HomeMy WebLinkAbout5-1 Groundwater 12-31-2019Groundwater
This section is a response to the requirements of the City of Bozeman Unified Development
Ordinance Section 38.220.060 relative to Groundwater.
Groundwater depth was monitored in the Bozeman Gateway on December 12, 2018. Monitoring
well locations and water elevations are illustrated on the Exhibit entitled “Water Table Map”,
included in this section. Groundwater depths vary in Phase 4 from seven to eleven feet below
ground surface.
As a supplement to the original water table, a hydrograph from nearby well IR 2 (GWIC Id:
231831) has been included in the Preliminary Plat resubmittal that has data from July 2017 to
January 2019. As IR 2 is situated in a depression and is near the farmers canal ditch, it is
expected that the ground water levels in this area will be higher than they will be in Phase 4.
Limitations posed by groundwater are common throughout the Bozeman area. Common
engineering and construction practices can successfully mitigate these limitations without
extreme or undo expense.
General impacts on the planning and design for the project will be to build the site up by
elevating roads slightly above existing ground to provide separation to the groundwater. The
high groundwater will require special consideration of building elevations and foundation design
for buildings.