Note to those planning to use MapShed in support of PaDEP-required Pollutant Reduction Plans:

The latest versions of MapShed and the GWLF-E model that can be used to estimate loads for urban/MS4 areas for the purpose of developing Pollutant Reduction Plans (PRPs) are now available for download on this website. Please check this site periodically for any future updates regarding these software tools. If you are having trouble running this version of MapShed for analyses related to urban or MS4 areas, please contact Dr. Barry Evans at for technical assistance.

  If you have any questions about MapShed, please contact one of the following individuals:

For general distribution, use questions, or technical support issues contact contact:

Dr. Barry M. Evans

For program installation questions or errors, or technical support issues contact:

Kenneth J. Corradini

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