AGGREGATE POTENTIAL – POLYGONS

DODGE COUNTY, MINNESOTA

Field | Description
Main ID Information | Metadata Updated 2007
Title | Dodge County Aggregate Resource Evaluation
Filename | Cs02xpy3 (ArcView Shapefile)
Abstract | This dataset consists of information about the geology, geological characteristics, and aggregate potential of bedrock units. Twelve fields relate to crushed stone characteristics, including probability, quality, overburden thickness, and deposit size, of the map unit. These characteristics were used to calculate the aggregate potential of the map unit for crushed.
Place Keywords | Dodge County, Minnesota
Theme Keywords | Surficial Geology, Geological Characteristics, Aggregate Potential, Crushed Stone
Time Period of Content | Fall 2001 – Spring 2002
Parent Theme | NA (FIELDOBS)
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 summarize the geological characteristics, surficial geology, and crushed stone potential of the different bedrock units. To help categorize the geological characteristics and incorporate them into a model to help determine the crushed stone potential of the deposit.
Progress | Complete
Currentness Reference | All data was gathered in the fall of 2001 and compiled in the fall of 2001 through the spring of 2002.
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 | The crushed stone resource units were delineated using depth to bedrock information from the county well index, soil surveys, and field observations. Generalizations were made; this is a reconnaissance-scale study (1:100,000).
Horizontal Positional Accuracy | 1:100,000 for crushed stone.
Vertical Positional Accuracy | NA
Lineage | The first step in determining the distribution of aggregate resources is to understand the recent geological history of the area. The geological history basically tells us the story, or sequence of events, of when the aggregate and other sediments were deposited. By understanding this story we can determine where the aggregate was deposited, as well as some of the general characteristics about the material. The majority of the limestone was found along the eastern river valleys. Data about the bedrock and depth to bedrock includes well locations with well log information indicating a depth to bedrock; outcrops from the soil information; outcrops observed in the field. To interpret the depth to bedrock, contour lines were constructed by on-screen digitizing using ARCVIEW.
Source Scale Denominator | 1:100,000
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 | 15 Extended
Raster only |
Cell Width | NA
Cell Height | NA
Spatial Data Organization |
Geographic Reference for Tabular Data |
Native Dataset Environment | ArcView 3.1/ArcInfo 8.0.2
Vendor Specific Object Type | Polygon
Tiling Scheme | County
Spatial Object Type | Polygon
Transfer Size |
Entities -- Attributes |
Entity-Attribute Overview | The polygons of crushed stone potential.
Entity-Attribute Detailed Citation | ArcView specific fields include shape (i.e., feature type = polygon), area (given in square meters), perimeter (given in meters), Cs02xpy3_ (counter field - assigned by the software), and Cs02xpy3_i (an id usually assigned during theme creation). The aggregate potential attributes for the polygons are described in the table below.

Table Name | Field Name | Begin Column | Definition | Valid Values | Descriptions
Cs02xpy3.dbf | Bdrk_mapu |  | Number,4,0 | Ex: 305, 239, 303,etc…. | Numbers assigned to specific units of bedrock
| Bdrk_desc |  | Text, 60 | Ex: Bedrock-Galena-Prosser/Stewartville (Low) | A short, summarized description of the bedrock mapping units. Names of units are based on established units for the bedrock of southeastern Minnesota
| Cs_pot_pl1 |  | Text, 17 | Ex: Limited and Massive Limestone. | Crushed Stone Potential that is depicted on plate 1 (Significant Aggregate Resources). Bedrock refers to those units that have a high to moderate potential of containing significant crushed stone resources. Desirability is determined by the crushed stone potential attributes (as described below). Limited implies that there is little to no economic value to the bedrock unit. Massive Limestone implies that the limestone is thick with few shale partings.
| Cs_pot_pl2 |  | Text, 12 | High, Moderate, Low, Limited. | Crushed Stone Potential that is depicted on plate 2 (Aggregate Resources). High, Moderate, and Low refer to the relative potential of the Crushed Stone resources. Desirability is determined by the Crushed stone potential attributes (as described below). Limited refers to those units where the depth to crushed stone is greater than 40 feet.
| Cs_prob |  | Text, 11 | Very High, High, Moderately High, Low. | The relative degree of certainty that crushed stone exists within a unit. Based on air photo interpretations, field observations, CWI, drilling, presence of quarries, etc. Each unit is relative to the other units and range from very high to very low.
| Cs_thick |  | Text, 10 | Ex: >50 | The assumed thickness of the crushed stone (in feet).
| Cs_overbrd |  | Text, 12 | Ex: 0-20, 20-30, 30-40, >40. | The assumed range of overburden thickness of a crushed stone deposit (in feet).
| Cs_quality |  | Text, 10 | Ex: High, Limited, Low | The quality of the bedrock unit based on the number of shale partings. The lower amount of shale, the higher the quality. Limited includes non-crushed stone units such as sandstones.
| Cs_min |  | Number,3,0 | Ex: 0,5,10,15,20,50 | Describes the minimum thickness of the crushed stone unit.
| Cs_max |  | Number,3,0 | Ex: 0, 5, 10, 20, 30, 40, 50 | Describes the maximum thickness of the crushed stone unit.
| Csover_min |  | Number,3,0 | Ex: 0, 10,20 | Describes the minimum thickness of the overburden covering the crushed stone.
| Csover_max |  | Number,3,0 | Ex: 0, 3, 5, 10, 20, 30 | Describes the minimum thickness of the overburden covering the crushed stone.