GWMN RFP_Well Information.xlsx

This is a comprehensive Excel spreadsheet of the USGS Ground Water Monitoring Network (GWMN) Well Inventory Status, compiled by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). The document contains detailed geospatial and hydrogeological data for 292 monitoring wells across multiple Michigan counties, including Branch, Calhoun, Clinton, Eaton, Ingham, and many others. Each well entry includes specific geographic coordinates (latitude/longitude), horizontal datum, national and local aquifer classifications, well depth, and current status (primarily listed as "Located Inactive" or "Unlocated Inactive").

The wells represent diverse geological formations, including sand and gravel aquifers in glaciated regions, Silurian-Devonian aquifers, Cambrian-Ordovician aquifer systems, and Pennsylvanian aquifers. The data captures technical details such as specific aquifer types (e.g., Marshall Formation, Saginaw Formation, Glacial Deposits), precise geographic locations using township and range coordinates, and well depths ranging from as shallow as 5 feet to as deep as 530 feet. The dataset appears to be a comprehensive environmental monitoring resource that provides critical hydrogeological information for understanding groundwater systems across Michigan, potentially supporting research, environmental management, and water resource planning.