Table Name |
Field Name |
Begin Column |
Definition |
Valid Values |
Descriptions |
meekgpits.shp |
Type |
|
Text, 16 |
Gravel Pit |
Gravel Pit |
|
|
|
|
Sand Pit |
Sand Pit |
|
Source |
|
Text, 16 |
Ex: MNDOT ASIS, Air photo, Field Work, Soil
Survey, Topographic Map, etc… |
This is where the
gravel pit location came from or was observed (ex: soil - found on the soil
map). |
|
Pit_q_id |
|
Number, 6,0 |
Ex: 1,2,3,4,5,6,7.... 341, 342, 343, 344 |
Gravel pit unique ID
(1-215). |
|
Asis_numbr |
|
Number, 9,0 |
Ex: 0, 47035, 47036, 47070, etc… |
Aggregate Source
Information System Number (MN/DOT Database).
An empty field means that is does not have an ASIS number. 47xxx
refers to Meeker County (47) and xxx refers to the pit number. Use this field to join with dot_qual.dbf
for the gravel pits that list the Source as
“ASIS”. |
|
Size |
|
Text, 8 |
Small |
Refers to the relative
size of the pit or quarry. Small pits
are generally less than a couple of acres or so. These pits are usually used by private landowners or for small
jobs. |
|
|
|
|
Medium |
Generally less than 10
acres in size. These pits are used by
landowners and for small construction jobs, They are generally used for short
periods of time by contractors. |
|
|
|
|
Large |
These pits are
generally greater than 10 acres and are typically used by commercial
aggregate operators. |
|
Thickmod |
|
Text, 1 |
Ex: ~, >, < |
Modifiers to express
numeric approximations observed for deposit thickness: ~ means approximate,
< means less than, and > means greater than. |
|
Thickval |
|
Number, 4 |
Ex: 5, 10. 15… |
Gives a value for
thickness. |
|
Wattabmod |
|
Text, 1 |
Ex: ~, >, < |
Modifiers to express
numeric approximations for the depth to the water table: ~ means approximate,
< means less than, and > means greater than. |
|
Wattabval |
|
Text, 4 |
Ex: 5, 10. 15… |
Describes the depth to
the water table within a pit or quarry.
If 20 feet of gravel was exposed and there was no water table
encountered, then >20 were used. |
|
Thickness |
|
Text, 15 |
Ex: >10, >20,
>25, 10, 25, <20, etc |
The thickness of the deposit
expressed in combination with a modifier. |
|
Watertable |
|
Text, 15 |
Ex: >10, >20,
>25, 10, 25, <20, etc |
The depth of the water
table expressed in combination with a modifier. |
|
Status_a |
|
Text, 16 |
Active |
Refers to the status of
the gravel pit at the time of mapping.
Active indicates that the pit is either being actively mined or used
for other mining related usage like stockpiling material. |
|
|
|
|
Inactive |
Refers to a pit that does
not appear to have been active for some time. |
|
|
|
|
Reclaimed |
The pit has been
passively or actively reclaimed. Status_b further describes type of
reclamation or what it ha |
|
Dom_litho |
|
Text, 20 |
Des Moines Lobe |
Sand and gravel associated
with a glacier called the Des Moines Lobe.
These sands and gravels contain deleterious rocks (like shale, iron
oxides, and soft limestones) that can degrade the quality of the deposit. |
|
|
|
|
Superior Lobe |
Sand and gravel
associated with a glacier called the Superior Lobe. The quality of these deposits tends to be good to very good due
to the rock types found within the deposits (basalt, granite, gabbro). Also, these deposits have undergone some
degree of mixing with rock types associated the Rainy Lobe (granites). |
|
|
|
|
Undetermined |
The source of the sand
and gravel could not be determined.
This is primarily due to the deposit could not be access and was not observed
and the surrounding geology is too complex to extrapolate the source. |
|
Dom_text |
|
Text, 25 |
Gravel with Sand |
An approximation to
characterized the amount of gravel vs. sand within a deposit. These approximations are based on field observations
and not laboratory tested. Gravel
with sand indicates the deposit contains a very significant portion (by
percent weight) of gravel and the deposit has an overall very coarse texture. |
|
|
|
|
Gravel and Sand |
Indicates the deposit
contains a large amount of gravel by percent weight and has coarse texture. |
|
|
|
|
Sand and Gravel |
Indicates the deposit
has approximately equal or slightly more sand than gravel by percent weight. |
|
|
|
|
Sand with Gravel |
Indicates the deposit
has more overall more sand than gravel by percent weight and has an overall
fine texture |
|
|
|
|
Sand occasional Gravel |
Indicates the deposit
contains mostly sand with few gravel-sized rocks and has a fine texture. |
|
|
|
|
Sand |
Indicates the deposit
is composed of sand and has a fine texture. |
|
|
|
|
Undetermined |
The texture of the
gravel pit was undetermined due to lack of exposure or geologic evidence to
make a determination. |
|
Ob_mod |
|
Text, 1 |
Ex: ~, >, < |
Modifiers to express
numeric approximations for the overburden thickness at a gravel pit ~
approximate, < less than > greater than |
|
Ob_val |
|
Number, 4 |
|
Gives a value for
overburden thickness |
|
Overbrdn |
|
Text, 15 |
|
Expresses overburden
thickness by possibly using one or both the modifier and value. |
|
Zstatus_b |
|
Text, 40 |
|
Associated with the
field status_a. Usually this field
further explains the condition of a partially or fully reclaimed gravel
pit. Examples include the following:
sloped indicates the pit walls were sloped, naturally vegetated means the
gravel pit is being reclaimed naturally through the revegetation of grass,
shrubs or trees, agriculture, parks, dump indicates the current land use. |