20201403 Ver 1_No Practicable Alternatives_PNG Line 473_rev_20201113

Piedmont Natural Gas (PNG) Line 473 Project — No Practical Alternatives for Impacts to Protected
Riparian Buffers
All route alternatives are considered and designed to reduce environmental impacts and keep land
disturbance to a minimum. Elimination and/or reducing impacts to protected riparian buffers was
considered during route analysis for the Line 473 Project. Alternate pipeline routes would either conflict
with landowner requests or cause increased environmental impacts. The direction and location of the
proposed pipeline and direction, location, and meandering nature of the streams within the Project area
does not enable a route for complete avoidance of protected riparian buffers. There are no other viable
alternatives to the Proposed Project area that would completely avoid impacts to protected riparian
buffers. The Project has been reduced in size to the extent possible so the purpose of the Project can be
practically accomplished while minimizing disturbance, preserve aquatic life and habitat and protect
water quality to the extent possible.
Impacts to protected riparian buffers are avoided and minimized to the greatest extent possible. Impact
minimization began during the siting process when the pipeline was routed to parallel existing roads and
highways and avoid cutting through large areas of undisturbed forest containing streams and wetlands.
Best management practices will be used to minimize disturbance, preserve aquatic life, and protect
water quality.
For the three stream crossings and wetlands along Highway 42 (Streams A, C, and D), the 50-foot-wide
permanent easement will be acquired with a 30-foot-wide maintained corridor and the remaining 20-
foot-wide area will serve as temporary construction workspace. There is no additional temporary
workspace proposed outside the 50-foot-wide permanent easement at the stream crossings and within
the 50-foot riparian buffer in an effort to reduce impacts to the Neuse River protected riparian buffers
and to reduce impacts to Wetland A and Wetland C. Additionally, a 75-foot-wide construction corridor is
proposed through the riparian area of Stream A north of NC Business Route 70 (Stream A southern
crossing in attached figures). The wider construction corridor through the wetland is required because
the route parallels the railroad along the north side of NC Business Route 70, which limits access points
to the construction corridor. The additional temporary workspace is needed to install proper matting
and for equipment to move in both directions along this portion of the route.
Please refer to the following table for the square footage impacts in Zones 1 and 2 for each of the
crossings. The square footages for the crossings include the total construction impacts. Please refer to
the attached figure illustrating the pipeline installation with both temporary workspace and the
permanent easement at both crossings.
Stream
Zone 1 Impact
Zone 2 Impact
Stream A (north of NC
Business Route 70)
4,739
3,159
Stream A (along
Highway 42)
31515
2,268
Stream C
3,143
2,097
Stream D
3,658
2,406

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Temporary Workspace
Intermittent Stream
Permanent Easement
Perennial stream
Stream A (southern Crossing)
Centerline
Emergent Wetland
BURNS
Neuse River Buffer Zones
4
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Neuse River Buffer: Zone 1
Forested Wetland
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Line 473
Johnston County, NC
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- Neuse River Buffer: Zone 2
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4 Feet
- Temporary Workspace
u
- Intermittent stream
Permanent Easement
Perennial stream
Stream A (northern crossing)
Centerline
Emergent Wetland
BURNS Neuse River Buffer Zones
4 Neuse River Buffer: Zone 1
J
L
Forested Wetland
`M�©QNNEL!_ Line 473
Johnston County, NC
- Neuse River Buffer: Zone 2
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e: Burns & McDonnell Consultants, Inc.

Source: Burns & McDonnell Consultants, Inc.