Aug. 7, 2026
The Mni Wiconi South Core Pipeline will be temporarily shut down on Tuesday (August 11, 2026) to complete emergency repairs.
This repair will affect all communities and rural areas between Fort Pierre and Vivian, as well as areas north and south of the Interstate 90 corridor between Oacoma and Kadoka.
During the shutdown, the water system will rely on reservoir storage to meet demand. To help ensure an adequate water supply throughout the repair, West River/Lyman Jones Rural Water asks all members and community residents to conserve water on Tuesday by postponing outdoor watering, filling chemical sprayers and other non-essential water use.
All Mni Wiconi and West River/Lyman Jones customers in the affected area are asked to please keep water conservation in mind and use water wisely while the repairs are being made on Tuesday. Your cooperation will help maintain reliable service while repairs are completed.
July 21, 2026:
Because of ongoing severe drought conditions and to ensure an adequate water supply is available for essential domestic and livestock use, the West River/Lyman-Jones Rural Water System has implemented mandatory outdoor watering restrictions for all of its customers.
These restrictions– which include the town of Fort Pierre– are effective immediately (July 21, 2026) and will remain in effect through September 30, 2026.
Outdoor watering of lawns, trees, gardens and landscaped areas is permitted only under the following schedule:
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watering hours– 8 p.m. to 8 a.m.
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even-numbered physical addresses– water only on even-numbered days of the month.
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odd-numbered physical addresses– water only on odd-numbered days of the month.
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no outdoor watering is permitted on the 31st day of any month.
Exceptions to the mandatory outdoor water conservation restrictions include:
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manual watering using a handheld hose, bucket, watering can or similar container.
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water use for domestic household needs.
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water use for livestock.
WR/LJ is operating at maximum capacity and appreciates their customers’ cooperation in conserving water and using the available supply as efficiently as possible. The company will continue to monitor weather conditions and system demands. If drought conditions persist or worsen, additional water conservation measures, including stricter outdoor water restrictions, may be implemented.
For updates, check or call the:
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West River/Lyman Jones office in Murdo at 605-669-2931
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Fort Pierre City Office at 605-223-7690
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