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MODFLOW-NWT simulations of regional groundwater flow under mining and pre-mining scenarios near the Mesabi Iron Range within the St. Louis River Basin, northeastern Minnesota

Metadata Updated: October 28, 2023

The U.S. Geological Survey developed two steady-state finite-difference regional groundwater-flow models using the MODFLOW-NWT computer code. These models simulate flow in the area of historical iron mining on and around the portion of the Mesabi Iron Range that is in the St. Louis River basin in northeastern Minnesota. The models are composed of 8 layers each; the upper four representing unconsolidated glacial sediments and the lower 4 representing bedrock. Horizontal boundary flows for these models are the results of a 2-dimensional analytic element groundwater-flow model of the entire St. Louis River Basin documented here: and available here: This archive contains two simulations. The mining model simulates groundwater flow under current iron-mining land use, being calibrated to average hydrologic conditions during calendar years 1995-2015. The premining simulation is identical to the mining simulation except that all iron-mining features are removed. It represents a scenario where modern conditions exist but iron mining does not. The models were used to explore the effects of modern iron mining on hydrology in the St. Louis River basin. This USGS data release contains all of the input and output files for the simulations described in the associated model documentation report (

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:638929ebd34ed907bf78ea43
Data Last Modified 20230130
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id b5cc9597-0441-40eb-908b-a6d0fb83f237
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -93.2036,47.1547,-91.6892,47.8136
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 218a99e770f050318bfa1631d46fe6652e95c1d396127564b215084323758a03
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -93.2036, 47.1547, -93.2036, 47.8136, -91.6892, 47.8136, -91.6892, 47.1547, -93.2036, 47.1547}

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