GRAVEL PITS

DODGE COUNTY, MINNESOTA

Field | Description
Main ID Information | Metadata Updated 2007
Title | Dodge County Aggregate Resource Evaluation - Gravel Pits
Filename | Gvl_pits (ArcView Shapefile)
Abstract | This dataset consists of location information about the gravel pits and quarries within Dodge County.
Place Keywords | Dodge County, Minnesota
Theme Keywords | Gravel Pits, Quarries
Time Period of Content | Fall 2001 – Spring 2002
Parent Theme | NA
Spatial Extent of the Data | Dodge County, Minnesota
Contact Person | Aggregate Resources Mapping Program
Contact Person Organization/Division | Department of Natural Resources, Division of Lands and Minerals
Contact Person Position | Geologist or GIS Specialist
Contact Address | 500 Lafayette Road, Box 45
Contact City | St. Paul
Contact Zip Code | 55155-4045
Contact Voice Phone | 651-259-5959
Contact Fax Phone | 651-296-5939
Additional ID Information |
Originator | Department of Natural Resources, Division of Lands and Minerals, Mineral Potential Section
Purpose | To display the gravel pit and quarry locations within Dodge County.
Progress | Complete
Currentness Reference | The gravel pits notes during field work are from fall 2001 to spring 2002. The gravel pits digitized from 1:24000 USGS quadrangles are the same age as the quads – from 1962 to 1974, with two quads photo revised in 1982 and one quad photo inspected in 1980. The gravel pits located from the Soil Survey are from 1961, the date of the published Soil Survey.
Maintenance Frequency | None planned
Access Constraints | NA
Use Constraints | NA
Associated Data Sets | County Aggregate Mapping Program datasets for Dodge County, including data on sand and gravel potential, crushed stone potential, field observations, rock piles, and test pit quality data.
Data Quality |
Attribute Accuracy |
Logical Consistency | NA
Completeness | Described in “lineage” below.
Horizontal Positional Accuracy | These points were captured from several different sources, including USGS 1:24000 quadrangles, 1:12000 USGS DOQs (from 1991), Natural Resources Conservation Service Soil Survey maps, and the ASIS (Aggregate Source Information System) database from the Minnesota Department of Transportation. The points were digitized using Arcview, using onscreen digitizing.
Vertical Positional Accuracy | NA
Lineage | These points were gathered from a variety of sources, some were digitized within a few meters, others were located on DOQs (Digital Orthophoto Quadrangles) and DRGs with on screen digitizing. The gravel pits and quarries are fairly large, thus the points are located somewhere in the disturbed area, and should be very accurate.
Source Scale Denominator | 24000
Spatial Reference |
Horizontal Coordinate Scheme | UTM
Ellipsoid | GRS80
Horizontal Datum | NAD83
Horizontal Units | Meters
Distance Resolution | NA
Altitude Datum | NA
Altitude Units | NA
Depth Datum | NA
Depth Units | NA
UTM Zone Number | 15E
Raster only |
Cell Width | NA
Cell Height | NA
Spatial Data Organization |
Geographic Reference for Tabular Data | NA
Native Dataset Environment | ArcView 3.1 / ArcInfo 8,0.2
Vendor Specific Object Type | NA
Tiling Scheme | NA
Spatial Object Type | Point
Transfer Size | 128 kb
Entities -- Attributes |
Entity-Attribute Overview | This dataset consists of location information about the gravel pits and quarries within Dodge County. This shapefile can be joined to dotqual.dbf to get more information about the gravel pits that list the Source as “MNDOT ASIS”. ArcView specific fields include shape (i.e., feature type = point), area (0 for points), perimeter (0 for points), gvl_pits_ (unique id for point, assigned by the software), gvl_pits_id (an id usually assigned during theme creation).
Entity-Attribute Detailed Citation | Gravel pit specific attributes are described in the table below.

Table Name | Field Name | Begin Column | Definition | Valid Values | Descriptions
Gvl_pits.shp | Pit_q_id |  | Number, 3,0 | Ex: 1,2,3,4,5,6,7.... 341, 342, 343, 344 | Gravel pit and quarry unique ID (1-344).
| 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).
| Type |  | Text, 16 | Gravel Pit | Gravel Pit
|  |  |  | Sand Pit | Sand Pit
|  |  |  | Quarry | Quarry
| Asis_num |  | Number, 5,0 | Ex: 0, 20041, 20029, 20030, etc… | Aggregate Source Information System Number (MN/DOT Database). An empty field means that is does not have an ASIS number. 20Xxx refers to Dodge County (20) 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 land-owners 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.
| Thickness |  | Text, 8 | Ex: 5-10, 15-20, ect… | Gives the range of thickness of the aggregate observed at the pit or quarry.
| Watertable |  | Text, 8 | Ex: >10, >20, >25, 10, 25,<20, etc | Describes the depth to the watertable within a pit or quarry. If 20 feet of gravel was exposed and there was no water table encountered, then >20 was used.