Geotechnical Design Assessment

Glade Reservoir GDA Work Begins in June 2022

Beginning in June 2022, crews will be conducting rock and soil assessments at the proposed Glade Reservoir dam site, located north of the U.S. Highway 287 and State Highway 14 intersection. These are strictly assessments for design purposes; construction of the reservoir is NOT in progress. This work is expected to take about six months. 

The Northern Integrated Supply Project wants to be a good neighbor during this process through maintaining communications with local residents, in addition to implementing various measures and tools, such as noise-monitoring equipment and other devices, to closely evaluate and mitigate impacts.  

The goal of the work, referred to as the Glade Reservoir Geotechnical Design Assessment (GDA), is to gain site-specific geotechnical and geologic information that will inform design and construction planning for the proposed Glade Reservoir dam and appurtenant facilities. These assessments will take place from June to November, with the primary work elements including:  

  • Digging a 1,000-foot-long trench at the main dam for material testing and foundation drilling 
  • Constructing a test pad of embankment material types 
  • Producing aggregates and rock fill from the quarries and investigating material characteristics 

Work will be done by the NISP construction manager/general contractor, design team and subcontractors, and will take place only on land owned by Northern Water. 

Learn More

To learn more about the project, stay tuned to this webpage for any updates or follow our associated @NISPwater accounts on Facebook and Twitter, where we will be posting updates on the GDA work as it gets underway. We also have a quarterly NISP e-newsletter you can sign up for by using the green button at the bottom of this page. Additionally, email us at

Geotechnical Design Assessment Informational Flyer