Description: This layer represents data collected at stream crossings throughout New Hampshire during the period from 2009 to 2016, for use in transportation, water management and hazard mitigation purposes. The attribute table contains a suite of information regarding each crossing, in addition to the geomorphic and aquatic organism passage compatibility rankings and the hydraulic capacity scores, all of which can be mapped for culvert replacement prioritization planning.
Service Item Id: 38c80a1cbe4d42e6a5c9ed87be69e215
Copyright Text: New Hampshire Geological Survey, New Hampshire Department of Environmental Services, Concord, NH
Description: This provides location information for river geomorphic features mapped during the NH implementation of the Vermont Phase 2 protocols. These include alluvial fans, beaver dams, grade controls, active migration features (flood chutes, potential avulsions), and steep riffles or headcuts. A separate guide , entitled "Descriptions of fluvial geomorphology data," from 2014, is available from the New Hampshire Geological Survey, Department of Environmental Services.
Service Item Id: 38c80a1cbe4d42e6a5c9ed87be69e215
Copyright Text: New Hampshire Geological Survey, New Hampshire Department of Environmental Services, Concord, NH
Description: This identifes the locations of roads that are near assessed rivers, as identified in the New Hampshire implementation of the Vermont Phase 1 and Phase 2 geomorphic assessment protocols.
Service Item Id: 38c80a1cbe4d42e6a5c9ed87be69e215
Copyright Text: New Hampshire Geological Survey, New Hampshire Department of Environmental Services, Concord, NH
Description: This identifies the locations of railroad lines that are near assessed rivers, as identified in the New Hampshire implementation of the Vermont Phase 1 and Phase 2 geomorphic assessment protocols.
Service Item Id: 38c80a1cbe4d42e6a5c9ed87be69e215
Copyright Text: New Hampshire Geological Survey, New Hampshire Department of Environmental Services, Concord, NH
Description: This identifies the location of river lengths that have been straightened. These locations were identified through statewide field assessments conducted by the New Hampshire implementation of the Vermont Phase 2 geomorphic assessment protocols.
Service Item Id: 38c80a1cbe4d42e6a5c9ed87be69e215
Copyright Text: New Hampshire Geological Survey, New Hampshire Department of Environmental Services, Concord, NH
Description: This identifes the locations of linear impacts that are near assessed rivers, as identified in the New Hampshire implementation of the Vermont Phase 1 and Phase 2 geomorphic assessment protocols. Impacts addressed include erosion, berms, no riparian buffers, mass failures, road and rail encroachments, riverside devlopment, improved paths, riverside development, straightening and bank armoring.
Service Item Id: 38c80a1cbe4d42e6a5c9ed87be69e215
Copyright Text: New Hampshire Geological Survey, New Hampshire Department of Environmental Services, Concord, NH
Description: These are the Fluvial Erosion Hazard zones for the State of New Hampshire, which have been delineated based upon statewide fluvial geomorphology assessments (New Hampshire implementation of Vermont Phase 2 protocols). A separate guide, entitled "Descriptions of FEH zones," from 2014, is available from the New Hampshire Geological Survey, Department of Environmental Services.
Service Item Id: 38c80a1cbe4d42e6a5c9ed87be69e215
Copyright Text: New Hampshire Geological Survey, New Hampshire Department of Environmental Services, Concord, NH