Coldwater Spring Water Flow




2018

Date Springhouse GPM Wetland A GPM
January 01, 2018 44 18
January 08, 2018 56 18
January 15, 2018 45 17
January 22, 2018 44 17
January 29, 2018 45 17
February 05, 2018 44 17
February 12, 2018 43 17
February 19, 2018 45 17
February 26, 2018 45 17
March 01, 2018 45 17
March 08, 2018 44 17
March 16, 2018 42 15
March 23, 2018 45 16
March 30, 2018 46 18
April 06, 2018 44 18
April 13, 2018 45 17
April 20, 2018 43 18
April 27, 2018 46 15
May 04, 2018 45 16
May 11, 2018 47 16
May 17, 2018 45 15
May 24, 2018 49 14
May 31, 2018 50 15
June 6, 2018 46 15
June 13, 2018 46 14
June 20, 2018 48 16
June 27, 2018 41 14
July 4, 2018 42 15
July 10, 2018 47 13
July 17, 2018 45 11
July 24, 2018 41 10
July 30, 2018 46 10
*GPM = gallons per minute

2017

Date Springhouse GPM Wetland A GPM
January 06, 2017 50 20
January 13, 2017 49 21
January 20, 2017 48 20
January 27, 2017 49 20
February 03, 2017 48 20
February 10, 2017 46 20
February 17, 2017 47 20
February 23, 2017 46 20
March 03, 2017 49 18
March 10, 2017 48 19
March 17, 2017 46 19
March 24, 2017 46 19
March 31, 2017 45 18
April 07, 2017 45 18
April 14, 2017 45 19
April 21, 2017 46 19
May 01, 2017 51 22
May 05, 2017 50 19
May 12, 2017 52 19
May 19, 2017 45 20
June 02, 2017 53 19
June 09, 2017 53 18
June 16, 2017 49 19
June 23, 2017 52 18
June 30, 2017 47 18
July 07, 2017 49 18
July 14, 2017 45 18
July 21, 2017 46 20
July 28, 2017 47 19
August 04, 2017 47 18
August 11, 2017 45 17
August 18, 2017 46 20
August 25, 2017 47 17
September 01, 2017 44 16
September 08, 2017 45 18
September 15, 2017 48 19
September 22, 2017 43 19
September 29, 2017 48 17
October 06, 2017 48 18
October 13, 2017 50 18
October 20, 2017 46 19
October 27, 2017 50 20
November 03, 2017 44 19
November 09, 2017 43 18
November 13, 2017 44 18
December 04, 2017 43 18
December 06, 2017 48 18
December 11, 2017 42 18
December 18, 2017 46 19
December 25, 2017 48 17
*GPM = gallons per minute

2016

Date Springhouse GPM Wetland A GPM
January 08, 2016 42 7
January 15, 2016 44 13
January 22, 2016 43 11
January 29, 2016 41 15
February 04, 2016 42 12
February 16, 2016 43 10
February 19, 2016 44 15
February 26, 2016 45 14
March 04, 2016 44 12
March 11, 2016 44 12
March 18, 2016 46 11
March 25, 2016 48 11
April 01, 2016 46 11
April 08, 2016 48 9
April 15, 2016 45 8
April 22, 2016 50 10
May 09, 2016 46 8
May 13, 2016 51 12
May 20, 2016 49 9
May 27, 2016 49 13
June 03, 2016 49 15
June 10, 2016 46 12
June 16, 2016 47 13
June 24, 2016 49 11
July 01, 2016 48 10
July 08, 2016 43 10
July 15, 2016 42 9
July 22, 2016 50 11
July 26, 2016 47 11
August 05, 2016 44 11
August 12, 2016 49 11
*August 19, 2016 47 *21
August 26, 2016 49 19
September 02, 2016 44 18
September 09, 2016 46 22
September 16, 2016 51 21
September 23, 2016 48 23
September 30, 2016 48 22
October 07, 2016 46 23
October 14, 2016 44 22
October 21, 2016 48 22
October 28, 2016 49 22
November 04, 2016 45 20
November 10, 2016 47 21
November 18, 2016 47 22
November 28, 2016 46 32
December 02, 2016 45 21
December 09, 2016 47 20
December 16, 2016 46 20
December 23, 2016 47 22
December 30, 2016 46 20
*08/19/16: New stone installed in streambed channel of Wetland A.
*GPM = gallons per minute

2015

Date Springhouse GPM Wetland A GPM
January 2, 2015 47 11
January 9, 2015 47 11
January 16, 2015 47 12
January 23, 2015 47 14
January 30, 2015 47 14
February 6, 2015 46 11
February 13, 2015 47 12
February 20, 2015 46 12
February 27, 2015 48 11
March 6, 2015 45 15
March 13, 2015 45 17
March 20, 2015 46 16
April 3, 2015 48 13
April 10, 2015 47 14
April 17, 2015 450 13
April 24, 2015 43 10
May 1, 2015 46 14
May 8, 2015 45 10
May 15, 2015 48 12
May 22, 2015 46 10
May 29, 2015 49 9
June 5, 2015 50 8
June 12, 2015 46 9
June 19, 2015 55 9
June 26, 2015 53 9
July 2, 2015 54 9
July 10, 2015 48 10
July 17, 2015 45 10
July 24, 2015 44 10
July 31, 2015 48 12
August 7, 2015 49 8
August 28, 2015 45 9
September 4, 2015 47 9
September 11, 2015 43 12
September 18, 2015 45 15
September 25, 2015 43 13
October 9, 2015 42 12
October 16, 2015 46 11
October 23, 2015 40 17
October 30, 2015 40 13
November 06, 2015 40 14
November 13, 2015 41 14
November 20, 2015 43 12
December 01, 2015 40 9
December 04, 2015 40 11
December 11, 2015 43 10
December 18, 2015 42 6
December 23, 2015 42 6
December 30, 2015 42 6
*GPM = gallons per minute

.

2014

Date Springhouse GPM Wetland A GPM
January 9th, 2014 40 15
January 15th, 2014 41 16
January 23rd, 2014 43 15
January 31st, 2014 42 14
February 6th, 2014 42 15
February 13th, 2014 41 17
February 20th, 2014 42 17
February 28th, 2014 41 13
March 5th, 2014 42 15
March 12th, 2014 43 15
March 20th, 2014 43 19
March 28th, 2014 44 17
April 4th, 2014 44 18
April 11th, 2014 41 17
April 18th, 2014 44 15
May 2nd, 2014 45 n/a
May 9th, 2014 44 n/a
May 16th, 2014 45 17
May 23rd, 2014 44 17
May 28th, 2014 44 17
June 6th, 2014 48 14
June 13th, 2014 49 14
June 20th, 2014 49 17
June 27th, 2014 49 14
July 3rd, 2014 49 11
July 11th, 2014 51 12
July 18th, 2014 49 11
July 25th, 2014 48 11
August 1st, 2014 42 10
August 8th, 2014 41 10
August 15th, 2014 44 10
August 22th, 2014 46 8
August 29th, 2014 47 10
September 5th, 2014 47 11
September 12th, 2014 43 10
September 19th, 2014 47 12
September 26th, 2014 42 11
October 3rd, 2014 52 15
October 9th, 2014 45 13
October 17th, 2014 47 11
October 24th, 2014 46 14
October 31st, 2014 45 14
November 7th, 2014 48 17
November 14th, 2014 48 12
November 21st, 2014 46 12
November 28th, 2014 47 13
December 5th, 2014 48 23
December 12th, 2014 48 15
December 19th, 2014 47 13
*04/25/14-05/16/14: Monitoring of Wetland A waterflow was suspended due to the deterioration of the limestone rock from which it was collected.
*GPM = gallons per minute

2013

Date Springhouse GPM Wetland A GPM
January 2nd, 2013 41 19
January 7th, 2013 42 19
January 15th, 2013 41 19
January 23rd, 2013 41 18
January 29th, 2013 42 19
February 6th, 2013 41 18
February 12th, 2013 41 18
February 21st, 2013 38 15
February 26th, 2013 39 16
March 7th, 2013 38 17
March 12th, 2013 39 15
March 20th, 2013 40 15
March 26th, 2013 40 18
April 2nd, 2013 40 18
April 9th, 2013 36 19
April 16th, 2013 40 17
April 23rd, 2013 40 22
April 30th, 2013 40 18
May 7th, 2013 40 17
May 14th, 2013 40 17
May 20th, 2013 42 18
May 28th, 2013 42 18
June 6th, 2013 40 21
June 11th, 2013 42 18
June 19th, 2013 43 15
June 25th, 2013 43 19
July 2nd, 2013 35 17
July 10th, 2013 44 20
July 16th, 2013 47 21
July 24th, 2013 42 20
July 30th, 2013 41 20
August 8th, 2013 41 20
August 16th, 2013 44 16
August 23th, 2013 46 16
August 30th, 2013 44 16
September 6th, 2013 42 17
September 17th, 2013 44 19
September 26th, 2013 44 17
October 9th, 2013 41 18
October 17th, 2013 40 19
October 21st, 2013 40 19
October 28th, 2013 40 19
November 8th, 2013 45 18
November 13th, 2013 40 21
November 20th, 2013 42 15
November 21st, 2013 42 17
November 22nd, 2013 39 16
November 23rd, 2013 40 13
November 25th, 2013 43 16
November 26th, 2013 40 17
November 27th, 2013 42 20
November 29th, 2013 41 19
December 2nd, 2013 42 19
December 3rd, 2013 39 19
December 4th, 2013 40 20
December 5th, 2013 40 18
December 6th, 2013 40 17
December 11th, 2013 40
December 13th, 2013 16
December 18th, 2013 42 18
December 24th, 2013 42 16
December 31st, 2013 42 17
*11/20/2013 - 12/06/2013 - Took flow measurements Monday-Saturday due to CenterPoint Energy gas pipeline relocation.
*GPM = gallons per minute

WHY

The NPS monitors the water flow at Coldwater Spring. This provides a baseline of the water flow rate and allows for observations of changes in it. The spring and reservoir are contributing elements to the Fort Snelling National Historic Landmark, and any changes to the flow of the spring represent potential impacts to this landmark.

HOW

The water is collected using the "Bucket Fill" method which uses a bucket and stopwatch. The bucket is placed into the water flow and the time it takes to completely fill the bucket is recorded. This process is repeated 3 times and the results are then averaged.

The NPS explored different water collection techniques, and this method provided the best results. See the analysis here.

WHERE

The water flow is collected at two locations. The first is from a pipe that exits the southwest corner of the springhouse. The second is off a limestone rock in which the wetland south of the springhouse and reservoir drains.