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Mitigation Projects > Wetland > Performance Standards

[Wetland] Performance Standards


Wetland performance standards specified in the SONGS Permit are given below.

Physical Standards

  1. Topography. The wetland shall not undergo major topographic degradation (such as excessive erosion or sedimentation).
  2. Water quality. Water quality variables shall be similar to reference wetlands
  3. Tidal prism. The designed tidal prism shall be maintained, and tidal flushing shall not be interrupted
  4. Habitat areas. The area of different habitats shall not vary by more than 10% from the areas indicated in the final restoration plan

Biological Standards

  1. Biological communities. Within 4 years of construction, the total densities and number of species of fish, macroinvertebrates and birds shall be similar to the densities and number of species in similar habitats in the reference wetlands.
  2. Vegetation. The proportion of total vegetation cover and open space in the marsh shall be similar to those proportions found in the reference sites. The percent cover of algae shall be similar to the percent cover found in the reference sites.
  3. Spartina canopy architecture. The restored wetland shall have a canopy architecture that is similar in distribution to the reference sites, with an equivalent proportion of stems over 3 feet tall.
  4. Reproductive success of salt marsh plants. Certain plant species, as specified in the work program, shall have demonstrated reproduction (i.e. seed set) at least once in three years.
  5. Food chain support. The food chain support provided to birds shall be similar to that provided by the reference sites, as determined by feeding activity of the birds.
  6. Exotic species. The important functions of the wetland shall not be impaired by exotic species.