Description: Node representing the top opening for an access point to a storm drain line. The node is often times associated with a junction box , which is a structure that accommodates changes in flow direction, pipe diameter and elevation where multiple storm drain lines intersect. Manholes will be drawn from a combination of aerial photography and georeferenced engineering plans and assigned attribute information from the respective plans. Field Crews then collected coordinates, verified or corrected plan attribute information, and additional information for each Manhole based on a survey procedures manual.
Description: Node representing a storm drain network structure designed to allow water into the storm drain system. Inlets will be drawn from a combination of aerial photography and georeferenced engineering plans and assigned attribute information from the respective plans. Field Crews then collected coordinates, verified or corrected plan attribute information, and additional information for each inlet based on a survey procedures manual.
Description: A point feature representing an opening where drainage enters the storm drain system at the end of a line. Infalls will be drawn from a combination of aerial photography and georeferenced engineering plans and assigned attribute information from the respective plans. Field Crews will then collect coordinates, verify or correct plan attribute information, and additional information for each infall based on the survey procedures manual.
Description: Node representing the location where flow is discharged from the storm drain system to a receiving body of water. Outfalls will be drawn from a combination of aerial photography and georeferenced engineering plans and assigned attribute information from the respective plans. Field Crews will then collect coordinates, verify or correct plan attribute information, and additional information for each outfall based on the survey procedures manual. Virtual links will be used to connect outfalls to channel centerlines or to pond points.
Description: A linear feature representing a closed underground drainage conveyance. Includes gravity and force mains, laterals, culverts (pipe and box), and siphons. Pipes will be drawn from a combination of aerial photography and georeferenced engineering plans and assigned attribute information from the respective plans. Pipes will only be broken where there is a change in attribute type or at major junctions. A main or culvert would be broken at a pipe size or slope change but not where a lateral joins a main pipe with no additional attribute changes on the main. A pipe would also break at all manhole locations. If a pipe's cross sectional shape is circular the user will populate the DIAM_IN field and not the HEIGHT_FT and WIDTH_FT fields.
Description: A linear feature representing various assets that act as inlets to the storm drain system. Drains will be digitized and attributed from a combination of aerial photography and georeferenced engineering plans. Drains will be drawn in the direction of flow. Survey crews will then capture a point location at the upstream and downstream point of the Drain and verify attribute information.