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GEOLOGIC ATLAS OF RENVILLE COUNTY, MINNESOTA

Hydrogeologic Cross Sections By Randy J. Bradt

2017

COUNTY ATLAS SERIESRENVILLE COUNTYAtlas C-28, Plate 8 of 8

Hydrogeologic Cross SectionsE–E’ through I–I’

To accompany these atlas componentsReport, Map Figures 1–27, Plates 6–7

STATE OF MINNESOTA DEPARTMENT OF NATURAL RESOURCES

500 Lafayette Road St. Paul, MN 55155-4025 888-646-6367 or 651-296-6157 mndnr.gov

This information is available in alternative format on request.

The Minnesota DNR prohibits discrimination in its programs and services based on race, color, creed, religion, national origin, sex, public assistance status, age, sexual orientation, or disability. Persons with disabilities may request reasonable modifications to access or participate in DNR programs and services by contacting the DNR ADA Title II Coordinator at [email protected] or 651-259-5488. Discrimination inquiries should be sent to Minnesota DNR, 500 Lafayette Road, St. Paul, MN 55155-4049; or Office of Civil Rights, U.S. Department of the Interior, 1849 C Street NW, Washington, DC 20240.

© 2017, State of Minnesota, Department of Natural Resources and the Regents of the University of Minnesota

Funding for this project was provided by the following:

The Minnesota Environment and Natural Resources Trust Fund as recommended by the Legislative Citizen Commission on Minnesota Resources (LCCMR).

The Clean Water Fund, which receives 33 percent of the sales tax revenue from the Clean Water, Land and Legacy Amendment, approved by voters in November 2008.

This map was compiled and generated in a geographic information system. Digital data products are available from the DNR County Geologic Atlas Program at mndnr.gov/groundwatermapping.

This map was prepared from publicly available information. Every reasonable effort has been made to ensure the accuracy of the factual data on which this map interpretation is based. However, the DNR does not warrant the accuracy, completeness, or any implied uses of these data. Users may wish to verify critical information; sources include both the references in the report and information on file in the offices of the Minnesota Geological Survey and the DNR. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. This map should not be used to establish legal title, boundaries, or locations of improvements.

Base modified from Minnesota Geological Survey, Renville County Geologic Atlas, Part A, 2013.

Universal Transverse Mercator projection, zone 15N, North American Datum of 1983. North American Vertical Datum of 1988.

GIS and cartography by Randy J. Bradt and Holly Johnson. Edited by Ruth MacDonald.

Prepared and Published with the Support of the MINNESOTA ENVIRONMENT AND NATURAL RESOURCES TRUST FUND and the CLEAN WATER, LAND AND LEGACY AMENDMENT

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I’I

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44° 45'

94° 45' 94° 30'

44° 30'

95° 00'95° 15'

)4

19

71

212

212

71

BuffaloLake

Hector

Bird IslandOlivia

DanubeRenvilleSacred Heart

FairfaxFranklin

Morton

B’

A A’

B

CD D’

C’

G’

F’

E’

I’

H’

E

F

G

HI

A

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C

D

E

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B’

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F’

Symbols

Part B line of cross section not shown on this plate

Well used to generate cross sectionA A’

Part B line of cross section shown on this plate

F F’

Part A line of cross sectionA A’

1 0 1 2 3 4

SCALE 1:400 000

1 0 1 2 4 5 6 7 KILOMETERS3

5 MILES

N

ss

Aquifers and aquitards grouped by stratigraphy

Quaternary unconsolidated sediment

Quaternary aquitardsGrouped by texture ranging from highest to lowest sand content indicating relative hydraulic conductivity.

Surficial sand and gravel

Buried aquifers and aquitards

Geologic unit code Percent sand

Bedrock

bdrk

tt

ti, tm

th, g1, g2, g3, g4, te

hl, l

>50% and ≤60%

>40% and ≤50%

>30% and ≤40%

≤30%

Groundwater conditions

Symbols and labels

Land or bedrock surface

General groundwater flow direction

Geologic contact

Approximate equipotential contour; contour interval 25 feet

1050

Water table

Tritium ageDarker color in small vertical rectangle (well screen symbol) indicates tritium age of water sampled in well. Lighter color indicates interpreted age of water in aquifer.

Mixed: water is a mixture of recent and vintage waters (greater than 1 TU to less than 8 TU).

Well not sampled for tritium.

Pumping well

Vintage: water entered the ground before 1953 (less than or equal to 1 TU).

Recent: water entered the ground since about 1953 (8 to 15 tritium units [TU]).

CROSS SECTION EXPLANATION

Interpreted tritium age is indicated by background color

Interpreted tritium age is indicated by pattern color

See Report Figure 1 for geologic unit correlation.

Chloride concentration. If shown, chloride concentration equals or exceeds 5 parts per million and bromide concentration equals or exceeds 0.07 part per million.(* indicates naturally elevated values)

17.2*

If shown, nitrate concentration equals or exceeds 1 part per million.

1.98

If shown, arsenic concentration equals or exceeds 5 parts per billion.

8.1

If shown, manganese concentration equals or exceeds 100 parts per billion.

If shown, groundwater residence time in years as estimated by carbon-14 (14C) isotope analysis.

8000

110

Groundwater flowpath is unknown (deep groundwater, recent or mixed tritium age).

1 0 1 2 3 4 5 MILES

1 0 1 2 4 5 6 7 83 9 KILOMETERS

SCALE 1:100 000VERTICAL EXAGGERATION X 50

hl*l*th*siti*smtm*sttt*g1*s2g2*s3g3*s4g4*te*suUndifferentiated sediment (u)szUnknown (UNKN)

Groundwater discharges to a surface-water body.

*aquitard

LOCATION DIAGRAM