compensatory mitigation
- the replacement of a natural resource such as a wetland that is often required by the
enforcement of Section 404 of the Clean Water Act by the U.S. Army Corps of Engineers or
by State regulations enforced by other regulatory agencies. This usually involves the
replacement of wetland functions such as water quality, habitat, and hydrologic functions
and usually is also meant to replace an acreage equal to or greater than that which was
lost or impacted.
shoreline stabilization
- The use of structures and/or planting of vegetation, usually marsh vegetation, along an
eroding shoreline in order to protect the shoreline from further erosion and remediate
erosion that may have already occurred. Sometimes this results in the restoration of lost
salt marsh habitat. For this database use of marsh grass planting for shoreline
stabilization was considered marsh restoration.
habitat type - the type of wetland. This
database includes several marsh and forested wetland types.
wetland - for regulatory purposes, the
definition generally used is the Army Corps of Engineers definition where a wetland is
"an area inundated or saturated by surface or ground water at a frequency and
duration sufficient to support, and that under normal circumstances does support, a
prevalence of vegetation typically adapted for life in saturated soil conditions."
"Jurisdictional wetlands" meet specific criteria outlined in the 1987 Field
Guide for Wetland Delineation and have hydric soils, wetland hydrology and hydrophytic
vegetation. Coastal wetlands, on the other hand, as regulated by the Coastal Area
Management Act, while generally meeting these criteria, have a more specific definition.
success criteria - those conditions
which must be met for a mitigation site to be considered successful in order to receive a
permit to impact those wetlands. These criteria may include any combination of the
following and often include all of the following: vegetation establishment, wildlife use
and a hydrologic regime that is characteristic of the target wetland type. |