Dams are regulated when they are over 6 feet in height and over 5 acres are impounded during the design flood. Permits are required for construction and repair of regulated dams. Staff review and approve plans prepared by licensed professional engineers. Inspection reports are required every three to five years for dams based on hazard potential rating. Staff review all inspection reports, inspect all Department of Natural Resources dams, and inspect municipal dams, if requested.
Staff handle engineering and dam safety aspects.
There are 329 legally established lake levels in the state. All 255 dams under this Part are inspected every three years. Staff review all inspection reports and plans for construction and repair. The Hydrologic Studies Unit collects, evaluates and analyzes basic hydrologic data to provide technical support to Department programs. Soil Erosion and Sedimentation Control Staff oversee the administration of Part 91, which is locally administered.