Maryland Dam Inventory

​There are over 600 dams in Maryland, ranging in height from six to 296 feet. The Dam Safety Program maintains the Maryland Dam Inventory database, and has developed a webmap​ with information from the database for use by the public.​

While the Dam Safety Program makes every effort to maintain an accurate database, this data should not be solely relied upon for emergency decision-making or engineering design purposes. All data, including the dam location and hazard classification must be field verified by the user.  The presence or absence of a dam in this inventory does not indicate its regulatory status. All corrections to the inventory should be submitted to the Department's Dam Safety Program with supporting information as soon as changes are known. The data was last updated on August 31, 2021.

In addition, there are many thousands of small dams that do not meet the criteria for inclusion in the Maryland Dam Inventory. There are no natural lakes or ponds in the State of Maryland, so all bodies of water exist due to a dam constructed by man or nature (beavers, coastal deposition).

Contact Information

For more information, you may call us at (410) 537-3552 or reach us at our mailing address:

Dam Safety Program
Water and Science Administration
Maryland Department of the Environment

1800 Washington Boulevard, Ste. 440
Baltimore, Maryland 21230-1708​​

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