Flood Management

FEMA Flood Insurance Information - from the National Flood Insurance Program (NFIP): DRAFT of FEMA's updated floodplain (PDF)

June 4, 2010 FEMA updated the local floodplain. This map was created during the draft process. This is a good planning tool, but do not make detailed decisions based on what is here without confirming on the FEMA website.
FEMA Hazard Mitigation - Information on Hazard Mitigation Grants and Flood Mitigation Assistance
FEMA Mitigation Grants website

FEMA Local Multi-Hazard Mitigation Planning Guide
A FEMA document

So, you live behind a levee?
An informational brochure (PDF) compiled by several organizations including FEMA and the Army Corps of Engineers

How a flood control dam works
Document written by Oklahoma Conservation Commission (PDF)

Roles of Dams for Irrigation, Drainage and Flood Control
Document (PDF) written by the International Commission on Irrigation and Drainage

Map of Clay Pit Brook Neighborhood
Map showing the difference in flood elevation (PDF) of 2006 and 2007

Hidden Infrastructure
The Boston Society of Civil Engineers (BSCE) newsletter (PDF) has a feature called Hidden Infrastructure. See page 6 for the article

Hidden Infrastructure (the answer)
If you couldn't get the answer from the previous edition of the newsletter, the answer is on page 6 of this edition (PDF).

Merrimack River Basin Map
Map from the Corps of Engineers website showing the area included in the Merrimack River basin (PDF). Rain that lands anywhere in this area will end up in the Merrimack