We have started preparations for a collaborator workshop at The University of Iowa (UI) in Iowa City, Iowa. About 50 people will represent as many relevant organizations as possible. The list of invitees is currently being assembled for a date tentatively in May 2019. The specific goals of this workshop are to seek input on the UMIS design and functionality, to survey participants regarding water-quality and hydrologic data sources, to solicit commitments from participants to share data, and to open new long-term channels of communication between participants.