Reports from various agencies and groups concerning the Helena area.

Channel Migration Zone Mapping  PPC/TMC - Final Report 2011

Emerald Ridge Area Ground Water Resource Assessment - March 2014

Emerald Ridge Poster - 2014

Helena Valley Non-point Source Assessment- August, 2015 

Helena Valley Groundwater Monitoring for Pesticides & Nitrates.  Department of Agriculture, 2006 

Helena Valley Pharmaceutical  Study - DEQ, 2005

Hydrogeology of the Helena Valley- Fill Aquifer System - Briar, Madison USGS 1992

Lake Helena TMDL - Upper Missouri 

Lewis & Clark County Helena Valley Ground Water Vulnerability Project -Trihydro 2008

Montana Channel Migration Zone (CMZ)Mapping resources are now available on line. An interactive statewide map shows where CMZ studies have been completed.   

Prickly Pear Creek 2019 Re-watering Project - Final Report 

Raven Road Report- March 2016