Welcome to CTRA

home

news

membership

calendar

river facts

links

contact

Thornapple River Water Quality Monitoring by Rusty Trapp - July 2010

History of Cascade Dam

Highlights of Cascade Dam

Fish Survey 2006

Fish Survey 2005

Fish Survey 1993-1994

Water Testing 2007

Soil Testing 2006

Drawdown Schedule Letter 1996

Drawdown Schedule 2003 - 2020 

Large Maps of Thornapple River Aerial AccessKent  Aerial Regis  Pictoral Regis 

Large Map of Thornapple River from Regis (plain) Bitmap file for printing 

Really Very Large Thornapple River Map with Parcel Detail (a PDF that works with iBooks) 

Basic River Maps Dam to 68th (very wide) draft 1.0  Today vs 1983 

Working River Maps Dam to 60th draft 1.2  60th to 68th draft 1.0