The shop will be closed tomorrow, Monday, March 12 as a team of Gunpowder RIVERKEEPER® volunteers take part in Maryland Department of Natural Resources, (MDDNR) Stream Waders training. GRK volunteers are trained annually in scientifically defensible methods of collecting aquatic insects in tributaries within the sub-watersheds of the Gunpowder River. The Watershed covers parts of York County, Pennsylvania and Baltimore, Carroll and Harford Counties in Maryland. The macro-invertebrate samples are identified by MD DNR staff biologists and scored in a Benthic Index of Biotic Integrity, (BIBI). This information is used by the Maryland Department of the Environment, (MDE) to characterize stream health and identify potential impairments to biological communities. MDE uses BIBI as a component of state narrative water quality standards to uphold Clean Water Act classifications and mandates in the Gunpowder Watershed.