Adverse effects impact the integrity or intactness of a historic structure or its surroundings. If you anticipate that your project will have an adverse effect to an historic structure, then you should consider ways to avoid those effects, minimize the effects, and if necessary, compensate for the effects. When possible, all projects should be designed to avoid adverse effects to historic structures. If adverse effects cannot be avoided, develop appropriate treatment measures into the scope of work so adverse effects are reduced and minimized. Lastly, if adverse effects cannot be avoided, compensate for the adverse effects through documentation or development of other treatment measures in consultation with FEMA, the State Historic Preservation Officer (SHPO) or Tribal Historic Preservation Officer (THPO), and other interested parties. Listed below are some of the possible adverse effects that your project may have, together with possible treatment measures that you may include in your project to avoid, reduce or minimize, or compensate for adverse effects. The list is illustrative, and does not include all adverse effects that a project may have or all of the ways to potentially treat those effects.
- Demolition of historic structure/building
- Consider alternatives: eliminate or reduce the hazard to the structure by some other means. Minimize adverse effects by retrofitting, elevating, or relocating the structure instead of demolition
- Compensate for adverse effects by salvaging architectural features before demolition
- Compensate effects by documenting the structure and surrounding views by demolition
- Compensate effects by documenting the structure in a historical narrative or through oral histories
- Compensate effects by erecting interpretive signage at the site documenting the structure
- Renovation or retrofit of historic structures that is incompatible with existing historic features
- Avoid adverse effects by moving the project to another location
- Avoid or minimize adverse effects by designing the project with in-kind elements
- Follow design guidelines set by municipal zoning laws or the SHPO
- Avoid or minimize adverse effects by documenting the structure and surrounding views by photo-recordation and/or measured drawings
- Intrusion of project into an historical viewshed, or construction that is incompatible with an existing historic context
- Avoid or minimize adverse effects by renovating or retrofitting with in-kind materials, or materials that are compatible with the historic context of the structure
- Compensate for adverse effects by documenting the structure and surrounding views by photo-recordation and/or measured drawings
- Compensate for adverse effects by erecting interpretive signage at the site documenting the structure.