MDEThis dataset consists of a digital geospatial representation of all identified Tier II segments in the State of Maryland. Based on data collected between 1995-2015, this dataset currently contains information for 253 designated Tier II stream segments. Main segment breakpoints were determined using the 100,000:1 National Hydrography Dataset (NHD). The final designated Tier II segments are the merged sub segments that make up the 24,000:1 NHD meeting the 100,000:1 breakpoints. Tier II stream segments generally terminate at confluences, impoundment outfalls, and tidal boundaries. Last Update: 9/11/2016 Contact: Angel D. Valdez, Antidegradation Implementation Lead Maryland Department of the Environment, 1800 Washington Blvd, Baltimore, MD 21230 Phone: 410-537-3606 E-Mail: angel.valdez@maryland.gov. Map Service Layer Link: https://mdewin64.mde.state.md.us/arcgis/rest/services/MDE_Water_Quality/MD_TierIIHighQualityWaters_2016/MapServer/1ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/6bb54dfd580e4fe5805bc462052d4463_1engMaryland iMapPublicMaryland Department of the Environment Water Quality - Tier II Stream Segments 2016 [Maryland]Web servicesMaryland2016