Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Scientist conducting measurement through hole drilled in ice covered surface of the Minnesota River in western Minnesota.
Public Domain.
Two scientists stand on the frozen Minnesota River covered in snow conducting fieldwork in western Minnesota.
Two scientists stand on the frozen Minnesota River covered in snow conducting fieldwork in western Minnesota.
Field office chief Dan Daly smiles for the camera with frost-covered eyelashes while conducting fieldwork on a frigid winter day in Minnesota.
Field office chief Dan Daly smiles for the camera with frost-covered eyelashes while conducting fieldwork on a frigid winter day in Minnesota.
Field office chief Dan Daly takes a streamflow measurement through a hole drilled in the frozen Minnesota River in western Minnesota.
Field office chief Dan Daly takes a streamflow measurement through a hole drilled in the frozen Minnesota River in western Minnesota.
Field office chief Dan Daly and a student hydrologist pull a sled containing water sampling equipment on the frozen Minnesota River in western Minnesota.
Field office chief Dan Daly and a student hydrologist pull a sled containing water sampling equipment on the frozen Minnesota River in western Minnesota.
Two scientists stand on the frozen Minnesota River covered in snow conducting fieldwork in western Minnesota.
Two scientists stand on the frozen Minnesota River covered in snow conducting fieldwork in western Minnesota.
Field office chief Dan Daly smiles for the camera with frost-covered eyelashes while conducting fieldwork on a frigid winter day in Minnesota.
Field office chief Dan Daly smiles for the camera with frost-covered eyelashes while conducting fieldwork on a frigid winter day in Minnesota.
Field office chief Dan Daly takes a streamflow measurement through a hole drilled in the frozen Minnesota River in western Minnesota.
Field office chief Dan Daly takes a streamflow measurement through a hole drilled in the frozen Minnesota River in western Minnesota.
Field office chief Dan Daly and a student hydrologist pull a sled containing water sampling equipment on the frozen Minnesota River in western Minnesota.
Field office chief Dan Daly and a student hydrologist pull a sled containing water sampling equipment on the frozen Minnesota River in western Minnesota.
