Best Management Practices
Funds from the state-mandated Stormwater Remediation Fee for Baltimore County are used to identify and implement a number of best management practices (BMPs) to improve water quality. These practices are designed to:
- reduce the effects of urban and suburban stormwater runoff
- interrupt the direct connection between impervious surfaces and streams
- stabilize streams and waterways to minimize erosion
- reduce sediment and nutrient pollution entering the Chesapeake Bay
The Department of Environmental Protection and Sustainability oversees a number of restoration initiatives throughout Baltimore County, including:
- Stormwater management facility inspection and maintenance
- Stream restoration
- Stormwater retrofitting
- Shoreline protection and enhancement
- Stormwater inlet cleaning
- Street sweeping
There are more than 2,900 stormwater management facilities in Baltimore County. Public facilities are maintained by Baltimore County field crews. Private facilities are constructed and maintained by the owners, while County inspectors enforce maintenance regulations.
Redhouse Run at St. Patrick Road
Completed in 2011, this project stabilized 2,000 linear feet of degraded stream that was jeopardizing sewer and roadway infrastructure. Annually, this initiative removes 400 pounds of nitrogen, 126 pounds of phosphorous and 620,000 pounds of suspended solids.
Redhouse Run stream restoration before (left) and after (right).
Gwynns Falls at Chartley
Completed in 2008, this project replaced 2,000 linear feet of failing concrete channel using natural stream restoration design techniques. Annually, this initiative removes 400 pounds of nitrogen, 136 pounds of phosphorous and 620,000 pounds of suspended solids.
Gwynns Falls stream restoration before (left) and after (right).
Evergreen Stormwater Pond
Completed in 2011, this project converted a dry pond to an extended detention pond and wetland planting. Annually, the facility removes 39 pounds of nitrogen, 8 pounds of phosphorous and 4,331 pounds of suspended solids.
The Fields at Renaissance Park
Completed in 2007, this stormwater management pond and community park removes 177 pounds of nitrogen, 37 pounds of phosphorous and 22,437 pounds of suspended solids.
Utilization of hard and soft engineering techniques reduces erosion and improves ecological function along the County's tidal shorelines and waterways.
On average, County-wide storm drain cleaning is responsible for removing 1,588 cubic yards of debris each year.
Trash and debris traveling into storm drains is a major contributor to stormwater pollution entering into the watershed. Traditional street sweeping efforts are quite effective in collecting the trash before it reaches the storm drains.
Revised August 3, 2015