"This report documents the flood of May of 2006 by presenting the flood data collected at the streamgages (48 active and 17 discontinued) in central and southern New Hampshire. The flood data include peak-stage data, peak-discharge data, flow-frequency curves, and estimates of flood recurrence intervals at each streamgage. In addition, data were compiled from FEMA flood-insurance studies for comparison purposes. The active streamgages included 37 operated by the USGS, 8 operated by the New Hampshire Department of Environmental Services (NHDES), 2 operated by the U.S. Army Corps of Engineers (USACE), and 1 operated privately. All 17 discontinued streamgages were those that had been operated by the USGS. A description of each streamgage location included in this investigation is listed in table 1 (in back of report)."
U.S. Geological Survey: http://infotrek.er.usgs.gov/pubs/