Alluvium and Glacial Outwash Sediments (Qa)
These sediments form terraces and floodplains along the Ohio River and
tributaries. Valley-train deposits in terraces occur along the Ohio
These sediments may yield several hundred gallons per minute to drilled
wells in alluvium in the Ohio River Valley, with as much as 5,000 gallons
per minute to compound horizontal wells. Nearly all wells furnish more
than 500 gallons per day. Alluvium in stream valleys tributary to the
Ohio River is fine grained and thin; most wells do not yield enough
for domestic use. Water is hard to very hard and may contain objectionable
amounts of iron.
The loess forms a thin mantle over alluvial deposits and bedrock over
much of the area near the Ohio River.
The loess yields practically no water to wells.
McLeansboro Group (Mattoon, Bond, Patoka, and Shelburn Formations),
formerly the Sturgis Formation (Ps)
This group forms dissected uplands and ridgetops.
This group yields practically no water except to wells penetrating sandstone.
Water near the outcrop area is hard but is increasingly soft downdip.
Sodium bicarbonate content increases downdip. Iron may be present in
Carbondale Formation (Pc)
The Carbondale forms dissected uplands and ridgetops. Resistant sandstone
beds form cliffs.
The Carbondale yields enough water for a modern domestic supply to wells
penetrating sandstone, but practically no water to wells penetrating
shale. Water is hard or very hard in outcrop area and is increasingly
Tradewater Formation (Pt)
The Tradewater underlies dissected uplands and ridgetops. Resistant
sandstone beds form cliffs.
The Tradewater generally yields only small quantities of water to wells.
It may yield enough water for a modern domestic supply to wells penetrating
a sufficient thickness of sandstone, but it yields practically no water
from limestone and shale. Water is hard to very hard and low in dissolved
solids near outcrop area and becomes increasingly mineralized but softer
downdip to the west. Water from the lower part of the formation generally
contains objectionable amounts of iron.
Generalized areas of underground mining have been compiled for several
important coal beds as part of the U.S. Geological Survey's National
Coal Assessment Program. Using these data, a map was created showing
areas of selected seams in the county.
The U.S. Geological Survey's Hydrologic Atlas Series, published cooperatively
with the Kentucky Geological Survey, provides hydrologic information
for the entire state. Atlases for Daviess County are HA-27,
to "Groundwater Resources in Kentucky"