Risky reservoirs: Montana counties where aging dams pose the greatest threat
- Total high-hazard dams: 5
- Number potentially dangerous: 1 (20.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
- Total high-hazard dams: 4
- Number potentially dangerous: 1 (25.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
- Total high-hazard dams: 8
- Number potentially dangerous: 2 (25.0%)
- Potentially dangerous dams include:
--- 2 in poor condition
- Total high-hazard dams: 7
- Number potentially dangerous: 2 (28.6%)
- Potentially dangerous dams include:
--- 2 condition withheld
- Total high-hazard dams: 3
- Number potentially dangerous: 1 (33.3%)
- Potentially dangerous dams include:
--- 1 in poor condition
- Total high-hazard dams: 9
- Number potentially dangerous: 3 (33.3%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 2 not rated
- Total high-hazard dams: 5
- Number potentially dangerous: 2 (40.0%)
- Potentially dangerous dams include:
--- 2 condition withheld
- Total high-hazard dams: 5
- Number potentially dangerous: 2 (40.0%)
- Potentially dangerous dams include:
--- 2 in poor condition
- Total high-hazard dams: 2
- Number potentially dangerous: 1 (50.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
- Total high-hazard dams: 6
- Number potentially dangerous: 3 (50.0%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 1 condition withheld
- Total high-hazard dams: 8
- Number potentially dangerous: 4 (50.0%)
- Potentially dangerous dams include:
--- 1 not rated
--- 3 condition withheld
- Total high-hazard dams: 11
- Number potentially dangerous: 6 (54.5%)
- Potentially dangerous dams include:
--- 3 in poor condition
--- 1 not rated
--- 2 condition withheld
- Total high-hazard dams: 7
- Number potentially dangerous: 4 (57.1%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 3 not rated
- Total high-hazard dams: 5
- Number potentially dangerous: 3 (60.0%)
- Potentially dangerous dams include:
--- 3 condition withheld
- Total high-hazard dams: 16
- Number potentially dangerous: 10 (62.5%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 1 not rated
--- 8 condition withheld
- Total high-hazard dams: 3
- Number potentially dangerous: 2 (66.7%)
- Potentially dangerous dams include:
--- 2 in poor condition
- Total high-hazard dams: 3
- Number potentially dangerous: 2 (66.7%)
- Potentially dangerous dams include:
--- 2 condition withheld
- Total high-hazard dams: 4
- Number potentially dangerous: 3 (75.0%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 2 not rated
- Total high-hazard dams: 4
- Number potentially dangerous: 3 (75.0%)
- Potentially dangerous dams include:
--- 3 in poor condition
- Total high-hazard dams: 9
- Number potentially dangerous: 7 (77.8%)
- Potentially dangerous dams include:
--- 2 in poor condition
--- 4 not rated
--- 1 condition withheld
- Total high-hazard dams: 6
- Number potentially dangerous: 5 (83.3%)
- Potentially dangerous dams include:
--- 5 condition withheld
- Total high-hazard dams: 12
- Number potentially dangerous: 10 (83.3%)
- Potentially dangerous dams include:
--- 1 in poor condition
--- 9 condition withheld
- Total high-hazard dams: 7
- Number potentially dangerous: 6 (85.7%)
- Potentially dangerous dams include:
--- 5 not rated
--- 1 condition withheld
- Total high-hazard dams: 9
- Number potentially dangerous: 8 (88.9%)
- Potentially dangerous dams include:
--- 8 condition withheld
- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 condition withheld
- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 posing immediate threat
- Total high-hazard dams: 1
- Number potentially dangerous: 1 (100.0%)
- Potentially dangerous dams include:
--- 1 condition withheld
- Total high-hazard dams: 2
- Number potentially dangerous: 2 (100.0%)
- Potentially dangerous dams include:
--- 2 condition withheld
- Total high-hazard dams: 3
- Number potentially dangerous: 3 (100.0%)
- Potentially dangerous dams include:
--- 3 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.