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

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- Total high-hazard dams: 20
- Number potentially dangerous: 1 (5.0%)
- Potentially dangerous dams include:
--- 1 condition withheld

#30. Pierce County
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- Total high-hazard dams: 15
- Number potentially dangerous: 1 (6.7%)
- Potentially dangerous dams include:
--- 1 not rated

#29. Whatcom County
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- Total high-hazard dams: 58
- Number potentially dangerous: 4 (6.9%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 3 condition withheld

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

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

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

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

#24. Mason County
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- Total high-hazard dams: 6
- Number potentially dangerous: 1 (16.7%)
- Potentially dangerous dams include:
--- 1 posing immediate threat

#23. Thurston County
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- Total high-hazard dams: 11
- Number potentially dangerous: 2 (18.2%)
- Potentially dangerous dams include:
--- 2 in poor condition

#22. Pend Oreille County
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- Total high-hazard dams: 26
- Number potentially dangerous: 5 (19.2%)
- Potentially dangerous dams include:
--- 5 in poor condition

#21. Chelan County
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- Total high-hazard dams: 9
- Number potentially dangerous: 2 (22.2%)
- Potentially dangerous dams include:
--- 2 in poor condition

#20. Skagit County
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- Total high-hazard dams: 30
- Number potentially dangerous: 9 (30.0%)
- Potentially dangerous dams include:
--- 5 in poor condition
--- 4 condition withheld

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

#18. Clark County
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- Total high-hazard dams: 3
- Number potentially dangerous: 1 (33.3%)
- Potentially dangerous dams include:
--- 1 condition withheld

#17. Douglas County
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- Total high-hazard dams: 6
- Number potentially dangerous: 2 (33.3%)
- Potentially dangerous dams include:
--- 2 posing immediate threat

#16. Lewis County
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- Total high-hazard dams: 17
- Number potentially dangerous: 6 (35.3%)
- Potentially dangerous dams include:
--- 4 in poor condition
--- 2 not rated

#15. Snohomish County
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- Total high-hazard dams: 13
- Number potentially dangerous: 5 (38.5%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 4 condition withheld

#14. Okanogan County
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- Total high-hazard dams: 5
- Number potentially dangerous: 2 (40.0%)
- Potentially dangerous dams include:
--- 1 posing immediate threat
--- 1 condition withheld

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

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

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

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

#9. Ferry County
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- Total high-hazard dams: 4
- Number potentially dangerous: 2 (50.0%)
- Potentially dangerous dams include:
--- 2 condition withheld

#8. Walla Walla County
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- Total high-hazard dams: 8
- Number potentially dangerous: 4 (50.0%)
- Potentially dangerous dams include:
--- 4 in poor condition

#7. Grays Harbor County
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- Total high-hazard dams: 7
- Number potentially dangerous: 5 (71.4%)
- Potentially dangerous dams include:
--- 5 condition withheld

#6. Franklin County
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- Total high-hazard dams: 7
- Number potentially dangerous: 5 (71.4%)
- Potentially dangerous dams include:
--- 5 condition withheld

#5. Kittitas County
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- Total high-hazard dams: 6
- Number potentially dangerous: 5 (83.3%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 4 condition withheld

#4. Grant County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 condition withheld

#3. Whitman County
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- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 condition withheld

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

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. Klickitat County
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