Hydrology Branch

The Hydrology Branch is responsible for performing technical reviews of hydrogeological and geochemical studies and predictive models for Designated Mining Facilities (e.g. underground workings, pit lakes, tailings, etc.) to support permitting efforts for all branches of BMRR. This includes Groundwater Models, Pit Lake Studies, and Innundation Studies of Underground Workings.

Groundwater Models, Pit Lake Studies, and Inundation Studies utilize a combination of physical data and mathematical modeling to help predict the behavior of water, both in the present and in the future. These studies generally begin before mining and help regulators and industry partners understand how physical changes to a site, such a pit or underground working, will interact with water in the area. These are updated throughout the life of a mine, further refining accuracy and allowing for early detection and intervention into any areas of potential degradation. Mathematical models of this variety are essential tools to assist in safeguarding waters of the State. 

Geochemical studies, such as geochemical characterization, chemical fate and transport models, and attenuation studies are also a combination of physical characteristics and mathematical modeling. They assist regulators to understand the chemistry of the water, rock, and soil in a given area, and predict how physical changes will affect these characteristics. This is especially helpful in Nevada, where naturally occurring arsenic levels can sometimes be pushed into groundwater by disturbing rock and soil layers. 

Due to the technical nature of reviews performed by the Hydrology Branch, it is recommended to submit studies to the Hydrology Branch at least 180 days prior to any permitting action. A list of pending Hydrology Branch reviews can be found by clicking on Pending Hydrology Branch Reviews.