AGGREGATE POTENTIAL
POTENTIAL AGGREGATE RESOURCES:  Those geologic units that are inferred to
contain potentially significant aggregate deposits.

LIMITED POTENTIAL FOR AGGREGATE RESOURCES:  Those geologic units that
generally have little or no potential for aggregate resources.  In places,
includes aggregate deposits either too small or extremely difficult to map.


GRAVEL PITS
Gravel pit/Sand pit - Locations gathered from a variety of sources.  May be
active, inactive, depleted, or reclaimed.  In places, single symbols indicate
multiple gravel pits.

MnDOT-identified aggregate sources - Test hole logs, sieve and quality test
data available.  Typically include gravel pits.


