Olympia engineer Ed Wiltsie submitted this letter to the Mayor of Yelm, Yelm City Council, Yelm Planning Commssion, & Yelm Planning officials for the Yelm's Public Hearing of the Comprehensive Plan Update scheduled for October 24th. He granted permission to share his letter about Critical Areas/Shallow Groundwater Expression with the Yelm Community Blog in this exclusive report.
See his letter and supporting diagrams here starting on page 9.