Water Wells - Southwest Michigan [Michigan]
EGLE · 2025 Full Details
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Full Details
- Title
- Water Wells - Southwest Michigan [Michigan]
- Description
- The data in these six files is derived from Wellogic, the EGLE statewide ground water database. The six files combined contain information on over 575,000 spatially verified water well records. The six files are intended to provide water well information for wells in counties clustered by geographic region: Upper Peninsula, Northern Lower Peninsula, East Central Lower Peninsula, West Central Lower Peninsula, Southwest Lower Peninsula and the South Central - Southeastern Lower Peninsula. The files are constructed to be easily merged, containing the same number and type of attribute fields. Although the derived data in these files represents the best readily available data, the six files do not represent a complete database of all wells or well records in existence. Beginning January 1, 2000 virtually 100% of new wells constructed are accounted for in Wellogic, however for wells older than 2000 the rate of inclusion varies from county to county, and may be considerably lower. Further, there is a quality control check on location that may exclude a limited number of wells from Wellogic from the six files made available on this site. The locational data also has varying degrees of accuracy; ranging from precise GPS point collection to address geocoding, but there may also be erroneous locations regardless of collection method that have not been corrected as of yet. Refer to the METHD_COLL field to determine each individual record's potential locational accuracy. Field codes described below. ------------------------------------------------------------------------------------------ Field Definitions: WELLID : Wellogic ID number (unique identifying number, first 2 digits represent county number) PERMIT_NUM : Well permit number as assigned by local health department WELL_TYPE : Type of well OTH = Other HEATP = Heat pump HOSHLD = Household INDUS = Industrial IRRI = Irrigation TESTW = Test well TY1PU = Type I public TY2PU = Type II public TY3PU = Type III public TYPE_OTHER : Type of well if WELL_TYPE is 'OTH' WEL_STATUS : Status of well OTH = Other ACT = Active INACT = Inactive PLU = Plugged/Abandoned STATUS_OTH : Status of well if WEL_STATUS is 'OTH' WSSN : Water Supply Serial Number, only if public well WELL_NUM : Individual well number/name, only if public well DRILLER_ID : Water Well Drilling Contractor Registration Number as assigned by State of Michigan DRILL_METH : Method used to drill the well borehole OTH = Other AUGBOR = Auger/Bored CABTOO = Cable Tool CASHAM = Casing Hammer DRIVEN = Driven Hand HOLROD = Hollow Rod JETTIN = Jetted METH_OTHER : Method used to drill if DRILL_METH is 'OTH' CASE_TYPE : Well casing type OTH = Other UNK = Unknown PVCPLA = PVC Plastic STEBLA = Steel-black STEGAL = Steel-Galvanized CASE_OTHER : Well casing type is CASE_TYPE is 'OTH' CASE_DIA : Well Casing Diameter (in inches) CASE_DEPTH : Depth of Casing (in feet) SCREEN_FRM : Depth of top of screen (in feet) SCREEN_TO : Depth of bottom of screen (in feet) SWL : Depth of Static Water Level (in feet) FLOWING : Naturally flowing well (Y or N) AQ_TYPE : Aquifer type DRIFT = Well draws water from the glacial drift ROCK = Well draws water from the bedrock DRYHOL = Dry hole, well did not produce water UNK = Unknown TEST_DEPTH : Depth of drawdown when the well was developed (in feet) TEST_HOURS : Duration of pumping when the well was developed (in hours) TEST_RATE : Rate of water flow when the well was developed (in Gallons per Minute) TEST_METHD : Method used to develop the well UNK = Unknown OTH = Other AIR = Air BAIL = Bailer PLUGR = Plunger TSTPUM = Test Pump TEST_OTHER : Method used to develop the well if TEST_METHD is 'OTH' GROUT : Whether the well was grouted or not PMP_CPCITY : Capacity of the pump installed in the well (in Gallons per minute) METHD_COLL : Method of collection of the latitude/longitude coordinates 001 = Address Matching-House Number 002 = Address Matching-Street Centerline 004 = Address Matching-Nearest Intersection 012 = GPS Carrier Phase Static Relative Position Tech. 013 = GPS Carrier Phase Kinematic Relative Position Tech. 014 = GPS Code Measurement Differential (DGPS) 015 = GPS Precise Positioning Service 016 = GPS Code Meas. Std. Positioning Service SA Off 017 = GPS Std. Positioning Service SA On 018 = Interpolation-Map 019 = Interpolation-Aerial Photo 020 = Interpolation-Satellite Photo 025 = Classical Surveying Techniques 027 = Section centroid 028 = TownRange centroid 036 = Quarter-Quarter-Quarter centroid ELEV_METHD : Method of collection of the elevation 003 = GPS Code Measurement Differential (DGPS) 005 = GPS Code Meas. Std. Positioning Svc. SA Off 007 = Classical Surveying Techniques 014 = Topographic Map Interpolation OTH = Other UNK = Unknown WITHIN_CO: Whether the well is within the stated county WITHIN_SEC: Whether the well is within the stated land survey section LOC_MATCH: Whether the well is within the stated Tier/Range SEC_DIST: Whether the well point is within 200 feet of the stated land survey section ELEV_DEM: Elevation in feet above mean sea level ELEV_DIF: Absolute difference, in feet, between ELEVATION and ELEV_DEM LANDSYS: The Land System Group polygon that the well falls within DEPTH_FLAG: 1: WELL_DEPTH = 0 2: WELL_DEPTH < 25ft or WELL_DEPTH > 1000ft ELEV_FLAG: 1: ELEVATION (Wellogic Field) =0 2: ELEVATION (Wellogic Field) < 507ft OR > 1980ft 3: ELEVATION (Wellogic Field) < DEM min OR > DEM max 4: ELEV_DIF > 20 ft SWL_FLAG: 1: SWL = 0 2: SWL >= WELL_DEPTH in a Bedrock well OR SWL >= SCREEN_BOT in a Glacial well 3: SWL > 900ft SPC_CPCITY: Specific Capacity = (TEST_RATE / TEST_DEPTH). Only calculated if TEST_METHD = BAIL, PLUGR or TSTPUM AQ_CODE: N: No Lithology Record associated with the well record B: Blank (AQTYPE = null) noted among the strata D: Drift (Glacial) Well R: Rock Well U: Unknown Lithology noted among the strata * PROCESSING NOTE - This evaluation reads the [AQTYPE] field for each stratum from the LITHOLOGY table, beginning at the top and looping down to each subjacent stratum. If the previous stratum = ‘R' AND the bottommost stratum = ‘R', then [AQ_CODE] is set to ‘R'. If the previous stratum = ‘R' AND the next stratum = ‘D', then [AQ_CODE] is set to ‘D' and [AQ_FLAG] is set to ‘L'. If aType = ‘R' AND screendepth > 0 R' AND screendepth <= welldepth , then [AQ_CODE] is set to ‘D' and [AQ_FLAG] is set to ‘S'. If aType = ‘R' AND welldepth <= topofrock, then [AQ_CODE] is set to ‘D' and [AQ_FLAG] is set to ‘D'. <o:p></o:p> ROCK_TOP: Depth below land surface in ft AQ_THK_1: Glacial Wells only; Summed thickness of all drift strata from SCREEN_BOT upward to: A) the bottom of a qualifying confining unit (>= 5ft CM or >= 10ft PCM) else B) the SWL (if SWL >0 and SWL < SCREEN_BOT and SWL <= 99 else C) the ground surface * PROCESSING NOTE - If [SCREEN_BOT] <= layerbottom for seqnum1 (the bottommost layer), AND seqnum1 = PCM OR seqnum1 = CM ( i.e ., the screen bottoms out in a PCM or CM unit), the analysis for a qualifying confining unit moves up to the next strata in order to prevent this circumstance from generating an [AQ_THK_1] = 0. The code performs a "layer-clip" function in the case where [SCREEN_BOT] is within a PCM or CM strata, but the [SCREEN_TOP] is in an AQ or MAQ strata, counting upward from layerbottom of bottommost AQ or MAQ strata in the screened interval, rather than counting upward from [SCREEN_BOT], which is the normal logic. <o:p></o:p> TOPAQ: Top of Aquifer BOTAQ: Bottom of Aquifer WWAT_ID: The number assigned to a well that is a large quantity withdrawal AQ_FLAG: U: Unknown lithologies (i.e., Hyd. Cond. = 999999, so no values are calculated for B_H_COND, B_V_COND, or B_TRANS) D: Depth Condition - WELL_DEPTH <= ROCK_TOP so AQ_CODE was set to "D" L: Lithology Problem (a Glacial stratum was encountered below a Rock stratum) S: Bottommost stratum is 'R' and SCREEN_TO > 0 and SCREEN_TO <= WELL_DEPTH, so AQ_CODE was set to 'D' (this traps for Glacial wells that were "over-bored" into the rock, but a screen was set in the glacial package) FOR GLACIAL WELLS ONLY AQ_THK_1: Glacial Wells only; Summed thickness of all drift strata (i.e., AQ, MAQ, PCM, and CM) from SCREEN_BOT upward to: A) the SWL (if SWL > 0 and SWL < SCREEN_BOT and SWL <= 900) else B) the ground surface H_COND_1: "Confined" equivalent horizontal hydraulic conductivity for sediments in a glacial well (uses AQ_THK_1) H_COND_2: "Unconfined" equivalent horizontal hydraulic conductivity for sediments in a glacial well (uses AQ_THK_2) V_COND_1: "Confined" equivalent vertical hydraulic conductivity for sediments in a glacial well (uses AQ_THK_1) V_COND_2: "Unconfined" equivalent vertical hydraulic conductivity for sediments in a glacial well (uses AQ_THK_2) TRANSMSV_1: "Confined" equivalent transmissivity for sediments in a glacial well (H_COND_1 * AQ_THK_1) TRANSMSV_2: "Unconfined" equivalent transmissivity for sediments in a glacial well (H_COND_2 * AQ_THK_2) FOR GLACIAL PORTION OF BEDROCK WELLS AQ_THK_D: The summed thickness of a drift aquifer from bedrock to ground surface H_COND_D: Equivalent horizontal hydraulic conductivity for glacial sediments in a bedrock well (uses AQ_THK_D) V_COND_D: Equivalent vertical hydraulic conductivity for glacial sediments in a bedrock well (uses AQ_THK_D) TRANS_D: Equivalent transmissivity for glacial sediments in a bedrock well (H_COND_D * AQ_THK_D) FOR BEDROCK PORTION OF BEDROCK WELLS B_AQ_THK: Summed thickness of all bedrock strata (i.e. AQ, MAQ, PCM, and CM) from WELL_DEPTH upward to ROCK_TOP B_H_COND: Equivalent horizontal hydraulic conductivity for Bedrock Units (uses B_AQ_THK) B_V_COND: Equivalent vertical hydraulic conductivity for Bedrock Units (uses B_AQ_THK) B_TRANS: Equivalent transmissivity for Bedrock Units (B_H_COND * B_AQ_THK) ------------------------------------------------------------------------------------------ NOTE: This data download does not contain the associated lithology files. Download this data on our Wellogic Water Wells by County website . If you have questions concerning this data, please contact: Wellogic@Michigan.gov
- Creator
- EGLE
- Temporal Coverage
- Last Modified: 2025-02-04
- Date Issued
- 2020-07-31
- Rights
- This application or dataset, along with any maps, data, content and other information contained within it and all output from the application (together the “Information”), is provided as a public service, and there are no restrictions on the use, reproduction, or distribution of the Information. It is your responsibility to use the Information for a legally permissible purpose. This Information is provided “AS IS” and on an “AS AVAILABLE” basis. The State of Michigan (“State”) makes no warranties, express or implied, regarding the accuracy, adequacy, reliability, timeliness, or completeness of this Information. THE STATE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS INFORMATION, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF PROPRIETARY RIGHTS. THE STATE WILL NOT BE LIABLE, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY OR BY STATUTE OR OTHERWISE, FOR ANY CLAIM FOR CONSEQUENTIAL, INCIDENTAL, INDIRECT, OR SPECIAL DAMAGES, INCLUDING WITHOUT LIMITATION LOST PROFITS AND LOST BUSINESS OPPORTUNITIES, RELATED TO THE ACCESS OR USE OF THIS INFORMATION. IN NO EVENT WILL THE STATE BE LIABLE FOR ANY AMOUNTS THAT MAY RESULT FROM THE ACCESS OR USE OF THIS INFORMATION, REGARDLESS OF THE FORM OF ACTION, WHETHER IN CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, OR BY STATUTE OR OTHERWISE. By accessing or using this Information, you agree that you will not make any claims against the State or any of its departments, divisions, officers, or employees related to your use of the Information. These terms are governed by and interpreted under the laws of the State of Michigan without regard to conflict of laws provisions. Nothing in these terms is meant to impact or replace any existing rights or licenses, such as copyright, trademark, or patent protections, in materials or content that may be located on the site or portal containing the Information.
- Access Rights
- Public
- Format
- ArcGIS DynamicMapLayer
- Language
- English
- Date Added
- August 10, 2025
- Provenance Statement
- The metadata for this resource was last retrieved from State of Michigan Open Data Portal on 2025-08-24.
Resource Class
Resource Type
Theme
Place
Local Collection
Cite and Reference
-
Citation
EGLE (2020). Water Wells - Southwest Michigan [Michigan]. . https://gis-michigan.opendata.arcgis.com/datasets/egle::water-wells-southwest-michigan (web service) -
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