History Mystery

Well-dressed treasure hunt, or civic groundbreaking? Who are these people lined up with shovels, and what where they digging for?
If you recognize anyone in this picture, or know what event they assembled for, tell us at editor@starkvilledailynews.com and we'll put your answer in next week's edition.
Not a single reader took a guess at last week's picture, which featured a woman lecturing to an apparently skeptical crowd on some hot issue of the day. Perhaps we'll unearth some answers on this week's photo.