Sewer Rebuild Near Coldwater Underground Spring Sources
The 2-year sewer re-do project is burrowing underground at the (closed) north end of Minnehaha Parkvery near some of the underground water veins that furnish water to Coldwater Springs.
Friends of Coldwater objected to the intrusive original plan to lay open the land 45 to 50 feet deep for easier access than delivering workers and reconstruction materials through 3-foot vertical manhole tunnels.
Oh, the bitterness of Metropolitan Council engineers with their efficient clear-cut mentality when 10,000-year-old Coldwater Springs took legal precedence over the quick, cheap modern wham-bam get-it-done-fast construction methods currently in practice.
Geo-hydrologist Kelton Barr believes Coldwater might have been flowing beneath the last glacier that buried most of Minnesota. That was the Wisconsin glaciation episode lasting from 75,000 to 11,000 years ago.
As the ice sheet grew southward it moved tons of glacial till over the land that forms our relatively flat, rich fertile chocolate soil and shoved every earthworm south to the glacial boundary.
Minnesota evolved without earthworms that chew up leaf litter faster than our native trees can absorb the nutrients. Earthworms are an invasive species introduced by fisher-people who dumped their bait on the ground.
In 2001, during the litigation between Minnehaha Creek Watershed District and MnDOT, the court established a basic Coldwater flow rate of 129,600 gallons per day. The January 30, 2020 measurement at the Spring House was 69,120 gallons per day. Now you know why Friends of Coldwater is so protective of this ancient water site.
Coldwater is the last natural spring of size in all of Hennepin County, an acknowledged Dakota sacred site, and was the birthplace of the state of Minnesota, the state named after water, “mni.”
(Here is the link to the National Park Service Coldwater Spring Discharge results. Scroll down to the Excel spreadsheet and convert the gallons per minute to gallons per day: click here »)