A grid is displayed on a display device to provide a reference for a geographic area including an excavation site. User input is acquired that relates to a geographic location of at least one physical locate mark applied by a technician to a ground surface at the excavation site to indicate a presence or an absence of at least one underground facility at the excavation site. Based on the user input, at least one digital representation of the at least one physical locate mark is added to the displayed grid so as to generate a marked-up image. Information relating to the marked-up image is electronically stored and/or electronically transmitted so as to generate an electronic manifest.