Albuquerque’s river levees are so old that they’re faced with being decertified by the Federal Emergency Management Agency. If that happens, they’re essentially considered to be nonexistent, which could lead to flood insurance premiums rising by $500 to $2000 for property owners in the Rio Grande flood plain.
Contributing factors include the levees’ age, trees growing on the levees, weakening them; and drainage pipes that no longer work, according to the Albuquerque Journal today. New standards for levees were developed after Hurricane Katrina, and Albuquerque’s 1950’s era levees are rated by the U.S. Army Corps of Engineers as “poor.”
Small portions of the levees have already been decertified—in Corrales, Bernalillo, and part of Albuquerque’s South Valley. Now, 27 miles of levees through the heart of Albuquerque are being reviewed. Nearly 13,000 buildings and property worth $1.4 billion are located in the boundaries of the flood plain that would be created if the levees are decertified. Bringing the levees into compliance would require complete reconstruction.
The Journal has an interesting synopsis of the history of the levees, and the ramifications for specific areas of the city. Interestingly, certain parts of Albuquerque metro area–Mountainview, Isleta and Belen–never had levee protection in the first place, and those property owners have always paid extra for flood insurance.