HomeMy WebLinkAbout250389_GW_Monitoring_Memo_2026MEMORANDUM PAGE 1 OF 4 June 2026
August 12, 2026
Project No. 250389.02
GROUNDWATER MONITORING MEMO
Haggerty Lane
BOZEMAN, MONTANA
OVERVIEW NARRATIVE
Sanbell conducted a groundwater monitoring analysis on the south side of Haggerty Lane in Bozeman, Montana.
See Appendix A for a detailed layout of the project site location. Four monitoring wells were installed across
the site to determine the peak groundwater depth from the season. The purpose of this groundwater
monitoring analysis was to determine the peak depth of groundwater to provide support in the design and
construction phases of a new development. The groundwater elevations were measured using a Dipper-T water
level meter within semi-permeable PVC pipes inserted into the ground. The groundwater monitoring analysis
for well one was conducted from March 25, 2026, to August 5, 2026, for well two and three from April 22,
2026, to August 5, 2026, and for well four from April 29, 2026, to August 5, 2026. Shown below is a table and
graph of the manual measurements recorded relative to the ground surface.
MEMORANDUM PAGE 2 OF 4 June 2026
DISCUSSION OF RESULTS
Groundwater was present in all wells monitored throughout the study. The peak groundwater elevation varied
with each well’s different location. The peak groundwater for all four wells on this site was 4.12 ft below the
surface on July 8, 2026. All wells have been decreasing since the first week of June, but groundwater did come
back up to peak again around the first week of July. This second peak is mostly likely due to the high rainfall
events which occurred in that time period.
4
5
6
7
8
9
10Depth (ft)Date
Groundwater Depth
WELL #1
WELL #2
WELL #3
WELL #4
MEMORANDUM PAGE 3 OF 4 June 2026
APPENDIX A
Exhibit A: Groundwater Monitoring Project Site Location
MEMORANDUM PAGE 4 OF 4 June 2026
Exhibit B: Groundwater Monitoring Well Locations at Project site