Drilling holes in the ice using an ice auger
![Hydrologic Technician is drilling holes in the ice using an ice auger](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/IMG_0117_web.jpg?itok=pR4GSm1F)
Detailed Description
Hydrologic technician measured the streamflow of ice-covered rivers in Northern Maine as part of the North Index Trip. Certain gages are considered "Index" sites because they make for good references when comparing discharges of nearby streamgages, especially in frozen conditions.
Sources/Usage
Public Domain.