About DamIndex
Ben Williams, Founder
Ben Williams created DamIndex to make large-scale infrastructure data more understandable for the public. He is especially interested in how water systems, public works, and safety records can be turned into useful educational resources for communities and researchers.
Our Mission
DamIndex exists to make U.S. dam infrastructure data accessible and understandable. We take the raw data from the National Inventory of Dams (NID) — maintained by the U.S. Army Corps of Engineers — and present it in a way that anyone can explore, compare, and learn from.
There are more than 92,000 dams across the United States. Many communities live downstream of these structures without easy access to basic information about their age, condition, or hazard classification. DamIndex bridges that gap by providing a free, searchable interface for the public record.
What DamIndex Offers
- • Searchable records for 92,000+ U.S. dams with hazard ratings and safety data
- • Filtering by state, county, hazard level, dam type, purpose, and more
- • Maps showing dam locations with nearby structures
- • Educational guides about dam safety, classification, and infrastructure
- • Statistics and analysis tools for researchers and journalists
Who Is This For?
DamIndex serves researchers studying infrastructure policy, journalists reporting on dam safety, students learning about civil engineering, community members curious about dams in their area, and anyone interested in how the nation's water infrastructure works.
Disclaimer
DamIndex is an independent project and is not affiliated with, endorsed by, or connected to the U.S. Army Corps of Engineers, FEMA, or any state dam safety program. Data is sourced from the National Inventory of Dams and may not reflect current conditions. Do not use this site for emergency planning.
Get in Touch
Have questions, suggestions, or feedback? We would love to hear from you.