What activities are subject to the Inundation Risk Zone standards?

Inundation Risk Zone standards apply to three types of activity:

Residential buildings

• All new, substantially damaged or substantially improved residential buildings
• One or more single-family homes or duplexes
• Residential subdivisions
• Multi-residence buildings such as hotels, condominiums, and apartments

Critical buildings

• Buildings defined as ASCE Flood Design Class 3 and 4
• New, substantially damaged or substantially improved schools, fire and police stations, medical facilities, correctional facilities, power generating stations, critical aviation facilities.

Critical infrastructure

• Public or private infrastructure (excluding buildings) that is critical for emergency response and recovery during and after a flood, or that poses a risk to public health, safety, and welfare should it be damaged or unable to perform its intended functions during or after a flood.