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HomeMy WebLinkAbout023 - Appendix O - Groundwater Data 2025 memo TO: City of Bozeman Engineering Department FROM: Morrison-Maierle DATE: November 26, 2025 JOB NO.: 10130.001.04 RE: Laurel Meadows – Groundwater Monitoring Data CC: MMI File Urgent For Review Please Comment Please Reply For Your Use Summary: The following document is intended to present and summarize groundwater data collected at the Laurel Meadows site by method of seven monitoring wells placed around the site. Data was collected in 2021 between the months of March and December; in 2022 between the months of January and March; and in 2025 between the months of April and August. Any data collected at the time of site dewatering was excluded from analysis. The data collected in Monitor Well 6 has been excluded entirely due to site dewatering and irregular data. Generally, high groundwater was observed in the spring between March and June, and low groundwater was observed between July and September. The location of each monitoring well can be seen in Appendix A. Appendix B includes a graph of the data collected in each monitoring well (not including Well 6) for 2021, 2022, and 2025. © 2022 Microsoft Corporation © 2022 Maxar ©CNES (2022) Distribution Airbus DS © 2022 TomTom 4780.26 4787.34 4783.98 4785.78 4790.53 4793.07 4792.68 4785 4790 47 9 5 4785 4790 4795 4800 TRACT 1 11.85 acs. TRACT 2 6.79 acs. TRACT 3 12.30 acs. TRACT 4 10.04 acs. © PROJECT NO. FIGURE NUMBER COPYRIGHT MORRISON-MAIERLE,2022 N:\10130\001.02 Site Plan\ACAD\Civil\Worksheet\groundwater\10130.002 Groundwater Exhibit.dwg Plotted by rosie nickelson on Apr/11/2022 DRAWN BY: DSGN. BY: APPR. BY: DATE:engineers surveyors planners scientists MorrisonMaierle 2880 Technology Blvd West Bozeman, MT 59718 406.587.0721 www.m-m.net 10130.001 EX-B WEST PARK SUBDIVISION GROUNDWATER MONITORING WELL MAP BOZEMAN MONTANA BTB BTB JRN 4/1/2022 100 2000 SCALE IN FEET GROUNDWATER MON. WELL #5 (TH-4) GROUNDWATER MON. WELL #6 (TH-1) GROUNDWATER MON. WELL #4 (TH-16) GROUNDWATER MON. WELL #3 (TH-18) GROUNDWATER MON. WELL #2 (TH-14) GROUNDWATER MON. WELL #7 (TH-8)GROUNDWATER MON. WELL #1 (TH-11) GROUNDWATER ELEVATION FROM MARCH. 2, 2022 (TYP) EXISTING GROUND (TYP) EXISTING DETETION POND #4, NORTON PHASE 1 WETLANDS (TYP) Appendix B Figure 1: The overall high for Well 1 was observed on March 2, 2022, and measured at 0.48 feet below ground surface. The low was measured at 2.51 feet on September 29, 2021. Figure 2: The overall high for Well 2 was observed on March 2, 2022, and measured at 0.06 feet below ground surface. The low was measured at 1.69 feet on September 29, 2021. 0.00 0.50 1.00 1.50 2.00 2.50 3.00 11/4 12/24 2/12 4/3 5/23 7/12 8/31 10/20 12/9 1/28 DepthDate WELL 1 2025 2022 2021 0.00 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 11/4 12/24 2/12 4/3 5/23 7/12 8/31 10/20 12/9 1/28 DepthDate WELL 2 2025 2022 2021 Figure 3: The overall high for Well 3 was observed on March 2, 2022, and measured at 2.51 feet below ground surface. The low was measured at 4.03 feet on August 7, 2025. Figure 4: The overall high for Well 4 was observed on May 5, 2025, and measured at 0.22 feet below ground surface. The low was measured at 2.44 feet on August 3, 2021. 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00 4.50 11/4 12/24 2/12 4/3 5/23 7/12 8/31 10/20 12/9 1/28 DepthDate WELL 3 2025 2022 2021 0.00 0.50 1.00 1.50 2.00 2.50 3.00 11/4 12/24 2/12 4/3 5/23 7/12 8/31 10/20 12/9 1/28 DepthDate WELL 4 2025 2022 2021 Figure 5: The overall high for Well 5 was observed on May 5, 2025, and measured at 0.05 feet below ground surface. The low was measured at 2.30 on August 7, 2025. Figure 7: The overall high for Well 7 was observed on March 2, 2022, and measured at 0.39 feet below ground surface. The low was measured at 2.89 on September 29, 2021. 0.00 0.50 1.00 1.50 2.00 2.50 11/4 12/24 2/12 4/3 5/23 7/12 8/31 10/20 12/9 1/28 DepthDate WELL 5 2025 2022 2021 0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 11/4 12/24 2/12 4/3 5/23 7/12 8/31 10/20 12/9 1/28 DepthDate WELL 7 2025 2022 2021