The Department is concerned with the protection of the health, safety and welfare of the people of the State of New York and the conservation and protection of its natural resources. Water stored behind a dam represents potential energy which can create a hazard to life and property located downstream of a dam. In order for a dam to safely fulfill its intended function, it must be constructed, operated and maintained properly.
The risks associated with the storage of water must be minimized at all times. The height of a dam, its maximum impoundment capacity, the physical characteristics of the dam site and the location of downstream facilities should be assessed to determine the appropriate hazard classification.
The functions of the Department's Dam Safety Section include: safety inspection of dams; technical review of proposed dam construction or modification; monitoring of remedial work for compliance with dam safety criteria; and emergency preparedness.
If you are considering the construction, modification, or repair of a dam, please contact the Department's Dam Safety Section.
DRAFT TOGS 3.1.5 - Guidance for Dam Hazard Classification
Program Policy DOW 3.1.5 - Draft Guidance for Dam Hazard Classification (PDF, 75 KB) is now available for download.
Owners Guidance Manual for the Inspection and Maintenance of Dams in NYS
The Owners Guidance Manual for the Inspection and Maintenance of Dams in New York State is available for download below or in the important links column on the right.
- Download the entire file: Chapters 1-10 & App. A-E (PDF, 8.6 MB)
- Chapters 1-5 (PDF, 1.7 MB)
- Chapters 6-8 (PDF, 4.3 MB)
- Chapter 9-10 & App. A-E (PDF, 2.78 MB)
The Guidelines for the Design of Dams is also available for download in the important links column on the right.
New York State Dams Inventory
The DEC has a Virtual Globe dataset that depicts the location of dams in the New York State Inventory of Dams. While the DEC tries to maintain an accurate inventory, this data should not be relied upon for emergency response decision-making. DEC recommends that critical data, including dam location and hazard classification, be verified in the field. The presence or absence of a dam in this inventory does not indicate its regulatory status. Any corrections to the inventory should be submitted to the Department's Dam Safety Section with supporting information.
More about Dam Safety:
- Dam Safety Forms - These forms are intended to assist dam owners in compliance with several components of the newly adopted (August 19, 2009) Part 673 Dam Safety Regulations.
- December 2009 Letter to Class C and Class B Dam Owners - Notification letter to Class C and Class B dam owners regarding time deadlines for compliance to NYS Revised Dam Safety Regulations.
- Information for Dam Owners - Six guidance documents for dam owners
- Croghan Island Dam Enforcement Action - DEC reduces water behind the Croghan Island Dam to protect the public.