Revision History for SIM 3373

Virginia L. McGuire

Water-level changes in the High Plains aquifer, Republican River Basin in Colorado, Kansas, and Nebraska, 2002 to 2015

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Posted online December 29, 2016

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Revised and reposted February 13, 2017, version 1.1

1. Pamphlet was added to accompany SIM 3373.
2. Text was removed from SIM 3373 and added to pamphlet, so SIM 3373 now just has the page-size map.
3. Suggested citation was changed on SIM 3373 to acknowledge pamphlet.

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Revised and reposted March 27, 2017, version 1.2

1. Boundary line added around 6 wells in Rock Creek Augmentation area.
2. Symbols for those 6 wells changed.
3. Explanation added to reflect addition of boundary line and to define new symbols for wells.

Note from the author: The map of water-level changes, 2002-15, was changed to identify an area located in Dundy County, Nebraska, 
with non-irrigation pumping through January 2015 for the Rock Creek Augmentation project. Generally the water-level values used in the 
map of water-level changes, 2002-15 are within 1 to 2 feet of the most recovered water-level value in each well prior to the start of 
irrigation season in 2002 and 2015; this most recovered water-level is referred to in the report as the "static water level." 
However, in this area in Dundy County, after taking into consideration the pumping schedule for the Rock Creek Augmentation project that 
included pumping the project wells starting in 2013 through January 2015 and cession of this pumping from February 2015 through March 2016, 
the 2015 water levels were examined to asses the likely water level in these wells had the water level fully recovered from the non-irrigation 
pumping through January 2015. The water level in these wells measured in March 2016 were used to estimate the fully recovered or static water 
level in 2015 and well symbol on the map was changed to reflect the difference between the actual 2015 water-level value and the estimated 2015
static water level.