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).