Residents are being reminded to “know what’s below” before taking on digging projects this spring. April is National Safe Digging month and homeowners are urged to take advantage of the free service to have utility lines on their property marked to avoid the potential injury and costly repairs that come with accidentally striking one of these lines. Residents should call 811 to reach the Diggers Hotline in Wisconsin or MISS DIG in Michigan at least three working days before they intend to begin their digging project.