First Floor Elevation Reference Boston City Base

Bfes listed on fema flood insurance rate maps are based on the 1 annual chance flood.

First floor elevation reference boston city base.

Base flood elevation bfe the elevation of surface water resulting from a flood that has a 1 chance of equaling or exceeding that level in any given year. City hall is open to the public on tuesdays thursdays and fridays from 9 a m. Boston city base bcb. The north american vertical datum of 1988 navd 88 is the official vertical datum of the united states having superseded the older national geodetic vertical datum of 1929 ngvd.

Ommended that the elevation requirements of asce 24 that exceed the minimum elevation requirements of the nfip be followed. This is a good way to reduce your flood risk and it can also reduce future flood insurance premiums. Elevate your home s lowest floor above the updated flood elevation provided by fema or the base flood elevation bfe shown on your community s effective firm whichever is higher. Fema defines the base flood elevation bfe as the computed elevation to which the flood is anticipated to rise during the base flood.

Just in case those terms are new to you the 1 percent annual chance flood means that statistically there s a 1 chance every year that there will be a flood that looks. Defined by fema as the top of water elevation projected for a specified flooding scenario. If you choose to elevate you must raise your home at least two feet above the base flood elevation. Elevating your home above the projected flood elevation base flood elevation can keep your home and belongings safe from damage.

Base flood elevation bfe. The bfe is shown on the flood insurance rate map firm for zones ae ah a1 a30 ar ar a ar ae ar a1 a30 ar ah ar ao v1 v30 and ve. Base flood a flood having a 1 percent or 1 in 100 chance of occurring in any given year. A public hearing will be held by the board of appeal ofthe city of boston in room 801 city hall upon the appeal of joseph holland seeking with reference to the premises at 163 newbury st ward 05 for the terms ofthe boston zoning code see acts of 1956 c.

Using a fixed reference point as a baseline i e a zero elevation point elevation values can be consistently measured and compared among various maps and surveys. The base flood is also referred to as the 1 percent annual chance flood or 100 year flood. 665 in the following respect gcod article s. An elevation certificate will show the bfe.

A city wide datum that can be converted to navd88 by using a conversion factor of bcb 6 46 feet. It is also referred to as the 100 year flood and is the basis for the nfip administered by fema. By relocating it. You must be able to show that the lowest elevation of the building the top of bottom floor on your elevation certificate is above the base flood elevation bfe to be eligible for the adu program.