Katherine Bagley has written an excellent discussion of the repetitive loss problem in the National Flood Insurance Program, highlighting a Louisiana property that has flooded 40 times over the past four decades:
The NFIP was established by the National Flood Insurance Act of 1968 (NFIA, 42 U.S.C. §4001 et seq.), and was most recently reauthorized by the Biggert-Waters Flood Insurance Reform Act of 2012 (Title II of P.L. 112-141). The general purpose of the NFIP is both to offer primary flood insurance to properties with significant flood risk, and to reduce flood risk through the adoption of floodplain management standards.
An excellent post by Professor Craig Colten on the events leading to the August 2016 flood:
Reports of flooding in Louisiana may conjure up images of Hurricane Katrina, but these rivers are completely separated from the Mississippi River, and these floods posed no threat to New Orleans. Nonetheless, based on my experience studying risk and resilience in this region, I see parallels between the damage of current flooding and the damage caused by Katrina. In both cases, human decisions magnified the consequences of extreme natural events. Planning and permitting enabled development in areas that had experienced repeat floods, and agencies had failed to complete projects designed to mitigate flood damage before the storms hit.
The Federal Emergency Management Agency (FEMA) is proposing to amend 44 CFR part 9 “Floodplain Management and Protection of Wetlands” and issue a supplementary policy to implement the Federal Flood Risk Management Standard (FFRMS) that was established by Executive Order 13690.
The mayor of Walker, a small town near Baton Rouge that flooded in the August 2016 flood, wants to sue the State of Louisiana for flooding caused by the recent expansion of federal highway I12. (While the Federal Department of Transportation funds highway construction, the designed and construction is done by the state and its contractors.) A class action lawsuit was filed against the State after the 1983 flood, alleging that a different stretch of I12 blocked the drainage for a group of homeowners and caused them to flood. The plaintiffs were successful and won a sizable verdict against the state. Unfortunately, in Louisiana, there is no way to enforce a state court judgment against the State, so the plaintiffs were never able to collect the judgment.
This document is a compilation of flood resistant provisions, prepared by the Federal Emergency Management Agency (FEMA), of the 2015 I-Codes (IBC, IRC, IEBC, IMC, IPC, IFGC, IFC, ISPSC, IPSDC, ICC-PC). Also included, as a separate document, is a summary of changes from the 2012 I-Codes.
General References on the 1% (100-year) flood standard:
See Also: What is a 100/500/1000-Year Flood Event?
This started the 100 year rain event system. Although it was never intended to be about flooding, the notion of a 100 year event was later incorporated into the NFIP when it was passed in 1968.
The record of Mississippi River floods goes back to the earliest explorers: High Flows and Flood History on the Lower Mississippi River Below Red River Landing, LA (1543 – Present) and the paleoclimate records show megafloods greatly exceeding even the 1927 flood: , , and (1999), Marine evidence for episodic Holocene megafloods in North America and the northern Gulf of Mexico, Paleoceanography, 14(4), 498–510, doi:10.1029/1999PA900017; and Tripsanas, E.K. et al., 2013. Paleoenvironmental and paleoclimatic implications of enhanced Holocene discharge from the Mississippi River based on the sedimentology and geochemistry of a deep core (JPC-26) from the Gulf of Mexico. Palaios, 28(9), pp.623–636.
This is a project to develop off-shore wind off Cape Cod. It’s relevance to the Louisiana Coast is that the appeals court ruled that the EIS was incomplete because there was not sufficient geological information about the sea bottom and whether it could support the structures.