February 1, 2013

Drought Preparations

Raccoon River droughtWith continued concerns about drought and a desire to ensure mechanisms are in place with the State of Iowa and the U.S. Army Corps of Engineers at Saylorville, Des Moines Water Works (DMWW) requested the release of water from Saylorville on January 16.  For six hours, from 9:00 a.m. to 3:00 p.m., about 5 million gallons of water was released at a rate of 30 cubic feet per second (cfs = 7.5 fluid gallons).  To prepare for possible drought conditions again this summer, DMWW wanted to ensure that a future release could occur in a timely fashion.

In 1982, DMWW signed agreements with the State of Iowa and the United States of America in regards to water storage space in Saylorville Reservoir.  DMWW paid $2.4 million for the storage rights, and we continue to pay $100,000 per year for maintaining a pumping facility.

“Des Moines Water Works has never exercised the process of releasing our water supply at Saylorville Reservoir,” said Bill Stowe, Des Moines Water Works CEO and General Manager. “But given last year’s drought conditions, including poor water quality while in short supply, it is in our best interest to test the procedures to protect all our water resources for our ratepayers.”

The State of Iowa has the right to request the release of 18.86% of the volume of water in Saylorville when levels are between 812-836-feet. Two-thirds of that volume would be for DMWW purposes and the other one-third for Alliant Energy in Ottumwa.

There are two components to water release from Saylorville Reservoir:

  1. Water quality release – this release ensures that there is enough water to support the wildlife habitat in and along the river.
  2. Water supply release – the potential additional water release for Des Moines Water Works and Alliant Energy. Saylorville has a specific release plan in place for varying water levels.

The water released from Saylorville Reservoir directly benefits both the Fleur Drive and Saylorville Treatment Plants. DMWW can also release water from Maffitt Reservoir to benefit the L.D. McMullen Treatment Plant as needed, too.

Other proactive measures are already in place in the event of continued drought conditions. DMWW has acquired permits to dredge parts of the Des Moines River if the channel is not bringing enough water to our intake at Prospect Park. We also have a permit to dredge part of the Raccoon River to impact the channel by the flooding station to keep the recharge ponds and Gallery maximized.

Des Moines Water Works plans to meet all of our customer needs by these increasing available supplies of water, but if the drought continues, asking the public to conserve water, particularly in regards to lawn irrigation, may once again be requested.

Posted by: Mike McCurnin No Comments
Labels: , , , Posted in Conservation, Customer Service, Maffitt Reservoir, Saylorville Water Treatment Plant, Water Treatment

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