A complete County Geologic Atlas (CGA) provides information about the geology and groundwater resources of a county, including the groundwater quality, quantity, and sensitivity to pollution. Most atlases are produced in two parts.
Part A - Geologic Atlas
The Minnesota Geological Survey produces the Part A atlas, which includes the geology, geologic layering, sand distribution, bedrock surface, and depth to bedrock for a specific county.
Part B - Groundwater Atlas
After Part A is completed, the DNR produces the Part B atlas, which includes maps and reports identifying the direction of groundwater flow, aquifer properties, groundwater chemistry, and pollution sensitivity of aquifers. Older atlases include the groundwater information in Part A.
County, Series # | Part A (MGS) Geology | Part B (DNR) Groundwater | Other |
Aitkin | in progress | future start | |
Anoka, C-27 | 2013 | 2016 | |
Becker, C-42 | 2016 | in progress | |
Benton, C-23 | 2010 | 2012 | |
Blue Earth, C-26 | 2011 | 2016 | |
Brown, C-37 | 2016 | 2020 | |
Carlton, C-19 | 2009 | 2011 | |
Carver, C-21 | 2009 | 2014 | |
Cass, C-43 | 2018 | in progress | |
Chisago, C-22 | 2010 | 2014 | |
Clay, C-29 | 2014 | 2018 | |
Crow Wing, C-16 | 2004 | 2007 | |
Dodge, C-50 | 2019 | in progress | |
Dakota, C-06 | 1990 | included in Part A | |
Dakota update | in progress | in progress | |
Fillmore, C-08 | 1995 | 1996 | Part C: 1995 |
Goodhue, C-12 | 1998 | 2003 | |
Hennepin, C-04 | 1989 | included in Part A | |
Hennepin, C-45 update | 2018 | in progress | |
Houston, C-33 | 2014 | in progress | |
Hubbard, C-41 | 2018 | in progress | |
Isanti, C-44 | 2017 | in progress | |
Kanabec, C-38 | 2016 | 2020 | |
Kandiyohi, C46 | 2019 | future start | |
Lake | in progress, preliminary files available | to be determined | |
McLeod, C-20 | 2009 | 2013 | |
Meeker, C-35 | 2015 | 2019 | |
Morrison, C-31 | 2014 | 2019 | |
Mower, C-11 | 1998 | 2002 | RI-50: 2000 |
Nicollet, C-25 | 2011 | 2016 | |
Nobles, C48 | in progress | future start | |
Olmsted, C-03 | 1988 | included in Part A | |
Olmsted update, C-49 | 2020 | in progress | |
Pennington | in progress | future start | |
Pine, C-13 | 2001 | 2004 | RI-60: 2002 |
Pope, C-15 | 2003 | 2006 | |
Ramsey, C-07 | 1992 | included in Part A | |
Redwood, C-36 | 2016 | 2019 | |
Renville, C-28 | 2013 | 2017 | |
Rice, C-09 | 1995 | 1997 | |
Rock, C-47 | in progress | future start | |
St. Louis | in progress, preliminary files available | to be determined | |
Scott, C-17 | 2006 | included in Part A | C-01: 1982 OFR 08-02: 2008 |
Sherburne, C-32 | 2013 | 2017 | |
Sibley, C-24 | 2011 | 2017 | |
Stearns, C-10 | 1995 | 1998 | Part C: 1996 included in Part A link |
Steele, C-53 | in progress | future start | |
Todd, C-18 | 2007 | 2010 | |
Wabasha, C-14 | 2001 | 2005 | RI-59: 2002 |
Wadena, C-40 | 2016 | in progress | |
Washington, C-05 | 1990 | included in Part A | |
Washington update, C-39 | 2016 | 2019 | |
Winona, C-02 | 1984 | included in Part A | |
Winona update, C-34 | 2014 | in progress | |
Wright, C-30 | 2013 | 2018 |