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Exploratory drilling for ground water in the Mountain-Iron-Virginia area, St. Louis County, Minnesota

Water Supply Paper 1539-A

Prepared in cooperation with the Minnesota Iron Range Resources and Rehabilitation Commission and with the Division of Waters, Minnesota Department of Conservation
By:
and

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Abstract

The Mountain Iron-Virginia area is a broad, southwest-trending valley in the central part of the Mesabi Range. The valley, which heads in the Laurentian Divide, and covers about 120 square miles, coincides approximately with a bedrock valley filled with as much as 150 feet of glacial deposits.

A complex sequence of glacioaqueous sediments made up of clay, silt, sand, and gravel was delineated from test holes drilled at 238 sites. These sediments range in thickness from 0 to 125 feet and can be considered a hydrologic unit, bounded below by sandy till or bedrock and above by as much as 60 feet of clayey till. The piezometric surface ranges from 0 to about 70 feet below land surface, thus, the glacioaqueous deposits are not everywhere completely saturated. In places, however, the water is under artesian pressure.

Within the Mountain Iron-Virginia area about 50 square miles are underlain by deposits 20 feet or more in thickness of silt, sand, or gravel that constitute an aquifer that is a large potential source for additional water supplies. Except for iron and manganese, which are present in excessive amounts in some wells, the water meets U.S. Public Health Service standards for municipal supplies. Pumping tests of wells in the permeable sand or gravel deposits at five sites indicate that yields of several hundred gallons per minute and possibly as much as 2,000 gpm (gallons per minute) can be expected.

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Exploratory drilling for ground water in the Mountain-Iron-Virginia area, St. Louis County, Minnesota
Series title:
Water Supply Paper
Series number:
1539
Chapter:
A
Year Published:
1961
Language:
English
Publisher:
U.S. Government Printing Office
Publisher location:
Washington, DC
Contributing office(s):
Minnesota Water Science Center
Description:
Document: 19 p.; 2 Plates: 33.00 x 40.48 inches and 39.00 x 22.02 inches
Country:
United States
State:
Minnesota
County:
St. Louis County
Other Geospatial:
Mountain-Iron-Virginia area
Online Only (Y/N):
N
Additional Online Files (Y/N):
N