There are several dams in Prince William County that are subject to the Virginia Dam Safety regulations. The Virginia Dam Safety Regulations are found here: http://www.dcr.virginia.gov/dam_safety_and_floodplains/index.shtml
Any proposed development that will occur within mapped dam break inundation zones of state regulated dams must be identified on all Preliminary Plats, Subdivision Plan, Site Plan and Minor Site Plan submissions. A dam break inundation zone refers to the area downstream of a dam that would be inundated by the failure of the dam. Learn more about development in dam break inundation zones.
Prince William County Department of Public Works is responsible for the operation and maintenance of the following state-regulated dams. We have also designated the hazard level for each dam as high, significant or low. The dam breach inundation zones have been mapped for these dams:
There are other dams located in Prince William County which are owned, operated and maintained by private entities. Dam breach inundation zones have also been mapped for these dams:
All dams, including private dams, in Virginia are subject to the Dam Safety Act and Dam Safety Regulations unless specifically excluded. A dam is excluded if it:
Please note: the height of a dam is defined as the vertical distance from the streambed at the downstream toe to the top of the dam. The maximum capacity of a dam is defined as the maximum volume capable of being impounded at the top of the dam.
For more information about dam safety or development in dam break inundation zones, please contact our office at 703-792-7070 (TTY: 711).