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Lower Gunpowder Falls

This is a map showing the location of the Lower Gunpowder watershed.

The Lower Gunpowder Falls Watershed is located in the central eastern portion of the County. The Lower Gunpowder begins at the Loch Raven Reservoir Dam and flows generally eastward where it meets the tidal portions of Gunpowder River. Major tributaries in the watershed include Minebank Run, Long Green Creek, Sweathouse Run, Haystack Branch, Jennifer Branch and Bean Run.

The main stem of the Lower Gunpowder Falls forms a unique geographic divide in this watershed with very rural countryside to the north and a highly urbanized area on the southern side. The land to the north is primarily agricultural in nature and includes the communities of Long Green, Hydes, Glen Arm, Fork, Kingsville and Upper Falls. Land south of the river consists of developed areas such as parts of Towson, Carney, Parkville, Perry Hall and the commercial corridor along Joppa Road. The valley forming the Lower Gunpowder Falls main stem consists of heavily forested lands that are part of the Gunpowder Falls State Park. The park, Maryland’s largest, is a popular destination for fishing, birding, picnicking, hiking, mountain biking and horseback riding.

The Lower Gunpowder Falls watershed is also home to Cromwell Valley Park. Located in the Minebank Run stream valley, this 367-acre Baltimore County park includes pasture, open fields, forests, hedgerows, cultivated fields and floodplain. These mixed habitats make it an excellent area for diverse wildlife. The Department of Recreation and Parks hosts events and educational programs year-round for children and adults with a focus on farming, history and natural history. A portion of the park is a demonstration farm, illustrating animal husbandry and sustainable and organic farming. The farm also operates a Community Supported Agriculture (CSA) farm program. The County completed a major stream restoration project along Minebank Run through Cromwell Valley alongside three miles of stream.

Previous Watershed Studies

The Lower Gunpowder Falls Water Quality Management Study was completed in September 1999. The plan identifies non-point source stormwater pollution, management measures and a restoration framework for Baltimore County's Department of Environmental Protection and Sustainability's watershed restoration program. View the executive summary (PDF).

The Lower Gunpowder Falls Watershed Assessment was completed in June 2011, to provide the county with assessments of potential sites for stream restoration projects.

Stream restorations, such as the previously referenced project on Minebank Run in Cromwell Valley Park, use state-of-the-art techniques to reduce sediment, nutrients and other pollution in the County's streams and waterways.

Small Watershed Action Plan

Public Small Watershed Action Plan (SWAP) meetings include presentations by County employees and consulting experts, and discussion and input from meeting attendees on the community’s priorities for restoration goals. Presentations provided general information about SWAPs, an overview of the SWAP area from a geographic perspective, and a brief overview of the project status to date.

A SWAP was completed for the Lower Gunpowder Falls watersheds. Volume 1 outlines the actions identified as part of the strategy and Volume 2 contains the results of the field and geographic information systems data assessments.




To participate as a volunteer for the Lower Gunpowder Falls watershed, contact the Gunpowder Valley Conservancy (GVC). GVC is the lead agency for the Clear Creeks Project, a citizen-based initiative to restore water quality in the rivers and creeks in focused areas of the greater Gunpowder River basin.

Contact Information

Watershed Management Program
Phone: 410-887-5683
Fax: 410-887-4804

Revised August 4, 2022         


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