Municipal Sewer Manholes

This data is a collection of sanitary sewer manholes within Westchester County (excluding manholes on the Westchester County Trunkline). The data was initially digitized from the early 1990's Sanitary Sewer Evaluation Study (SSIS) and then augmented with more recent and up to date data from local governments where available. As of October 5, 2015 this is the most up to date version of the sewer manholes available.本数据集收录了威彻斯特县（Westchester County）范围内的生活污水管道检查井，不含该县干线管道上的检查井。该数据集最初由20世纪90年代初的生活污水管道评估研究（Sanitary Sewer Evaluation Study, SSIS）数字化而来，随后通过可获取的地方政府最新数据进行了增补完善。截至2015年10月5日，本数据集为当前可获取的最新版污水检查井数据。