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Meetings Online: Flood Map Updates - Connecticut, Stevens, Wells, Waits, Ompompanoosuc, White River Discovery Meetings

5/1/2020 Update:


Online Discovery Meetings Scheduled:

  • Tuesday, May 26, 2020, at 11:00 AM
  • Wednesday, May 27, 2020, at 1:00 PM
  • Tuesday, June 2, 2020, at 9:00 AM

For: community leaders, emergency managers, GIS specialists, planners, and floodplain managers.

For information contact: 

James R. Nadeau

Hydrologic Technician

U.S. Geological Survey, New England Water Science Center





3/20/2020: Due to COVID-19, the FEMA Discovery meetings are postponed to a date to be announced.

Municipal officials in the Upper Connecticut River Watershed have been asked to participate in the Discovery phase of a new flood hazard map update. Please attend the appropriate meeting and/or contribute information online to help identify the priorities.

Three Discovery Meetings:

1. White River Watershed (with First, Second and Third Branches, the Tweed River and many tributaries)

Tuesday, March 31, 2020 at 1:30 PM

Bethel Town Hall, 318 Main Street, Bethel, VT

Free parking is available across Densmore Drive. Entry will be at the front entrance (facing Main Street).


2. Ompompanoosuc, Waits and Connecticut Rivers and many tributaries 

Wednesday, April 1, 2020 at 9:00 AM

Clifford Memorial Building, 65 South Court Street, Woodsville, NH


3. Wells, Stevens, Connecticut Rivers and many tributaries

Wednesday, April 1, 2020 at 1:30 PM, 

Littleton Public Library, 92 Main Street, Littleton, NH


Please RSVP to Scott Olson, the USGS Project Manager at or (603) 226-7815. 

The US Geological Survey (USGS) is conducting these preliminary meetings with municipal officials to inform the priorities for flood map updates.  This is the appropriate time to identify problematic flood-prone areas that may need higher quality flood studies.  RiskMAP is the current format for flood studies.  The updates are being conducted on a watershed basis. Much of the study area will be updated using Base Level Engineering (model-based flood mapping using the most recent hydrology and topography from one foot contours).  In some locations existing studies and Base Flood Elevations may be remapped on the most recent topography.  A few locations will be prioritized for fresh new studies incorporating field work and detailed information on bridges and other obstructions.  

When completed, this map information will update the Flood Insurance Rate Map that informs the community's flood hazard area regulations. Current Flood Insurance Rate Maps can be viewed at the FEMA Map Service Center 

Watershed Maps and Communities 

The White River Watershed map and Questionnaire for Municipal Officials is available here

The White River Watershed includes all or part of: Barnard, Bethel, Braintree,  Bridgewater, Brookfield, Chelsea, Chittenden, Corinth, Goshen, Granville, Hancock, Hartford, Killington,  Mendon, Norwich,  Pittsfield, Pomfret, Randolph, Ripton, Rochester, Roxbury, Royalton, Sharon, Stockbridge, Strafford, Tunbridge, Vershire, Warren, Washington, Williamstown, 

The Waits, Connecticut Watershed Map and Questionnaire for Municipal Officialis available here

This watershed includes all or part of: Bradford, Chelsea, Corinth, Fairlee, Groton, Hartford, Newbury, Norwich, Orange, Sharon, Strafford, Thetford, Topsham, Tunbridge, Vershire, Washington, West Fairlee, 

The Stevens, Wells and Connecticut Watershed Map and Questionnaire for Municipal Official is available here

This watershed includes all or part of: Barnet, Bradford, Concord, Danville, Groton, Lunenburg, Marshfield, Newbury, Peacham, Plainfield, Ryegate, Topsham, Waterford, Wells River, 


For more information for municipal officials please visit

Other flood map updates are now underway for:

  • Passumpsic River 
  • Middle Connecticut Watershed (South of Brattleboro)
  • Missisquoi River Watershed with Franklin and Orleans Counties
  • Lamoille River
  • Otter Creek and Lake Champlain Tributaries 
  • Deerfield River




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