Secondary and Cumulative Impacts Master Management Plan - 2014

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Article 6: Riparian Buffers
Section 6.8. Uses and Activities Permitted in Riparian Buffers
6.6.3. Riparian Buffer Variance Review Standards
Morrisville, NC April 2013
Unified Development Ordinance - Public Review Draft Page 6-15
Table
Use or Activity Exempt [1] Allowable [2]
Allowable
with
Mitigation [3]
Road relocation:
Relocation of existing private access roads associated with public
road projects that are necessary for public safety and impact no
more than 2,500 square feet of riparian buffer
X
Relocation of existing private access roads associated with public
road projects that are necessary for public safety and impact
more than 2,500 square feet of riparian buffer
X
Scientific studies and stream gauging X
Streambank or shoreline stabilization X
Temporary roads associated with culvert installation or bridge
construction or replacement, where the disturbed area is restored to
pre-construction topographic and hydrologic conditions immediately
after construction is complete and replanted immediately with
comparable vegetation—provided that: tree planting may occur
during the dormant season; a one-time application of fertilizer may
be used to establish vegetation; and the restored buffer shall comply
with the restoration criteria in Section 6.9.5, Riparian Buffer
Restoration or Enhancement, by the end of five years
X
Temporary sediment and erosion control devices for work within a
stream channel that is authorized under Sections 401 and 404 of the
Federal Water Pollution Control Act, where the disturbed area is
restored to pre-construction topographic and hydrologic conditions
immediately after construction is complete and replanted immediately
with comparable vegetation—provided that: tree planting may occur
during the dormant season; a one-time application of fertilizer may
be used to establish vegetation; and the restored buffer shall comply
with the restoration criteria in Section 6.9.5, Riparian Buffer
Restoration or Enhancement, by the end of five years
X
Temporary sediment and erosion control devices for work within a
stream channel that is not authorized under Sections 401 and 404 of
the Federal Water Pollution Control Act, where the disturbed area is
restored to pre-construction topographic and hydrologic conditions
immediately after construction is complete and replanted immediately
with comparable vegetation—provided that: tree planting may occur
during the dormant season; a one-time application of fertilizer may
be used to establish vegetation; and the restored buffer shall comply
with the restoration criteria in Section 6.9.5, Riparian Buffer
Restoration or Enhancement, by the end of five years
X
Utility line crossings of streams and other surface waters subject to this
article: X
Above-ground elective line crossings that are perpendicular to the
stream and disturb no more than 150 linear feet of riparian
buffer [4][5][6]
X
Above-ground elective line crossings that are perpendicular to the
stream and disturb more than 150 linear feet of riparian buffer
[4][5][6]
X
Above-ground elective line crossings that are not perpendicular to
the stream and impact Zone Two4 X
Underground electric line crossings that are perpendicular to the
stream and disturb no more than 40 linear feet of riparian buffer
[4][6][7]
X
Underground electric line crossings that are perpendicular to the
stream and disturb more than 40 linear feet of riparian buffer
[4][6][7]
X
Underground electric line crossings that are not perpendicular to
the stream and impact Zone Two [4] X