20150994 Ver 5_401 Application_20200805

S&ME, INC. / 9751 Southern Pine Blvd / Charlotte, NC 28273 / p 704.523.4726 f 704.525.3953 / www.smeinc.com
August 4, 2020
U.S. Army Corps of Engineers
Asheville Regulatory Field Office
151 Patton Avenue, Room 208
Asheville, North Carolina 28801-5006
Attention: Ms. Brandee Boggs
NC Division of Water Resources - 401 & Buffer Permitting Branch
Department of Environmental Quality
1617 Mail Service Center
Raleigh, NC 27699-1617
Attention: Mr. Paul Wojoski
Reference: Pre-Construction Notification: NWP No. 13/GC 4134
Broad River Bank Stabilization Project
Rutherford County, North Carolina
S&ME Project No. 7335-20-036
Dear Ms. Boggs and Mr. Wojoski:
On behalf of Dominion Energy North Carolina (DENC), S&ME, Inc. (S&ME) hereby submits this Pre-
Construction Notification (PCN) Application (PCN) for impacts to waters of the U.S. in accordance with
Nationwide Permit (NWP) No. 13. DENC plans to conduct bank stabilization activities to repair eroding
portions of their existing Line T01/M021 natural gas transmission pipeline easement at the point where it
crosses the Broad River.
As proposed, the work will be performed in accordance with the applicable conditions of Nationwide
Permit (NWP) No. 13 and General Water Quality Certification (WQC) No. 4134. However, submission of
this PCN to the US Army Corps of Engineers (USACE) is required because installation of the boulder toe
installation may exceed an average of one cubic yard per running foot, as measured along the length of
the treated bank, below the plane of the ordinary high water mark.
Pre-construction written approval from the North Carolina Division of Water Resources (NCDWR) is also
required because the project will incorporate turf reinforcement matting on portions of the slope, and
therefore may not comply with General Condition No. 7. Additional information related to the need for
the reinforcement matting, which will be limited to areas above the bank full level, is provided herein.
Pre-Construction Notification: NWP No. 13/GC 4134 August 4, 2020
Broad River Bank Stabilization Project Page 2
S&ME, Inc.
In support of this application, the following accompanying information has been submitted through the N.C.
Division of Water Resources (NCDWR) On-line PCN website (https://edocs.deq.nc.gov/Forms/Pre-
Construction_Notification_Form):
Figures
Delineation Information
Site Photographs
Authorization to Act as Agent
Construction Drawings
NC Natural Heritage Program (NCNHP) Database Report and US Fish and Wildlife Service (FWS) IPaC Report
Project Background
The project area is located along the Broad River, west of Jim Dobbins Road and east of Ken Miller Road in
Rutherford County, NC (35.276377°N, -81.985626°W). More specifically, the site consists of a portion of DENC’s
T01/M201 natural gas transmission pipeline easement, adjacent to Rutherford County PIN No. 1506899614
(Figure 1). The existing easement is abutted on either side by undeveloped woodland, and no existing
aboveground structures are present. The project area is located in the Upper Broad River Basin (HUC 03050105).
Review of the Rutherfordton South, NC US Geological Survey (USGS) Topographic Map (Figure 2) depicts the
project area as forested land. Soils mapped within the project area (Figure 3) are limited to Pacolet sandy loam
(Typic Kanhapludults) and Buncombe loamy sand. Neither of these soils are classified as hydric.
A new 20-inch diameter natural gas transmission pipeline (T01) was installed in the easement in 2017 (SAW-2016-
00773/NCDWR No. 15-0994) and the portion of an adjacent, pre-existing 8-inch diameter pipeline (M201) that
was located beneath the river was replaced in 2020. Both T01 and the replacement segment of M201 were
installed beneath the river by horizontal directional drill (HDD). The project area is within the permitted limits of
disturbance associated with NCDEQ Project ID: RUTHE-2020-009.
Over the course of performing routine inspections of the easement, and later during installation of the M201
pipeline, areas of active bank erosion were observed along both banks of the portion of the river within the
existing easement (see photographs included in the information submitted with the online PCN). To help reduce
further erosion and protect the existing transmission lines, DENC is proposing to stabilize the eroding areas on
both banks of the river using natural materials to the extent practicable.
Jurisdictional Areas
The portion of the Broad River located within the project area was previously delineated by S&ME in connection
with the T01B Replacement Project. The delineation was conducted utilizing currently accepted methods for
wetland determination, as set forth in the 1987 Corps of Engineers Wetlands Delineation Manual and the
corresponding Eastern Mountain and Piedmont Region USACE Regional Supplement Guide. A Request for
Preliminary Jurisdictional Determination (Pre-JD) package was provided to the USACE on October 14, 2016.
Representatives of the USACE (David Brown and Steve Kichefski) and NCDWR (Kevin Mitchell) visited the project
site on November 17, 2016 to approve the original delineation and verify the location/classification of affected
features.
Pre-Construction Notification: NWP No. 13/GC 4134 August 4, 2020
Broad River Bank Stabilization Project Page 3
S&ME, Inc.
The project area was re-assessed by S&ME in April 2020 to confirm the findings of the previous delineation. The
site visit confirmed that aside from the Broad River itself, no additional jurisdictional features were identified
within the project area.
Description of the Proposed Work
The project area consists of DENC’s existing permanent easement along with temporary workspace previously
acquired and used in connection with the T01/M228 pipeline installations. Other than pipeline markers, no
existing aboveground structures are present. The bank stabilization project will temporarily affect approximately
75 linear feet of stream bank, including the affected banks within the existing easement, and 10 to 12 feet on
either side of the easement where it is necessary to tie the proposed streambank grade back into the existing
grade outside of the easement.
The bank stabilization will consist of installation of boulder toe protection at the base of the existing banks,
followed by re-establishment of a bank full bench and grading to soften the existing slopes. An aqua barrier or
similar coffer dam will first be installed within the river along the toe of the bank to provide a suitably dry work
area for the boulder toe installation.
Live staking will be incorporated above the boulder toe. Above the lives takes, the bank will be sloped at a 2H:1V
grade, and a second bench (upper berm) will be incorporated to further soften the slope.
Because of the confined easement width, site grades flatter than 2H:1V could not be incorporated without
significant grading and tree removal outside of the existing easement. Therefore, re-graded portions of the
streambank above the bank full level will be stabilized with Green Armor turf reinforcement matting. Based on
geotechnical exploration and slope stability analysis conducted by S&ME, it was determined that the existing
banks consist of alluvium (very loose to loose, poorly graded sand and silt) to a depth of approximately eight feet.
The analysis concluded that safe inclinations without the use of rip-rap could be achieved are 1.75H:1V to 2H:1V,
but that turf reinforcement matting should be employed in the design due to anticipated overland flow and
associated erosion potential.
Incorporation of the Green Armor turf matting will provide rapid slope stabilization and will allow integration of
the native riparian seed mix. Although the matting is synthetic, the material does not consist of laminated or
stitched layers. Rather, its three-dimensional structure will provide an open matrix that will be hydraulically infilled
with high performance flexible growth media to bond the soil and seed and accelerate growth. No material
consisting of netting or stitching has been incorporated into the design.
As indicated, only minor grading will be required outside of the existing easement to tie the proposed streambank
stabilization grades back into the existing grade. The stabilization design and associated grading are depicted on
the construction drawings that accompany this PCN.
Normal flow and circulation patterns of the Broad River will not be permanently altered as a result of the
proposed stabilization project. Following stream bank stabilization, any temporarily affected areas will be restored
to original grades and contours, matted, and seeded with a riparian seed mix.
The project area is within the permitted limits of disturbance associated with NCDEQ Project ID: RUTHE-2020-009.
A modification to that approved Erosion & Sediment Control Plan will be submitted along with a floodplain
development permit application.
Pre-Construction Notification: NWP No. 13/GC 4134 August 4, 2020
Broad River Bank Stabilization Project Page 4
S&ME, Inc.
Protected Species
We understand that the USACE will determine compliance with applicable sections of the Endangered Species Act
(ESA) of 1973 (16 USC 1531-1543). The project site was initially reviewed in 2016 as part of a larger area subject to
a Protected Species Assessment conducted by S&ME in connection with the T01B Replacement Project. Results of
the assessment were provided to the FWS in an October 31, 2016 report that concluded the proposed project was
unlikely to adversely affect populations of federally-protected flora and fauna listed above or their critical habitat.
Following USFWS review report, the agency responded with a November 7, 2015 letter stating that they concurred
with S&ME’s findings. It was concluded that the requirements of Section 7 of the Act had been fulfilled. Both the
aforementioned report and FWS concurrence letter for that project can be provided upon your request.
As an update, S&ME submitted a request for information to the North Carolina Natural Heritage Program
(NCNHP). The NCNHP responded with an August 28, 2020 report that listed natural areas and protected species
with documented occurrences within one mile of the project area. Although several rare state-listed species have
been historically recorded, the report identified no occurrences of federally-protected species within one mile of
the site.
S&ME also consulted the FWS Information for Planning and Consulting (IPaC) system for a list of species that are
known or expected to be near the assessment area. The IPac report identified the following species as having
potential for direct or indirect affected by activities in the assessment area:
Indiana Bat
Status: Federally-listed Endangered
Biological Determination: No Effect
The Indiana bat is a small bat with a wingspan of about 9 to 11 inches and fur that is dark-brown to black. During
winter, the bat hibernates in humid caves or other similar structures (e.g., abandoned mines) that provide stable
temperatures between 32° F and 50° F. After hibernation, they migrate to their summer habitat in wooded areas
where they usually roost under the loose tree bark of dead or dying trees. During summer, males roost alone or in
small groups, while females roost in larger groups of up to 100 bats or more. They also forage in or along the
edges of forested areas.
Based on S&ME’s previous experience, Indiana bat is listed as a current occurrence for Rutherford County, but the
only record of this species is at the town of Bat Cave, which is not proximate to the project site. Accordingly, no
further action for Indiana bat should be required.
Northern Long-eared Bat
Status: Federally-Listed Threatened
Biological Determination: No Effect
The northern long-eared bat (Myotis septentrionalis) is a medium-sized bat about three to 3.7 inches in length but
with a wingspan of 9 to 10 inches. This bat generally is associated with old-growth forests composed of trees 100
years old or older. It relies on intact interior forest habitat, with low edge-to-interior ratios. Relevant late-
successional forest features include a high percentage of old trees, uneven forest structure (resulting in
multilayered vertical structure), single and multiple tree-fall gaps, standing snags, and woody debris.
Pre-Construction Notification: NWP No. 13/GC 4134 August 4, 2020
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Foraging occurs within forests, along forest edges, over forest clearings, and occasionally over ponds. Eleven
individuals (10 males, 1 female) tagged with chemical lights observed during the summer in Missouri, foraged
almost exclusively among the trees of hillside and ridge forests, rather than utilizing floodplain and riparian
forests; frequently foraging occurred within one to three meters of the ground. Foraging bats doubled back
frequently and only slowly moved out of the observation area. In Iowa, females were found primarily foraging in
mature deciduous uplands with adjacent deep ravines and in a disturbed riparian area with an adjacent floodplain
and agricultural lands.
Hibernation occurs primarily in caves, mines, and tunnels, typically those with large passages and entrances,
relatively constant and cool temperatures, high humidity, and no air currents. Hibernators frequently roost in
crevices, drill holes, and similar sites where they may be overlooked during surveys, but roosting in the open is not
uncommon. A lack of suitable hibernacula may prevent occupancy of areas that otherwise have adequate habitat.
The project as proposed should not have a significant effect on northern long-eared bat because the work will
take place primarily within an existing utility corridor that is already cleared of woody vegetation.
Dwarf Flowered Heartleaf
Status: Federally-Listed Threatened
Biological Determination: May Affect, Not Likely to Adversely Affect
Dwarf-flowered heartleaf is an evergreen, perennial herb in the birthwort family. It is distinguished from other
members in the genus by the small size of the flowers. Varying flowering periods are provided in the available
literature; Radford et al. (1968) indicate April to early May (1968), Weakley indicates March to June (2006), and the
USFWS indicates the optimal survey window to be March to May (2006). The leaves are dark green, sometimes
with silvery or gray mottling. Frequently, the tip of the leaf has a small indentation. The flowers are borne near the
ground surface, often under leaf litter, and are brownish to greenish in color. The habitat of dwarf-flowered
heartleaf is open deciduous woods, along streambanks, often on Pacolet, Madison, or Musella soils.
The wooded areas adjacent to the project corridor contain potentially-suitable habitat for this species. However,
no individuals of this species were previously observed in this area, and the proposed project will take place
largely within an existing utility easement. As such, this project it is not anticipated that this project will adversely
affect populations of this species.
Small Whorled Pogonia
Status: Federally-Listed Threatened
Biological Determination: May Affect, Not Likely to Adversely Affect
Small whorled pogonia (Isotria medeoloides) is a member of the orchid family. According to the USFWS species
description, it usually has a single grayish-green stem that grows about 10 inches tall when in flower and about 14
inches when bearing fruit. The leaves are arranged in a whorl near the top of the stem and beneath the flower. The
leaves are grayish-green, somewhat oblong and one to 3.5 inches long. The greenish-yellow flowers are about 0.5
to one inch long and appear in May or June. The fruit, an upright ellipsoid capsule, appears later in the year.
This species grows in older hardwood stands of beech, birch, maple, oak, and hickory that have an open
understory. Sometimes it grows in stands of softwoods such as hemlock. It prefers acidic soils with a thick layer of
dead leaves, often on slopes near small streams, and often occurs on flats or slope bases near canopy breaks.
Other orchids such as Cypripedium acaule, Goodyera tesselata, G. pubescens, Corallorhiza maculata, C. odontorhiza,
and Triphora trianthophora frequently occur with I. medeoloides. Although most of the above-mentioned
Pre-Construction Notification: NWP No. 13/GC 4134 August 4, 2020
Broad River Bank Stabilization Project Page 6
S&ME, Inc.
herbaceous species are quite common in a variety of habitats, they can serve as indicators of I. medeoloides when
they occur together in abundance. These ferns, clubmosses, evergreen forbs, and orchids characterize the plant
community found on acidic, sloping, fragipan soils.
No individuals of this species were previously observed in this area, and the proposed project will take place
largely within an existing utility easement. As such, this project it is not anticipated that this project will adversely
affect populations of this species.
White Irisette
Status: Federally-Listed Endangered
Biological Determination: May Affect, Not Likely to Adversely Affect
White irisette (Sisyrinchium dichotomum) is a perennial herb with winged, branching stems, four to eight inches
tall, rising above basal clumps of blue-green, grass-like leaves. Tiny white flowers bloom at the ends of the stems
from late May through July. The white flowers and dichotomous branching pattern distinguish it from similar
species. The plant flowers and fruits from late May to July, and a relatively small number of seeds are produced.
This species inhabits rich, basic soils in clearings and near the edges of upland woods where the canopy cover is
thin, often in places where the humus or mineral soil layers have been exposed by downslope runoff, which has
removed the litter layer from the soil's surface. In the past, the thin canopy cover (and possibly the thin litter layer
as well) was maintained by periodic fires and by native grazing animals. Now, most populations are in artificially
disturbed areas, such as power line and road easements.
No individuals of this species were previously observed in this area, and the proposed project will take place
largely within an existing utility easement. As such, this project it is not anticipated that this project will adversely
affect populations of this species.
Rock Gnome Lichen
Status: Federally-Listed Endangered
Biological Determination: No Effect
Rock gnome lichen (Gymnoderma lineare) is one of two lichens on the federal list of threatened and endangered
species, and the only member of the genus Gymnoderma to live in North America. Rock gnome lichen occurs in
dense colonies of narrow strap-like lobes that are about 0.04 inch across and generally one to two centimeters
(cm) long. These lobes are blue gray on the terminal upper surface, and generally shiny white on the lower surface,
grading to black near the base. The fruiting bodies are born on the tips of these lobes, are black, and have been
found from July through September. The primary means of propagation appears to be asexual, with colonies
spreading clonally.
This species occurs on shady or moss-covered rock. Further, it is found in areas of high humidity, either on high-
elevation cliffs, where it is frequently bathed in fog, or in deep river gorges at lower elevations. It is primarily
limited to vertical rock faces, where seepage water from forest soils above flows at (and only at) very wet times,
and large stream side boulders, where it receives a moderate amount of light, but not high-intensity solar
radiation. It is threatened by habitat change, especially due to loss of Fraser fir forests and by heavy recreational
use of its habitat.
Suitable habitat for rock gnome lichen was not observed in the project area, and the project is unlikely to affect
populations of this species.
Pre-Construction Notification: NWP No. 13/GC 4134 August 4, 2020
Broad River Bank Stabilization Project Page 7
S&ME, Inc.
Copies of the NCNHP and IPac reports are included with the information submitted online.
Historic and Archaeological Resources
The project site was assessed in 2016 as part of a larger area subject to a Phase I Archaeological Assessment
conducted by S&ME in connection with the T01B Replacement Project (NC State Historic Preservation Office
[SHPO] Project No. ER 16-0551). Results of the assessment were provided to SHPO in an October 2016 report. The
closest site identified during the assessment (Site 31PL102/102**) was a small nineteenth through twentieth
century artifact scatter and prehistoric lithic scatter located approximately 230 feet west of Ken Miller Road. This
site was recommended ineligible for inclusion on the National Historic Registry. SHPO concurred with the findings
of S&ME’s report in a January 17, 2017 letter. Accordingly, this project should not affect historic, cultural or
archaeological resources. Both the aforementioned Phase I report and SHPO concurrence letter for that project
can be provided upon your request.
Avoidance and Minimization
To minimize impacts to waters of the U.S., DENC has proposed to limit the space within which the work will be
conducted to the existing easement and adjacent workspace necessary to tie the stabilized banks back to existing
grade. Additionally, construction equipment operating near the river will be limited to that necessary for bank
stabilization activities. Installation of the rock toe protection will be conducted in a dry work space by utilizing a
suitable coffer dam and dewatering the work area along the bank.
The project design incorporated measures to limit the amount of streambank disturbance to less than 150 lf. The
resultant design and proposed impacts are considered the minimum amount necessary to safely provide long-
term stabilization to the eroding streambank and protect the important underground infrastructure.
The project has designed to incorporate appropriate erosion and sediment control practices outlined in the most
recent version of the "North Carolina Erosion and Sedimentation Control Planning and Design Manual” and
approved by NCDENR prior to construction. DENC will hold a pre-construction meeting with the contractor to
review the design and conditions of the applicable permits.
As proposed, the project will comply with applicable conditions of NWP No. 13 and WQC No. 4134. As proposed,
the project will not result in detrimental changes in pre-construction elevation contours or affect dimension,
pattern or profile of the affected stream beyond the proposed stabilization footprint.
Because the project will result in permanent impacts to less than 150 lf of stream bank, and there will be no
wetland impacts, we do not anticipate that purchase of wetland mitigation credit will be required.
Pre-Construction Notification: NWP No. 13/GC 4134 August 4, 2020
Broad River Bank Stabilization Project Page 8
S&ME, Inc.
Closing
By copy of this correspondence and completed PCN, we are requesting your written concurrence with this permit
application. If you have questions or need additional information, please feel free to contact us at 704.523.4726.
Sincerely,
S&ME
Joey Lawler, PWS
Project Manager
Senior Review by Jason Reeves, PE, Principal Engineer
cc. Robert Schwartz, PE – DENC
DWR
mrlslon of Water Resources
Pre -Construction Notification (PCN) Form
April 11, 2020 Ver 3.1
Initial Review
Has this project met the requirements for acceptance in to the review process?*
r Yes
r No
Is this project a public transportation project?*
C Yes r No
Change only if needed.
BIMS # Assigned
20150994
Is a payment required for this project?*
r No payment required
r Fee received
r Fee needed - send electronic notification
Reviewing Office *
Asheville Regional Office - [phone]
Information for Initial Review
1a. Name of project:
Broad River Bank Stabilization
1a. Who is the Primary Contact?*
Joey Lawler
1b. Primary Contact Email:*
[e-mail]
Date Submitted
8/5/2020
Nearest Body of Water
Broad River
Basin
Broad
Water Classification
WS-IV
Site Coordinates
Latitude:
35.276402
A. Processing Information
County (or Counties) where the project is located:
Rutherford
Is this a NCDMS Project
r Yes r No
Longitude:
81.985572
Is this project a public transportation project?*
r Yes r No
1a. Type(s) of approval sought from the Corps:
W Section 404 Permit (wetlands, streams and waters, Clean Water Act)
r Section 10 Permit (navigable waters, tidal waters, Rivers and Harbors Act)
Version#*
5
What amout is owed?*
IT $240.00
r $570.00
Select Project Reviewer*
Amy Annino:eads\amannino
1c. Primary Contact Phone:*
[phone]
L.1
1b. What type(s) of permit(s) do you wish to seek authorization?

W Nationwide Permit (NWP)
r Regional General Permit (RGP)
r Standard (IP)
1c. Has the NWP or GP number been verified by the Corps?
r Yes r No
Nationwide Permit (NWP) Number:
NWP Numbers (for multiple NWPS):
1d. Type(s) of approval sought from the DWR:
W 401 Water Quality Certification - Regular
r Non-404 Jurisdictional General Permit
r Individual Permit
13 - Bank Stabilization
le. Is this notification solely for the record because written approval is not required?
For the record only for DWR 401 Certification:
For the record only for Corps Permit:
F- 401 Water Quality Certification - E)press
r Riparian Buffer Authorization
1f. Is this an after -the -fact permit application?*
r Yes r No
1g. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts?
r Yes r No
1g. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts?
r Yes r No
Acceptance Letter Attachment
1h. Is the project located in any of NC's twenty coastal counties?
r Yes r No
1j. Is the project located in a designated trout watershed?
r Yes r No
B. Applicant Information
1d. Who is applying for the permit?
r Owner W Applicant (other than owner)
le. Is there an Agent/Consultant for this project?*
r Yes r No
2. Owner Information
2a. Name(s) on recorded deed:
Green River Farms, LLC
2b. Deed book and page no.:
DB 827 PG 370
2c. Responsible party:
Dominion Energy North Carolina (easment)
2d.Address
Street Address
220 Operation Way, MC C221
Address tine 2
city
Cayce
Postal / Zip 0ode
29033
2e. Telephone Number:
[phone]
2g. Email Address:*
[e-mail]
State / Rwince / Ifgion
SC
Country
USA
2f. Fax Number:
r- Yes r No
r Yes r No
3. Applicant Information (if different from owner)

3a. Name:
Robert Schwartz
3b. Business Name:
Dominion Energy North Carolina
3c.Address
Street Address
220 Operation Way, MC C221
Address Line 2
City
Cayce
Postal / Zip Code
29033
3d. Telephone Number:
[phone]
3f. Email Address:*
[e-mail]
4. Agent/Consultant (if applicable)
4a. Name:
Joey Lawler
4b. Business Name:
S&ME, Inc.
4c.Address
Street Address
9751 Southern Pine Blvd
Address Une 2
City
Charlotte
Postal / Zip Code
28273
4d. Telephone Number:
[phone]
4f. Email Address:*
[e-mail]
State / Province / Region
SC
Country
USA
3e. Fax Number:
State / Province / Region
NC
Country
USA
4e. Fax Number:
Agent Authorization Letter*
Agent Authorization Form - Broad River_Signed.pdf 242.99KB
C. Project Information and Prior Project History u
1. Project Information
1b. Subdivision name:
(d appropriate)
N/A
1c. Nearest municipality/ town:
Union
2. Project Identification
2a. Property Identification Number:
1506899641
2c. Project Address
Street Address
West of Jim Dobbins Rd
Address Lim 2
City
Union
Postal / Zip Code
28139
3. Surface Waters
2b. Property size:
—1.0 acre
State / Province / legion
NC
Country
USA
3a. Name of the nearest body of water to proposed project:*

Broad River
3b. Water Resources Classification of nearest receiving water:*
WS-IV
3c. What river basin(s) is your project located in?*
Broad
3d. Please provide the 12-digit HUC in which the project is located.
030501050309
4. Project Description and History
4a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this application:*
The project area is located along the Broad River, west of Jim Dobbins Road and east of Ken Miller Road in Rutherford County, NC. More specifically, the site consists of a portion of
DENC's T01/M201 natural gas transmission pipeline easement, adjacent to Rutherford County PIN No. 1506899614. The existing easement is abutted on either side by undeveloped
woodland, and no existing aboveground structures are present. Review of the Rutherfordton South, NC US Geological Survey (USGS) Topographic Map depicts the project area as
forested land. Soils mapped within the project area are limited to Pacolet sandy loam (Typic Kanhapludults) and Buncombe loamy sand. Neither of these soils are classified as hydric.
A new20-inch diameter natural gas transmission pipeline (T01) was installed in the easement in 2017, and the portion of an adjacent, pre-existing 8-inch diameter pipeline (M201) that
was located beneath the river was replaced in 2020. Both T01 and the replacement segment of M201 were installed beneath the river by horizontal directional drill (HDD). The project
area is within the permitted limits of disturbance associated with NCDEQ Project ID: RUTHE-2020-009.
Over the course of performing routine inspections of the easement, and later during installation of the M201 pipeline, areas of active bank erosion were observed along both banks of
the portion of the river within the existing easement.
4b. Have Corps permits or DWR certifications been obtained for this project (including all prior phases) in the past?*
r Yes r No r Unknown
4c. If yes, please give the DWR Certification number or the Corps Action ID (exp. SAW-0000-00000).
SAW-2016-00773 / NCDWR No. 15-0994
Project History Upload
4d. Attach an 8 112 X 11 excerpt from the most recent version of the USGS topographic map indicating the location of the project site. (for DWR)
2 - USGSBroadRiver.pdf
758.36KB
4e. Attach an 8 1/2 X 11 excerpt from the most recent version of the published County NRCS Soil Survey map depicting the project site. (for DWR)
3-SoilsBroadRiver.pdf 592.3KB
4f. List the total estimated acreage of all existing wetlands on the property:
0.0
4g. List the total estimated linear feet of all existing streams on the property:
4h. Explain the purpose of the proposed project:*
The purpose of the project is to repair erosion and provide long term stabilization to banks of the Broad River located within DENC's natural gas transmission pipeline easement.
41. Describe the overall project in detail, including indirect impacts and the type of equipment to be used:*
The bank stabilization will consist of installation of boulder toe protection at the base of the existing banks, followed by re-establishment of a bank full bench and grading to soften the
existing slopes. An aqua barrier or similar coffer dam will first be installed within the river along the toe of the bank to provide a suitably dry work area for the boulder toe installation.
Live staking will be incorporated above the boulder toe. Above the lives takes, the bank will be sloped at a 2HA V grade, and a second bench (upper berm) Will be incorporated to
further soften the slope.
Because of the confined easement width, site grades flatter than 2H:1 V could not be incorporated without significant grading and tree removal outside of the existing easement.
Therefore, re -graded portions of the streambank above the bank full level will be stabilized with Green Armor turf reinforcement matting. Based on geotechnical exploration and slope
stability analysis conducted by S&ME, it was determined that the existing banks consist of alluvium (very loose to loose, poorly graded sand and silt) to a depth of approximately eight
feet. The analysis concluded that safe inclinations without the use of rip -rap could be achieved are 1.75H:1V to 2H:1V, but that turf reinforcement matting should be employed in the
design due to anticipated overland flow and associated erosion potential.
Incorporation of the Green Armor turf matting will provide rapid slope stabilization and will allow integration of the native riparian seed mix Although the matting is synthetic, the material
does not consist of laminated or stitched layers. Rather, its three-dimensional structure will provide an open matrix that will be hydraulically infilled with high performance flexible growth
media to bond the soil and seed and accelerate growth. No material consisting of netting or stitching has been incorporated into the design.
As indicated, only minor grading will be required outside of the existing easement to tie the proposed streambank stabilization grades back into the existing grade. The stabilization
design and associated grading are depicted on the construction drawings that accompany this PCN.
Normal flow and circulation patterns of the Broad River will not be permanently altered as a result of the proposed stabilization project. Following stream bank stabilization, any
temporarily affected areas will be restored to original grades and contours, matted, and seeded with a riparian seed mix
4j. Please upload project drawings for the proposed project.
Construction Drawings.pdf 12.87MB
5. Jurisdictional Determinations
5a. Have the wetlands or streams been delineated on the property or proposed impact areas?*
r Yes
r No
r Unknown
Comments:

5b. If the Corps made a jurisdictional determination, what type of determination was made?*
F Preliminary r Approved F Not Verified F Unknown f N/A
Corps AID Number:
SAW-2016-00773
5c. If 5a is yes, who delineated the jurisdictional areas?
Name (if known): Joey Lawler, PWS
Agency/Consultant Company: S&ME, Inc.
Other:
5d. List the dates of the Corp jurisdiction determination or State determination if a determination was made by the Corps or DWR
The portion of the Broad River located within the project area was previously delineated by S&ME in connection with the T01 B Replacement Project. A Request for Preliminary
Jurisdictional Determination (Pre -JD) package was provided to the USACE on October 14, 2016. Representatives of the USACE (David Broom and Steve Kichefski) and NCDWR (Kevin
Mitchell) visited the project site on November 17, 2016 to approve the original delineation and verify the location/classification of affected features.
The project area was re -assessed by S&ME in April 2020 to confirm the findings of the previous delineation. The site visit confirmed that aside from the Broad River itself, no additional
jurisdictional features were identified within the project area.
5d1. Jurisdictional determination upload
T01 B Replacement Pre -JD Approval.pdf 1.37MB
6. Future Project Plans
6a. Is this a phased project?*
f Yes G No
Are any other NWP(s), regional general permit(s), or individual permits(s) used, or intended to be used, to authorize any part of the proposed project or related activity?
See accompanying cover letter.
D. Proposed Impacts Inventory
1. Impacts Summary
1a. Where are the impacts associated with your project? (check all that apply):
r Wetlands W Streams -tributaries r Buffers
r Open Waters r Pond Construction
3. Stream Impacts
3a. Reason for impact (?) 3b.lmpact type * 3c. Type of impact* name * 3e. Stream Type * 3f. Type of 3g. S. width * �31h. Impact
(?) Jurisdiction* length*
Coffer dam and bank Tem orar Bank Stabilization Broad River Perennial Both SO 75
>1 P Y
stabilization Average (feet) (lir�rfeet)
31. Total jurisdictional ditch impact in square feet
0
31. Total permanent stream impacts: 31. Total temporary stream impacts:
0 75
31. Total stream and ditch impacts:
75
3j. Comments:
The proposed coffer dam will be approAmately 75 LF in length. Appropmately 50 LF of the bank (the portion within the existing easement) will be
subject to the bank stabilization.
E. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing the project:
To minimize impacts to waters of the U.S., DENC has proposed to limit the space within which the work will be conducted to the eAsting easement and
adjacent workspace necessary to tie the stabilized banks back to eAsting grade.
The project design incorporated measures to limit the amount of streambank disturbance to less than 150 If. The resultant design and proposed
impacts are considered the minimum amount necessary to safely provide long-term stabilization to the eroding streambank and protect the important
underground infrastructure.
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques:

Construction equipment operating near the river Will be limited to that necessary for bank stabilization activities. Installation of the rock toe protection
Will be conducted in a dry work space by utilizing a suitable coffer dam and dewatering the work area along the bank.
The project Will incorporate appropriate erosion and sediment control practices outlined in the most recent version of the "North Carolina Erosion and
Sedimentation Control Planning and Design Manual" and approved by NCDENR prior to construction. DENC Will hold a pre -construction meeting With
the contractor to review the design and conditions of the applicable permits.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for impacts to Waters of the U.S. or Waters of the State?
r' Yes r No
2b. If this project DOES NOT require Compensatory Mitigation, explain why:
The project involves less than 150 LF of stream impact.
F. Stormwater Management and Diffuse Flow Plan (required by DWR)
1. Diffuse Flow Plan
1a. Does the project include or is it adjacent to protected riparian buffers identified within one of the NC Riparian Buffer Protection Rules?
r' Yes r No
If no, explain why:
Project is not located Within a watershed subject to NCDWR-regulated riparian buffers.
2. Stormwater Management Plan
2a. Is this a NCDOT project subject to compliance with NCDOT's Individual NPDES permit NCS000250?*
r Yes r No
2b. Does this project meet the requirements for low density projects as defined in 15A NCAC 02H .1003(2)?
r Yes r No
Comments:
WA
G. Supplementary Information
1. Environmental Documentation
1a. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land?*
r Yes r No
2. Violations (DWR Requirement)
2a. Is the site in violation of DWR Water Quality Certification Rules (15A NCAC 2H .0500), Isolated Wetland Rules (15A NCAC 2H .1300), or DWR Surface Water or Wetland Standards or
Riparian Buffer Rules (15A NCAC 2B .0200)? *
r Yes r No
3. Cumulative Impacts (DWR Requirement)
3a. Will this project result in additional development, which could impact nearby downstream water quality?*
r Yes r No
3b. If you answered "no," provide a short narrative description.
The project is a repair/bank stabilization project and is not considered "growth -inducing.
4. Sewage Disposal (DWR Requirement)
4a. Is sewage disposal required by DWR for this project?*
rYes r Nor WA
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or habitat?*
r Yes r No
5b. Have you checked with the USFWS concerning Endangered Species Act impacts?*
r Yes r No
5c. If yes, indicate the USFWS Field Office you have contacted.
Asheville

5d. Is another Federal agency involved?*
r Yes r No r Unknown
5e. Is this a DOT project located within Division's 1-8?
r Yes r No
5f. Will you cut any trees in order to conduct the work in waters of the U.S.?
r Yes r No
5g. Does this project involve bridge maintenance or removal?
r Yes r No
5h. Does this project involve the construction/installation of a wind turbine(s)?*
r Yes r No
5i. Does this project involve (1) blasting, and/or (2) other percussive activities that will be conducted by machines, such as jackhammers, mechanized pile drivers, etc.?
r Yes r No
5j. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat?
See accompanying cover letter
Consultation Documentation Upload
project _report _broad_river_bank _stabilizat_25899_25899.pdf 752.72KB
Species List_ Asheville Ecological Services Field Office.pdf 383.45KB
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as an Essential Fish Habitat?*
r Yes r No
6b. What data sources did you use to determine whether your site would impact an Essential Fish Habitat?*
https://www. fisheries. noaa. gov/resou rce/ma p/esse ntia I -fish -habitat -ma ppe r
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal governments have designated as having historic or cultural preservation status?*
r Yes r No
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
See accompanying cover letter.
7c. Historic or Prehistoric Information Upload
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain?*
r Yes r No
8b. If yes, explain how project meets FEMA requirements:
The activity will require approval by Rutherford County. An application for the floodplain encroachment permit has been submitted.
8c. What source(s) did you use to make the floodplain determination?*
hftps://flood.nG.gov/ncflood/
Miscellaneous
Comments
Miscellaneous attachments not previously requested.
1 - VicinityBroadRiver.pdf 391.19KB
Site Photos.pdf 446.76KB
Cover Letter.pdf 182.37KB
Signature
*
V By checking the box and signing below, I certify that:
• I have given true, accurate, and complete information on this form;
• I agree that submission of this PCN form is a "transaction" subject to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
• I agree to conduct this transaction by electronic means pursuant to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
• I understand that an electronic signature has the same legal effect and can be enforced in the same way as a written signature; AND
• I intend to electronically sign and submit the PCN form.
Full Name

Joey Lawler
Signature
Date
8/5/2020

AGENT AUTHORIZATION AND RIGHT OF ENTRY FORM
Date: 04.06.2020
Project Information
S&ME Project Name: Broad River Bank Stabilization
Type of Project:Bank Stabilizaton Project
Location:Rutherfordton, Rutherford and Polk Counties, NC
Property Owner/Authorizing Entity Information
Business Name:Dominion Energy North Carolina
Mailing Address:220 Operations Way720
City, State, Zip Code: Cayce, SC 29033
Telephone No.803.217.7112
Contact:Robert Schwartz, PE
Agent Information
Business Name:S&ME, Inc.
Street Address:9751 Southern Pine Blvd.
City, State, Zip Code: Charlotte, NC 28273
Telephone No.704.523.4726
Contact:Joey Lawler, PWS
Authorization:I ___________________________________________ , on behalf of
(Contact Signature)
________________________________________ ,
(Name of Landowner or Authorizing Entity﴿
hereby authorize S&ME to act as agent with the U.S. Army Corps of Engineers (Corps)/NC
Division of Water Resources (DWR) in connection securing the necessary Section 404/401 permits
associated with the above-mentioned project.
I am also authorized to permit representatives of the Wilmington District Corps/DWR to enter
properties within the project area for the purposes of conducting on-site investigations and
issuing a determination associated with Waters of the U.S. subject to Federal jurisdiction under
Section 404 of the Clean Water Act and/ or Section 10 of the Rivers and Harbors Act of 1889.
Dominion Energy North Carolina
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RE FERENCE:GIS BASE L AYERS WERE OBTA IN ED F ROM ESRI. THIS MA P IS FOR IN FORMATI ONALPURPOSES ONLY. AL L FEATURE LOCATIONS DI SPL AYED A RE APPROXI MATED. THEY ARENOT B ASED ON CIVIL SURVEY IN F ORMATION, UNLESS STATED OTHERWI SE.^`PROJECT LOCATIO N
SCALE:
DATE:
PROJECT NUMBER
FIGURE NO.
11 " = 5,000 '
4-3-20
7335-20-036BROAD RIVER BANK STABILI ZAT IONRUTHERFORDTON, NCDrawing Path: C:\Users\KWallace\Desktop\BROADRIVER\1 - VicinityBroadRiver.mxd plotted by kwallace 04-03-2020SITE VICINITY E XHIBIT
³
0 5,000 10,000
(FE ET)
^`
^`PROJECT LOCATIO N
SCALE:
DATE:
PROJECT NUMBER
FIGURE NO.
21 " = 1,000 '
4-3-20
7335-20-036BROAD RIVER BANK STABILI ZAT IONRUTHERFORDTON, NCDrawing Path: C:\Users\KWallace\Desktop\BROADRIVER\2 - USGSBroadRiver.mxd plotted by kwallace 04-03-20200 1,000 2,000(FE ET)
USGS T OP OGRAPHIC MAP EXHIBIT
³
RE FERENCE:GIS BASE L AYERS WERE OBTA IN ED F ROM ESRI. THIS MA P IS FOR IN FORMATI ONALPURPOSES ONLY. AL L FEATURE LOCATIONS DI SPL AYED A RE APPROXI MATED. THEY ARENOT B ASED ON CIVIL SURVEY IN F ORMATION, UNLESS STATED OTHERWI SE.
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Ma D2
MaC2
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MaC2
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ToA
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Rn E ^`PROJECT LOCATIO N
SCALE:
DATE:
PROJECT NUMBER
FIGURE NO.
31 " = 300 '
4-3-20
7335-20-036BROAD RIVER BANK STABILI ZAT IONRUTHERFORDTON, NCDrawing Path: C:\Users\KWallace\Desktop\BROADRIVER\3 -SoilsBroadRiver.mxd plotted by kwallace 04-03-20200 300 600(FE ET)
SOILS EXHIBIT
³
RE FERENCE:GIS BASE L AYERS WERE OBTA IN ED F ROM ESRI. THIS MA P IS FOR IN FORMATI ONALPURPOSES ONLY. AL L FEATURE LOCATIONS DI SPL AYED A RE APPROXI MATED. THEY ARENOT B ASED ON CIVIL SURVEY IN F ORMATION, UNLESS STATED OTHERWI SE.
PHOTOGRAPH 1
VIEWING DIRECTION:W
DESCRIPTION/COMMENT: View of
erosional area within ROW on left
bank.
PHOTOGRAPH 2
VIEWING DIRECTION:S
DESCRIPTION/COMMENT: View of
left bank facing downstream.
1
SITE PHOTOGRAPHS
DENC Broad River Bank
Stabilization
Rutherfordton, NC
7335-20-036
PHOTOGRAPH 3
VIEWING DIRECTION: NW
DESCRIPTION/COMMENT: View of
erosional area on far (right) bank.
PHOTOGRAPH 4
VIEWING DIRECTION: S
DESCRIPTION/COMMENT: View of
actively eroding area on left bank.
SITE PHOTOGRAPHS
DENC Broad River Bank
Stabilization
Rutherfordton, NC
7335-20-036
2
PHOTOGRAPH 5
VIEWING DIRECTION: S
DESCRIPTION/COMMENT: Actively
eroding area on left bank.
PHOTOGRAPH 6
VIEWING DIRECTION:SW
DESCRIPTION/COMMENT: View of
towards right bank and area of
active erosion.
3
SITE PHOTOGRAPHS
DENC Broad River Bank
Stabilization
Rutherfordton, NC
7335-20-036
NCNHDE-12567
July 28, 2020
Joey Lawler
S&ME
9751 Southern Pine Blvd
Charlotte, NC 29273
RE: Broad River Bank Stabilization; 7335-20-036
Dear Joey Lawler:
The North Carolina Natural Heritage Program (NCNHP) appreciates the opportunity to provide
information about natural heritage resources for the project referenced above.
A query of the NCNHP database indicates that there are records for rare species, important natural
communities, natural areas, and/or conservation/managed areas within the proposed project
boundary. These results are presented in the attached ‘Documented Occurrences’ tables and map.
The attached ‘Potential Occurrences’ table summarizes rare species and natural communities that
have been documented within a one-mile radius of the property boundary. The proximity of these
records suggests that these natural heritage elements may potentially be present in the project area
if suitable habitat exists. Tables of natural areas and conservation/managed areas within a one-mile
radius of the project area, if any, are also included in this report.
If a Federally-listed species is documented within the project area or indicated within a one-mile
radius of the project area, the NCNHP recommends contacting the US Fish and Wildlife Service
(USFWS) for guidance. Contact information for USFWS offices in North Carolina is found here:
https://www.fws.gov/offices/Directory/ListOffices.cfm?statecode=37.
Please note that natural heritage element data are maintained for the purposes of conservation
planning, project review, and scientific research, and are not intended for use as the primary criteria
for regulatory decisions. Information provided by the NCNHP database may not be published
without prior written notification to the NCNHP, and the NCNHP must be credited as an information
source in these publications. Maps of NCNHP data may not be redistributed without permission.
Also please note that the NC Natural Heritage Program may follow this letter with additional
correspondence if a Dedicated Nature Preserve, Registered Heritage Area, Clean Water
Management Trust Fund easement, or an occurrence of a Federally-listed species is documented
near the project area.
If you have questions regarding the information provided in this letter or need additional assistance,
please contact Rodney A. Butler at [e-mail] or 919-707-8603.
Sincerely,
NC Natural Heritage Program
Natural Heritage Element Occurrences, Natural Areas, and Managed Areas Intersecting the Project Area
Broad River Bank Stabilization
Project No. 7335-20-036
July 28, 2020
NCNHDE-12567
Element Occurrences Documented Within Project Area
Taxonomic
Group
EO ID Scientific Name Common Name Last
Observation
Date
Element
Occurrence
Rank
Accuracy Federal
Status
State
Status
Global
Rank
State
Rank
Crustacean 31034 Cambarus johni Carolina Foothills
Crayfish
2019-10-08 E 3-Medium ---Significantly
Rare
G3 S3
Freshwater Fish 32469 Etheostoma
thalassinum
Seagreen Darter 2017-08-08 E 3-Medium ---Significantly
Rare
G4 S3
No Natural Areas are Documented within the Project Area
No Managed Areas Documented within the Project Area
Definitions and an explanation of status designations and codes can be found at https://ncnhde.natureserve.org/help. Data query generated on July 28, 2020; source: NCNHP, Q3 July 2020. Please
resubmit your information request if more than one year elapses before project initiation as new information is continually added to the NCNHP database.
Page 2 of 4
Natural Heritage Element Occurrences, Natural Areas, and Managed Areas Within a One-mile Radius of the Project Area
Broad River Bank Stabilization
Project No. 7335-20-036
July 28, 2020
NCNHDE-12567
Element Occurrences Documented Within a One-mile Radius of the Project Area
Taxonomic
Group
EO ID Scientific Name Common Name Last
Observation
Date
Element
Occurrence
Rank
Accuracy Federal
Status
State
Status
Global
Rank
State
Rank
Crustacean 31034 Cambarus johni Carolina Foothills
Crayfish
2019-10-08 E 3-Medium ---Significantly
Rare
G3 S3
Freshwater Fish 32469 Etheostoma
thalassinum
Seagreen Darter 2017-08-08 E 3-Medium ---Significantly
Rare
G4 S3
Vascular Plant 23935 Hackelia virginiana Virginia Stickseed 1968-Pre H 5-Very
Low
---Significantly
Rare
Peripheral
G5 S2
No Natural Areas are Documented Within a One-mile Radius of the Project Area
No Managed Areas are Documented Within a One-mile Radius of the Project Area
Definitions and an explanation of status designations and codes can be found at https://ncnhde.natureserve.org/help. Data query generated on July 28, 2020; source: NCNHP, Q3 July 2020. Please
resubmit your information request if more than one year elapses before project initiation as new information is continually added to the NCNHP database.
Page 3 of 4
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Page 4 of 4
July 28, 2020
United States Department of the Interior
FISH AND WILDLIFE SERVICE
Asheville Ecological Services Field Office
160 Zillicoa Street
Asheville, NC 28801-1082
Phone: [phone] Fax: [phone]
http://www.fws.gov/nc-es/es/countyfr.html
In Reply Refer To:
Consultation Code: 04EN1000-2020-SLI-0787
Event Code: 04EN1000-2020-E-01848
Project Name: Broad River Bank Stabilization

Subject:List of threatened and endangered species that may occur in your proposed project
location, and/or may be affected by your proposed project
To Whom It May Concern:
The attached species list identifies threatened, endangered, proposed and candidate species, as
well as proposed and final designated critical habitat, that may occur within the boundary of your
proposed project and/or may be affected by your proposed project. Although not required by
section 7, many agencies request species lists to start the informal consultation process and begin
their fulfillment of the requirements under section 7(c) of the Endangered Species Act (Act) of
1973, as amended (16 U.S.C. 1531 et seq.).
This list, along with other helpful resources, is also available on the U.S. Fish and Wildlife
Service (Service) Asheville Field Office's (AFO) website: https://www.fws.gov/raleigh/species/
cntylist/nc_counties.html. The AFO website list includes “species of concern” species that could
potentially be placed on the federal list of threatened and endangered species in the future. Also
available are:
Design and Construction Recommendations
https://www.fws.gov/asheville/htmls/project_review/Recommendations.html
Optimal Survey Times for Federally Listed Plants
https://www.fws.gov/nc-es/plant/plant_survey.html
Northern long-eared bat Guidance
https://www.fws.gov/asheville/htmls/project_review/NLEB_in_WNC.html
Predictive Habitat Model for Aquatic Species
https://www.fws.gov/asheville/htmls/Maxent/Maxent.html
07/28/2020 Event Code: 04EN1000-2020-E-01848   2

New information based on updated surveys, changes in the abundance and distribution of
species, changed habitat conditions, or other factors could require modifications of these lists.
Please note that under 50 CFR 402.12(e) of the regulations implementing section 7 of the Act,
the accuracy of the species lists should be verified after 90 days. This verification can be
completed formally or informally as desired. The Service recommends that verification be
completed by visiting the ECOS-IPaC website or the AFO website (the AFO website dates each
county list with the day of the most recent update/change) at regular intervals during project
planning and implementation for updates to species lists and information. An updated list may be
requested through the ECOS-IPaC system by completing the same process used to receive the
enclosed list or by going to the AFO website.
The purpose of the Act is to provide a means whereby threatened and endangered species and the
ecosystems upon which they depend may be conserved. Under sections 7(a)(1) and 7(a)(2) of the
Act and its implementing regulations (50 CFR 402 et seq.), Federal agencies are required to
utilize their authorities to carry out programs for the conservation of threatened and endangered
species and to determine whether projects may affect threatened and endangered species and/or
designated critical habitat.
A Biological Assessment is required for construction projects (or other undertakings having
similar physical impacts) that are major Federal actions significantly affecting the quality of the
human environment as defined in the National Environmental Policy Act (42 U.S.C. 4332(2)
(c)). For projects other than major construction activities, the Service suggests that a Biological
Evaluation similar to a Biological Assessment be prepared to determine whether the project may
affect listed or proposed species and/or designated or proposed critical habitat. Recommended
contents of a Biological Assessment are described at 50 CFR 402.12 and on our office's website
at https://www.fws.gov/asheville/htmls/project_review/assessment_guidance.html.
If a Federal agency (or their non-federal representative) determines, based on the Biological
Assessment or Biological Evaluation, that listed species and/or designated critical habitat may be
affected by the proposed project, the agency is required to consult with the Service pursuant to
50 CFR 402. In addition, the Service recommends that candidate species, proposed species, and
proposed critical habitat be addressed within the consultation. More information on the
regulations and procedures for section 7 consultation, including the role of permit or license
applicants, can be found in the "Endangered Species Consultation Handbook" at: http://
www.fws.gov/endangered/esa-library/pdf/TOC-GLOS.PDF.
Though the bald eagle is no longer protected under the Endangered Species Act, please be aware
that bald and golden eagles are protected under the Bald and Golden Eagle Protection Act (16
U.S.C. 668 et seq.), and projects affecting these species may require additional consultation (see
https://www.fws.gov/southeast/our-services/permits/eagles/). Wind energy projects should follow
the wind energy guidelines (http://www.fws.gov/windenergy/) for minimizing impacts to
migratory birds (including bald and golden eagles) and bats.
Guidance for minimizing impacts to migratory birds for projects including communications
towers (e.g., cellular, digital television, radio, and emergency broadcast) can be found at: http://
www.fws.gov/migratorybirds/CurrentBirdIssues/Hazards/towers/towers.htm;
07/28/2020 Event Code: 04EN1000-2020-E-01848   3

▪
▪
▪
http://www.towerkill.com; and http://www.fws.gov/migratorybirds/CurrentBirdIssues/Hazards/
towers/comtow.html.
We appreciate your concern for threatened and endangered species. The Service encourages
Federal agencies to include conservation of threatened and endangered species into their project
planning to further the purposes of the Act. Please include the Consultation Tracking Number in
the header of this letter with any request for consultation or correspondence about your project
that you submit to our office.
Attachment(s):
Official Species List
Migratory Birds
Wetlands
07/28/2020 Event Code: 04EN1000-2020-E-01848   1

Official Species List
This list is provided pursuant to Section 7 of the Endangered Species Act, and fulfills the
requirement for Federal agencies to "request of the Secretary of the Interior information whether
any species which is listed or proposed to be listed may be present in the area of a proposed
action".
This species list is provided by:
Asheville Ecological Services Field Office
160 Zillicoa Street
Asheville, NC 28801-1082
[phone]
07/28/2020 Event Code: 04EN1000-2020-E-01848   2

Project Summary
Consultation Code:04EN1000-2020-SLI-0787
Event Code:04EN1000-2020-E-01848
Project Name:Broad River Bank Stabilization
Project Type:LAND - RESTORATION / ENHANCEMENT
Project Description:Repair/stabilize eroding riverbanks
Project Location:
Approximate location of the project can be viewed in Google Maps: https://
www.google.com/maps/place/35.27645577277646N81.9856135026499W
Counties:Rutherford, NC
07/28/2020 Event Code: 04EN1000-2020-E-01848   3

1.
Endangered Species Act Species
There is a total of 7 threatened, endangered, or candidate species on this species list.
Species on this list should be considered in an effects analysis for your project and could include
species that exist in another geographic area. For example, certain fish may appear on the species
list because a project could affect downstream species.
IPaC does not display listed species or critical habitats under the sole jurisdiction of NOAA
Fisheries , as USFWS does not have the authority to speak on behalf of NOAA and the
Department of Commerce.
See the "Critical habitats" section below for those critical habitats that lie wholly or partially
within your project area under this office's jurisdiction. Please contact the designated FWS office
if you have questions.
NOAA Fisheries, also known as the National Marine Fisheries Service (NMFS), is an
office of the National Oceanic and Atmospheric Administration within the Department of
Commerce.
Mammals
NAME STATUS
Indiana Bat Myotis sodalis
There is final critical habitat for this species. Your location is outside the critical habitat.
Species profile: https://ecos.fws.gov/ecp/species/5949
Endangered
Northern Long-eared Bat Myotis septentrionalis
No critical habitat has been designated for this species.
Species profile: https://ecos.fws.gov/ecp/species/9045
Threatened
Reptiles
NAME STATUS
Bog Turtle Clemmys muhlenbergii
Population: U.S.A. (GA, NC, SC, TN, VA)
No critical habitat has been designated for this species.
Species profile: https://ecos.fws.gov/ecp/species/6962
Similarity of
Appearance
(Threatened)
1
07/28/2020 Event Code: 04EN1000-2020-E-01848   4

Flowering Plants
NAME STATUS
Dwarf-flowered Heartleaf Hexastylis naniflora
No critical habitat has been designated for this species.
Species profile: https://ecos.fws.gov/ecp/species/2458
Threatened
Small Whorled Pogonia Isotria medeoloides
No critical habitat has been designated for this species.
Species profile: https://ecos.fws.gov/ecp/species/1890
Threatened
White Irisette Sisyrinchium dichotomum
No critical habitat has been designated for this species.
Species profile: https://ecos.fws.gov/ecp/species/8097
Endangered
Lichens
NAME STATUS
Rock Gnome Lichen Gymnoderma lineare
No critical habitat has been designated for this species.
Species profile: https://ecos.fws.gov/ecp/species/3933
Endangered
Critical habitats
THERE ARE NO CRITICAL HABITATS WITHIN YOUR PROJECT AREA UNDER THIS OFFICE'S
JURISDICTION.
07/28/2020 Event Code: 04EN1000-2020-E-01848   1

1.
2.
3.
Migratory Birds
Certain birds are protected under the Migratory Bird Treaty Act and the Bald and Golden Eagle
Protection Act .
Any person or organization who plans or conducts activities that may result in impacts to
migratory birds, eagles, and their habitats should follow appropriate regulations and consider
implementing appropriate conservation measures, as described below.
The Migratory Birds Treaty Act of 1918.
The Bald and Golden Eagle Protection Act of 1940.
50 C.F.R. Sec. 10.12 and 16 U.S.C. Sec. 668(a)
The birds listed below are birds of particular concern either because they occur on the USFWS
Birds of Conservation Concern (BCC) list or warrant special attention in your project location.
To learn more about the levels of concern for birds on your list and how this list is generated, see
the FAQ below. This is not a list of every bird you may find in this location, nor a guarantee that
every bird on this list will be found in your project area. To see exact locations of where birders
and the general public have sighted birds in and around your project area, visit the E-bird data
mapping tool (Tip: enter your location, desired date range and a species on your list). For
projects that occur off the Atlantic Coast, additional maps and models detailing the relative
occurrence and abundance of bird species on your list are available. Links to additional
information about Atlantic Coast birds, and other important information about your migratory
bird list, including how to properly interpret and use your migratory bird report, can be found
below.
For guidance on when to schedule activities or implement avoidance and minimization measures
to reduce impacts to migratory birds on your list, click on the PROBABILITY OF PRESENCE
SUMMARY at the top of your list to see when these birds are most likely to be present and
breeding in your project area.
NAME BREEDING SEASON
Red-headed Woodpecker Melanerpes erythrocephalus
This is a Bird of Conservation Concern (BCC) throughout its range in the
continental USA and Alaska.
Breeds May 10 to Sep 10
Probability Of Presence Summary
The graphs below provide our best understanding of when birds of concern are most likely to be
present in your project area. This information can be used to tailor and schedule your project
activities to avoid or minimize impacts to birds. Please make sure you read and understand the
1
2
07/28/2020 Event Code: 04EN1000-2020-E-01848   2

1.
2.
3.
FAQ “Proper Interpretation and Use of Your Migratory Bird Report” before using or attempting
to interpret this report.
Probability of Presence ()
Each green bar represents the bird's relative probability of presence in the 10km grid cell(s) your
project overlaps during a particular week of the year. (A year is represented as 12 4-week
months.) A taller bar indicates a higher probability of species presence. The survey effort (see
below) can be used to establish a level of confidence in the presence score. One can have higher
confidence in the presence score if the corresponding survey effort is also high.
How is the probability of presence score calculated? The calculation is done in three steps:
The probability of presence for each week is calculated as the number of survey events in
the week where the species was detected divided by the total number of survey events for
that week. For example, if in week 12 there were 20 survey events and the Spotted Towhee
was found in 5 of them, the probability of presence of the Spotted Towhee in week 12 is
0.25.
To properly present the pattern of presence across the year, the relative probability of
presence is calculated. This is the probability of presence divided by the maximum
probability of presence across all weeks. For example, imagine the probability of presence
in week 20 for the Spotted Towhee is 0.05, and that the probability of presence at week 12
(0.25) is the maximum of any week of the year. The relative probability of presence on
week 12 is 0.25/0.25 = 1; at week 20 it is 0.05/0.25 = 0.2.
The relative probability of presence calculated in the previous step undergoes a statistical
conversion so that all possible values fall between 0 and 10, inclusive. This is the
probability of presence score.
Breeding Season ()
Yellow bars denote a very liberal estimate of the time-frame inside which the bird breeds across
its entire range. If there are no yellow bars shown for a bird, it does not breed in your project
area.
Survey Effort ()
Vertical black lines superimposed on probability of presence bars indicate the number of surveys
performed for that species in the 10km grid cell(s) your project area overlaps. The number of
surveys is expressed as a range, for example, 33 to 64 surveys.
No Data ()
A week is marked as having no data if there were no survey events for that week.
Survey Timeframe
Surveys from only the last 10 years are used in order to ensure delivery of currently relevant
information. The exception to this is areas off the Atlantic coast, where bird returns are based on
all years of available data, since data in these areas is currently much more sparse.
07/28/2020 Event Code: 04EN1000-2020-E-01848   3

▪
▪
▪
no data survey effort breeding season probability of presence
SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Red-headed
Woodpecker
BCC Rangewide (CON)
Additional information can be found using the following links:
Birds of Conservation Concern http://www.fws.gov/birds/management/managed-species/
birds-of-conservation-concern.php
Measures for avoiding and minimizing impacts to birds http://www.fws.gov/birds/
management/project-assessment-tools-and-guidance/
conservation-measures.php
Nationwide conservation measures for birds http://www.fws.gov/migratorybirds/pdf/
management/nationwidestandardconservationmeasures.pdf
Migratory Birds FAQ
Tell me more about conservation measures I can implement to avoid or minimize impacts
to migratory birds.
Nationwide Conservation Measures describes measures that can help avoid and minimize
impacts to all birds at any location year round. Implementation of these measures is particularly
important when birds are most likely to occur in the project area. When birds may be breeding in
the area, identifying the locations of any active nests and avoiding their destruction is a very
helpful impact minimization measure. To see when birds are most likely to occur and be breeding
in your project area, view the Probability of Presence Summary. Additional measures and/or
permits may be advisable depending on the type of activity you are conducting and the type of
infrastructure or bird species present on your project site.
What does IPaC use to generate the migratory birds potentially occurring in my specified
location?
The Migratory Bird Resource List is comprised of USFWS Birds of Conservation Concern
(BCC) and other species that may warrant special attention in your project location.
The migratory bird list generated for your project is derived from data provided by the Avian
Knowledge Network (AKN). The AKN data is based on a growing collection of survey, banding,
and citizen science datasets and is queried and filtered to return a list of those birds reported as
occurring in the 10km grid cell(s) which your project intersects, and that have been identified as
warranting special attention because they are a BCC species in that area, an eagle (Eagle Act
requirements may apply), or a species that has a particular vulnerability to offshore activities or
development.
07/28/2020 Event Code: 04EN1000-2020-E-01848   4

1.
2.
3.
Again, the Migratory Bird Resource list includes only a subset of birds that may occur in your
project area. It is not representative of all birds that may occur in your project area. To get a list
of all birds potentially present in your project area, please visit the AKN Phenology Tool.
What does IPaC use to generate the probability of presence graphs for the migratory birds
potentially occurring in my specified location?
The probability of presence graphs associated with your migratory bird list are based on data
provided by the Avian Knowledge Network (AKN). This data is derived from a growing
collection of survey, banding, and citizen science datasets .
Probability of presence data is continuously being updated as new and better information
becomes available. To learn more about how the probability of presence graphs are produced and
how to interpret them, go the Probability of Presence Summary and then click on the "Tell me
about these graphs" link.
How do I know if a bird is breeding, wintering, migrating or present year-round in my
project area?
To see what part of a particular bird's range your project area falls within (i.e. breeding,
wintering, migrating or year-round), you may refer to the following resources: The Cornell Lab
of Ornithology All About Birds Bird Guide, or (if you are unsuccessful in locating the bird of
interest there), the Cornell Lab of Ornithology Neotropical Birds guide. If a bird on your
migratory bird species list has a breeding season associated with it, if that bird does occur in your
project area, there may be nests present at some point within the timeframe specified. If "Breeds
elsewhere" is indicated, then the bird likely does not breed in your project area.
What are the levels of concern for migratory birds?
Migratory birds delivered through IPaC fall into the following distinct categories of concern:
"BCC Rangewide" birds are Birds of Conservation Concern (BCC) that are of concern
throughout their range anywhere within the USA (including Hawaii, the Pacific Islands,
Puerto Rico, and the Virgin Islands);
"BCC - BCR" birds are BCCs that are of concern only in particular Bird Conservation
Regions (BCRs) in the continental USA; and
"Non-BCC - Vulnerable" birds are not BCC species in your project area, but appear on
your list either because of the Eagle Act requirements (for eagles) or (for non-eagles)
potential susceptibilities in offshore areas from certain types of development or activities
(e.g. offshore energy development or longline fishing).
Although it is important to try to avoid and minimize impacts to all birds, efforts should be made,
in particular, to avoid and minimize impacts to the birds on this list, especially eagles and BCC
species of rangewide concern. For more information on conservation measures you can
implement to help avoid and minimize migratory bird impacts and requirements for eagles,
please see the FAQs for these topics.
Details about birds that are potentially affected by offshore projects
07/28/2020 Event Code: 04EN1000-2020-E-01848   5

For additional details about the relative occurrence and abundance of both individual bird species
and groups of bird species within your project area off the Atlantic Coast, please visit the
Northeast Ocean Data Portal. The Portal also offers data and information about other taxa besides
birds that may be helpful to you in your project review. Alternately, you may download the bird
model results files underlying the portal maps through the NOAA NCCOS Integrative Statistical
Modeling and Predictive Mapping of Marine Bird Distributions and Abundance on the Atlantic
Outer Continental Shelf project webpage.
Bird tracking data can also provide additional details about occurrence and habitat use
throughout the year, including migration. Models relying on survey data may not include this
information. For additional information on marine bird tracking data, see the Diving Bird Study
and the nanotag studies or contact Caleb Spiegel or Pam Loring.
What if I have eagles on my list?
If your project has the potential to disturb or kill eagles, you may need to obtain a permit to avoid
violating the Eagle Act should such impacts occur.
Proper Interpretation and Use of Your Migratory Bird Report
The migratory bird list generated is not a list of all birds in your project area, only a subset of
birds of priority concern. To learn more about how your list is generated, and see options for
identifying what other birds may be in your project area, please see the FAQ “What does IPaC
use to generate the migratory birds potentially occurring in my specified location”. Please be
aware this report provides the “probability of presence” of birds within the 10 km grid cell(s) that
overlap your project; not your exact project footprint. On the graphs provided, please also look
carefully at the survey effort (indicated by the black vertical bar) and for the existence of the “no
data” indicator (a red horizontal bar). A high survey effort is the key component. If the survey
effort is high, then the probability of presence score can be viewed as more dependable. In
contrast, a low survey effort bar or no data bar means a lack of data and, therefore, a lack of
certainty about presence of the species. This list is not perfect; it is simply a starting point for
identifying what birds of concern have the potential to be in your project area, when they might
be there, and if they might be breeding (which means nests might be present). The list helps you
know what to look for to confirm presence, and helps guide you in knowing when to implement
conservation measures to avoid or minimize potential impacts from your project activities,
should presence be confirmed. To learn more about conservation measures, visit the FAQ “Tell
me about conservation measures I can implement to avoid or minimize impacts to migratory
birds” at the bottom of your migratory bird trust resources page.
07/28/2020 Event Code: 04EN1000-2020-E-01848   1

▪
Wetlands
Impacts to NWI wetlands and other aquatic habitats may be subject to regulation under Section
404 of the Clean Water Act, or other State/Federal statutes.
For more information please contact the Regulatory Program of the local U.S. Army Corps of
Engineers District.
Please note that the NWI data being shown may be out of date. We are currently working to
update our NWI data set. We recommend you verify these results with a site visit to determine
the actual extent of wetlands on site.
RIVERINE
R2UBH
FLOODPLAIN DEVELOPMENT PERMIT APPLICATION
BROAD RIVER
BANK STABILIZATION PROJECT
RUTHERFORD COUNTY, NORTH CAROLINA
JULY 29, 2020
PREPARED BY
9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
PREPARED FOR
220 OPERATION WAY
CAYCE, SC 29033
REFERENCE: 2019 MICROSOFT BING MAPS REFERENCE: 2019 MICROSOFT BING MAPS
VICINITY MAP SITE LOCATION
SCALE: 1" = 5,000'SCALE: 1" = 2,000'
PROJECT LOCATION
PROJECT LOCATION
N N
CALLORCLIC K 811BEFO
R
E
Y
OUDIGSAF
E
DIGGING P A R TNERR
DRAWINGS
NUMBER TITLE
0 COVER
1 OVERALL SITE
2 INSET (1 OF 1)
3 CROSS SECTIONS
4 DETAILS (1 OF 4)
5 DETAILS (2 OF 4)
6 DETAILS (3 OF 4)
7 DETAILS (4 OF 4)
SITE DATA
PROJECT LOCATION:
PROJECT ADDRESS:JIM DOBBINS ROAD
CITY OR TOWNSHP:UNION
COUNTY:RUTHERFORD
STATE:NORTH CAROLINA
ZIP CODE:28139
LATITUDE:35°16'35.05"N (35.2764°)
LONGITUDE:81°59'7.91"W (-81.9855°)
PROJECT SCOPE:
THE PROPOSED PROJECT IS FOR THE BANK STABILIZATION OF A SEGMENT OF THE BROAD RIVER.
THE PROJECT AREA IS LOCATED WITHIN AN EXISTING NATURAL GAS EASEMENT OWNED BY
DOMINION ENERGY NORTH CAROLINA, BETWEEN KEN MILLER ROAD AND JIM DOBBINS ROAD,
RUTHERFORD COUNTY, NORTH CAROLINA.
FLOODPLAIN ENCROACHMENT NOTES:
1. ROCK TOE STABILIZATION WILL BE INSTALLED IN LOCATIONS ALONG THE RIVER BANKS AS
SHOWN ON THE PLAN VIEW DRAWINGS.
2. EXISTING FEATURES AND CADASTRAL LIMITS PROVIDED BY PROFESSIONAL PROPERTY
SURVEYORS, INC., DATED 04/21/2020 & 05/05/2020.
3. EROSION & SEDIMENTATION CONTROL MEASURES, INCLUDING RE-VEGETATION, SHALL BE
UTILIZED PER NC DEPARTMENT OF ENVIRONMENTAL QUALITY-LAND QUALITY SECTION
REGULATIONS.
4. TEMPORARY WATER-FILLED BARRIERS SHALL BE UTILIZED DURING CONSTRUCTION IN ORDER
TO PERFORM THE WORK IN THE DRY TO THE BEST EXTENT POSSIBLE.
5. BANK STABILIZATION CONSTRUCTION ACTIVITIES SHALL BE CARRIED OUT ON ONE BANK AT A
TIME.
6. IMPACTS TO THE 100-YEAR FLOODPLAIN ARE PERMANENT IN NATURE. THERE WILL BE SOME
REGRADING OF ERODED BANKS TO STABILIZE THE SITE AND MINIMIZE FURTHER EROSION ISSUES.
PROJECT SCHEDULE:
DATE TO BEGIN:SUMMER, 2020
DATE TO END:FALL, 2020
DISTURBANCE:
PROJECT ACREAGE:WITHIN APPROVED PROJECT LIMITS OF NCDEQ
PROJECT ID: RUTHE-2020-009
POST-CONSTRUCTION IMPERVIOUS AREA:N/A
WATERBODY INFORMATION:
RIVER BASIN:BROAD RIVER
WATERSHED:FOREST CITY
RECEIVING WATERBODY:BROAD RIVER
WATERBODY INDEX NUMBER:9-(25.5)
CLASSIFICATION:WS-IV(P)
WATERS OF THE U.S./STATE:JURISDICTIONAL FEATURES NOT DELINEATED
USACOE 404 PERMIT OR
401 CERTIFICATION:
JURISDICTIONAL FEATURES NOT DELINEATED
(IMPACTS ARE ANTICIPATED)
NC NAVIGABLE WATERS (NCNW):PRESENT
FEMA FLOODPLAIN/FLOODWAY IMPACTS:
FEMA MAP NUMBER:3710150600K
FEMA FLOODWAY IMPACTS:N/A
FEMA 100-YEAR FLOODPLAIN IMPACTS:YES
WATERCOURSE ALTERATION OR RELOCATION:NO
PRIMARY PERMITTEE INFORMATION:
COMPANY:DOMINION ENERGY NORTH CAROLINA
PROJECT NUMBER:--
MAILING ADDRESS:220 OPERATION WAY
CAYCE, SOUTH CAROLINA 29033-3701
TELEPHONE NUMBER:803-271-7112
PRIMARY SITE CONTACT:A. ROBERT SCHWARTZ, P.E.
E-MAIL ADDRESS:[e-mail]
TELEPHONE NUMBER:803-530-7172
PROJECT MANAGER:A. ROBERT SCHWARTZ, P.E.
E-MAIL ADDRESS:[e-mail]
TELEPHONE NUMBER:803-530-7172
CONSULTANT INFORMATION:
ENGINEERING FIRM:S&ME, INC.
PROJECT NUMBER:7335-20-036
MAILING ADDRESS:9751 SOUTHERN PINE BLVD., CHARLOTTE, NC
28273
TELEPHONE NUMBER:704-523-4726
E&SC PLAN PREPARER NAME:LIANE R. MORGAN, P.E.
REGISTERED PROFESSIONAL ENGINEER
NC REGISTRATION NUMBER:37458
COMPANY/FIRM NAME:S&ME, INC.
NC ENG. FIRM LICENSE NUMBER:F-0176
PROJECT MANAGER:LIANE R. MORGAN, P.E.
E-MAIL ADDRESS:[e-mail]
TELEPHONE NUMBER:704-523-4726 x.11652
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FEMAPIN: 1506899614
GREEN RIVER FARM LLC
DB 827 PG 370
PIN: 1517100649
GEER, CECIL L; GEER, MYRA M
DB 803 PG 228
PIN: 1506899614
GREEN RIVER FARM LLC
DB 827 PG 370
PIN: 1516180325
MANNO, JOSEPH
DB 892 PG 315
PIN: 1516180325
MANNO, JOSEPH
DB 892 PG 315
PIN: 1516195820
MANNO, JOSEPH
DB 926 PG 414
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EXISTING MINOR CONTOUR (1-FT.)
EXISTING MAJOR CONTOUR (5-FT.)
EXISTING NATURAL GAS MAIN
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PROPERTY BOUNDARY
100-YEAR FLOODPLAIN
EXISTING GAS EASEMENT
750
TOP OF STREAM BANK
EXISTING HORIZONTAL DIRECTIONAL DRILL
LIMITS OF DISTURBANCE / CONSTRUCTION EASEMENTLOD
TEMPORARY WORKSPACE
TEMPORARY MATTING (NAG SC150BN)
SILT FENCE OUTLET
SILT FENCE OR 12-IN.■■■■
WATER BAR►►►►►►
REINFORCED SILT FENCE
CONSTRUCTION ENTRANCE
EXISTING LEGEND:PROPOSED LEGEND:
ROCK PROTECTION
FEMA FLOODPLAIN IMPACT
FEMA BASE FLOOD ELEVATION
FEMA NON-ENCROACHMENT BOUNDARY
REFERENCE:
1.TOPOGRAPHY SHOWN IS BASED ON NORTH CAROLINA DEPARTMENT OF TRANSPORTATION GIS
CONTOUR DATA DATED 3/11/2019.
2.SURVEY PROVIDED BY PROFESSIONAL PROPERTY SURVEYORS, INC., DATED 4/21/2020 & 5/5/2020.
3.AERIAL IMAGERY IS FROM NC ONE MAP DATA DATED 2019.
PROPOSED MINOR CONTOUR (1-FT.)
PROPOSED MAJOR CONTOUR (5-FT.)750
PERMANENT GREEN ARMOR MATTING
COMPOST FILTER SOCK1818
SCOURER MATTINGDRAWING PATH: N:\Projects\2020\036 Broad River Bank Stabilization\DWG\FDPA\733520036_OVERALL.dwgDRAWING NUMBER
PROJECT NUMBER BYDESCRIPTIONDATENO.CHKAPV9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
[phone]
ENGINEERING FIRM
LICENSE NUMBER: F-0176
FLOODPLAIN DEVELOPMENT PERMIT APPLICATIONBROAD RIVER BANK STABILIZATION PROJECTRUTHERFORD COUNTY, NORTH CAROLINA7335-20-036
1OVERALL SITEN
0LRMELHDRGISSUED FOR PERMITTING & APPROVAL07/29/20200 100 200
PLAN
GRAPHIC SCALE (IN FEET)
1
2
FLOODPLAIN IMPACT AREA
PERMITTED LINMITS OF DISTURBANCE
NCDEQ PROJECT ID: RUTHE-2020-009
SITE ACCESS
7
G A S
FEMA
EXISTING MINOR CONTOUR (1-FT.)
EXISTING MAJOR CONTOUR (5-FT.)
EXISTING NATURAL GAS MAIN
STREAM CENTERLINE
PROPERTY BOUNDARY
100-YEAR FLOODPLAIN
EXISTING GAS EASEMENT
750
TOP OF STREAM BANK
EXISTING HORIZONTAL DIRECTIONAL DRILL
LIMITS OF DISTURBANCE / CONSTRUCTION EASEMENTLOD
TEMPORARY WORKSPACE
TEMPORARY MATTING (NAG SC150BN)
SILT FENCE OUTLET
SILT FENCE OR 12-IN.■■■■
WATER BAR►►►►►►
REINFORCED SILT FENCE
CONSTRUCTION ENTRANCE
EXISTING LEGEND:PROPOSED LEGEND:
ROCK PROTECTION
FEMA FLOODPLAIN IMPACT
FEMA BASE FLOOD ELEVATION
FEMA NON-ENCROACHMENT BOUNDARY
REFERENCE:
1.TOPOGRAPHY SHOWN IS BASED ON NORTH CAROLINA DEPARTMENT OF TRANSPORTATION GIS
CONTOUR DATA DATED 3/11/2019.
2.SURVEY PROVIDED BY PROFESSIONAL PROPERTY SURVEYORS, INC., DATED 4/21/2020 & 5/5/2020.
3.AERIAL IMAGERY IS FROM NC ONE MAP DATA DATED 2019.
PROPOSED MINOR CONTOUR (1-FT.)
PROPOSED MAJOR CONTOUR (5-FT.)750
PERMANENT GREEN ARMOR MATTING
COMPOST FILTER SOCK1818
SCOURER MATTING
LIDAR 2019
SURVEY 2020
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F
EMAFEMAFEMAFEMAFEMAFEMAFEMAPIN: 1506899614
GREEN RIVER FARM LLC
DB 827 PG 370
PIN: 1506899614
GREEN RIVER FARM LLC
DB 827 PG 370
PIN: 1517100649
GEER, CECIL L; GEER, MYRA M
DB 803 PG 228BROAD R
IVER
B.F.E 74
7
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■■■■■■■■■■■■■■■■■■■■■■■
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LOD LODLODLOD
LOD
LOD
LOD
LOD
LOD
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LOD
LODLODLOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLODLOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD
LOD LODLODLOD
LOD
LOD
LOD
LODLOD►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►►0+00
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7207257307207
2
5
7
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7
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5
720725730735181
8
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1818181818181818181818181818 18
DRAWING PATH: N:\Projects\2020\036 Broad River Bank Stabilization\DWG\FDPA\733520036_INSET.dwgDRAWING NUMBER
PROJECT NUMBER BYDESCRIPTIONDATENO.CHKAPV9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
[phone]
ENGINEERING FIRM
LICENSE NUMBER: F-0176
FLOODPLAIN DEVELOPMENT PERMIT APPLICATIONBROAD RIVER BANK STABILIZATION PROJECTRUTHERFORD COUNTY, NORTH CAROLINA7335-20-036
2INSET (1 OF 1)0LRMELHDRGISSUED FOR PERMITTING & APPROVAL07/29/20200 10 20
PLAN
GRAPHIC SCALE (IN FEET)
N
FLOODPLAIN IMPACT: HDD OF BROAD RIVER
PROJECT DESCRIPTION AND NOTES:
THE FLOODPLAIN ENCROACHMENT DEPICTED IS FOR THE DOMINION ENERGY NORTH CAROLINA BROAD RIVER BANK
STABILIZATION PROJECT. THE SITE COMPRISES A MAINTAINED CROSS-COUNTRY NATURAL GAS EASEMENT OWNED BY
DOMINION ENERGY NORTH CAROLINA AND ADJACENT PROPERTIES IN RUTHERFORD COUNTY, NORTH CAROLINA.
CONSTRUCTION ACTIVITIES WITHIN THE FEMA ZONE AE 100-YEAR FLOODPLAIN OF THE BROAD RIVER INCLUDE THE
INSTALLATION OF ROCK TOE STABILIZATION ALONG A SEGMENT OF THE RIVER AS WELL AS GRADING ALONG THE RIVER
BANKS TO REPAIR EXISTING EROSION AND STABILIZE THE BANKS.
THE PROPOSED STABILIZATION PROJECT IS ADJACENT TO RUTHERFORD COUNTY PIN #'s: 1517100649 AND 1506899614.
NO EXISTING STRUCTURES ARE PRESENT AND NO STRUCTURES, BEYOND THE PROPOSED ROCK TOE STABILIZATION
MEASURES, ARE PROPOSED WITHIN THE PROJECT AREA. NO PROPOSED PAVEMENT AREAS, STORAGE AREAS, FILL
MATERIALS, OR DRAINAGE FACILITIES ARE ANTICIPATED. IMPACTS TO THE FLOODPLAIN ARE ANTICIPATED TO BE
PERMANENT IN NATURE. FOLLOWING STREAM BANK STABILIZATION, THE IMPACTED AREA WILL BE MATTED AND
HYDRO-SEEDED WITH A RIPARIAN SEED MIX IN ORDER TO RESTORE AREA TO PRE-CONSTRUCTION VEGETATION.
THE BOUNDARY OF THE FEMA ZONE AE 100-YEAR FLOODPLAIN ARE SHOWN ON THE ABOVE PLAN VIEW. THE
NON-ENCROACHMENT AREA IS PRESENT WITHIN THE PROJECT AREA AND APPROXIMATED BASED ON DATA PROVIDED
IN THE FLOOD INSURANCE STUDY FOR RUTHERFORD COUNTY & THE TOWN OF RUTHERFORDTON DATED 09/03/2009.
THE BASE FLOOD ELEVATION (BFE) WHERE THE TEMPORARY ENCROACHMENT WILL OCCUR IS APPROXIMATELY AT 747'.
BROAD RIVER WILL NOT BE ALTERED OR RELOCATED AS A RESULT OF THE PROPOSED STABILIZATION PROJECT.
THE PROJECT AREA IS WITHIN A PERMITTED LIMITS OF DISTURBANCE ASSOCIATED WITH NCDEQ PROJECT ID:
RUTHE-2020-009. A MODIFICATION TO THAT APPROVED EROSION & SEDIMENT CONTROL PLAN WILL BE SUBMITTED
CONCURRENTLY WITH THIS FLOODPLAIN DEVELOPMENT PERMIT APPLICATION.
EROSION AND SEDIMENTATION CONTROL MEASURES:
A TEMPORARY WATER-FILLED DAM WILL BE UTILIZED ON ONE BANK AT A TIME IN ORDER TO CONDUCT THE WORK IN
THE DRY.
GENERAL NOTES:
1.MATERIALS AND FILL WILL NOT BE STORED IN THE FLOODPLAIN.
2.CHEMICALS WILL NOT BE STORED WITHIN THE FLOODPLAIN.
3.REFUELING WILL NOT BE CONDUCTED WITHIN 100 FEET OF A STREAM OR WETLAND.
ENGINEER'S "NO IMPACT" CERTIFICATION:
THIS IS TO CERTIFY THAT I AM A DULY QUALIFIED ENGINEER, LICENSED TO PRACTICE IN THE STATE OF NORTH CAROLINA. IT IS TO FURTHER CERTIFY THAT THE PROPOSED DOMINION ENERGY
NORTH CAROLINA BROAD RIVER BANK STABILIZATION PROJECT WILL NOT IMPACT THE 100-YEAR FLOOD ELEVATIONS, FLOODWAY ELEVATIONS AND FLOODWAY WIDTHS ON BROAD RIVER AT
PUBLISHED CROSS-SECTIONS IN THE RUTHERFORD COUNTY FLOOD INSURANCE RATE MAP PANEL No. 1506 DATED SPETHEMBER 3, 2008, AND WILL NOT IMPACT THE 100-YEAR FLOOD
ELEVATIONS, FLOODWAY ELEVATIONS AND FLOODWAY WIDTHS AT UNPUBLISHED CROSS-SECTIONS IN THE VICINITY OF THE PROPOSED DEVELOPMENT.
SIGNED BY:
DATE:JULY 29, 2020
PROPOSED 8-IN. DIA. GAS PIPELINE
(INSTALLED VIA HDD)
35,390 SF OF TEMPORARY
FEMA 100-YEAR
FLOODPLAIN IMPACT 50-FT.1
2
FLOODPLAIN IMPACT AREA
SCALE: 1" = 10'
PERMITTED UNDER NCDEQ
PROJECT ID: RUTHE-2020-009
2
4
GREEN ARMOR DETAIL
(TYP.)
1
4
TOE-ROCK RIVER STABILIZATION
(TYP.)
TEMPORARY WATER-FILLED DAM
(OR ENGINEER APPROVED EQUIVALENT)
4
5
COMPOST FILTER SOCK
(TYP.)20-FT.72-FT.20-FT.15-FT.56-FT.
3
5
SILT FENCE
(TYP.)
6
5
WATERBAR
(TYP.)
12-FT. X 16-FT. FLEXIBLE REVETMENT SCOUR TRANSITION MAT
N.A.G. P550 OR ENGINEER APPROVED EQUIVALENT
80-FT.17-FT.37-FT.
7
G A S
FEMA
EXISTING MINOR CONTOUR (1-FT.)
EXISTING MAJOR CONTOUR (5-FT.)
EXISTING NATURAL GAS MAIN
STREAM CENTERLINE
PROPERTY BOUNDARY
100-YEAR FLOODPLAIN
EXISTING GAS EASEMENT
750
TOP OF STREAM BANK
EXISTING HORIZONTAL DIRECTIONAL DRILL
LIMITS OF DISTURBANCE / CONSTRUCTION EASEMENTLOD
TEMPORARY WORKSPACE
TEMPORARY MATTING (NAG SC150BN)
SILT FENCE OUTLET
SILT FENCE OR 12-IN.■■■■
WATER BAR►►►►►►
REINFORCED SILT FENCE
CONSTRUCTION ENTRANCE
EXISTING LEGEND:PROPOSED LEGEND:
ROCK PROTECTION
FEMA FLOODPLAIN IMPACT
FEMA BASE FLOOD ELEVATION
FEMA NON-ENCROACHMENT BOUNDARY
REFERENCE:
1.TOPOGRAPHY SHOWN IS BASED ON NORTH CAROLINA DEPARTMENT OF TRANSPORTATION GIS
CONTOUR DATA DATED 3/11/2019.
2.SURVEY PROVIDED BY PROFESSIONAL PROPERTY SURVEYORS, INC., DATED 4/21/2020 & 5/5/2020.
3.AERIAL IMAGERY IS FROM NC ONE MAP DATA DATED 2019.
PROPOSED MINOR CONTOUR (1-FT.)
PROPOSED MAJOR CONTOUR (5-FT.)750
PERMANENT GREEN ARMOR MATTING
COMPOST FILTER SOCK1818
SCOURER MATTINGELEVATION (IN FEET)ELEVATION (IN FEET)700
710
720
730
740
750
700
710
720
730
740
750
0+00 0+60
0+00 0+20 0+40 0+60 ELEVATION (IN FEET)ELEVATION (IN FEET)700
710
720
730
740
750
700
710
720
730
740
750
0+00 0+70
0+00 0+20 0+40 0+60 0+70
DRAWING PATH: N:\Projects\2020\036 Broad River Bank Stabilization\DWG\FDPA\733520036_SECTION.dwgDRAWING NUMBER
PROJECT NUMBER BYDESCRIPTIONDATENO.CHKAPV9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
[phone]
ENGINEERING FIRM
LICENSE NUMBER: F-0176
FLOODPLAIN DEVELOPMENT PERMIT APPLICATIONBROAD RIVER BANK STABILIZATION PROJECTRUTHERFORD COUNTY, NORTH CAROLINA7335-20-036
3CROSS SECTIONS0LRMELHDRGISSUED FOR PERMITTING & APPROVAL07/29/20200 5 10
0 5 10
PROFILE HORIZONTAL
PROFILE VERTICAL
GRAPHIC SCALE (IN FEET)
1
3
WEST BANK SECTION A-A 2
3
EAST BANK SECTION B-B
2
1 2
1
2
1
APPROX. PROPOSED
GROUND SURFACE
APPROX. EXISTING
GROUND SURFACE
APPROX. PROPOSED
GROUND SURFACE
APPROX. EXISTING
GROUND SURFACE
5-FT.
-2% SLOPE
10-FT. APPROX.
10-FT. APPROX.
PROPOSED ROCK
STABILIZATION
PROPOSED ROCK
STABILIZATION
INSTALL TEMPORARY DAM
(WATER-FILLED DAM OR
ENGINEER APPROVED EQUIVALENT)INSTALL TEMPORARY DAM
(WATER-FILLED DAM OR
ENGINEER APPROVED EQUIVALENT)
APPROX. LOCATION
EXISTING 8-IN. GAS LINE
(TO BE REMOVED)
APPROX. LOCATION
EXISTING 8-IN. GAS LINE
(TO BE REMOVED)
EL. 723.0EL. 723.0
EL. 717.0
EL. 719.0
EL. ~721EL. ~721
APPROX. BASEFLOW DEPTHAPPROX. BASEFLOW DEPTH
5-FT.
-2% SLOPE2
1
7
5-FT.
BENCH @
-2% SLOPE
2
1
2
1
2
1
2 3 OF TOTAL LENGTH
NOTE:
1.LIVE STAKE PLANTING SHALL BE 3 ROWS SPACED 2-FT APART IN A DIAMOND PATTERN:
·ELDERBERRY;
·BUTTON BUSH; AND
·SILKY WILLOW.
2.LIVE STAKE PLANTING SHALL BE INSTALLED ALONG STREAMBANKS WHERE SHOWN AND/OR AS DIRECTED BY OWNERS ENVIRONMENTAL INSPECTOR.
3.STRUCTURAL FILL MATERIAL SHALL BE PLACED IN MAX. 8-IN. LOOSE LIFTS AND COMPACTED TO A MINIMUM OF 95 PERCENT STD. PROCTOR MAX. DRY
DENSITY (AASHTO T99 AS MODIFIED BY NCDOT OR ASTM D698) AND +/- 3 PERCENT OF THE MATERIAL'S OPTIMUM MOISTURE CONTENT IN
ACCORDANCE WITH NCDOT SECTION 235-3.
4.STRUCTURAL FILL PLACED WITHIN THE FINAL 12-IN. OF SOIL SUBGRADE SHALL BE COMPACTED TO A MIN. 100 PERCENT STD. PROCTOR DENSITY.
5.FILL MATERIAL SHALL BE CLASS I BACKFILL. CLASS I MATERIAL SHALL CONSIST OF SILTY OR CLAYEY SOIL MEETING AASHTO M145 SOIL CLASSIFICATION
A-4, A-2, A-5, A-6, OR A-7 PROVIDED THE MATERIALS DO NOT HAVE A LIQUID LIMIT (LL) GREATER THAN 50. THE PLASTICITY INDEX (PI) SHALL RANGE
BETWEEN 7 AND 20.
6.ALTERNATIVELY, SOILS MEETING UNIFIED SOIL CLASSIFICATION SYSTEM (USCS) CLASSIFICATION ML, CL, SM, OR SC MEETING A MINIMUM OF 30 TO 35
PERCENT FINES AND MEETING A PI OF BETWEEN 7 AND 20 MAY BE USED.
1
10-FT. APPROX.
10-FT. APPROX.
2
4
GREEN ARMOR DETAIL
(TYP.)
2 3 OF TOTAL LENGTH
6-IN. MIN.6-IN. MIN
6-IN. MIN.4
5
COMPOST FILTER SOCK
(TYP.)
4
5
COMPOST FILTER SOCK
(TYP.)
10
6
SLOPE BENCHING DETAIL
(TYP.)
10
6
SLOPE BENCHING DETAIL
(TYP.)
6
5
WATERBAR
(TYP.)
5-FT.
BENCH @
-2% SLOPE
2
4
GREEN ARMOR DETAIL
(TYP.)
BOULDERS
2-FT. x 3-FT. x 3-FT. MIN.
APPROX. EXISTING
GROUND SURFACE
APPROX. PROPOSED
GROUND SURFACE
APPROX.
BASEFLOW
HEIGHT
AASHTO M 43
NO. 2 AGGREGATE
BOULDERS
2-FT. x 3-FT. x 3-FT. MIN.
APPROX. PROPOSED
GROUND SURFACE
APPROX. EXISTING
GROUND SURFACE INSTALL TEMPORARY DAM
(WATER FILLED SYSTEM OR
ENGINEERED APPROVED EQUIVALENT)
INSTALL TEMPORARY DAM
(WATER FILLED SYSTEM OR
ENGINEERED APPROVED EQUIVALENT)
AASHTO M 43
NO. 2 AGGREGATE
APPROX.
BASEFLOW
HEIGHT
BACKFILL & COMPACT
(SEE NOTES 3 - 6).
BACKFILL & COMPACT
(SEE NOTES 3 - 6).
TYPICAL PLACEMENT
2-FT TO 4-FT LIVE CUTTINGS (DORMANT)
SPACED 2-FT APART IN DIAMOND PATTERN
(PLANT STAKES WITH
BUDS ORIENTED UP, SEE NOTES 1 & 2).
TYPICAL PLACEMENT
2-FT TO 4-FT LIVE CUTTINGS (DORMANT)
SPACED 2-FT APART IN DIAMOND PATTERN
(PLANT STAKES WITH
BUDS ORIENTED UP, SEE NOTES 1 & 2).
INSTALL EL: 724-FT.
INSTALL EL: 724-FT.
NON-WOVEN
GEOTEXTILE 10 OZ/SY
NON-WOVEN
GEOTEXTILE 10 OZ/SY
APPROX. BANKFULL
HEIGHT (EL. 725.5-FT.)
6-IN. MIN.
REFERENCE:
DETAIL ADOPTED FROM PROFILE PRODUCTS GREEN ARMOR™SYSTEM
FUTERRA®FLEXTERRA® HP-FGM DETAILS.
- CONTACT PROFILE PRODUCTS AT 800-508-8681 FOR
ADDITIONAL INFORMATION.
12 IN
(30 CM)
12 IN (30 CM)
12 IN
(30 CM)
12 IN
30 CM
12 -24 IN
(30-61 CM)
TRM MATERIALS NOTES:
TURF REINFORCEMENT MAT SHALL BE FUTERRA®R45, MANUFACTURED FOR THE PURPOSE
OF PERMANENT SLOPE STABILIZATION AND TURF REINFORCEMENT. THE HP-TRM SHALL BE
MADE FROM 100% SYNTHETIC MATERIAL AND CONTAIN NO BIODEGRADABLE COMPONENTS
OR MATERIALS.
1.THE HP-TRM SHALL BE A HOMOGENEOUS, THREE-DIMENSIONAL MATRIX CONSISTING
OF CONTINUOUS MONOFILAMENT YARNS WHICH ARE THERMALLY FUSED AT THE
CROSSOVER POINTS TO PROVIDE A STRUCTURE THAT WILL MAINTAIN ITS DIMENSIONAL
STABILITY WITHOUT LAMINATED OR STITCHED LAYERS. NO NETTINGS OR STITCHING
SHALL BE PERMITTED. THE HP-TRM SHALL HAVE A MINIMUM 95% OPEN SPACE
AVAILABLE FOR SOIL, HP-FGM AND ROOT INTERACTION. THE HP-TRM SHALL NOT LOSE
ITS STRUCTURAL INTEGRITY AND SHALL NOT UNRAVEL OR SEPARATE WHEN HP-TRM IS
CUT IN THE FIELD.
2.THE HP-TRM SHALL EXHIBIT NO BUOYANCY FACTOR (I.E., THE SPECIFIC GRAVITY OF THE
FIBERS USED SHOULD BE GREATER THAN 1.0) SO AS TO ALLOW THE HP-TRM TO
MAINTAIN INTIMATE CONTACT WITH THE SOIL (PARTICULARLY BETWEEN FASTENERS)
UNDER LOW FLOW OR SUBMERSED CONDITIONS.
3.THE HP-TRM, WHEN INFILLED WITH HP-FGM, SHALL MEET THE FOLLOWING PROPERTY
VALUES:
PROFILE VIEW
ISOMETRIC VIEW
12 IN
(300 MM)
MIN 4 IN
(100 MM) OVERLAP
6 FT
2:1 SLOPE
3 FT
(1 M)
HYDRAULIC INFILL NOTES:
1.HYDRAULICALLY FILL THE TRM WITH FLEXTERRA®HP-FGMTM, APPLIED WITH HOSE AT CLOSE RANGE AT APPLICATION RATE AND DEPTH SHOWN IN TABLE BELOW OR
TO THE DEPTH OF WHERE THE TIPS OF TRM ARE STILL EXPOSED:
FUTERRA TRM HP-FGM FILL APPLICATION RATE
R45 0.7 IN (18 MM) 3,500 LB/AC (3,920 KG/HA)
2.STRICTLY COMPLY WITH HP-FGM MANUFACTURER'S INSTALLATION INSTRUCTIONS AND RECOMMENDATIONS. FOR OPTIMUM HP-FGM PUMPING AND APPLICATION
PERFORMANCE, USE APPROVED MECHANICALLY AGITATED, HYDRAULIC SEEDING/MULCHING MACHINES, HOSE OF SUFFICIENT LENGTH TO REACH THE TRM, USE OF A
50 DEGREE TIP/NOZZLE IS HIGHLY RECOMMENDED.
3.APPLY HP-FGM FROM HOSE POSITIONED OVER SHOULDER WITH NOZZLE APPROXIMATELY AT CHEST LEVEL (4-5 FT OR 1.2-1.5 M) TO ACHIEVE OPTIMUM TRM INFILL.
4.FOR OPTIMUM HYDRAULIC PERFORMANCE AND VEGETATIVE ESTABLISHMENT, BE CAREFUL NOT TO OVERFILL THE TRM. THE TIPS OF THE TRM SHALL BE SLIGHTLY
EXPOSED.
5.APPLY SUPPLEMENTAL WATER OVER THE AREA AS DIRECTED BY SITE PERSONNEL DURING GERMINATION AND INITIAL THREE MONTHS OF VEGETATION GROWTH.
SITE PREPARATION NOTES:
1.THE INSTALLATION SITE SHALL BE PREPARED BY CLEARING, GRUBBING AND EXCAVATION OR FILLING
THE AREA TO THE DESIGN GRADE.
2.THE SURFACE TO RECEIVE THE HP-TRM SHALL BE PREPARED TO RELATIVELY SMOOTH CONDITIONS
FREE OF OBSTRUCTIONS, ROCKS, DIRT CLODS, ROOTS, STUMPS, DEPRESSIONS, DEBRIS AND SOFT OR
LOW DENSITY POCKETS OF SUBSTRATE. EROSION FEATURES SUCH AS RILLS, GULLIES, ETC. MUST BE
GRADED OUT OF THE SURFACE BEFORE HP-TRM DEPLOYMENT. THE SUBSTRATE SHALL BE CAPABLE
OF SUPPORTING A VEGETATIVE COVER AS DETERMINED BY SOIL TESTING.
3.COMPACTION AS SPECIFIED BY THE GEOTECHNICAL ENGINEER MAY BE REQUIRED (AT THE OWNERS
REQUEST) BEFORE DEPLOYING PRODUCT TO MAKE SURE THE HP-TRM MAKES IMMEDIATE CONTACT
WITH THE SOIL.
4.CUT TRENCHES FOR INITIAL ANCHOR TRENCHES, TERMINATION TRENCH AND LONGITUDINAL
ANCHOR TRENCHES (12 IN (30 CM) WIDE AND 12 IN (30 CM) IN DEPTH) AS SHOWN ON THE
DRAWINGS.
INSTALLATION NOTES:
1.CARE SHALL BE TAKEN DURING INSTALLATION TO AVOID DAMAGE OCCURRING TO THE HP-TRM AS
A RESULT OF THE INSTALLATION PROCESS. SHOULD THE HP-TRM BE DAMAGED DURING
INSTALLATION, A HP-TRM PATCH SHALL BE PLACED OVER THE DAMAGED AREA EXTENDING 1.0 FT
(0.3 M) BEYOND THE PERIMETER OF THE DAMAGE.
INITIAL ANCHOR
TRENCH 12 IN (30CM)
WIDE & 12 IN (30CM) DEEP
TAMP SOIL OVER MAT
FLEXTERRA®HP-FGMTM
HYDRAULIC INFILL
10-12 IN. (25-30 CM),
8 GAUGE MIN,
STAPLES/ANCHOR PINS
FUTERRA® R45 HP-TRM
TEST METHOD UNITS VALUE
MECHANICAL PROPERITES MARV MD MARV CS
TENSILE STRENGHT ASTM D 6818 lb/ft (kN/m)3,000 (45)3,000 (45)
TENSILE STRENGHT @ 2% STRRAIN ASTM D 6818 lb/ft (kN/m)450 (6.5)451 (6.5)
MECHANICAL PROPERITES TYPICAL MARV
MASS PER UNIT AREA (TRM + GRID)ASTM D 6566 oz/yd2 (g/m2)20 (678)16 (543)
THICKNESS (MIN)ASTM D 6252 inches (mm)0.75 (19)0.6 (15.2)
RESILIENCY (MIN)ASTM D 6524 %85 80
UV STABILITY (3000 HRS)ASTM D 4355 %80
ENDURANCE
FUNCTIONAL LONGEVITY1 OBSERVED MONTHS > 36
PERFORMANCE
C-FACTOR2 / % EFFECTIVENESS2 LARGE SCALE3 n/a / %< 0.01 / >99
MANNING'S N RANGE ASTM D 64604 n/a 0.025 - 0.045
PERMISSIBLE VEG. VELOCITY ASTM D 64604 ft/s (m/s)30.0 (9.1)
PERMISSIBLE VEG. SHEAR ASTM D 64604 lb/ft2 (N/m2)20.0 (960)
PERMISSIBLE UNVEG. VELOCITY ASTM D 64604 ft/s (m/s)16.0 (4.9)
PERMISSIBLE UNVEG. SHEAR ASTM D 64604 lb/ft2 (N/m2)5.8 (280)
VEGETATION ESTABLISHMENT ASTM D 7322 %800
PHYSICAL PROPERTIES UNITS VALUE
DIMENSIONS (WIDTH X LENGTH)ft (m)8.0 x 90 (2.4 x 27.4)
ROLL AREA yd2 (m2)80.0 (66.9)
ESTIMATED ROLL DIAMETER ft (m)2.0 (0.6)
ESTIMATED ROLL WEIGHT lb (kg)90 (40.5)
COLOR n/a BLACK
1 FUNCTIONAL LONGEVITY IS AN ESTIMATE OF PRODUCT FUNCTIONALITY AND IS DEPENDENT UPON
MOISTURE, LIGHT, MICROBIAL AND OTHER ENVIRONMENTAL CONDITIONS.
2 COVER FACTOR IS CALCULATED AS SOIL LOSS RATIO OF TREATED SURFACE VERSUS AN UNTREATED
CONTROL SURFACE. % EFFECTIVENESS = ONE MINUS COVER FACTOR MULTIPLIED BY 100%.
3 LARGE SCALE TESTING CONDUCTED AT UTAH WATER RESEARCH FACILITY USING RAINFALL
SIMULATOR ON 2.5H:1V SLOPE, SANDY-LOAM SOIL, AT A RATE OF 5” PER HOUR FOR A DURATION OF
60 MINUTES.
4 FLUME TESTING PERFORMED AT COLORADO STATE UNIVERSITY - DATA AND DETAILS AVAILABLE
UPON REQUEST.
4.ALL COMPONENTS OF THE HP-FGM (SEE HYDRAULICAL INFILL NOTES) SHALL BE
PRE-PACKAGED BY THE MANUFACTURER TO ASSURE BOTH MATERIAL PERFORMANCE
AND COMPLIANCE WITH THE FOLLOWING VALUES. NO CHEMICAL ADDITIVES WITH THE
EXCEPTION OF FERTILIZER, SOIL PH MODIFIERS, EXTENDED-TERM DYES AND
BIOSTIMULANT MATERIALS SHOULD BE ADDED TO THIS PRODUCT.
·THERMALLY PROCESSED* (WITHIN A PRESSURIZED VESSEL) WOOD FIBER - 80%
··*HEATED TO A TEMPERATURE GREATER THAN 380 DEGREES FAHRENHEIT (193
DEGREES CELSIUS) FOR 5 MINUTES AT A PRESSURE GREATER THAN 50 PSI (345
KPA)
·WETTING AGENTS (INCLUDING HIGH-VISCOSITY COLLOIDAL POLYSACCHARIDES,
CROSS-LINKED BIOPOLYMERS, AND WATER ABSORBENTS) - 10%
·CRIMPED BIODEGRADABLE INTERLOCKING FIBERS - 5%
·MICRO-PORE GRANULES - 5%
SEEDBED REQUIREMENTS
TO MAINTAIN A GOOD STAND OF RIPARIAN VEGETATION, THE SOIL MUST BE THE TOPSOIL THAT HAS BEEN
STOCKPILED DURING THE GRADING AND EXCAVATION OPERATIONS. THIS TOP SOIL SHOULD ALSO HAVE
THESE CRITERIA:
·ENOUGH FINE-GRAINED (SILT AND CLAY) MATERIAL TO MAINTAIN ADEQUATE MOISTURE AND
NUTRIENT SUPPLY (AVAILABLE WATER CAPACITY OF AT LEAST .05-IN. WATER TO 1-IN. OF SOIL).
·SUFFICIENT PORE SPACE TO PERMIT ROOT PENETRATION.
·SUFFICIENT DEPTH OF SOIL TO PROVIDE AN ADEQUATE ROOT ZONE. THE DEPTH TO ROCK OR
IMPERMEABLE LAYERS SUCH AS HARDPANS SHOULD BE 12-IN. OR MORE, EXCEPT ON SLOPES STEEPER
THAN 2:1 WHERE THE ADDITION OF SOIL IS NOT FEASIBLE.
·A FAVORABLE PH RANGE FOR PLANT GROWTH, USUALLY 6.0 - 6.5.
·FREE FROM LARGE ROOTS, BRANCHES, STONES, LARGE CLODS OF EARTH, OR TRASH OF ANY KIND.
CLODS AND STONES MAY BE LEFT ON SLOPES STEEPER THAN 3:1 IF THEY ARE TO BE HYDRO SEEDED.
·IF ANY OF THE ABOVE CRITERIA ARE NOT MET - I.E., IF EXISTING SOIL IS TOO COARSE, DENSE, SHALLOW
OR ACIDIC TO FOSTER VEGETATION - A ONE TIME APPLICATION OF SPECIAL AMENDMENTS ARE
ALLOWED. HOWEVER, FERTILIZER MUST NOT OCCUR WITHIN 10-FT. OF TO OF BANK OR COME IN
CONTACT WITH WATER. THE SOIL CONDITIONERS DESCRIBED BELOW MAY BE BENEFICIAL OR,
PREFERABLY, TOPSOIL MAY BE APPLIED.
SEEDBED PREPARATION
INSTALL NECESSARY EROSION AND SEDIMENTATION CONTROL PRACTICES BEFORE SEEDING, AND
COMPLETE GRADING ACCORDING TO THE APPROVED PLAN.
ROUGHEN RIPARIAN SURFACES BY DISKING, RAKING, HARROWING, OR OTHER SUITABLE METHODS PRIOR TO
SEEDING.
COMPLETE SEEDBED PREPARATION BY BREAKING UP LARGE CLODS AND RAKING INTO A SMOOTH, UNIFORM
SURFACE. BROADCAST SEED INTO A FRESHLY LOOSENED SEEDBED THAT HAS NOT BEEN SEALED BY
RAINFALL.
GENERAL RIPARIAN SEEDING REQUIREMENTS
NATIVE RIPARIAN SEED SPECIFICATIONS
SEEDING MIXTURE
SPECIES COMMON NAME PERCENTAGE OF MIX
ELYMUS VIRGINICUS VIRGINIA WILD RYE 20
PANICUM VIRGATUM SWITCHGRASS 15
AGROSTIS PERENNANS AUTUMN BENTGRASS 15
RUDBECKIA HIRTA BLACK-EYED SUSAN (NC ECOTYPE)10
COREOPSIS LANCEOLATA LANCE LEAF COREOPSIS 10
ANDROPOGON GERARDII BIG BLUESTEM 10
JUNCUS EFFUSUS SOFT RUSH (NC ECOTYPE)5
SCHIZACHYRIUM SCOPARIUM LITTLE BLUESTEM 5
SORGHASTRUM NUTANS INDIAN GRASS 5
TRIPSACUM DACTYLOIDES EASTERN GAMMA 5
Total 100
NOTE: THE RECOMMENDED APPLICATION RATE FOR THE RIPARIAN SEED MIXTURE ABOVE IS 20 TO 25-LBS PER ACRE. APPLY
SEED MIXTURE TO DISTURBED UPLAND RIPARIAN AREAS, EXTENDING 50-FEET LANDWARD.
SOIL AMENDMENTS
A ONE TIME APPLICATION OF SOIL AMMENDMENTS MAY BE APPLIED WITHIN RIPARIAN AREAS AS PER THE GENERAL SEEDING
SPECIFICATIONS. SOIL AMENDMENTS ARE NOT TO BE APPLIED IN WETLAND AREAS.
MAINTENANCE
RESEED/OVER SEED IF GROWTH IS NOT FULLY ADEQUATE.
GROUND STABILIZATION SHALL BE PERFORMED PER TIME FRAMES OUTLINED IN GENERAL SEEDING SPECIFICATIONS.
NATIVE RIPARIAN SEED
COVER/COMPANION CROPS
SPECIES COMMON NAME SEASON MIX NOTES
SECALE CEREALE CEREAL OR WINTER
RYE
EARLY SPRING OR
FALL 30 LBS/ACRE GROWS 3-4' TALL, BUT NOT A STRONG A
COMPETITOR.
LOLIUM
PERENNE PERENNIAL RYE EARLY FALL OR
SPRING 20-50%SHORTER RYE; LASTS ABOUT 2 YEARS, THEN DIES
OUT.
UROCLOA
RAMOSE BROWN TOP MILLET SPRING, SUMMER 20-50%GOOD GERMINATION; DIES OFF WITH FROST;
DOES NOT TOLERATE MOWING.
2.INSTALL ANCHORING DEVICES AT A FREQUENCY OF 2.5 PINS/STAPLES PER SQUARE YARD (3
PINS/STAPLES PER SQUARE METER). ADDITIONAL ANCHORING DEVICES MAY BE REQUIRED DEPENDING
ON SITE CONDITIONS OR ALIGNMENT OF THE SLOPE OR CHANNEL. ALWAYS STAPLE (12 IN (30 CM)
CENTERS) THE SEAMS BETWEEN INDIVIDUAL HP-TRM ROLLS.
3.WHEN OVERLAPPING SUCCESSIVE HP-TRM ROLLS, THE ROLLS SHALL BE OVERLAPPED UPSTREAM OVER
DOWNSTREAM AND/OR UPSLOPE OVER DOWNSLOPE.
4.FOR SLOPES, CONSTRUCT TOP ANCHOR TRENCH 1-3 FT (0.3-0.9 M) BEYOND CREST OF SLOPE, OR AS
ILLUSTRATED IN DRAWINGS OR SHOWN IN MANUFACTURERS RECOMMENDED INSTALLATION
GUIDELINES. POSITION HP-TRM ROLL AT CREST OF SLOPE WITH SUFFICIENT MATERIAL TO LINE THE
ENTIRE ANCHOR TRENCH PLUS ENOUGH MATERIAL LEFT OVER TO COVER THE TRENCH. POSITION
ADJACENT ROLLS TO FACILITATE 6 IN.(0.15M) OVERLAPS. ANCHOR HP-TRM IN TRENCH WITH
APPROPRIATE PINS/STAPLES AT 1 FT (0.3 M) CENTERS. ONCE SEVERAL ROLLS ARE ANCHORED IN
TRENCH, BEGIN TO BACKFILL AND COMPACT TRENCH TO ORIGINAL ELEVATION. THE PREFERRED
METHOD OF DEPLOYING ROLL DOWN SLOPE IS TO STAND IN FRONT OF THE ROLL AND PIN IT AS IT
ROLLS OUT DOWN THE SLOPE, MINIMIZING FOOT TRAFFIC ON HP-TRM, WHICH WILL ELIMINATE
DEPRESSIONS UNDER THE MAT. ALWAYS ALLOW THE MAT TO DRAPE OVER THE SOIL, NEVER PULLING
IT TAUT, TO MINIMIZE TENTING. PLACE ADDITIONAL PINS INTO ANY APPARENT DEPRESSIONS TO
MAINTAIN CONTACT WITH THE SOIL.
CLEANING AND PROTECTION:
1.AFTER APPLICATION, THOROUGHLY FLUSH THE TANK, PUMPS AND HOSES TO REMOVE ALL MATERIAL.
WASH ALL MATERIAL FROM THE EXTERIOR OF THE MACHINE AND REMOVE ANY SLURRY SPILLS. ONCE
DRY, MATERIAL WILL BE MORE DIFFICULT TO REMOVE.
2.CLEAN SPILLS PROMPTLY. ADVISE OWNER OF METHODS FOR PROTECTION OF TREATED AREAS. DO
NOT ALLOW TREATED AREAS TO BE TRAFFICKED OR SUBJECTED TO GRAZING.
INSPECTION AND MAINTENANCE:
1.ALL INSPECTIONS AND MAINTENANCE RECOMMENDATIONS SHALL BE CONDUCTED BY ONSITE
ENVIRONMENTAL INSPECTOR AND BE CONSISTENT WITH THE OWNER, ENGINEER AND
MANUFACTURER RECOMMENDATIONS.
2.INSPECT MATTED AREAS ONCE EVERY SEVEN (7) CALENDAR DAYS AND WITHIN 24 HOURS OF A RAIN
EVENT THAT PRODUCES GREATER THAN OR EQUAL TO 1.0 INCHES OF RAIN IN A 24 HOUR PERIOD.
3.INITIAL INSPECTIONS SHALL INSURE INSTALLATIONS ARE IN ACCORDANCE WITH THE PROJECT PLANS
AND SPECIFICATIONS WITH MATERIAL QUANTITIES AND ACTIVITIES FULLY DOCUMENTED.
SEEDING
USE CERTIFIED SEED FOR NATIVE RIPARIAN SEEDING.
LABELING OF NON-CERTIFIED SEED IS ALSO REQUIRED BY LAW. LABELS CONTAIN IMPORTANT INFORMATION ON SEED PURITY,
GERMINATION, AND PRESENCE OF WOOD SEEDS. SEEDS MUST MEET STATE STANDARDS FOR CONTENT OF NOXIOUS WEEDS. DO
NO ACCEPT SEED CONTAINING "PROHIBITED" NOXIOUS WEED SEED.
WHEN USING BROADCAST-SEEDING METHODS, SUBDIVIDE THE AREA INTO WORKABLE SECTIONS AND DETERMINE THE AMOUNT
OF SEED NEEDED FOR EACH SECTION. APPLY ONE-HALF THE SEED WHILE MOVING BACK AND FORTH ACROSS THE AREA, MAKING
A UNIFORM PATTERN: THEN APPLY THE SECOND HALF IN THE SAME WAY, BUT MOVING AT RIGHT ANGLES TO THE FIRST PASS.
MAINTENANCE
GENERALLY, A STAND OF VEGETATION CANNOT BE DETERMINED TO BE FULLY ESTABLISHED UNTIL SOIL COVER HAS BEEN
MAINTAINED FOR ONE FULL YEAR FROM PLANTING. INSPECT SEEDED AREAS FOR FAILURE AND MAKE NECESSARY REPAIRS AND
RESEEDINGS WITHIN THE SAME SEASON, IF POSSIBLE.
RESEEDING--IF A STAND HAS INADEQUATE COVER, RE-EVALUATE CHOICE OF PLANT MATERIALS. RE-ESTABLISH THE STAND AFTER
SEEDBED PREPARATION OR OVER- SEED THE STAND.
SEEDING SPECIFICATIONS
SEE TABLES FOR RIPARIAN AREAS SEEDING SPECIFICATIONS.DRAWING PATH: N:\Projects\2020\036 Broad River Bank Stabilization\DWG\FDPA\733520036_DETAILS.dwgDRAWING NUMBER
PROJECT NUMBER BYDESCRIPTIONDATENO.CHKAPV9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
[phone]
FLOODPLAIN DEVELOPMENT PERMIT APPLICATIONBROAD RIVER BANK STABILIZATION PROJECTRUTHERFORD COUNTY, NORTH CAROLINA7335-20-036
4DETAILS (1 OF 4)0LRMELHDRGISSUED FOR PERMITTING & APPROVAL07/29/2020ENGINEERING FIRM
LICENSE NUMBER: F-0176
1
4
TOE-ROCK RIVER STABILIZATION
SCALE: N.T.S.
2
4
GREEN ARMOR DETAIL
SCALE: N.T.S.7
24-IN.
6-FT. MAX.
SILT FENCE NOTES
USE A SYNTHETIC FILTER FABRIC OF AT LEAST
95% BY WEIGHT OF POLYOLEFINS OR
POLYESTER, WHICH IS CERTIFIED BY THE
MANUFACTURER OR SUPPLIER AS CONFORMING
TO THE REQUIREMENTS IN ASTM D 6461.
1.SYNTHETIC FILTER FABRIC SHOULD
CONTAIN ULTRAVIOLET RAY INHIBITORS
AND STABILIZERS TO PROVIDE A
MINIMUM OF 6 MONTHS OF EXPECTED
USABLE CONSTRUCTION LIFE AT A
TEMPERATURE OF 0 TO 120° F.
2.CONSTRUCT THE FILTER FABRIC FROM A
CONTINUOUS ROLL CUT TO THE LENGTH
OF THE SILT FENCE TO AVOID JOINTS.
WHEN JOINTS ARE NECESSARY, SECURELY
FASTEN THE FILTER FABRIC ONLY AT A
SUPPORT POST WITH 4 FEET MINIMUM
OVERLAP TO THE NEXT POST.
3.DO NOT ATTACH FILTER FABRIC TO
EXISTING TREES.
4.WOODEN POSTS ARE ALLOWED WHEN
CROSSING "LIVE" NATURAL GAS PIPELINES.
SILT FENCE MAINTENANCE
1.INSPECT AT LEAST ONCE PER 7 CALENDAR
DAYS AND WITHIN 24 HOURS OF A RAIN
EVENT GREATER THAN OR EQUAL TO
1.0-IN. IN 24 HOURS.
2.SHOULD THE FABRIC OF A SILT FENCE
COLLAPSE, TEAR, DECOMPOSE OR
BECOME INEFFECTIVE, REPLACE IT
PROMPTLY.
3.REMOVE SEDIMENT DEPOSITS AS
NECESSARY TO PROVIDE ADEQUATE
STORAGE VOLUME FOR THE NEXT RAIN
AND TO REDUCE PRESSURE ON THE
FENCE. TAKE CARE TO AVOID
UNDERMINING THE FENCE DURING
CLEANOUT.
REF:DETAIL BASED ON NCDEQ EROSION AND
SEDIMENT CONTROL PLANNING AND DESIGN
MANUAL, CHAPTERS 6 AND 8 REVISED, MAY
2013
EXTRA STRENGTH
WOVEN FILTER FABRIC (SEE TABLE)
5-FT. SELF FASTENER ANGLE STEEL POST
(1.25 LB / LINEAR FT.)
FLOW
COMPACTED BACKFILL
24-IN.
PLASTIC OR WIRE TIE (TYP.)
(MIN. 50-LB. TENSILE STRENGTH)
SILT FENCE SECTION VIEW CROSS-SECTION A-A'
A'
A
EXTRA STRENGTH
WOVEN FILTER FABRIC (SEE TABLE)
5-FT. SELF FASTENER ANGLE STEEL POST
(1.25 LB / LINEAR FT.)
SILT FENCE PLAN VIEW
FLOW
EXTRA STRENGTH
WOVEN FILTER FABRIC TABLE
PROPERTY TEST VALUE
GRAB TENSILE STRENGTH ASTM D4632 125-LBS. MARV
GRAB TENSILE ELONGATION ASTM D4632 100-LBS. MARV
PERMITTIVITY ASTM D 4791 0.05 (SEC-1) MARV
APPARENT OPENING SIZE ASTM D 4751 US SIEVE #30
ULTRAVIOLET STABILITY AT
500 HR OF EXPOSURE ASTM D 4355 70% TYPICAL
PLASTIC OR WIRE TIE (TYP.)
(MIN. 50-LB. TENSILE STRENGTH)
EXTRA STRENGTH WOVEN FILTER FABRIC
(SEE TABLE)
COMPACTED BACKFILL
8-IN.
4-IN.
36-IN.
5-FT. SELF FASTENER
ANGLE STEEL POST
(1.25 LB / LINEAR FT.)
COMPOST FILTER SOCK MAINTENANCE
1.INSPECT AT LEAST ONCE PER 7 CALENDAR DAYS AND WITHIN 24
HOURS OF A RAIN EVENT GREATER THAN OR EQUAL TO 1.0-IN. IN 24
HOURS.
2.MAKE ANY NECESSARY REPAIRS IMMEDIATELY.
3.REMOVE ACCUMULATED SEDIMENT OVER 1/2 THE HEIGHT OF THE
COMPOST FILTER SOCK AND ANY DEBRIS. THE COMPOST SOCK MUST
BE REPLACED IF CLOGGED OR TORN.
4.IF PONDING BECOMES EXCESSIVE, THE SOCK MAY NEED TO BE
REPLACED WITH ONE OF A LARGER DIAMETER OR A DIFFERENT
MEASURE. THE SOCK NEEDS TO BE REINSTALLED IF UNDERMINED OR
DISLODGED.
5.THE COMPOST FILTER SOCK SHALL BE REGULARLY INSPECTED UNTIL
LAND DISTURBANCE IS COMPLETE AND THE AREA ABOVE THE
MEASURE HAS BEEN PERMANENTLY STABILIZED.
6.REMOVE ALL COMPOST FILTER SOCK MATERIALS AND UNSTABLE
SEDIMENT DEPOSITS AND RETURN THE AREA TO GRADE AND
STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN
PROPERLY STABILIZED.
7.REFER TO NOTES & SEEDING SPECIFICATIONS FOR COMPOST
MATERIAL REQUIREMENTS AND DISPOSAL/RECYCLING HANDLING.
REF: DETAIL BASED ON NCDEQ EROSION AND SEDIMENT CONTROL
PLANNING AND DESIGN MANUAL, CHAPTERS 6 REVISED, MAY 2013 AND
FILTREXX® SWPPP CUT SHEET - SEDIMENT/PERIMETER CONTROL
(SILTSOXX™).
PYRAMID STACK SOCK SECTION VIEW
10-FT.
18-IN. MIN.
OVERLAP
30°COMPOST FILTER SOCK PLAN VIEW
SINGLE SOCK SECTION VIEW
3-IN. MIN
12-IN. MIN.
FLOW
STAKES
(SEE NOTE 5)
10-FT. O.C.
COMPOST FILTER SOCK
(SEE NOTE 1)
WOOD MULCH
(SEE NOTE 9)
CLOSED END
WOOD MULCH
(SEE NOTE 9)
STAKES
(SEE NOTE 5)
10-FT. O.C.COMPOST FILTER SOCK
STAKES
(SEE NOTE 5)
10-FT. O.C.
STAKES
(SEE NOTE 5)
10-FT. O.C., STARTING 5-FT.
FROM ANGLED STAKES
FLOW
12-IN. MIN.
16 GAUGE WIRE
COMPOST FILTER SOCK NOTES
1.USE FILTREXX® COMPOST FILTER SOCK OR
ENGINEER APPROVED EQUIVALENT. REFER TO PLAN
VIEWS FOR COMPOST FILTER SOCK DIAMETER.
2.TO PREVENT WATER & SEDIMENT FROM FLOWING
AROUND MEASURES A MINIMUM 10-FT. LENGTH OF
COMPOST FILTER SOCK MUST BE PLACED UPSLOPE
AT A 30 DEGREE ANGLE FROM THE ENDS OF THE
MEASURES.
3.COMPOST SOCKS SHOULD BE LOCATED AS SHOWN
ON PLANS AND AS DIRECTED BY THE OWNER'S
INSPECTOR OR DESIGNATED REPRESENTATIVE AS
NEEDED BASED UPON FIELD CONDITIONS.
4.PRIOR TO INSTALLATION, CLEAR ALL
OBSTRUCTIONS INCLUDING ROCKS, CLODS, AND
OTHER DEBRIS GREATER THAN 1-IN. THAT MAY
INTERFERE WITH PROPER FUNCTION OF THE
COMPOST SOCK.
5.OAK OR OTHER DURABLE HARDWOOD STAKES 2-IN.
BY 2-IN. IN CROSS SECTION SHOULD BE DRIVEN
VERTICALLY PLUMB, THROUGH THE CENTER OF THE
COMPOST SOCK. STAKES SHOULD BE PLACED AT A
MAXIMUM INTERVAL OF 10 FT. O.C. STAKES SHOULD
BE DRIVEN TO A MINIMUM DEPTH OF 12-IN., WITH
A MINIMUM OF 3-IN. PROTRUDING ABOVE THE
COMPOST SOCK.
6.IN THE EVENT STAKING IS NOT POSSIBLE (I.E., WHEN
SOCKS ARE USED ON PAVEMENT) HEAVY CONCRETE
BLOCKS SHALL BE USED BEHIND THE SOCK TO HOLD
IT IN PLACE DURING RUNOFF EVENTS.
7.IF THE COMPOST SOCK IS TO BE LEFT AS PART OF
THE NATURAL LANDSCAPE, IT MAY BE SEEDED AT
TIME OF INSTALLATION FOR ESTABLISHMENT OF
PERMANENT VEGETATION USING THE SEED MIX ON
NOTES & SEEDING SPECIFICATIONS DRAWING.
8.COMPOST FILTER SOCKS ARE NOT TO BE USED IN
PERENNIAL OR INTERMITTENT STREAMS.
9.APPLY WOOD MULCH OR COMPOST TO 12 HEIGHT
OF COMPOST FILTER SOCK.
3-IN. MIN WOOD MULCH
(SEE NOTE 9)
COMPOST FILTER SOCK
FLOWFLOW
SILT FENCE OUTLET PLAN VIEW
SILT FENCE OUTLET SECTION VIEW CROSS-SECTION A-A'
8-FT. MIN.
1-FT. MIN. OVERLAP
SILT FENCE OUTLET NOTES
1.USE 18-INCH FILTREXX® COMPOST FILTER SOCK OR ENGINEER APPROVED EQUIVALENT.
FILTER SOCKS SHALL BE A MINIMUM OF 8-FT. IN LENGTH. MINIMUM OF 14.5-IN. HEIGHT
OF COMPOST FILTER SOCK AFTER INSTALLATION.
2.WATTLES ARE NOT TO BE USED IN PLACE OF COMPOST SOCK OR STONE.
3.5-FT. SELF FASTENER ANGLE STEEL POST OR 2-IN. BY 2-IN. HARD WOODEN STAKES
SHALL BE INSTALLED THROUGH THE MIDDLE OF THE COMPOST FILTER SOCK. SPACE
STAKES A MAXIMUM OF 2-FT. O.C. DRIVE THE HARD WOODEN STAKE TO A MINIMUM OF
1-FT. INTO THE GROUND LEAVING A MINIMUM OF 3-IN. PROTRUDING ABOVE THE
COMPOST FILTER SOCK.
4.INSTALL MINIMUM OF 1-FT. OVERLAP OF SILT FENCE, COMPOST FILTER SOCK, AND
HARDWARE CLOTH.
5.USE HARDWARE CLOTH WITH A MINIMUM 19 GAUGE WITH MAXIMUM 1/4-IN. MESH
OPENINGS.
6.SILT FENCE OUTLET LOCATIONS MAY VARY FROM THE APPROVED PLANS AS DIRECTED
BY THE OWNER'S INSPECTOR OR DESIGNATED REPRESENTATIVE AND BASED UPON FIELD
CONDITIONS.
7.SILT FENCE OUTLETS SHOULD BE INSTALLED AT POINTS OF CONCENTRATED FLOW AND
LOW POINTS. IF WATER IS POOLING BEHIND INSTALLED SILT FENCE AN ADDITIONAL
SILT FENCE OUTLET MAY NEED TO BE INSTALLED.
8.APPLY WOOD MULCH OR COMPOST TO 12 HEIGHT OF COMPOST FILTER SOCK.
9.AN ENERGY DISSIPATOR SHALL BE INSTALLED ON THE DOWNSTREAM SIDE OF THE SILT
FENCE OUTLET, AS NEEDED, BASED ON CONDITIONS IN THE FIELD.
FLOWFLOW FLOW6-FT. MAX.
FLOW
SILT FENCE
SILT FENCE
HARDWARE CLOTH
(SEE NOTE 5)
WOOD MULCH
(SEE NOTE 8)
HARDWARE CLOTH
(SEE NOTE 5)
PLASTIC OR WIRE TIE (TYP.)
(MIN.50-LB. TENSILE STRENGTH)
WOOD MULCH
(SEE NOTE 8)
18-IN. COMPOST FILTER SOCK
(SEE NOTE 1)
18-IN. COMPOST FILTER SOCK
(SEE NOTE 1)
STAKE (TYP.)
(SEE NOTE 3)
WOOD MULCH (SEE NOTE 8)
18-IN. COMPOST FILTER SOCK
(SEE NOTE 1)
5-FT. SELF FASTENER
ANGLE STEEL POST
(1.25 LB / LINEAR FT.)
5-FT. SELF FASTENER ANGLE STEEL POST
(1.25 LB / LINEAR FT.)
5-FT. SELF FASTENER ANGLE
STEEL POST (1.25 LB / LINEAR FT.)
A'
A
HARDWARE CLOTH
(SEE NOTE 5)
2-FT.
2-FT.
SILT FENCE OUTLET MAINTENANCE
1.INSPECT AT LEAST ONCE PER 7 CALENDAR DAYS
AND WITHIN 24 HOURS OF A RAIN EVENT
GREATER THAN OR EQUAL TO 1.0-IN. IN 24
HOURS.
2.MAKE ANY NECESSARY REPAIRS IMMEDIATELY.
3.REMOVE ACCUMULATED SEDIMENT AND ANY
DEBRIS. THE COMPOST SOCK MUST BE
REPLACED IF CLOGGED OR TORN.
4.IF PONDING BECOMES EXCESSIVE, THE SOCK
NEEDS TO BE REPLACED. THE SOCK NEEDS TO
BE REINSTALLED IF UNDERMINED OR BECOMES
DISLODGED.
5.THE COMPOST SOCK SHALL BE INSPECTED
UNTIL LAND DISTURBANCE IS COMPLETE AND
THE AREA ABOVE THE MEASURE HAS BEEN
PERMANENTLY STABILIZED.
6.SHOULD THE SILT FENCE ADJACENT TO THE
OUTLET COLLAPSE, TEAR, OR BECOME
INEFFECTIVE, REPAIR OR REPLACE IT PROMPTLY.
7.REMOVE ALL FENCING AND OUTLET MATERIALS
AND UNSTABLE SEDIMENT DEPOSITS AND
BRING THE AREA TO GRADE AND STABILIZE IT
AFTER THE CONTRIBUTING DRAINAGE AREA
HAS BEEN PROPERLY STABILIZED.
8.REFER TO NOTES & SEEDING SPECIFICATIONS
FOR COMPOST MATERIAL REQUIREMENTS AND
DISPOSAL/RECYCLING HANDLING.
6-FT. MIN.
TEMPORARY MATTING
WATERBARS = SC150BN
(SEE NOTE 3)
4-FT.
CROSS-SECTION A-A'
FLOW
12-IN. STRAW
WATTLE
(SEE NOTE 7)
WOOD MULCH
(SEE NOTE 10)
24-IN. COMPOST FILTER SOCK
(SEE NOTE 5)
5-FT. SELF FASTENER
ANGLE STEEL POST
(1.25 LB / LINEAR FT.)
2
1
18-IN.
SOIL MATERIAL
(SEE NOTE 2)
SEDIMENT PIT
(SEE NOTE 11)
FLOW
24-IN. COMPOST FILTER SOCK
(SEE NOTE 5)
2-FT.
2-FT.
SEDIMENT PIT
(SEE NOTE 11)
12-IN. STRAW WATTLE
(SEE NOTE 7)
REFER TO WATER BAR SPACING TABLE
4-FT.
6-FT. M
I
N.
TEMPORARY MATTING
WATERBARS = SC150BN
(SEE NOTE 3)2% MAX.DIVERSION SLOPE2% MAX.DIVERSION SLOPEA'
A
F
L
OW
F
L
OW
B'
B
CROSS-SECTION B-B'
SOIL MATERIAL
(SEE NOTE 2)
WATER BAR NOTES
1.INSTALL WATER BARS ON SLOPES PER TABLE BELOW:
2.CONSTRUCT WATER BARS OF COMPACTED SOIL MATERIAL (NOT TOP
SOIL). WATER BARS MUST BE A MINIMUM HEIGHT OF 18-IN.
3.TEMPORARY MATTING SHALL BE NORTH AMERICAN GREEN BIONET
SC150BN OR ENGINEER APPROVED EQUIVALENT.
4.TEMPORARY MATTING IS NOT REQUIRED ALONG WATER BAR WITHIN
LIMITS OF ACCESS ROADS AND TRAVEL LANES. ONLY PERMANENT WATER
BARS WILL HAVE TEMPORARY MATTING INSTALLED. TEMPORARY
MATTING WILL BE INSTALLED DURING THE RESTORATION PHASE.
5.USE 24-INCH FILTREXX® COMPOST FILTER SOCK OR ENGINEER APPROVED
EQUIVALENT. FILTER SOCKS SHALL BE A MINIMUM OF 12-FT. IN LENGTH.
MINIMUM OF 19-IN. HEIGHT OF COMPOST FILTER SOCK AFTER
INSTALLATION.
6.STRAW WATTLES ARE NOT TO BE USED IN PLACE OF COMPOST SOCK.
7.INSTALL MINIMUM 12-IN. STRAW WATTLE, OR ENGINEER APPROVED
EQUIVALENT, IN FRONT OF SEDIMENT PIT USE 2-IN. BY 2-IN. HARD
WOODEN STAKES TO ANCHOR IN PLACE WITH A MAXIMUM 2-FT.
SPACING.
8.USE HARDWARE CLOTH WITH A MINIMUM 19 GAUGE WITH MAXIMUM
1/4-IN. MESH OPENINGS.
9.5-FT. SELF FASTENER ANGLE STEEL POST OR 2-IN. BY 2-IN. HARD
WOODEN STAKES SHALL BE INSTALLED THROUGH THE MIDDLE OF THE
COMPOST FILTER SOCK. SPACE STAKES A MAXIMUM OF 2-FT. DRIVE THE
HARD WOODEN STAKE TO A MINIMUM OF 1-FT. INTO THE GROUND
LEAVING A MINIMUM OF 3-IN. PROTRUDING ABOVE THE COMPOST
FILTER SOCK.
10.APPLY WOOD MULCH OR COMPOST TO 12 HEIGHT OF COMPOST FILTER
SOCK.
11.THE CONTRACTOR SHALL EXCAVATE A SMALL SEDIMENT PIT (4-FT. BY
2-FT. BY 2-FT.) AT 2-FT. MINIMUM FROM AND ADJACENT TO THE
UPSTREAM SIDE OF SILT FENCE OUTLET TO INCREASE THE AMOUNT OF
SEDIMENT STORAGE.
12.AFTER PIPELINE INSTALLATION COMPLETE AND TRENCH IS BACKFILLED
WATER BARS SHOULD BE RESTORED AND STABILIZED.
13.PLACE SPOILS FROM SEDIMENT PIT EXCAVATION BEHIND SILT FENCE
J-HOOK. USE AS BACKFILL IN SEDIMENT PIT DURING FINAL CLEANUP.
WATER BAR MAINTENANCE NOTES
1.INSPECT AT LEAST ONCE PER 7 CALENDAR DAYS AND WITHIN 24 HOURS
OF A RAIN EVENT GREATER THAN OR EQUAL TO 0.5-IN. IN 24 HOURS.
2.MAKE ANY NECESSARY REPAIRS IMMEDIATELY.
3.REPLACE WATTLES AT SEDIMENT PITS AS NECESSARY.
4.REMOVE ACCUMULATED SEDIMENT AND ANY DEBRIS. THE COMPOST
SOCK MUST BE REPLACED IF CLOGGED OR TORN.
5.IF PONDING BECOMES EXCESSIVE, THE SOCK NEEDS TO BE REPLACED. THE
SOCK NEEDS TO BE REINSTALLED IF UNDERMINED OR DISLODGED.
6.THE COMPOST SOCK SHALL BE INSPECTED UNTIL LAND DISTURBANCE IS
COMPLETE AND THE AREA ABOVE THE MEASURE HAS BEEN
PERMANENTLY STABILIZED.
7.KEEP WATER BAR FREE OF DEBRIS AND OBSTRUCTIONS. THE
CONTRACTOR MAY NEED TO REDRESS OR RESHAPE WATER BARS
PERIODICALLY THROUGHOUT THE PROJECT.
8.SEED AND MULCH PERMANENT WATER BARS FOLLOWING
CONSTRUCTION.
9.SHOULD THE SILT FENCE ADJACENT TO THE OUTLET COLLAPSE, TEAR, OR
BECOME INEFFECTIVE, REPAIR OR REPLACE IT PROMPTLY.
10.REMOVE ALL FENCING AND OUTLET MATERIALS AND UNSTABLE
SEDIMENT DEPOSITS AND BRING THE AREA TO GRADE AND STABILIZE IT
AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN PROPERLY
STABILIZED.
11.REMOVE SEDIMENT ACCUMULATED WITHIN THE SEDIMENT PIT AS
NEEDED TO MAINTAIN ADEQUATE STORAGE.
WATER BAR SPACING
SLOPE (%)DISTANCE (FT.)
< 5 125
5 - 10 100
10 - 20 75
20 - 35 50
> 35 25
12-IN. STRAW WATTLE
(SEE NOTE 7)
WOOD MULCH
(SEE NOTE 10)
24-IN. COMPOST FILTER SOCK
(SEE NOTE 5)
SEDIMENT PIT
(SEE NOTE 11)
FLOW
2-FT.
2-FT.
CROSS-SECTION C-C'
C'
C
SILT FENCE
(TYP.)
WATER BAR PLAN VIEW
2H:1V
2H:1V
2H:1V
2H:1V
SEDIMENT PIT
SPOIL PILE
(SEE NOTE 13)
SEDIMENT PIT SPOIL PILE
(SEE NOTE 13)DRAWING PATH: N:\Projects\2020\036 Broad River Bank Stabilization\DWG\FDPA\733520036_DETAILS.dwgDRAWING NUMBER
PROJECT NUMBER BYDESCRIPTIONDATENO.CHKAPV9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
[phone]
FLOODPLAIN DEVELOPMENT PERMIT APPLICATIONBROAD RIVER BANK STABILIZATION PROJECTRUTHERFORD COUNTY, NORTH CAROLINA7335-20-036
5DETAILS (2 OF 4)0LRMELHDRGISSUED FOR PERMITTING & APPROVAL07/29/2020ENGINEERING FIRM
LICENSE NUMBER: F-0176
3
5
SILT FENCE
SCALE: N.T.S.
4
5
COMPOST FILTER SOCK
SCALE: N.T.S.
5
5
SILT FENCE OUTLET
SCALE: N.T.S.6
5
WATERBAR
SCALE: N.T.S.7
TABLE: FILTER BAG MATERIAL
PROPERTY TEST METHOD MINIMUM STANDARD
AVG. WIDE WIDTH
STRENGTH ASTM D-4884 60 LB/IN
GRAB TENSILE ASTM D-4632 205 LB
PUNCTURE ASTM D-4833 110 LB
MULLEN BURST ASTM D-3786 350 PSI
UV RESISTANCE ASTM D-4355 70%
AOS % RETAINED ASTM D-4751 80 SIEVE
DISCHARGE HOSE
CLAMPS
PUMP
INTAKE
HOSE
HEAVY DUTY LIFTING STRAPS
(RECOMMENDED)
DISCHARGE HOSE
CLAMPS
INTAKE
HOSE
PUMP
12-INCH FILTREXX®
COMPOST FILTER SOCK OR
ENGINEER APPROVED EQUIVALENT
GEOTEXTILE FABRIC
GEOTEXTILE FABRIC CROSS SECTION VIEW
PLAN VIEW
FILTER BAG NOTES
1.LOW VOLUME FILTER BAGS SHALL BE MADE FROM NON-WOVEN GEOTEXTILE MATERIAL
SEWN WITH HIGH STRENGTH, DOUBLE STITCHED "J" TYPE SEAMS. THEY SHALL BE
CAPABLE OF TRAPPING PARTICLES LARGER THAN 150 MICRONS. HIGH VOLUME FILTER
BAGS SHALL BE MADE FROM WOVEN GEOTEXTILES THAT MEET THE FOLLOWING
STANDARDS:
2.FILTER BAGS SHALL BE REPLACED WHEN THEY REACH CAPACITY. SPARE BAGS SHALL BE
KEPT AVAILABLE FOR REPLACEMENT OF THOSE THAT HAVE FAILED OR ARE FILLED. ALL
BAGS SHALL BE WITHIN THE APPROVED LIMITS OF DISTURBANCE. DISCHARGE TO
APPROPRIATE EROSION AND SEDIMENTATION CONTROL MEASURE.
3.FILTER BAGS SHALL NOT BE PLACED ON SLOPES GREATER THAN 5% WITHOUT
APPROPRIATE STABILITY MEASURES. PLACE FILTER BAGS ON EXISTING WELL VEGETATED
AREAS. IF DISCHARGE LOCATION IS BARE SOIL PLACE FILTER BAG ON GEOTEXTILE
FABRIC.
4.THE PUMP DISCHARGE HOSE SHALL BE INSERTED INTO THE BAGS IN THE MANNER
SPECIFIED BY THE MANUFACTURER AND SECURELY CLAMPED. A PIECE OF PVC PIPE IS
RECOMMENDED FOR THIS PURPOSE.
5.THE PUMPING RATE SHALL BE NO GREATER THAN 750 GPM OR 1/2 THE MAXIMUM
SPECIFIED BY THE MANUFACTURER, WHICHEVER IS LESS. PUMP INTAKES SHALL BE
FLOATING AND SCREENED.
6.FILTER BAGS SHALL BE INSPECTED DAILY FOR CAPACITY AND RIPS. IF ANY PROBLEM IS
DETECTED, PUMPING SHALL CEASE IMMEDIATELY AND NOT RESUME UNTIL THE
PROBLEM IS CORRECTED.
7.WATER PUMPED OUT OF TRENCH SHALL NOT BE DISCHARGED INTO WATERWAYS.
WATER SHALL BE DISCHARGED INTO A FILTER BAG OR DEWATERING STRUCTURE
LOCATED IN A WELL VEGETATED AREA AT LEAST 50-FEET AWAY FROM A STREAM OR
WETLAND.
8.INSTALL 12-INCH COMPOST FILTER SOCK ON THREE DOWNGRADIENT SIDES OF FILTER
BAG.
REFERENCE: DETAIL BASED ON PENNSYLVANIA DEPARTMENT OF ENVIRONMENTAL
PROTECTION (PA DEP) STANDARD DETAILS.
FILTER BAG
FILTER BAG
TEMPORARY SLOPE MATTING NOTES
1.PREPARE SOIL BEFORE INSTALLING ROLLED EROSION CONTROL
PRODUCTS (RECPS), INCLUDING ANY NECESSARY APPLICATION OF
LIME, FERTILIZER, AND SEED.
2.BEGIN AT THE TOP OF THE SLOPE BY ANCHORING THE RECPS IN A
6-IN. DEEP X 6-IN. WIDE TRENCH WITH APPROXIMATELY 12-IN. OF
RECPS EXTENDED BEYOND THE UP-SLOPE PORTION OF THE
TRENCH. ANCHOR THE RECPS WITH A ROW OF STAPLES/STAKES
APPROXIMATELY 12-IN. APART IN THE BOTTOM OF THE TRENCH.
BACKFILL AND COMPACT THE TRENCH AFTER STAPLING. APPLY
SEED TO THE COMPACTED SOIL AND FOLD THE REMAINING 12-IN.
PORTION OF RECPS BACK OVER THE SEED AND COMPACTED SOIL.
SECURE RECPS OVER COMPACTED SOIL WITH A ROW OF
STAPLES/STAKES SPACED APPROXIMATELY 12-IN. APART ACROSS
THE WIDTH OF THE RECPS.
3.ROLL THE RECPS DOWN OR HORIZONTALLY ACROSS THE SLOPE
BASED ON ENVIRONMENT INSPECTOR. RECPS WILL UNROLL WITH
APPROPRIATE SIDE AGAINST THE SOIL SURFACE. ALL RECPS MUST
BE SECURELY FASTENED TO SOIL SURFACE BY PLACING
STAPLES/STAKES IN APPROPRIATE LOCATIONS AS SHOWN IN THE
STAPLE PATTERN GUIDE.
4.THE EDGES OF PARALLEL RECPS MUST BE STAPLED WITH
APPROXIMATELY 2 TO 5-IN. OVERLAP DEPENDING ON THE RECPS
TYPE.
5.CONSECUTIVE RECPS SPLICED DOWN THE SLOPE MUST BE END
OVER END (SHINGLE STYLE) WITH AN APPROXIMATE 3-IN.
OVERLAP. STAPLE THROUGH OVERLAPPED AREA, APPROXIMATELY
12-IN. APART ACROSS ENTIRE RECPS WIDTH.
6.IN LOOSE SOIL CONDITIONS, THE USE OF STAPLE OR STAKE
LENGTHS GREATER THAN 6-IN. MAY BE NECESSARY TO PROPERLY
SECURE THE RECP'S.
7.TEMPORARY MATTING SHALL BE NORTH AMERICAN GREEN
BIONET SC150BN OR ENGINEER APPROVED EQUIVALENT.
TEMPORARY SLOPE MATTING MAINTENANCE
1.INSPECT AT LEAST ONCE PER 7 CALENDAR DAYS AND WITHIN 24
HOURS OF A RAIN EVENT GREATER THAN OR EQUAL TO 1.0-IN IN
24 HOURS.
2.MAKE ANY NECESSARY REPAIRS IMMEDIATELY.
3.GOOD CONTACT WITH THE GROUND MUST BE MAINTAINED, AND
EROSION MUST NOT OCCUR BENEATH THE RECP.
4.ANY AREAS OF THE RECP THAT ARE DAMAGED OR NOT IN CLOSE
CONTACT WITH THE GROUND SHALL BE REPAIRED AND STAPLED.
5.IF EROSION OCCURS DUE TO POORLY CONTROLLED DRAINAGE,
THE PROBLEM SHALL BE FIXED AND THE ERODED AREA
PROTECTED.
6.MONITOR AND REPAIR THE RECP AS NECESSARY UNTIL GROUND
COVER IS ESTABLISHED.
REF:DETAIL BASED ON NCDEQ EROSION AND SEDIMENT CONTROL
PLANNING AND DESIGN MANUAL, CHAPTERS 6 AND 8 REVISED, MAY
2013
ISOMETRIC VIEW
EXTEND MATTING
MINIMUM OF 3-FT. FROM
TOE OF SLOPE
8-
F
T
.

W
I
D
E
TOP OF SLOPE
END OVERLAP SEAM
(SEE NOTE 5)
3-IN.
12-IN.
6-IN.
6-IN.
START ANCHOR TRENCH
(SEE NOTE 2)
SIDE OVERLAP SEAM
(SEE NOTE 4)
2 TO 5-IN.
SOIL PREPARATION
(SEE NOTE 1)
6-FT.
3-FT.
3.3-FT.
4:1 SLOPES
0.7 STAPLES PER SQ.YD.
2 TO 5-IN.
6-FT.
3-FT.
3:1 SLOPES
1.15 STAPLES PER SQ.YD.
2 TO 5-IN.2 TO 5-IN.2 TO 5-IN.
1.6-FT.
3.3-FT.
2:1 SLOPES
1.7 STAPLES PER SQ.YD.
4-FT.
2 TO 5-IN.2 TO 5-IN.
2-FT.
1.6-FT.
3.3-FT.
1:1 SLOPES
3.4 STAPLES PER SQ.YD.
4-FT.
2 TO 5-IN.2 TO 5-IN.
2-FT.
3.3-FT.
1.6-FT.
TEMPORARY MATTING
SLOPES = SC150BN
(SEE NOTE 7)
STAPLE PATTERNS
EXISTING PUBLIC ROADDITCHCENTERLINE12-FT. (MIN.)
50-FT. (MIN.)
10-FT. (MIN.)
TEMPORARY CULVERT (IF NECESSARY)
8 OZ. NON-WOVEN GEOTEXTILE
2 TO 3-IN. DIAMETER WASHED STONE
12-FT. (MIN.)
6-IN. (MIN.)2 TO 3-IN. DIAMETER
WASHED STONE
1-FT.
(MIN.)8 OZ. NON-WOVEN
GEOTEXTILE
CROSS-SECTION A-A'
EXISTING
PUBLIC ROAD
2 TO 3-IN. DIAMETER
WASHED STONE
8 OZ. NON-WOVEN
GEOTEXTILE
TEMPORARY CULVERT (IF NECESSARY)
CONSTRUCTION ENTRANCE NOTES
1.DUE TO SITE CONSTRAINTS THE WIDTH AND LENGTH MAY BE ADJUSTED
BASED ON CONDITIONS IN THE FIELD.
2.APPROPRIATE SIGNAGE WILL BE POSTED ALONG THE ROAD TO INFORM THE
GENERAL PUBLIC OF POTENTIAL CONSTRUCTION TRAFFIC PER
REQUIREMENTS.
CONSTRUCTION ENTRANCE MAINTENANCE
1.INSPECT TEMPORARY CONSTRUCTION ENTRANCES AT LEAST ONCE PER 7
CALENDAR DAYS AND WITHIN 24 HOURS OF A RAIN EVENT GREATER THAN
OR EQUAL TO 1.0-IN IN 24 HOURS. INSPECT MORE FREQUENTLY DURING
PERIODS OF HEAVY USE.
2.THE ENTRANCE WILL BE MAINTAINED IN A CONDITION THAT WILL PREVENT
TRACKING OR FLOWING OF SEDIMENT ONTO EXISTING ROADWAYS.
SEDIMENT TRACKED, SPILLED, DROPPED OR OTHERWISE DEPOSITED ONTO
ROADWAYS WILL BE SWEPT UP AS SOON AS PRACTICAL AND PLACED BACK
WITHIN THE APPROVED DISTURBED AREA.
3.IF EXCESS SEDIMENT HAS CLOGGED THE STONE, THE ENTRANCE WILL BE
TOPDRESSED WITH NEW STONE AS NEEDED. REPLACEMENT OF THE STONE
MAY BECOME NECESSARY WHEN THE STONE BECOMES ENTIRELY FILLED
WITH SEDIMENT AND MUD.
4.THE CONSTRUCTION ENTRANCE AND CULVERT (IF PRESENT), WILL BE
REMOVED WHEN CONSTRUCTION ACTIVITIES CEASE ON THE PROJECT. THE
REMOVED STONE AND SEDIMENT FROM THE ENTRANCE WILL BE HAULED
OFF-SITE AND DISPOSED OF PROPERLY.
5.UPON REMOVAL OF THE CONSTRUCTION ENTRANCE, THE CONTRACTOR
SHALL BRING THE AREA TO ORIGINAL GRADE AND STABILIZE IT. IF A
TEMPORARY CULVERT WAS UTILIZED IN CONJUNCTION WITH THE
CONSTRUCTION ENTRANCE, THE CONTRACTOR SHALL INSTALL TEMPORARY
MATTING AND/OR WATTLES WITHIN ROADSIDE SWALE/DITCH.
CONSTRUCTION ENTRANCE PLAN VIEW
CONSTRUCTION ENTRANCE SECTION VIEW
BACKFILL MATERIAL
A'
A
1-FT.
(MIN.)EDGE OF PAVEMENTEXISTING EMBANKMENT OR
NATURAL BANK MATERIAL
CONSTRUCTION NOTES:
1.EXCAVATION BASE TO BE EVALUATED BY THE ENGINEER PRIOR TO
BACKFILLING.
2.REMOVE SOFTENED NEAR SURFACE SOILS AND BACKFILL WITH
COMPACTED COHESIVE STRUCTURAL FILL MATERIAL AS SHOWN ON
DETAIL 1, SHEET 4.
3.PERFORM TEMPORARY DEWATERING TO MINIMUM DEPTH OF 2 TO
3-FEET OR AS REQUIRED TO HELP PREVENT SOFTENING OF SOIL
SUBGRADE. DEWATERING SHOULD BE PERFORMED UNTIL THE FILL
HEIGHT HAS REACHED A MINIMUM HEIGHT OF 3-FEET ABOVE THE
WATER SURFACE. TEMPORARY DEWATERING MAY CONSIST OF
PUMPING FROM SUMPS, DITCHES, WELL POINTS, OR OTHER MEANS.
PUMPING SHOULD BE CONTINUOUS UNTIL FILL PLACEMENT IS
COMPLETE.
4.STRUCTURAL FILL SHALL BE BENCHED INTO THE EXISTING AND
OVER-EXCAVATED GRADES OUTSIDE EROSION AREA DURING FILL
PLACEMENT WITH MINIMUM 3-FEET HORIZONTAL BY MAXIMUM
2-FEET VERTICAL BENCHES TO PROMOTE BONDING.
5.BACKFILL EXCAVATION WITH SELECT STRUCTURAL FILL PER THE
TECHNICAL SPECIFICATIONS.
GENERAL NOTES:
1.S&ME HAS NOT VERIFIED THE LOCATION OF EXISTING UTILITIES. THE
CONTRACTOR SHALL BE RESPONSIBLE FOR FIELD VERIFYING THE
LOCATION OF ALL UTILITIES IN THE WORK AREA PRIOR TO
CONSTRUCTION AND IS SOLELY RESPONSIBLE FOR SITE
CONSTRUCTION SAFETY.
COMPACTED SELECT FILL LIFTS,
MAX. 8-IN LOOSE LIFT COMPACTED
TO MIN. 95% STANDARD PROCTOR
HEIGHT
VARIES
3-FT. (TYP.)
2-FT. (TYP.)DRAWING PATH: N:\Projects\2020\036 Broad River Bank Stabilization\DWG\FDPA\733520036_DETAILS.dwgDRAWING NUMBER
PROJECT NUMBER BYDESCRIPTIONDATENO.CHKAPV9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
[phone]
FLOODPLAIN DEVELOPMENT PERMIT APPLICATIONBROAD RIVER BANK STABILIZATION PROJECTRUTHERFORD COUNTY, NORTH CAROLINA7335-20-036
6DETAILS (3 OF 4)0LRMELHDRGISSUED FOR PERMITTING & APPROVAL07/29/2020ENGINEERING FIRM
LICENSE NUMBER: F-0176
7
6
FILTER BAG
SCALE: N.T.S.
8
6
SLOPE MATTING
SCALE: N.T.S.
9
6
CONSTRUCTION ENTRANCE
SCALE: N.T.S.
10
6
SLOPE BENCHING DETAIL
SCALE: N.T.S.7
PUMP BY-PASS NOTES
1.REFER TO AUTHORIZED PERMITS FOR ADDITIONAL LOCAL, STATE, AND FEDERAL REQUIREMENTS.
2.MECHANICAL EQUIPMENT SHALL NOT OPERATE WITHIN STREAMS/RIVERS WITHOUT THE USE OF A
TEMPORARY DAM SYSTEM.
3.INSTALL TEMPORARY WATER-FILLED DAM (OR ENGINEER APPROVED EQUIVALENT) WHERE SHOWN ON
THE PLAN VIEW DRAWINGS.
4.CONTRACTOR SHALL DEWATER AREA WITHIN DAM SETUP AND ENSURE TIGHT SEAL OF DAMS PRIOR TO
BANK CONSTRUCTION. CONTRACTOR SHALL BE RESPONSIBLE FOR PASSING RESIDUAL WATER WITHIN
DAMNED AREA, WHICH IS TO BE FILTERED THROUGH A FILTER BAG PLACED IN CONJUNCTION WITH
APPROPRIATE E&SC MEASURES. INSTALL DOUBLE ROW 12-INCH COMPOST FILTER SOCK ON THREE
DOWNGRADIENT SIDES OF FILTER BAG. DEWATERING PUMPS SHALL BE PLACED WITHIN SECONDARY
CONTAINMENT.
5.SCREEN PUMP INTAKES TO MINIMIZE ENTRAINMENT OF AQUATIC LIFE. PLACE PUMP INTAKE IN SUMP
HOLE/POOL WITHIN DAMNED AREA. PLACE BYPASS HOSE OUTSIDE OF STREAM BANKS WITH DISCHARGE
DOWNSTREAM OF DAM BEFORE COMMENCING BYPASS. TAKE MEASURES TO PREVENT STREAMBED
SCOUR AT PUMP DISCHARGE THROUGH THE USE OF AN ENERGY DIFFUSER. TAKE REASONABLE MEASURES
TO PREVENT INTAKE FROM SUCTIONING THE STREAM SUBSTRATE.
6.THE PUMP(S) SHALL BE OF SUFFICIENT SIZE TO CONVEY NORMAL STREAM FLOW. HAVE STANDBY PUMPS
AND GENERATORS CAPABLE OF HANDLING 100% OF ANTICIPATED FLOW ON-SITE IN CASE OF PUMP
FAILURE OR A RAIN EVENT. CONTINUOUSLY MONITOR THE DAM AND PUMPS TO ENSURE PROPER
OPERATION THROUGHOUT THE BANK CONSTRUCTION. ALL PUMPS SHALL BE PLACED WITHIN SECONDARY
CONTAINMENT TO REDUCE POTENTIAL FOR FUEL SPILLS.
7.LIMIT THE REMOVAL OF VEGETATION TO THE CONSTRUCTION EASEMENT AREA. ONLY HAND CLEARING IS
ALLOWED ON STREAM/RIVER BANKS AND WITHIN 10-FT. OF TOP OF BANK.
8.BANK CONSTRUCTION SHOULD BE CONDUCTED "IN THE DRY" DURING LOW FLOW CONDITIONS. LOCAL
WEATHER CONDITIONS SHALL BE MONITORED IN ORDER TO AVOID ANTICIPATED RAINFALL EVENTS
DURING, OR IMMEDIATELY FOLLOWING, CONSTRUCTION ACTIVITIES.
9.BANK CONSTRUCTION SHALL BE EXECUTED IN THE MINIMAL AMOUNT OF TIME NECESSARY; BEGIN IN
RIVER WORK IN THE MORNING, INSTALLATION AND RESTORATION SHALL OCCUR WITHIN A 24-HOUR TO
48-HOUR PERIOD TO THE FULLEST EXTENT PRACTICAL. IN NO INSTANCE SHOULD INSTALLATION AND
RESTORATION EXCEED 48 HOURS WITHOUT APPROVAL OF THE ENVIRONMENTAL MONITOR.
10.CONTRACTOR SHALL ATTEMPT TO SEGREGATE STREAM BED SUBSTRATE FROM SUBGRADE.
11.NO WASTES, SPOILS, SOLIDS OR FILLS WILL BE PLACED WITHIN RIVERS. STREAMS, WETLANDS OR RIPARIAN
AREAS BEYOND THE LIMITS OF THOSE DEPICTED ON THE DRAWINGS.
12.ONCE BANK CONSTRUCTION IS COMPLETED, AND SUBGRADE HAS BEEN BACKFILLED APPLY STREAM/RIVER
SUBSTRATE, TO THE FULLEST EXTENT PRACTICAL.
13.CONSTRUCTION TO TAKE PLACE ON ONLY ONE (1) RIVER BANK AT A TIME.
14.ADDITIONAL SITE SPECIFIC MEASURES MAY BE NECESSARY IN ORDER TO PROTECT AFFECTED
STREAMS/RIVERS AND PREVENT VIOLATIONS OF WATER QUALITY STANDARDS.
RIVER FLOW
RIVER FLOW
RIVER FLOW
2H:1V(APPROX.) DEWATERING
PUMP WITH SECONDARY
CONTAINMENT
TEMPORARY WATER-FILLED DAM
(OR ENGINEER APPROVED EQUIVALENT)
APPROX. RIVERBANK TOE OF SLOPE
(CONSTRUCTION AREA)
FILTER BAG
RIVER BANK
DEWATERING
HOSE
SCREEN
INTAKE
TEMPORARY WORKSPACE
(SEE NOTE 8).DRAWING PATH: N:\Projects\2020\036 Broad River Bank Stabilization\DWG\FDPA\733520036_DETAILS.dwgDRAWING NUMBER
PROJECT NUMBER BYDESCRIPTIONDATENO.CHKAPV9751 SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
[phone]
FLOODPLAIN DEVELOPMENT PERMIT APPLICATIONBROAD RIVER BANK STABILIZATION PROJECTRUTHERFORD COUNTY, NORTH CAROLINA7335-20-036DETAILS (4 OF 4)0LRMELHDRGISSUED FOR PERMITTING & APPROVAL07/29/2020ENGINEERING FIRM
LICENSE NUMBER: F-0176
11
7
DAM DEWATERING - DURING CONSTRUCTION
SCALE: N.T.S.
7 7