CHATFIELD, MN -- At 7:30 a.m. Tuesday, rain began to fall in Chatfield, and Tim Brogan began to worry.

Will the rain be heavy? Will it continue through the week? Will City Park become a mud hole?

Brogan is the local construction manager for the construction of a large new playground in the park, with work beginning Wednesday and the playground dedication set for late Sunday afternoon. Experts from Leathers & Associates, which designed the park, will be the overall bosses, but Brogan is the local man who coordinated delivery of materials and other matters Tuesday.

About 400 volunteers are expected to help, sometimes going in three shifts per day. Others will help feed them. Volunteers are mostly from the area, but also include the Rochester Community and Technical College football team; the RCTC volleyball team; the Minnesota Vixen, which is a Minneapolis-based women's pro football team; and the Rochester Ice Hawks hockey team.