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.