14. Cortland County
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- Total high-hazard dams: 7
- Number potentially dangerous: 5 (71.4%)
- Potentially dangerous dams include:
--- 5 in poor condition

#13. Fulton County
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- Total high-hazard dams: 7
- Number potentially dangerous: 5 (71.4%)
- Potentially dangerous dams include:
--- 3 in poor condition
--- 1 not rated
--- 1 condition withheld

#12. Delaware County
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- Total high-hazard dams: 23
- Number potentially dangerous: 17 (73.9%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 15 not rated
--- 1 condition withheld

#11. Broome County
Joe Trentacosti // Shutterstock

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

#10. Steuben County
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- Total high-hazard dams: 4
- Number potentially dangerous: 3 (75.0%)
- Potentially dangerous dams include:
--- 3 in poor condition

#9. Hamilton County
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- Total high-hazard dams: 5
- Number potentially dangerous: 4 (80.0%)
- Potentially dangerous dams include:
--- 4 in poor condition

#8. Tioga County
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- Total high-hazard dams: 13
- Number potentially dangerous: 11 (84.6%)
- Potentially dangerous dams include:
--- 6 in poor condition
--- 5 not rated

#7. Rockland County
littlenySTOCK // Shutterstock

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

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

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

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

#3. Yates 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

#2. Wayne 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

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. Schuyler County
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