This line dataset represents locations of existing and proposed CO2 pipelines in the United States. This layer includes data for all interstate pipelines and major intrastate pipelines for the spring quarter of 2013. This layer is intended to assist users in locating and analyzing carbon dioxide pipeline data in the United States and may be used for basic applications such as viewing, querying, and map output production, or to provide a basemap to support graphical overlays and analysis with other spatial data. Hart Energy Publishing. (2012). Carbon Dioxide (CO2) Pipelines in the United States, Spring 2012. Hart Energy Publishing. Available at: http://purl.stanford.edu/vx938wg0053. This release is intended to replace all previous datasets. This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.