Summary of the Mitigation Program for Rare Plant Populations along the Portland Natural Gas Transmission System (PNGTS) and PNGTS/Maritimes & Northeast Joint Facilities Projects

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外文摘要：During 1998 and 1999， Portland Natural Gas Transmission System ("PNGTS") and Maritimes & Northeast Pipeline， L。L。C。 ("Maritimes") (collectively the "Owners") constructed approximately 292-miles of 12-， 24-， and 30-inch outside diameter pipeline (the Projects) through portions of Massachusetts， New Hampshire， Maine， and Vermont。 Prior to construction， background research and field surveys were performed identifying the rare， threatened， and endangered ("RTE") plant and animal species located along the project route。 Field surveys identified a total of 25 different RTE plant species located in 57 discrete populations; no animal species were identified。 All plant species identified were state-designated， and no Federally-designated Threatened or Endangered species were identified。 Avoidance of RTE plant populations was the preferred form of mitigation considered， however avoidance was not always feasible。 Where avoidance was not possible， alternative mitigation measures were developed in conjunction with the appropriate regulatory agencies。 A key component of the mitigation program involved removal and temporary nursery storage of rare plants during construction， and subsequent replanting in their approximate original locations following the completion of construction。 Other mitigation measures included topsoil segregation/replacement and use of timber mats to cover and protect the populations from heavy equipment traffic。 Post construction monitoring after the first growing season revealed that all but one of the rare plant populations is viable and vigorous following the first growing season。 Based on initial results， we conclude that the techniques implemented were successful。 Proper transplanting during the appropriate season， special care and over-winter handling by a qualified nursery， and replanting in suitable habitat and during the appropriate time window， are critical factors in determining program success。 Such techniques may be applicable to other pipeline projects。

外文关键词：

rare plant populationssuitable habitatmitigationreplantingmonitoring plan

作者：

J. Roger Trettel、Sandra J. Lare、Brett M. Battaglia

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作者单位：

Northern Ecological Associates, Inc., 451 Presumpscot Street, Portland, ME 04103, USA

会议名称：

The Seventh International Symposium on Environmental Concerns in Rights-of-Way Management

会议地点：

Calgary(CA)

会议母体文献：

The Seventh International Symposium on Environmental Concerns in Rights-of-Way Management Sep 9-13, 2000 Calgary, Alberta, Canada

页码：

p.127-133

出版时间：

2000