Prepared and Published with the Support of COUNTY ATLAS SERIES ATLAS C-48, PART A MINNESOTA GEOLOGICAL SURVEY THE NOBLES COUNTY BOARD OF COMMISSIONERS, Harvey Thorleifson, Director THE MINNESOTA DEPARTMENT OF NATURAL RESOURCES, AND Nobles County THE MINNESOTA ENVIRONMENT AND NATURAL RESOURCES TRUST FUND Plate 1—Database Map AS RECOMMENDED BY THE LEGISLATIVE-CITIZEN COMMISSION ON MINNESOTA RESOURCES

E

ESTON W. MURRAY 96° W. 95° 52' 30" W. 95° 45' W. 95° 37' 30" W. 95° 30' MURRAY COTTONWOOD

PIP COUNTY COUNTY R. 42 W. R. 41 W. R. 39 W. ! ! ! R. 43 W. R. 40 W. COUNTY COUNTY D E ! ! ! D! ! ! ! ! ! ! ! ! ! D! ! D! ! D! ! D! ! ! ! ! E 440 ROCK Willow E Dundee ! JACKSON Lake E ! COUNTY 500 COUNTY 6 540 1 6 1 6 1 1 6 6 440 520 E E 1 E E E 460 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! 520 ! ! ! ! ! ! ! 520 ! E E Ju 440 dicia ! 480 l D itch Kinbrae Ju ¤59 26 D dicia Lake 500 440 E l D ! ! ! ! itch ! ! ! ! ! ! ! ! ! ! ! ! E ! ! ! ! ! ! E ! ! ! E ! ! ! ! ! ! 12 ! Kinbrae 460 Jack Lake Slough RD GRAHAM LAKES DATABASE MAP LEOTA WILMONT BLOOM SEWA D ! ! ! ! ! ! ! !D ! D ! ! D ! ! ! ! D ! E! 500 D! D! D! ! D ! ! ! ! ! ! ! ! E West 440 T. 104 N. East T. 104 N. 540 460 Graham 440 540 Graham Lake Lake By E E Creek ! ! E ! ! ! ! ! ! ! ! ! ! ! ! ! D! ! D! ! D ! ! D ! D ! D! ! D D ! ! E ! Ja 520 ck C Margeurite C. Pettus and V.W. Chandler n r eek )91 480 pada ! mpe E ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ha ! ! ! ! ! ! ! ! ! ! ! ! ! C 440 2020 520 36 31 31 31 36 31 36 36 31 36 Kanaranzi Creek Wilmont ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! E! ! ! ! ! ! ! E E E ! 520 1 6 1 1 6 1 6 1 6 6 43° 45' N. ! E 43° 45' N. ! !500 D! ! !D ! ! ! ! ! ! ! D! ! D! D! ! D! !D ! !D D ! ED D ! D! D ! D Lismore D Judicial Ditch 76l 460 E 520 E 460 440 ! ! ! ! ! ! ! ! ! ! ! ! ! ! D! ! ! ! ! ! ! ! ! ! ! ! E ! ! ! ! 520 E

460 460 520 E 520 460 E ! ! ! ELK! ! ! ! ! ! HERS! EY ! ! ! T. 103 N. ! ! ! LISM!OREE ! !E ! ! ! LARKIN! ! !E ! ! S! UMMIT LAKE! ! E 500 460 T. 103 N. Judicial Ditch 8 !

460 ! ! ! ! ! ! ! ! ! ! ! !D ! ! ! ! ! ! ! ! ! ! 520! ! ! ! ! ! ! E 460 480 ¤59 Elk Creek Brewster E County Ditch 5 ! ! ! ! ! ! ! ! D ! ! D l ! ! ! ED! ! D! ! D ! ! D ! D! E ! D! ! D D E ! D! ! D! 520 D INTRODUCTION OTHER INFORMATION D 480 ! 36 The public health and economic development of Nobles County are directly dependent on the Field sites are natural and artificial exposures of unconsolidated Quaternary deposits that 36 31 36 Elk Creek 31 36 31 36 31 E 31 were described in detail; samples from many sites were texturally analyzed. Field sites include 480 wise use and management of its land and water resources. Geologic and hydrologic information 500 460 ! ! ! ! ! ! ! ! ! ! ! ! ! ! are essential before decisions are made that affect natural resources. Although the amount of stream and river cuts, gravel pits, excavations, and road cuts. ! ! ! ! E! ! ! ! ! ! ! ! ! ! ! ! l h 520 geologic information required for making specific decisions can vary, the information will not anc Okabena Textural analyses express the proportion of sand-, silt-, and clay-sized particles that make st Br 1 )60 480 1 460 be used if it is unavailable when needed, or if it is available only in a highly technical form, or 6 1 6 6 6 1 6 1 up a sample. The samples analyzed were taken from natural and artificial exposures, Giddings ! 500 Cr scattered in many different maps and reports. The databases described here address this need. E anzi Creek,Ea E e holes, and the rotary-sonic cores. They are helpful in determining the origin, correlation, and ar ek n ! ! ! ! ! 460 ! D! ! E! ! ! ! ! ! Ka ! ! ! ! ! 500 ! E ! ! l! E ! ! ! ! County Geologic Atlases, prepared jointly by the Minnesota Geological Survey and the hydrologic properties of unconsolidated sediments. ! Minnesota Department of Natural Resources, present detailed geologic and hydrologic information l ! Statewide gravity and aeromagnetic (airborne-magnetic) data that are available at the E E E Okabena in an interpretive as well as descriptive form. Maps and texts summarize basic geologic and Minnesota Geological Survey are used to assist mapping Precambrian geology. The utility of Cre ! ! ek hydrologic conditions at a county scale, and interpret these conditions in terms of the impacts ! ! ! ! these two datasets relies on the strong contrasts in density and magnetization that commonly D! D ! ! D E! lD! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! of possible land- and water-use decisions. exist between various Precambrian rocks. In Nobles County, Precambrian rocks either form 460 !! !! ! ! ! !! !! !!! ! ! Several sources commonly provide information about an area or an individual property, the bedrock surface or directly underlie a variably thick cover of Cretaceous strata. The lD! ! !! D !! ! !! ! ! !! 480 !!! E NBR-1 but they may use different classification schemes to describe the same geologic materials. As aeromagnetic data in Nobles County were acquired 700 feet (213 meters) above ground along 90 Adrian §¦90 §¦90 § ! LD ! ! ON !l ! ! IN! ! ! a result, discrepancies in interpreting the data may arise or the different sources may appear flight lines spaced 0.3 mile (0.5 kilometer) apart, and are compiled into a 328-foot (100-meter) ¦ ! ! ! T ! ! ! !SIDE ! ! ! ! ! ! DEWA D 520 RTHING D ! D LORDA D T. 102 N. 460 EWEST D OLNEY D! ! E WD O T. 102 N. !!! to contradict each other. For example, water-well drillers may describe glacial till as "clay," grid (line data are not indicated on the map due to high density). The gravity data are based Worthington N. 43° 37' 30" N. ED 43° 37' 30" but engineering records will describe it as "clayey sand." Both descriptions are acceptable for on ground stations that are generally spaced 1.0 mile (1.6 kilometers) apart along roads and E 460 460 Rushmore NBR-2 520 D !! their original purpose of describing the physical attributes of the material. "Clay," the term driveable trails, and these data are compiled into a 3,281-foot (1,000-meter) grid. Derivative- Kanaranzi Creek )91 l 500 ! !! l ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! D ! !E ! ! ! ! ! ! ! E ! ! used by well drillers, defines the general inability of the till to yield groundwater to a well. enhanced grids of the gravity and aeromagnetic data are used in conjunction with information E 520 D E ! Okabena Lake ! ! 480 460 "Clayey sand," the term from the engineering record, defines the physical composition of the from bedrock wells. E E till relative to particle size and engineering properties. The geologist must take the analysis one Passive seismic soundings provide information based on measurement and analysis of ek D e step further and define the material in terms of how it formed rather than how it is to be used. ambient shear- and surface-wave energy in the ground that allow a calculation of the depth to r ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! C ! ! ! ! ! ! l! ! ! l ! ! E ! ! In this example, till consists of an unsorted mixture of rock fragments ranging in size from clay bedrock (thickness of unconsolidated deposits) beneath that point. The measurements employ Maroney !! to cobbles and boulders, and it is interpreted by the geologist to have been deposited directly a recording seismograph system that is implanted into the ground surface and records ambient

480 Lake 36 31 36 !!! 36 31 by glacial ice. Understanding the process by which the material formed allows geologists to 31 D 31 ! Ocheyedan River 36 ground vibrations in three orthogonal directions (two horizontal and one vertical) during a 36 31 l E ! 480 make predictions about what lies between and beyond data points. 16-minute interval. The method is called passive because no energy is directly input into the ! ! ! ! D! ! ! ! ! ! ! ! ! ! ! ! E ! ! ! ! ! ! ! ! ! ! ! ! Rock ground at the time of measurement, such as is the case for conventional seismic sounding. 480 All of the types of data described on this plate were interpreted by geologists or 1 480 1 DD 6 hydrogeologists to make them meaningful for mapping purposes. The 1:100,000 scale of Instead, the unit measures background vibrations from a variety of natural and artificial sources

500 e l t t 6 1 6 i 6 6 1 L 1 the maps in this atlas was chosen because it shows the geologic and topical studies of the that include wind, machinery, and traffic. The averaged horizontal spectra of the seismic noise D Ocheda l Ditch 9 D 500 Judicia Lake ! county while keeping the physical size of each plate to a manageable level. As a result, some is divided by the corresponding vertical spectrum, and the resulting Horizontal to Vertical ! ! ! ! ! ! ! D! ! D! ! D! ! D! ! D! ! D! ! 500! D ! ! D ! ! ! ! E ! ! ! E 480 E detailed information that was gained by data interpretation and mapping cannot be shown on Spectral Ratio (HVSR) should display a prominent peak that closely approximates the resonant ! these maps or discussed in the texts. Some of this information is available in digital files that frequency (shear wave) of the unconsolidated sequence overlying the bedrock surface (Chandler 480 !! D l 480 accompany the atlas. and Lively, 2014). In general, depth to bedrock calculated by this method can have errors 480 500 l ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ED! ! ! up to 25 percent of the depth; however, in areas with little to no other data, this is still useful ! ! ! ! ! 480 Whether to use the atlas alone, or in combination with the databases, depends on the 480 amount of detail needed. Generally, database information must be used to evaluate site-specific information and many soundings can be inexpensively collected over a short period of time 480 conditions. with one or two operators. A total of 103 passive seismic stations were acquired in Nobles ! County as part of this Geologic Atlas. E N LAKE )264 460 OM ! ! ! W ! ! ! !INDIA ! ! ! T. 101 N. 440 ! GRAND! !PRAIRIE! ! ! ! !LITTLE! ROCK! ! ! ! ! RANS ! ! ! ! E! EBIGELOD T. 101 N. E THE DATABASE MAP Seismic refraction soundings measure the time required for sound or pressure waves to k Ocheyedan Round Lake travel from a source through the subsurface and be refracted back to a receiver. Travel time ee The types, locations, and density of information used to prepare the Nobles County D r 500 C can be correlated with the density and rigidity of the geologic material. Precambrian and C ¤59 ounty Ditch 1 Atlas are shown on this map. The data are described below to aid the user in assessing what ian )60 500 l Paleozoic rocks commonly exhibit pressure-wave velocities that are 1.5 to 2.5 times those of weg ! ! ! ! ! ! ! ! Little Rock River ! ! Otter Creek ! 500! ! ! ! ! ! ! types may be useful for a particular information need. The Database Map serves as a guide r ! ! ! ! ! ! ! ! ! ! ! ! ! E unconsolidated Quaternary sediments below the water tables. The spacing of the receivers No E 500 to the precision of the other maps in the atlas. It shows where data are sparse or lacking and (geophones) and the arrival times (measured in milliseconds) are used to calculate the depth to D River interpretation and extrapolation were required to prepare the maps. E 500 bedrock. Seismic refraction soundings are more labor intensive than passive seismic sounding, Ellsworth D 480 ! but can provide velocity information and higher-quality depth estimates. Four seismic refraction ! ! ! ! D ! ! D ! ! ED ! ! D ! ! D ! ! D ! D ! ! !D ! ! D ! ! ED ! D ! ! D D DRILL-HOLE INFORMATION 440 460 soundings were previously acquired in Nobles County as part of earlier investigations, and three 480 Bella Indian 500 31 Lake Lake 460 additional soundings were acquired as part of this Geologic Atlas. The seismic refraction data 36 A record of water-well construction (well driller's log) is a water-well contractor's 31 )91 36 31 36 31 36 36 31 JACKSON ROCK Iowa or expolorationist's description of the geologic materials penetrated during drilling and the were acquired by the Minnesota Department of Natural Resources. Bigelow COUNTY COUNTY 480 Indian Lake Slough Lake ! E! ! ! ! ! ! E ! ! ! ! ! ! E E construction materials used to complete the well. Hydrologic data, such as the static water level and test-pumping results, are commonly included. Before any driller's log can be used, DATABASE MANAGEMENT IOWA R. 43 W. R. 42 W. R. 41 W. R. 40 W. R. 39 W. IOWA W. the location of the well must be verified, and a geologist must interpret the log. Driller's logs 96° W. 95° 52' 30" W. 95° 45' W. 95° 37' 30" W. 95° 30' All of the data shown on the map were plotted on maps at 1:24,000 or finer resolution are the primary source of subsurface geologic and hydrologic data for Nobles County; about Digital base modified from the Minnesota Department of GIS compilation by R.S. Lively and assigned inventory numbers. Included with the Nobles County Atlas are regularly updated Edited by Lori Robinson 1,280 logs were used for this atlas. Transportation BaseMap data; digital base annotation by SCALE 1:100 000 databases containing digital GIS files, developed to provide easy access and rapid retrieval of Corey J. Betchwars. 1 3 4 Scientific investigation holes are drilled by various agencies to study the nature of the Elevation contours were derived from the U.S. Geological Survey 0 1 2 5 MILES these site-specific data. subsurface material. Geologic logs were generated that describe the material penetrated for 30-meter Digital Elevation Model (DEM) by the Minnesota Computer storage and retrieval systems are ideal for manipulating large amounts of data Geological Survey. 1 0 1 2 3 4 5 6 7 8 KILOMETERS each hole. In Nobles County this includes holes drilled by and for the U.S. Geological Survey, because automated geologic databases can be designed to interact with other computer files, Universal Transverse Mercator Projection, grid zone 15 Water Resources Division, including soil auger holes, test wells, and observation wells, to 1983 North American Datum CONTOUR INTERVAL 20 METERS such as land-use data. Such interaction permits more efficient assessment of cause-and-effect determine the hydrologic properties of local and regional aquifers. relationships concerning natural resources than is commonly possible with manual files. Core samples were collected at various sites throughout Nobles County as a means to establish the nature of the subsurface material. Rotary-sonic cores were collected by the DIGITAL DATABASES Minnesota Geological Survey for this project from two sites in the county (labelled NBR-1 and NBR-2) to aid the interpretation of the Quaternary deposits. The coring technique enables Computerized files were developed for point-source data such as wells and borings in recovery of a continuous core, 3.5 inches (8.9 centimeters) in diameter, from glacial deposits Nobles County. They use Public Land Survey descriptions, Universal Transverse Mercator MAP SYMBOLS and bedrock (where intersected). It provides excellent subsurface samples for detailed study and (UTM), and latitude-longitude coordinates as location criteria; thus, they are compatible with comparison with cuttings, geophysical logs, and driller's logs from surrounding sites. Detailed the natural-resource databases housed at the Minnesota Land Management Information Center Record of water-well construction (well driller's log) geologist's logs for the rotary-sonic cores are shown on Plate 5, Supplemental Quaternary (LMIC). One computerized database developed for Nobles County by the Minnesota Geological Stratigraphy. Bedrock core is more commonly collected using a diamond bit rotating at the Survey is the County Well Index (CWI). Scientific investigation hole end of a drill rod. A column of rock moves up the drill pipe and is recovered at the surface County Well Index (CWI)—Information from water-well records and other subsurface Diamond drill core sample for study. Bedrock core exists for six sites in Nobles County. The Minnesota Geological drill-hole data such as exploration holes is entered into this statewide database. Each well Survey collected three of the core samples as part of an earlier regional hydrogeologic study log is assigned a six-digit unique number and each exploration drill hole is assigned either Rotary-sonic core sample (Setterholm, 1995), and the other three core samples were collected by mineral exploration a five- or six-digit unique number. These reference numbers are also used by state agencies l Cutting sample companies. The cores are available for inspection at the Drill Core Library in Hibbing (the and the Water Resources Division of the U.S. Geological Survey. Elevations are expressed state repository for bedrock and earthen material core samples collected during exploration, in feet above sea level and were determined from either topographic maps (see the index to Borehole geophysical log engineering, and geoscience research programs across Minnesota, maintained by the Minnesota 7.5-minute quadrangles) or Minnesota's lidar high-resolution elevation dataset. Elevations ! Soil boring Department of Natural Resources). from the topographic maps are generally accurate to plus or minus 5 feet (1.5 meters), and the Note: More than one Soil borings are test holes drilled to obtain information about the physical properties of lidar elevations are generally accurate to within 3 feet (1 meter). The street address of each Giddings probe hole symbol can occur at LOCATION DIAGRAM subsurface materials for engineering, mapping, or exploration purposes. They are logged by well is also included wherever possible to provide data users with a well-location system that the same location Field site an engineer or a geologist using a variety of classification schemes based on particle sizes, is compatible with local regulatory programs. Software at the Minnesota Geological Survey is used to display and tabulate many of the data elements contained on the original well log. E Textural analysis penetration rate, moisture content, and color. Soil-boring data collected by the Minnesota Department of Transportation is concentrated mainly along Interstate Highway 90 and State The program also denotes if there are additional data such as borehole geophysical logs, cutting ! Gravity data Highway 60. Descriptions of the geologic materials penetrated are interpreted by Minnesota samples, or core for an individual record. D Passive seismic sounding Geological Survey geologists for mapping purposes. The County Well Index is stored in a database that consists of 10 related tables. These Cutting samples collected during drilling provide physical evidence of subsurface geologic tables contain information such as well depths, well construction, addresses, aquifers, dates D Seismic refraction sounding materials. Cuttings are the samples generated as the drill bit cuts through the subsurface drilled, static water levels, and pumping-test data. They also contain alternate well identifiers material and are used to interpret and verify driller's logs. They are logged and stored at the such as permit numbers or emergency-service numbers, and the well stratigraphy (the geologic Minnesota Geological Survey. Cutting samples collected during mineral exploration drilling materials encountered during drilling). are stored at the Drill Core Library in Hibbing. CWI application software developed by the Minnesota Department of Health provides Borehole geophysical logs are collected by Minnesota Geological Survey staff, other two types of reports: government agencies, and private entities by lowering instruments down a well or drill hole WELL LOG contains all the information about the well as it was reported by the contractor Unique Well Number County Nobles MINNESOTA DEPARTMENT OF HEALTH Entry Date 1992/01/16 and measuring the physical and chemical properties of the geologic materials through which (Fig. 1). There may also be additional location information, land-surface elevation, Quad Reading WELL AND BORING RECORD Update Date 2017/08/23 the hole passes. Different logging techniques measure naturally occurring gamma radiation, aquifer designation, and remarks about the drill holes. 453619 19B Quad Id MINNESOTA STATUTES CHAPTER 1031 Received Date spontaneous potential, and resistivity. Gamma logs characterize in graphic form the geologic WELL STRATIGRAPHY contains the geologic log described by a well driller (Fig. 2). A Well Name DNR OB 53009 (HERLEIN-BOOTE WMA) Well Depth Depth Completed Date Well Completed formations penetrated. Spontaneous potential and resistivity are mainly used to locate water geologist makes stratigraphic interpretations based on this description, and on her or Township Range Dir Section Subsection Field Located MNDNR levels in wells and the depth of the well casing. An interpretive log is prepared by a geologist his knowledge and understanding of the geology of Nobles County. The interpretations 142.00 ft 134.50 ft 1988/05/16 102 40 W 7 AAAADA Elevation 1653.00 ft. H W T E S from the geophysical log and correlated with drilling samples from the same hole, information E T W E are augmented in some cases by additional data sources, such as cuttings, borehole A N N N S D Drillhole D N O O A L N obtained from nearby outcrops, or a geophysical log from a nearby drill hole. Geophysical geophysical logs, or core. Only those drill holes with verified locations have stratigraphy T E M D U U Angle K Y L IL F D A U logs can provide high-quality subsurface geologic and hydrologic information for wells that assigned to them. L W F S Drilling Method Non-specified Rotary have little or no other information available. Logs can be viewed at the Minnesota Geological Other digital data—Details about other types of data shown on this plate are available Drilling Fluid Well Hydrofractured? YES NO Survey or accessed online (http://z.umn.edu/borehole_geo). The geologic interpretations are in attribute tables for individual GIS shapefiles included in the atlas products. These include available through the County Well Index database described below. From ft. to information that is part of the Quaternary Data Index (QDI), an internal working database. The Use observation well Giddings probe holes are borings of glacial materials, 2 inches (5.1 centimeters) in diameter, Quaternary Data Index contains information from field sites, rotary-sonic cores, soil borings,

N collected by Minnesota Geological Survey staff using a truck-mounted hydraulic auger. A Type Drive Shoe? YES NO Hole Diameter (in.) Giddings probe holes, soil auger holes, and textural analyses. Some detailed information Casing Plastic O R E T N G E description was generated at every site and samples were taken for textural analyses at most Diameter 2 Depth 129.5 IA N G T associated with these data sources is not included in digital files that are part of this atlas. This 6.25 To 142.0 L N IA N I IN S O A D H in. from to ft. R I H T W locations. Samples were generally taken about every 5 feet (1.5 meters), at unit contacts, or includes descriptions of cutting samples, borehole geophysical logs, and additional information 2.00 0.00 129.50 lbs/ft N A T D R R E G A D E R A O R A R O B where the geologist believed it was important. on passive seismic data. It is stored in various formats and can be obtained by request from M N W Description Color Hardness From To (ft.) the Minnesota Geological Survey. TOPSOIL BLACK 0 2 Soil borings and mineral exploration records commonly contain detailed information that CLAY TILL SILTY TRACE SAND LT. BRN 2 12 is not part of the files included in this atlas. The information can be accessed in other digital Screen Yes Open Hole(ft.) From to and paper files from the Minnesota Geological Survey. In addition, data may be obtained CLAY SILTY TRACE SAND AND GGRAY 12 55 Make JOHNSON Type plastic from the sources of the records, such as the U.S. Geological Survey. Soil-boring data from the CLAY SILTY TRACE SAND & GRAGRAY 55 90 N Diamter Slot Length Set O E H E T Minnesota Department of Transportation, Foundations Unit may be found on their web page T K W R G A GRAVEL 90 91 2.00 25 5 130 ft. to 135 ft. R S W O N L O O I H (https://www.dot.state.mn.us/materials/foundations.html). Mineral exploration records may be N M L H D W T CLAY TILL SILTY SANDY TR. GRAGRAY 91 118 IA H E T N S S U R IG R U obtained from the files maintained by the Minnesota Department of Natural Resources Drill L U O L D B O O R S CLAY TILL SILTY SANDY TR. GRALT. BRN 118 129 E A W R Core Library (https://www.dnr.state.mn.us/lands_minerals/dc_library.html). SAND MEDIUM TO COARSE, GR 129 135 CLAY SILTY SANDY LT. BRN 135 142 FUTURE DATA COLLECTION

Static Water Level INDEX TO 7.5-MINUTE QUADRANGLES Additional geologic information is generated continuously as new water wells are drilled, 86.00 ft. land surface Date measured 1988/05/17 construction activities expose more bedrock, or additional wells are tested for water quality. Pumping Level (below land surface) To address this, the library of information prepared for Nobles County is flexible so that old ft. after hrs. pumpting g.p.m. data can be reevaluated in light of new information, and new forms of data can be added if required. The need to manage groundwater and other natural resources wisely will never become Wellhead Completion outdated. Future demands on these resources will require current data to assess the impacts. Pitless adapter manufacturer Model ü ü 12 in. above grade Casing Protection ACKNOWLEDGEMENTS At-grate (Environmental Wells and Borings ONLY) Basement offset

ü YES NO NOT SPECIFIED The staff from the Environmental Services Department of Nobles County Public Works Grouting Information Well grouted? Unique Well Number County Nobles MINNESOTA DEPARTMENT OF HEALTH Entry Date 1992/01/16 contributed greatly to the development of the County Well Index database. We thank local Material well grouted, type unkFrom 0.0 To 30.0 ft. 0.00 Quad Reading WELL AND BORING RECORD Update Date 2017/08/23 453619 Quad Id 19B MINNESOTA STATUTES CHAPTER 1031 Received Date water-well contractors and landowners for their valuable assistance. Well Name Township Range Dir Section Subsection Depth Drilled Depth Completed Date Completed Lic/Reg. No. Driller Name REFERENCES DNR OB 53009 (HERLEIN-BOO 102 40 W 7 AAAADA 142 ft 135 ft 1988/05/16 91353 WIEDERHOLT, D Chandler, V.W., and Lively, R.S., 2014, Evaluation of the horizontal-to-vertical spectral ratio Elevation 1653.00 ft. Method LiDAR 1m DEM (MNDN Aquifer Quat. buried artes. aquif Depth to Bedrock ft. Screen 129.5-134.5 SWL 86 (HVSR) passive seismic method for estimating the thickness of Quaternary deposits in Nearest Known Source of Contamination Field Located Mn Department of Natural Resources Location Method Universal Transverse Mercator(UTM) - NAD83 - Zone 15 - Meters Minnesota and adjacent parts of Wisconsin: Minnesota Geological Survey Open-File feet Direction Type Program Input Source Minnesota Geological Survey UTM Easting (X) Report 14-01. Well disinfected upon completion? YES NO UTM Northing (Y) Uni No.Verified Information from owner Input Date 1994/01/01 284382 4837513 Pump Setterholm, D.R., project manager, 1995, Quaternary geology—Southwestern Minnesota: Geologic Interpretation Dale Setterholm Agency MGS Interpreted from cuttings ü Not Installed Date Installed Interpretation Method Minnesota Geological Survey Regional Hydrogeologic Assessment RHA-2, pt. A, 2 pls., Manufacture's name DEPTH ELEVATION LITHOLOGY scale 1:200,000. Model number HP 0.00 Volts Geological Material Color Hardness From To Thick From To Stratigraphy Primary Secondary Minor Length of drop pipe Material Capacity g.p.m TOPSOIL BLACK 0 2 2 1653 1651 Recent deposit-black soil organic deposits Type Abandoned Wells CLAY TILL SILTY TRACE SAND LT. BRN 2 12 10 1651 1641 till-brown till clay sand Remarks Does property have any not in use and not sealed well(s)? YES NO DNR OB WELL 53009. M.G.S. CUTTINGS NO.2765. CLAY SILTY TRACE SAND AND GRAVEL GRAY 12 55 43 1641 1598 pebbly sand/silt/clay-gray clay sand gravel Variance CLAY SILTY TRACE SAND & GRAVEL GRAY 55 90 35 1598 1563 pebbly sand/silt/clay-gray clay sand gravel Was a variance granted from the MDH for this well? YES NO GRAVEL 90 91 1 1563 1562 gravel (+larger) gravel Well Contractor Cerfication Ltp Enterprises 91353 CLAY TILL SILTY SANDY TR. GRAVEL GRAY 91 118 27 1562 1535 till-gray till clay silt License Business Name Lic. or Reg No. CLAY TILL SILTY SANDY TR. GRAVEL LT. BRN 118 129 11 1535 1524 till-brown till sand gravel First Bedrock Aquifer Quat. buried artes. aquifer WIEDERHOLT, D SAND MEDIUM TO COARSE, GRAVEL 129 135 6 1524 1518 sand +larger sand gravel Last Strat QWUB Depth to Bedrock ft. County Well Index v.5 REPORT Printed on 6/1/2018 Name of Driller Date HE-01205-07 (Rev. 2/99) CLAY SILTY SANDY LT. BRN 135 142 7 1518 1511 cly/snd/slt-no peb.-brn clay sand silt Figure 1. Example of a WELL LOG record, showing all the information about the well as reported by the well driller. Figure 2. Example of a WELL STRATIGRAPHY record, which contains a geologist's interpretation of the geologic materials listed by the driller in the WELL LOG record (Fig. 1). Additional downhole information for this well (as noted in the Interpretation Method on the record above) controls the geologist's interpretation, which may not match the driller's description of the geologic material penetrated.

Every reasonable effort has been made to ensure the accuracy of the factual data on which this map interpretation is based; however, the Minnesota Geological Survey does not warrant or guarantee that there are no errors. Users may wish to verify critical information; sources include both the references listed here and information on file at the offices of the Minnesota Geological Survey in St. Paul. In addition, effort has been made to ensure that the interpretation conforms to sound geologic and cartographic principles. ©2020 by the Regents of the University of Minnesota ENVIRONMENT No claim is made that the interpretation shown is rigorously correct, however, and it AND NATURAL RESOURCES should not be used to guide engineering-scale decisions without site-specific verification. The University of Minnesota is an equal opportunity educator and employer TRUST FUND GEOLOGIC ATLAS OF NOBLES COUNTY, MINNESOTA