Text Size     

Protecting Your Property From Flooding...Fuel Tanks

Are You At Risk?

If you aren't sure whether your house is at risk from flooding, check with your local floodplain manager, building official, city engineer, or planning and zoning administrator. They can tell you whether you are in a flood hazard area. Also, they usually can tell you how to protect yourself and your house and property from flooding.

What You Can Do

Flood protection can involve a variety of changes to your house and property -- changes that can vary in complexity and cost. You may be able to make some types of changes yourself. But complicated or large-scale changes and those that affect the structure of your house or its electrical wiring and plumbing should be carried out only by a professional contractor licensed to work in your state, county, or city. One example of flood protection is anchoring fuel tanks. This is something that skilled home-owners can probably do on their own.

Anchor Fuel Tanks

Illustration of Properly Anchored Fuel TankUnanchored fuel tanks can be easily moved by flood waters. These tanks pose serious threats not only to you, your family, and your house, but also to public safety and the environment. An unanchored tank outside your house can be driven into your walls, and it can be swept downstream, where it can damage other houses. When an unanchored tank in your basement is moved by flood waters, the supply line can tear free and your basement can be contaminated by oil. Even a buried tank can be pushed to the surface by the buoyant effect of soil saturated by water.

As shown in the figure, one way to anchor a tank is to attach it to a large concrete slab whose weight is great enough to resist the force of flood waters. This method can be used for all tanks, both inside and outside your house. You can also anchor an outside tank by running straps over it and attaching them to ground anchors.


Keep these points in mind when you anchor a fuel tank:

  • If you prefer not to do this work yourself, you can have a handyman or contractor anchor your tank.

  • Extend all filling and ventilation tubes above the 100-year flood level so that flood waters cannot enter the tank.

  • Close all connections when flood warnings are issued

Estimated Cost

Anchoring a 1,000-gallon fuel tank to a concrete base will cost you about $300 to $500. Using straps and ground anchors will cost about $300.

Other Sources of Information

Protecting Your Home from Flooding, FEMA, 1994

Repairing Your Flooded Home, FEMA-234, 1992

Flood Emergency and Residential Repair Handbook, FIA-13, 1986

Retrofitting Flood-Prone Residential Structures, FEMA-114, 1986

Protecting Building Utilities from Flood Damage, FEMA -348, 1999

To obtain copies of these and other FEMA documents, call FEMA Publications at 1-800-480-2520. Information is also available on the World Wide Web at http://www.fema.gov.