You are here

In Executive Order 13807, signed Aug.15, President Donald Trump revoked Executive Order 13690, which was signed by President Barack Obama on Jan. 30, 2015.

Executive Order 13690 had established the ...

Subscribe to our Blogs

Tagsfloodplain, 100-year flood, EO 13807, EO 13690,

This article is the first in our blog series on HEC-RAS modeling. Be sure to check back for subsequent series articles.

Background

The Federal Emergency Management Agency (FEMA) regulates development within the 100-year floodplain by administrating the National Flood Insurance Program (NFIP). Communities that participate in the NFIP must prevent excessive development within the floodplain that could cause increases in potential flood damage. FEMA also does not allow development to occur within the floodway, which has a maximum allowable surcharge of...

Subscribe to our Blogs

TagsHEC-RAS, Floodway, floodplain, 100-year flood, FEMA,

In 1978, the Carter administration implemented an executive order (EO 11988) that provided standards for Federal projects within a floodplain. Basically, EO 11988 was an attempt to curtail federal projects from being built within the floodplain, with the floodplain being defined by the 100-year flood limits. The 100-year flood limit was established as a mapping limit for insurance purposes, but has evolved over the years to be interpreted by the public as a safety zone, beyond which flooding and the associated dangers are not very likely. Of course we all know and realize, this 100-year...

Subscribe to our Blogs

Tagsfloodplain, 100-year flood, flood risk management, EO 13690,