Laserfiche WebLink
Morton Lakes Substitute Water Supply Plan Renewal (Amended) <br /> July 21, 2025 <br /> Page 4 of 17 <br /> reservoir construction (soil compaction), and slurry wall repair. <br /> • Stage 6A - Mining at Stage 6A was completed mid-2017. The exposed groundwater <br /> surface area of Stage 6A is 1 acre and is lined. A 90-day leak test for this stage <br /> together with Stage 6B and 6D was provisionally approved on November 4, 2019. <br /> Depletions from this stage consist of evaporation only. <br /> • Stage 6B - Mining at Stage 6B was completed in March of 2018. The exposed <br /> groundwater surface area of Stage 6B will remain at 1 acre during 2025 and is lined. <br /> Depletions from this stage consist of evaporation only. <br /> • Stage 6C - Mining at Stage 6C began in 2019. Stage 6C was backfilled at the end of <br /> 2022. <br /> • Stage 6D - Mining at Stage 6D began in 2019 following the installation of the slurry <br /> wall. The exposed groundwater surface area of Stage 6D will increase from 1 .5 to 2 <br /> acres during 2025 and is lined. Depletions from this stage will consist of evaporation, <br /> dewatering, and gravel production. <br /> • Stage 6E - Mining is not anticipated to occur in Stage 6E during 2025, and no surface <br /> area is anticipated to be exposed during that time. <br /> • Stage 7A - Mining at Stage 7A began in 2023, following the planned completion of a <br /> slurry wall in Stage 7A. A 90-day leak test for this stage was provisionally approved on <br /> October 17, 2023. The exposed groundwater surface area of Stage 7A is currently 0.1 <br /> acres and is not expected to expose more than 1 acre. Depletions from this stage will <br /> consist of evaporation, dewatering, and gravel production. Mining from Stage 7A has <br /> not been completed as anticipated and is projected to continue through the end of <br /> 2025. <br /> • Stage 7B - Mining at Stage 7B began in 2023, and is planned to continue during the <br /> renewal request period. A 90-day leak test for this stage was provisionally approved <br /> on January 9, 2024. Stage 7B currently exposes 0.1 acres of ground water. The surface <br /> area exposed during 2025 is not anticipated to be more than 1 acre. Depletions from <br /> this stage will consist of evaporation, dewatering, and gravel production. Mining from <br /> Stage 7B has not been completed as anticipated and is projected to continue through <br />