A Flood Insurance Study (FIS) is developed in conjunction with the Flood Insurance Rate Map (FIRM). The FIS contains a narrative of the flood history of a community and discusses the engineering methods used to develop the FIRMs. The study also contains flood profiles for studied flooding sources and can be used to determine Base Flood Elevations for some areas.

All FISs can be viewed on FEMA's Map Service Center. PDF versions of the FISs for communities in Cheshire, Grafton, Hillsborough, Merrimack, Rockingham, Strafford, and Sullivan counties can be viewed and downloaded from UNH's GRANIT Web site.

Technical and administrative support data associated with an FIS may be available by request from FEMA's Project Library or the FEMA Region 1 office in Boston.

NH Flood Studies and Data

USGS Estimation of Flood Discharges at Selected Recurrence Intervals for Streams in NH

• USGS Scientific Investigations Report (2008–5206)
• NH StreamStats - an online application providing automated regression-equation solutions for user-selected sites on streams.

Comprehensive Flood Management Study Commission (NH House Bill 648)

• Final Report (September 2008)

Investigation of April 2007 Flood in Southern and Southeastern New Hampshire

• Final FEMA Report (July 2008)

Suncook River Avulsion Study

• Suncook River Geomorphology-based Restoration Alternatives Analysis Final Report (May 2008)

April 2007 Flood Data

• Flood of April 2007 in New Hampshire (USGS Report 2008-5120)

May 2006 Flood Report

• Flood of May 2006 in New Hampshire (USGS Report 2007-1122)

October 2005 Flood Report and Data

• Flood Study of Warren Brook in Alstead and Cold River in Alstead, Langdon, and Walpole, NH, 2005 (USGS Report 2006-1313)
• Flood of October 8 and 9, 2005, on Cold River in Walpole, Langdon, and Alstead and on Warren Brook in Alstead, New Hampshire (USGS Report 2006-1221)
• USGS Data Table
  

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