DTE Gas Company 2025 Rate Increase Application

Technical support for the City of Ann Arbor in DTE Gas’s rate proceeding.

Groundwork Data supported the City of Ann Arbor in Michigan Public Service Commission Case U-21973, DTE Gas Company’s rate proceeding. Team members Michael J. Walsh and Rick Brown filed separate direct testimony on March 13, 2026.

Walsh examined gas-system strategy, customer costs, emissions, and line extension policies. Brown reviewed specific infrastructure investments and potential alternatives. Each testimony and its supporting exhibits are available as separate downloads below.