James Olson Minnesota DNR - Lands and Minerals GIS Analyst 651-259-5429 500 Lafayette Rd Saint Paul MN 55155 james.olson@state.mn.us 2018-07-13 12:24:29 http://www.dnr.state.mn.us/lands_minerals/aggregate_maps/completed/index.html M-102 Primary Sources of Construction Aggregate in the Twin Cities Seven-County Metropolitan Area - Sand and Gravel Sources 2014-07-23 Minnesota Geological Survey Minnesota DNR - Lands and Minerals The original data of sand and gravel aggregate sources was sourced from the Minnesota Geological Survey (MGS) for the M-102 project, Primary Sources of Construction Aggregate in the Twin Cities Seven-County Metropolitan Area. The dataset presented here was reformatted by the MN DNR in order to distribute it on an online map server of Aggregate Resources data. The original data file is called 'agsg99_polygon'. The datafile included codes rather than descriptions. The DNR reformatted the data by adding in descriptions for each code for easier reading and comprehension. Please consult the orignial MGS data, maps, and metadata at: http://conservancy.umn.edu/handle/11299/57004 According to the MGS, information that was used to map sand and gravel deposits used various criteria. Several operators and consultants in the aggregate industry, staff of the Materials Division of the Minnesota Department of Transportation and the Division of Minerals of the Minnesota Department of Natural Resources helped to establish the criteria. Deposits are classified by percentage of material retained on the number 4 sieve (4.76-millimeter pore space), sand and gravel thickness, thickness of overlying deposits, location of the water table, and relative amounts of subsurface information available Data was divided into primary sources, potential secondary sources, and gravel pits. It was subdivied by sieve data, thickness of sand and gravel deposit, thickness of overlying sediments, position of water table, and finaly data reliability. This is listed in table 2 of the M-102 map plates. To summarize the sand and gravel resource potential digitized by the MGS for the 7-county metropolitan area to assist in the goal of Minnnesota Statutes, section 84.94. The sand and gravel resouce potential spatial database is an interpretative data product intended to be used for planning purposes. For example, a community may want to differentiate and protect resources by their quality; they may want to separate resource extraction from other uses to minimize land-use conflict; or they may want to reduce haulage cost by identifying sources in proximity to a project because aggregate is a high bulk, low price commodity and transportation costs can significantly affect price. About Minnnesota Statutes, section 84.94 and the DNR's Aggregate Resource Mapping Program: The Aggregate Resource Mapping Program (ARMP) began in 1984 when the Minnesota Legislature passed a law (Minnnesota Statutes, section 84.94) to: Identify and classify aggregate resources out side of the Twin Cities metropolitan area; Give aggregate resource information to local units of government and others for making comprehensive land-use and zoning plans; Introduce aggregate resource protection; and Promote orderly and environmentally sound development of the resource. Aggregate Mapping Home Page: http://www.dnr.state.mn.us/lands_minerals/aggregate_maps/index.html Aggregate Mapping Methodology: http://www.dnr.state.mn.us/lands_minerals/aggregate_maps/methodology.html James Olson Minnesota DNR - Lands and Minerals GIS Analyst 651-259-5429 500 Lafayette Rd Saint Paul MN 55155 james.olson@state.mn.us http://images.dnr.state.mn.us/lands_minerals/aggregate/sgp_mgs_image.jpg sand and gravel sources, geological characteristics, construction aggregate potential, mgs, M-102, seven-county sand and gravel sources, geological characteristics, construction aggregate potential, mgs, M-102, seven-county Use Disclaimer: Every reasonable effort has been made to ensure the accuracy of the factual data on which this map interpretation is based. However, the Department of Natural Resources does not warrant the accuracy, completeness, or any implied uses of these data. Users may wish to verify critical information; sources include both the references here and information on file in the offices of the Minnesota Department of Natural Resources. Every effort has been made to ensure the interpretation shown conforms to sound geologic and cartographic principles. No claim is made that the interpretation shown is rigorously correct, however, and it should not be used to guide engineering-scale decisions without site-specific verification. This information should not be used to establish legal title, boundaries, or locations of improvements. Data Disclaimer The Minnesota Department of Natural Resources makes no representation or warranties, express or implied, with respect to the reuse of data provided herewith, regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, or reliability of this data for any purpose. The user accepts the data 'as is', and assumes all risks associated with its use. By accepting this data, the user agrees not to transmit this data or provide access to it or any part of it to another party unless the user shall include with the data a copy of this disclaimer. The Minnesota Department of Natural Resources assumes no responsibility for actual or consequential damage incurred as a result of any user's reliance on this data. Please read accompanying document: Minnesota DNR Data and Software License Agreement.pdf Other Compiled Aggregate Mapping GIS Datasets: Sand and Gravel Resource Potential; Crushed Stone Potential; Geologic Field Observations; Test Holes; and Status Map of Completed, In-Progress, and Requested Projects List of Completed DNR Aggregate Mapping Project's Web Pages to Download Maps and Original GIS Data and Metadata at: http://www.dnr.state.mn.us/lands_minerals/aggregate_maps/completed/index.html Aitkin County (2014) Stearns County (2012) Kanabec County (2012) Portions of Northern St. Louis and Northern Lake Counties (2010) Olmsted County (2010) Carlton County and Fond du Lac Reservation (2009) Mille Lacs County (2007) Meeker County (2006) Renville County (2003) Le Sueur County (2003) Itasca County (2003) - Contracted with MGS Benton County (2002) Dodge County (2002) Chisago County (2000) - Contracted with MGS Nicollet County (1999) Blue Earth County (1999) Clay County (1995) Isanti County (1991) Wright County (1989) Sherburne County (1987) true -97.23 -89.53 49.37 43.5 Data were digitized between 1999 and 2013. 2014-07-23 Seven-County Metropolitan Area, Minnesota The data is as complete as when the project was completed. If you need more information please consult the original project data and metadata found at the Aggregate Mapping Program's completed project page at: http://www.dnr.state.mn.us/lands_minerals/aggregate_maps/completed/index.html see lineage None The dataset presented here was reformatted by the MN DNR in order to distribute it on an online map server of Aggregate Resources data. The orignial data file is called 'agsg99_polygon'. The datafile included codes rather than descriptions. The DNR reformatted the data by adding in descriptions for each code for easier reading and comprehension. Please consult the orignial MGS data, maps, and metadata at: http://conservancy.umn.edu/handle/11299/57004 According to the MGS Map M-102, Sand and gravel deposits were mapped and named as simple land forms and divided into different classifications using various criteria. Several operators and consultants in the aggregate industry, staff of the Materials Division of the Minnesota Department of Transportation and the Division of Minerals of the Minnesota Department of Natural Resources helped to establish the criteria. Deposits are classified by percentage of material retained on the number 4 sieve (4.76-millimeter pore space), sand and gravel thickness, thickness of overlying deposits, location of the water table, and relative amounts of subsurface information available. http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm Sand and Gravel Sources from MGS M-102 Maps Attribute data from MGS Sand and Gravel Source Data Reformatted by DNR MGS_CLASS/MAP_CLASS A code given by MGS to define a map unit's sand and gravel source. Also shown are the related descriptions found in the field 'MAP_CLASS'. 1 Potential Secondary Source - Classifications (SG_CLASS) 4 and 5 2 Primary Source: Water table is less than 20 feet below the land surface with Moderate to Poor Quality 3 Primary Source: Water table is less than 20 feet below the land surface with Good to Moderate Quality 4 Primary Source: Water table is less than 20 feet below the land surface with Excellent to Good Quality 5 Primary Source: Water table is more than 20 feet below the land surface with Moderate to Poor Quality 6 Primary Source: Water table is more than 20 feet below the land surface with Good to Moderate Quality 7 Primary Source: Water table is more than 20 feet below the land surface with Excellent to Good Quality 8 Large Gravel Pit, or an area of more than one gravel pit 10 Primary Source: Water table is more than 20 feet below the land surface with Good to Moderate Quality 11 Primary Source: Water table is more than 20 feet below the land surface with Excellent to Good Quality 0 Blank (hole or donut) SOURCE_EVAL Source Evaluation Description Blank - No Potential Blank (hole or donut) Large Gravel Pit, or an area of more than one gravel pit Large gravel pit, or an area of more than one gravel pit or gravelpit Potential Secondary Source A secondary source must meet one or more of the following conditions: (1) less than 20 percent of the material is retained on a number 4 sieve; and/or (2) the deposit is less than 20 feet thick; and/or overlying sediment is more than 10 feet. Primary Source: Water table is less than 20 feet below the land surface Primary Sources—For classification as a primary source, the following criteria must be met: (1) more than 20 percent of the material is retained on a number 4 sieve; (2) the deposit is thicker than 10 feet; and (3) overlying sediment is no thicker than 10 feet. Quality of source where the water table is less than 20 feet below land surface (classifications 7 and 8) can be either Excellent to Good (less than 1.5 percent total spall materials); Good to Moderate (less than 5 percent total spall materials); or Moderate to Poor (generally more than 5 percent total spall materials). Primary Source: Water table is more than 20 feet below the land surface Primary Source: Water table is less than 20 feet below the land surface Primary Sources—For classification as a primary source, the following criteria must be met: (1) more than 20 percent of the material is retained on a number 4 sieve; (2) the deposit is thicker than 10 feet; and (3) overlying sediment is no thicker than 10 feet. Quality of source where the water table is more than 20 feet below land surface (classifications 1, 2, 3, and 6) can be either Excellent to Good (less than 1.5 percent total spall materials); Good to Moderate (less than 5 percent total spall materials); or Moderate to Poor (generally more than 5 percent total spall materials). SG_CLASS Numerical Classification of Sand and Gravel Deposits taken from Table 2 of Map M-102 1 Proportion of Material Retained on NO. 4 SIEVE is More than 20% and Thickness of Sand and Gravel Deposit is More than 40 Feet and Thickness of Overlying Sediments is 10 Feet or Less; Water table is more than 20 feet below land surface; Good subsurface data: Deep MnDOT test borings or many detailed water-well records from several drillers. 2 Proportion of Material Retained on NO. 4 SIEVE is More than 20% and Thickness of Sand and Gravel Deposit is 10-40 Feet and Thickness of Overlying Sediments is 10 Feet or Less; Water table is more than 20 feet below land surface; Good subsurface data 3 Proportion of Material Retained on NO. 4 SIEVE is More than 20% and Thickness of Sand and Gravel Deposit is more than 20 Feet and Thickness of Overlying Sediments is 10 Feet or Less; Water table is more than 20 feet below land surface; Limited Subsurface Data: Few borings or water-well records. Soil maps and surficial geology suggest the presence of gravel deposits. Some good deposits probably available, but boundaries uncertain. 4 Proportion of Material Retained on NO. 4 SIEVE is less than 20% and/or Thickness of Sand and Gravel Deposit is less than 20 Feet and/or Thickness of Overlying Sediments is more than 10 Feet; Water table is may be less than 20 feet below land surface; Limited Subsurface Data: Few or no soil-borings or water-well records are too generalized. Soil maps and surficial geology indicate possible sand and gravel deposits. Good deposits may be present in places, but in most cases this classification represents gravel-poor sand deposits or thick sand overlying gravel. 5 Proportion of Material Retained on NO. 4 SIEVE is less than 20% and/or Thickness of Sand and Gravel Deposit less than 10 Feet and/or Thickness of Overlying Sediments is more than 10 feet; Water table may be less than 20 feet below land surface; Good subsurface data 6 Proportion of Material Retained on NO. 4 SIEVE is More than 20% and Thickness of Sand and Gravel Deposit is 10-40 Feet thick over dolostone and Thickness of Overlying Sediments is 10 Feet or Less; Water table is more than 20 feet below land surface; Good to fair subsurface data. Presence of carbonate bedrock generally well established, but percentage of gravel in overlying sediments may vary, especially in the larger areas mapped. 7 Proportion of Material Retained on NO. 4 SIEVE is More than 20% and Thickness of Sand and Gravel Deposit is more than 20 feet thick and Thickness of Overlying Sediments is 10 Feet or Less; Water table is less than 20 feet below land surface; Good subsurface data. 8 Proportion of Material Retained on NO. 4 SIEVE is More than 20% and Thickness of Sand and Gravel Deposit is more than 20 feet thick and Thickness of Overlying Sediments is 10 Feet or Less; Water table is less than 20 feet below land surface; Limited Subsurface Data: Few soil-borings or water-well records. Soil maps and surficial geology suggest gravel deposits. Good deposits probably available, but boundaries uncertain. SG_QUALITY Sand and Gravel Quality Excellent to Good Quality (less than 1.5 percent total spall materials) Good to Moderate Quality (less than 5 percent total spall materials) Moderate to Poor Quality (generally more than 5 percent total spall materials) Not defined DEPOSIT Informally Named Sand and Gravel Deposits taken off Table 1 of MGS M-102 Map DEPOS_CODE Three-Letter Codes for Informally Named Sand and Gravel Deposits (see field 'DEPOSIT' for name) Please consult the orignial MGS data, maps, and metadata at: http://conservancy.umn.edu/handle/11299/57004 Provided below is the attribute table reformatted by the MN DNR's Aggregate Resource Mapping Program. 1.0 20260331 04402700 TRUE