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Environmental Management

, Volume 30, Issue 4, pp 508–515 | Cite as

Section 404 Wetland Mitigation and Permit Success Criteria in Pennsylvania, USA, 1986–1999

  • Charles Andrew Cole
  • Deborah Shafer

Abstract

Twenty-three Section 404 permits in central Pennsylvania (covering a wetland age range of 1–14 years) were examined to determine the type of mitigation wetland permitted, how the sites were built, and what success criteria were used for evaluation. Most permits allowed for mitigation out-of-kind, either vegetatively or through hydrogeomorphic class. The mitigation process has resulted in a shift from impacted wetlands dominated by woody species to less vegetated mitigation wetlands, a trend that appears to be occurring nationwide. An estimate of the percent cover of emergent vegetation was the only success criterion specified in the majority of permits. About 60% of the mitigation wetlands were judged as meeting their originally defined success criteria, some after more than 10 years. The permit process appears to have resulted in a net gain of almost 0.05 ha of wetlands per mitigation project. However, due to the replacement of emergent, scrub–shrub, and forested wetlands with open water ponds or uplands, mitigation practices probably led to a net loss of vegetated wetlands.

KEY WORDS: Mitigation; Pennsylvania; Permits; Section 404; Success criteria; Wetland creation 

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Copyright information

© Springer-Verlag New York Inc. 2002

Authors and Affiliations

  • Charles Andrew Cole
    • 1
  • Deborah Shafer
    • 2
  1. 1.Penn State University, Center for Watershed Stewardship, 227 East Calder Way, University Park, Pennsylvania 16801, USAUS
  2. 2.US Army Corps of Engineers, Engineer Research and Development Center, Vicksburg, Mississippi 39180, USAUS

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