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ESPA_SP2023_GW_Contours_50
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Projected
GCS_North_American_1983
Linear Unit: Meter (1.000000)
NAD_1983_Transverse_Mercator
<ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS["NAD_1983_Transverse_Mercator",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",2500000.0],PARAMETER["False_Northing",1200000.0],PARAMETER["Central_Meridian",-114.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",42.0],UNIT["Meter",1.0]]</WKT><XOrigin>-3120900</XOrigin><YOrigin>-13447900</YOrigin><XYScale>10000</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision></ProjectedCoordinateSystem>
20250729
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20250729
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Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388
ESPA Spring 2023 GW Contours 50 ft interval
2025-07-08T00:00:00
2025-07-08T00:00:00
First
20250708
Water-level data were compiled from the mass water-level measurement event conducted in the spring of 2023.
external
b522197d5b5a574d2d7819b7ba7121e1
Geospatial Technology Section
Idaho Department of Water Resources
GIS
322 East Front Street
Boise
Idaho
83720
US
gisinfo@idwr.idaho.gov
(208) 287-4800
(208) 287-6700
8:00 AM - 5:00 PM
True
Geospatial Technology Section
1
-115.232134
-111.408077
44.442347
42.230480
This file contains contours that illustrate the groundwater elevation in the Eastern Snake Plain Aquifer (ESPA) in the spring of 2023. 84% of measurements were taken between 3/1/2023 and 4/15/2023. The contours are plotted on a 50-ft interval.
2023-03-01T00:00:00
2023-04-15T00:00:00
<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 14 0;"><SPAN>This file contains contours that illustrate the groundwater elevation in the Eastern Snake Plain Aquifer (ESPA) in the spring of 2023. 84% of measurements were taken between 3/1/2023 and 4/15/2023. The contour interval is 50 ft.</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
ESPA
groundwater
contours
spring 2023
50-ft contours illustrating the spring 2023 groundwater elevation in the ESPA.
Idaho Department of Water Resources
Water-level data were compiled from the mass water-level measurement event conducted in the spring of 2023.
external
b522197d5b5a574d2d7819b7ba7121e1
Geospatial Technology Section
Idaho Department of Water Resources
GIS
322 East Front Street
Boise
Idaho
83720
US
gisinfo@idwr.idaho.gov
(208) 287-4800
(208) 287-6700
8:00 AM - 5:00 PM
True
Geospatial Technology Section
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Idaho Department of Water Resources is making this data available as a public service. The Idaho Department of Water Resources strives to ensure that all technical data and other information made available to the public is accurate, complete and in conformance with the Idaho Public Records Act. </SPAN></P><P><SPAN>Neither the Department of Water Resources nor the State of Idaho, however, assumes any legal responsibility for the accuracy or completeness of the information contained on this site.</SPAN></P><P><SPAN>Persons using information from this site for official purposes, or other purposes, for which accuracy and completeness are required, are hereby notified that they should first verify the information with the public records or other primary sources from which the information was obtained.</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
The Idaho Department of Water Resources is making this data available as a public service. The Idaho Department of Water Resources strives to ensure that all technical data and other information made available to the public is accurate, complete and in conformance with the Idaho Public Records Act.
Neither the Department of Water Resources nor the State of Idaho, however, assumes any legal responsibility for the accuracy or completeness of the information contained on this site.
Persons using information from this site for official purposes, or other purposes, for which accuracy and completeness are required, are hereby notified that they should first verify the information with the public records or other primary sources from which the information was obtained.
Feature Class
ArcMap 10.8.2
0.129
dataset
0
Simple
FALSE
0
TRUE
FALSE
ESPA_SP2023_GW_Contours_50
Feature Class
0
Groundwater Contours
IDWR
OBJECTID
FID
OID
4
10
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
4
0
0
Feature geometry.
Esri
Coordinates defining the features.
Contour
Contour
Double
8
38
8
Groundwater contour elevation in feet
IDWR
20230301
20230415
Shape.STLength()
Shape.STLength()
Double
0
0
0
20250729
external
b522197d5b5a574d2d7819b7ba7121e1
Geospatial Technology Section
Idaho Department of Water Resources
GIS
322 East Front Street
Boise
Idaho
83720
US
gisinfo@idwr.idaho.gov
(208) 287-4800
(208) 287-6700
8:00 AM - 5:00 PM
True
Geospatial Technology Section
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Idaho Department of Water Resources is making this data available as a public service. The Idaho Department of Water Resources strives to ensure that all technical data and other information made available to the public is accurate, complete and in conformance with the Idaho Public Records Act. </SPAN></P><P><SPAN>Neither the Department of Water Resources nor the State of Idaho, however, assumes any legal responsibility for the accuracy or completeness of the information contained on this site.</SPAN></P><P><SPAN>Persons using information from this site for official purposes, or other purposes, for which accuracy and completeness are required, are hereby notified that they should first verify the information with the public records or other primary sources from which the information was obtained.</SPAN></P></DIV></DIV></DIV>
The Idaho Department of Water Resources is making this data available as a public service. The Idaho Department of Water Resources strives to ensure that all technical data and other information made available to the public is accurate, complete and in conformance with the Idaho Public Records Act.
Neither the Department of Water Resources nor the State of Idaho, however, assumes any legal responsibility for the accuracy or completeness of the information contained on this site.
Persons using information from this site for official purposes, or other purposes, for which accuracy and completeness are required, are hereby notified that they should first verify the information with the public records or other primary sources from which the information was obtained.
Water-level data were compiled from the mass water-level measurement event conducted in the spring of 2023.
Groundwater elevations were calculated by subtracting measured depth-to-water (in feet below ground surface) from ground surface elevation.
The groundwater elevations were interpolated across the ESPAM2.2 model area using the Geostatistical Analyst tools in ArcMap 10.8.2.
The interpolated groundwater elevation raster was generated using ordinary kriging.
50 ft interval groundwater elevation contours were generated from the raster using the ArcMap contour tool found in the Spatial Analyst tools.
Groundwater contours were smoothed using the Smooth Line tool with a tolerance of 2 miles.
Additional minor adjustments were manually performed in some areas to align with known and/or realistic groundwater flow conditions.
2025-07-08T00:00:00
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