Minnesota Groundwater Tracing Database

The Minnesota Groundwater Tracing Database (MGTD) contains information from nearly 400 groundwater traces in Minnesota. The groundwater traces were primarily conducted using fluorescent dyes. This information includes tracer input locations, inferred groundwater flow vectors, surface and subsurface springshed delineations, a comprehensive list of sampling locations that indicates whether or not the tracer was detected, and links to reports and associated documentation.

Minnesota Groundwater Tracing Database

The web map includes links to the Minnesota Spring Inventory, the Karst Feature Inventory, and the County Well Index. View inferred groundwater flow direction, springsheds, and dye input locations with the following link.

Groundwater Trace Reports

Trace reports, where available, can be opened by clicking the dye input points in the Minnesota Groundwater Tracing Database web map or the links in the table below.

Reports were developed in a collaborative effort with the DNR and the University of Minnesota, with support from soil and water conservation districts, Minnesota Department of Health, Minnesota Department of Agriculture, and the local caving community. Groundwater tracing investigations may cross county boundaries. Reports are organized by county according to the tracer input point.



Dakota County

Trout Brook2011, 2012a | 2011, 2012b

Dodge County

Salem Creek2004

Fillmore County

Bat River Cave2008
Canfield Creek2009 
Canton-Frego1941 Ideal Creamery  | 1993 | 2008 | 20092009, 2010, 2011 | 1943 AWWA
Crystal Creek20102010, 2011, 2013, 2016 a2010, 2011, 2013, 2016 b | 2018

Duschee Creek
Lanesboro State Fish Hatchery

1986, 1987, 1988, 1989, 1991, 1992 | 1994
Forestville North2008 
Forestville State Park2013a2013b
Fountain1984 | 2012 | 2016
Freiheit Spring2009a2009b | 2010a | 2010b
Jeff Green 24K USGS Quadrangles

Cherry Grove
Fountain a | Fountain b
Greenleafton a | Greenleafton b
Harmony a | Harmony b
Ostrander a | Ostrander b

Goliath's Cave2007
Harmony2007, 2009, 2010Spring 2008 | Fall 2008 | 1943 AWWA | 2018
Holy Grail Cave2015 [cave map]
Ironwood Landfill, South Branch Root River Traces1981 | 1982
Meyer’s Basin & Forlorn River1996-1999
Mystery Cave1996 [cave map]
Odessa Spring1997
Ron Spong 24K USGS Quadrangles


Chatfield a | Chatfield b [redacted]
Cherry Grove
Fountain a | Fountain b
Greenleafton a | Greenleafton b
Harmony a | Harmony b
Spring Valley
Stewartville a | Stewartville b
Washington a | Washington b
Wykoff a | Wykoff b

Shady Creek2012
South Branch Root River1983 | 2006, 2007, 2008 | 2009 | 2009 GSA
South Fork Root River2007
Spring Valley Caverns2003 | 2006a | 2006b
Stone Barn2004
Tyson Spring2009
York Blind Valley2017

Hennepin County

Camp Coldwater (Ft. Snelling)2001 (p. 4–6) | 2001, 2015

Houston County

Bridge Creek2012, 2013 
Daley Creek2009 
Girl Scout Camp Creek2013 
Indian Springs Creek2010
Sullivan Creek2009 
Winnebago Creek2008

Hubbard County

Deep Portage1997

Mower County

Grand Meadow1998
Jeff Green 24K USGS Quadrangles

Ostrander a | Ostrander b

Olmsted County

Bear Spring2018
Devil's Den2018
Morehart Farm2007 
Orion, Marion, Eyota2014, 2015, 2016 | 2015
Oronoco Landfill1989, 1990 (p. 417 - 429) | 1989, 1990
Rochester1942 | 1943 AWWA
Salem Creek2004
South Orion2021
Springdale2016 | 2017

Pine County

Askov2005a | 2005b

Wabasha County

Gilbert Creek2012
Gorman Creek2011 

Winona County

Ahrensfeld Borson NE2007 | 2007, 2008, 2010
Cambell Valley Creek2012, 2013 
Lewiston Interchange2008
Murphy (Winona County) Landfill1982a | 1982b
Stockton2014 | 2016
Whitewater River Valley1980a | 1980b | 1980, 2008, 2010, 2011, 2012 | 2010

Yellow Medicine County

Sioux Nation1994


Related Information

Journal Publications

Conference Proceedings



  • John Barry, Department of Natural Resources, 651-259-5660