20160285 Ver 3_Modification Request_20201207

Staff Review
Does this application have all the attachments needed to accept it into the review process?*
r Yes r No
ID#*
20160285
Version* 3
Is this project a public transportation project?* r Yes
r No
Reviewer List:* Rick Trone:eads\rvtrone
Select Reviewing Office:* Central Office - [phone]
Does this project require a request for payment to be sent?*
r
Yes
r
No
How much is r $240.00
owed? * r $570.00

Project Submittal Form
Please note: fields marked with a red asterisk below are required. You will not be able to submit the form until all
mandatory questions are answered.
Project Type: * r
For the Record Only (Courtesy Copy)
r
New Project
r
Modification/New Project with Existing ID
r
More Information Response
r
Other Agency Comments
r
Pre -Application Submittal
r
Re-Issuance\Renewal Request
r
Stream or Buffer Appeal
Pre -Filing Meeting Information
Before submitting this form please ensure you have submitted the Pre -Filing Meeting Request Form as we will not
be able to accept your application without this important first step. The Pre -Filing Meeting Request Form is used in
accordance with 40 C.F.R. Section 121.4(a) "At least 30 days prior to submitting a certification request, the project
proponent shall request a pre -filing meeting with the certifying agency" and in accordance with 40 C.F.R. Section
121.5(b)(7), and (c)(5) all certification requests shall include documentation that a pre -filing meeting request was
submitted to the certifying authority at least 30 days prior to submitting the certification request. Click here to read
more information on when this form is needed prior to application submission or here to view the form.
Attach documentation of Pre -Filing Meeting Request here:
SDP17000-Pre-filing Mtg Not Required EM.pdf
Date for Meeting Request 10/29/2020
ID# 2016085 Version 3
Project Contact Information
Name: Jennifer Burdette
Who is subrritting the information?
Email Address: [e-mail]
Project Information
462.79KB
Existing ID #: Existing Version:
20160285 2
20170001(no dashes) 1
Project Name: Oak Pointe Residential Subdivision
Is this a public transportation project?
r Yes
r No
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
r Yes r No r Unknown
County (ies)

Wake
Please upload all files that need to be submited.
Oick the upload button or drag and drop files here to attach document
SDP17000-SS Stabilization Permit Mod
4.61 MB
Pkg_Optimized.pdf
SDP17000-IP Permit Modification Ltr-
2.83MB
Stabilization.pdf
Only pdf or krm files are accepted.
Describe the attachments
or comments:
Individual Permit modification request for emergency bank stabilization and USACE modification approval
letter.
Sign and Submit
W By checking the box and signing box below, I certify that:
■ I, the project proponent, hereby certifies that all information contained herein is true, accurate, and complete to
the best of my knowledge and belief.
■ I, the project proponent, hereby requests that the certifying authority review and take action on this CWA 401
certification request within the applicable reasonable period of time.
■ I agree that submission of this online 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 online form.
Signature:
Submittal Date: Is filled in autonatically.

MODIFICATION REQUEST > SDP-17000
2905 Meridian Parkway, Durham, NC 27713 / 919. 361. 5000 creating experiences through experience

November 16, 2020

Mr. James Lastinger
Raleigh Regulatory Field Office
US Army Corps of Engineers
3334 Heritage Trade Drive, 105
Wake Forest, NC 27587

Mr. Paul Wojoski
401 & Buffer Permitting Branch
Division of Water Resources
Archdale Bldg., 9th Floor
512 N Salisbury Street
Raleigh, NC 27604

RE: Individual Permit/Certification & Buffer Authorization Modification Request
Oak Pointe Residential Development
USACE AID SAW-2016-00095/DWR Project #16-0285
Apex, Wake County, NC
SDP-17000

Dear Mr. Lastinger and Mr. Wojoski,

On behalf of Lennar Carolinas, LLC, McAdams is requesting a modification of the Individual Permit (IP) and Water
Quality Certification (WQC) for the Oak Pointe Residential Development. This 58-acre project is located on the south
side of Old Jenks Road, approximately 1,000 feet east of the intersection of Old Jenks Road and West Williams Street
in Apex, Wake County.

After the permit was issued, a sanitary sewer crossing, shown in Impact Area E from the original application (Original
Overall Impact Map and Impact Area E Exhibit attached), was changed to an aerial crossing to connect to the existing
sewer. The meander of the stream at the crossing location has increased dramatically in a short period of time after
construction. The picture below shows the stream erosion at the pier supporting the aerial SS line. McAdams has
developed the attached repair/stabilization plan (E1-E6) using a combination of non-natural armoring techniques
and natural channel design. The Town of Apex has reviewed this plan and requested expedited approval to prevent
a sanitary sewer line failure.

MODIFICATION REQUEST > SDP-17000
creating experiences through experience 2 of 2
Photo 1: Stream eroding sanitary sewer support pier

Modification of the IP and WQC are necessary to authorize an additional 95 LF of permanent stream impact and 841
SF of Zone 1 buffer impact (area of Zone 1 within limit of disturbance) to implement the stabilization plan. The
existing sanitary sewer easement will be utilized to access the repair area. A pre-filing meeting request was
submitted to DWR on October 29, 2020. At the end of the 30-day pre-filing meeting period, a check for modification
of the 401 Individual Water Quality Certification will be provided along with any other additional information
requested. As recent heavy rains have exacerbated the erosion, Lennar intends to proceed the with repair upon
approval from the USACE and will obtain a 401 modification after-the-fact once the pre-filing meeting requirement
is satisfied. Please do not hesitate to contact me if you have any questions about the stabilization plan or impacts
requested.

Sincerely,
MCADAMS

Jennifer Burdette, PWS
Senior Environmental Scientist, Water Resources

Attachments:
Lennar Agent Authorization Form
Town of Apex Agent Authorization Form
Original Impact Map Overall & Impact Area E
Impact Drawing & Details (E1-E6)

cc: Ryan Akers, McAdams
M WADAMS AGENT AUTHORIZATION FORM
All Blanks To Be Filled In By The Current Applicant
FIELDS WITH *ARE REQUIRED
PIN:
0732785077
Name:
Lennar Carolinas, LLC; Landon Walls, Director of Land Development
Address:
1100 Perimeter Park Dr, Ste 112, Morrisville, NC 27560
*Phone:
•J
*Email:
'����.�120z.
• /UILrA 49 le4we cowl
Project Name:
Oak Pointe Residential Subdivision
Project Number:
SDP-17000
Project Manager:
Ryan Akers/Jennifer Burdette
US Army Corps of Engineers —Wilmington District
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest, NC 27587
Re: Wetlands Related Consulting and Permitting
To Whom It May Concern:
NC Division of Water Resources
401 & Buffer Permitting Branch
512 N. Salisbury Street
Raleigh, NC27604
I hereby designate and authorize The John R. McAdams Company, Inc. to act on my behalf as my agent in obtaining
verification of wetland delineations and processing of permit applications for the project listed above.
I, the undersigned, a duly authorized owner of record of the property/properties identified herein, do authorize
representatives ofthe Wilmington District, U.S. Army Corps of Engineers (Corps) and NC Division of Water Resources
to enter upon the property herein described for the purpose of conducting on -site investigation and issuing a
determination associated with Waters of the U.S. subject to Federal jurisdiction under Section 404 of the Clean
Water Act/Section 10 of the Rivers and Harbors Act of 1899 and/or Waters of State and/or Riparian Buffer Rules.
This notification supersedes any previous correspondence concerning the agent for this project.
NOTICE: This authorization, for liability and professional courtesy reasons, is valid only for government ofFicials to
enter the property when accompanied by The John R. McAdams Company, Inc. staff.
Landon Walls
*Print Applicant
Director of Land Development
Title (if applicable)
*Signature
`Dat
creating experiences through experience 2905 Meddian Parkway, Durham, NC / 919. 36t. 5000

M MCADAMS AGENT AUTHORIZATION FORM
All Blanks To Be Filled In By The Current rropertV Owner
FIELDS WITH *ARE REQUIRED
PIN:
0732783155
Name:
Town of Apex
Address:
P O Box 250, Apex, NC 27502
*Phone:
4q ^ 3I)0
*Email:
D2a/. *V0W: S AP6KAX
Project Name:
Oak Pointe Residential Subdivision
Project Number:
SDP-17000
Project Manager:
Ryan Akers/Jennifer Burdette
US Army Corps of Engineers —Wilmington District
Raleigh Regulatory Field Office
3331 Heritage Trade Drive, Suite 105
Wake Forest, NC 27587
Re: Wetlands Related Consulting and Permitting
NC Division of Water Resources
401 & Buffer Permitting Branch
512 N. Salisbury Street
Raleigh, NC 27604
To Whom It May Concern:
I hereby designate and authorize The John R. McAdams Company, Inc. to act on my behalf as my agent in obtaining
verification of wetland delineations and processing of permit applications for the project listed above.
I, the undersigned, a duly authorized owner of record of the property/properties identified herein, do authorize
representatives of the Wilmington District, U.S. Army Corps of Engineers (Corps) and NC Division of Water Resources
to enter upon the property herein described forthe purpose of conducting on -site investigation and issuing a
determination associated with Waters of the U.S. subject to Federal jurisdiction under Section 404 of the Clean
Water Act/Section 10 of the Rivers and Harbors Act of 1899 and/or Waters of State and/or Riparian Buffer Rules.
This notification supersedes any previous correspondence concerning the agent for this project.
NOTICE: This authorization, for liability and professional courtesy reasons, is valid only for government officials to
enter the property when accompanied by The John R. McAdams Company, I staff.
T06VA GP /gipPX �Adm -
*Print Property Owner *Signs ure
/6�(✓r ,t1nGre f %/�d
Title (if applicable)° *Date
zo
creating experiences through experience 2905 Meddian Parkway, Durham, NC / 919. 351. 5000

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X:\Projects\SDP\SDP-17000\Storm\Aerial Sewer Stabilization\Current Drawings\SDP17000-STR.dwg, 11/2/2020 3:10:25 PM, Garcia, Kelli
OAK POINTE
IMPACT DRAWINGS
EXHIBIT 1
APEX, NORTH CAROLINA
PROJECT NO.SDP-17000
FILENAME SDP17000-STR
CHECKED BY RAS
DRAWN BY KEG
SCALE 1"=20'
DATE 11.02.2020
The John R. McAdams Company, Inc.
2905 Meridian Parkway
Durham, NC 27713
phone [phone]
fax [phone]
license number: C-0293, C-187
www.mcadamsco.com
PLAN INFORMATIONGRAPHIC SCALE01020401 inch = 20 ft.SITE LEGENDGENERAL NOTES:1.ALL DIMENSIONS AND GRADES SHOWN ON THE PLANS SHALL BE FIELD VERIFIED BY THECONTRACTOR PRIOR TO CONSTRUCTION. CONTRACTOR SHALL NOTIFY THE OWNER ANDDESIGN ENGINEER IF ANY DISCREPANCIES EXIST PRIOR TO PROCEEDING WITHCONSTRUCTION FOR NECESSARY PLAN OR GRADE CHANGES. NO EXTRA COMPENSATIONSHALL BE PAID TO THE CONTRACTOR FOR ANY WORK DONE DUE TO DIMENSIONS ORGRADES SHOWN INCORRECTLY ON THESE PLANS IF SUCH NOTIFICATION HAS NOT BEENGIVEN.2.THE EXISTING GRADE SHOWN IN THIS DRAWING IS BASED ON SURVEY BY THE JOHN R.MCADAMS CO. CONDUCTED FEBRUARY 2020. CONTRACTOR TO RESTORE THE TOE OF THECHANNEL BANK TO APPROXIMATE LOCATION SHOWN ON THESE PLANS. CONTRACTORSHALL TIE PROPOSED TOP OF BANK BASED ON SITE CONDITIONS AT TIME OFCONSTRUCTION.
\\johnrmcadams.com\dfsrt1\Projects\SDP\SDP-17000\Storm\Aerial Sewer Stabilization\Current Drawings\SDP17000-STR.dwg, 10/23/2020 11:42:12 AM, Stubbs, Rebecca
OAK POINTE
BULLETIN DRAWINGS
EXHIBIT 2
APEX, NORTH CAROLINA
PROJECT NO.SDP-17000
FILENAME SDP17000-STR
CHECKED BY RAS
DRAWN BY KEG
SCALE N.T.S.
DATE 10.23.2020
The John R. McAdams Company, Inc.
2905 Meridian Parkway
Durham, NC 27713
phone [phone]
fax [phone]
license number: C-0293, C-187
www.mcadamsco.com
PLAN INFORMATIONBOULDER TOE REVETMENTN.T.S.SECTION VIEWGENERAL NOTES:1.FOOTER BOULDERS SHOULD BE FLAT AND RECTANGULAR AND PROVIDE AN EVEN SURFACE FOR STACKING.2.BOULDERS SHALL BE ANGULAR, FLAT, OR CUBED ROCK. INDIVIDUAL ROCK FRAGMENTS SHALL BE DENSE,SOUND, AND FREE FROM CRACKS, SEAMS OR OTHER DEFECTS CONDUCIVE TO ACCELERATED WEATHERING.NO CONCRETE, MAN-MADE ROCKS, OR SOFT ROCKS SHALL BE USED FOR THE CONSTRUCTION OF THE BOULDERTOE REVETMENT.3.FOOTINGS SHOULD BE LEVEL. THE LONGEST AXIS OF THE BOULDER SHOULD BE ORIENTED AT A NEAR VERTICALANGLE.4.BOULDERS SHALL BE PLACED BY MECHANICAL OR OTHER ACCEPTABLE METHODS, MINIMIZING VOIDS. THEBOULDERS SHALL BE PLACED TO FORM A NEAT AND UNIFORM SURFACE AREA. NO MORTAR IS PERMITTED.6.COMPACTED FILL MATERIAL SHALL BE CONSIDERED SUITABLE SOIL MATERIAL, FREE OF ROOTS, STICKS, ROCKS,BRUSH, LITTER AND OTHER OBJECTIONABLE MATERIAL.7.NO SIGNIFICANT VOIDS SHOULD EXIST BETWEEN ADJOINING FOOTER AND TOP ROCK. IN ORDER TO PREVENTPIPING OF WATER THROUGH STRUCTURE ROCKS, THE CONTRACTOR SHALL CHINK BY HAND OR EQUIPMENTALL UNDESIRABLE VOIDS WITH SMALLER ROCKS SUCH AS ANY EXISTING STREAMBED MATERIAL OR SPECIFIEDSUBSTRATE.8.FILTER FABRIC SHALL BE MIRAFI 180N OR ENGINEER APPROVED EQUAL (NON-WOVEN FABRIC) AND IS TO BEINSTALLED BETWEEN THE RIPRAP AND SOIL FOUNDATION (SEE DETAIL ON EXHIBIT 3).CONSTRUCTION GUIDELINES:1.ALL EROSION AND SEDIMENT CONTROL DEVICES SHOULD BE INSTALLED IN ACCORDANCE WITH THE APPROVEDEROSION CONTROL PLAN.2.CHANNEL FLOW SHOULD BE DIVERTED AWAY FROM THE WORK AREA IN ACCORDANCE WITH THE APPROVEDEROSION CONTROL PLAN AND SITE SHOULD BE DEWATERED.3.LOOSE MATERIAL AT THE TOE OF THE EMBANKMENT SHOULD BE EXCAVATED UNTIL A STABLE FOUNDATION ISREACHED.4.EXCAVATE THE STREAM BANK UNTIL A STABLE SLOPE ANGLE IS ACHIEVED. THE SUBGRADE SHOULD BESMOOTH, FIRM, AND FREE FROM PROTRUDING OBJECTS OR VOIDS THAT WOULD EFFECT THE PROPERPOSITIONING OF THE FIRST LAYER OF STONES AND FILTER FABRIC. REMOVE ROOTS, TWIGS, AND OTHER DEBRISIN BOULDER TOE EXCAVATION LIMITS.5.PLACE NON WOVEN GEOTEXTILE FILTER FABRIC LOOSELY AND EVENLY ON PREPARED FILL SLOPE AND SECUREWITH STAPLES 2 FEET ON-CENTER MAXIMUM. RETAIN A SUITABLE LENGTH OF NON WOVEN GEOTEXTILEFABRIC TO CONTINUE 12" PAST THE FOOTER ROCK. ADJACENT STRIPS SHOULD OVERLAP 12 INCHES AND BESTAPLED ON 12 INCH CENTERS. UPSTREAM OR UPSLOPE FILTER FABRIC SHOULD ALWAYS BE PLACED OVER THEDOWNSTREAM OR DOWNSLOPE FILTER FABRIC. IF THE FILTER FABRIC IS TORN OR DAMAGED DURINGCONSTRUCTION, IT SHOULD BE REPAIRED OR REPLACED. STAPLES SHALL BE 0.125 INCHES DIAMETER NEWSTEEL WIRE FORMED INTO A "U" SHAPE NOT LESS THAN 6 INCHES IN LENGTH WITH A THROAT OF 1 INCHWIDTH.6.FOOTER ROCKS SHALL BE PLACED INDIVIDUALLY AND KEYED INTO THE CHANNEL, BED, STREAM BANK ASSHOWN IN THE DETAIL. THE TOP ROCKS OF THESE STRUCTURES SHALL BE PLACED LINEARLY, WITH TIGHT ANDCONTIGUOUS SURFACE CONTACT WITH ADJACENT ROCK. ENSURE THE ROCKS ARE STACKED SO THE PLACEDSTONE RESTS ON TWO STONES IN THE TIER BELOW IT. HEADER BOULDERS SHOULD BE SET SLIGHTLY BACKFROM FOOTER BOULDERS SUCH THAT PART OF THE HEADER BOULDER IS RESTING ON THE POROUS BACKFILL.7.PLACEMENT OF COARSE BACKFILL SHOULD OCCUR CONCURRENTLY WITH THE PLACEMENT OF EACHCONSECUTIVE ROCK LAYER. THE BACKFILL SLOPE ANGLE SHOULD BE 2H:1V OR FLATTER BUT SHOULD ALWAYSPROVIDE AT MINIMUM POSITIVE DRAINAGE.8.IF GEOTEXTILE IS PUNCTURED DURING BOULDER PLACEMENT, THE BOULDERS SHALL BE FULLY REMOVED FORAT LEAST THREE FEET OUTSIDE THE LIMITS OF THE FABRIC PUNCTURE AND A NEW GEOTEXTILE PATCH WITHMINIMUM OVERLAP SHALL BE SECURELY FASTENED OVER THE PUNCTURE WITH SECURING PINS.
\\johnrmcadams.com\dfsrt1\Projects\SDP\SDP-17000\Storm\Aerial Sewer Stabilization\Current Drawings\SDP17000-STR.dwg, 10/23/2020 11:42:12 AM, Stubbs, Rebecca
OAK POINTE
BULLETIN DRAWINGS
EXHIBIT 3
APEX, NORTH CAROLINA
PROJECT NO.SDP-17000
FILENAME SDP17000-STR
CHECKED BY RAS
DRAWN BY KEG
SCALE
DATE
The John R. McAdams Company, Inc.
2905 Meridian Parkway
Durham, NC 27713
phone [phone]
fax [phone]
license number: C-0293, C-187
www.mcadamsco.com
PLAN INFORMATIONNON-WOVEN GEOTEXTILE FABRICMATERIAL SPECIFICATIONSN.T.S.
10.23.2020
\\johnrmcadams.com\dfsrt1\Projects\SDP\SDP-17000\Storm\Aerial Sewer Stabilization\Current Drawings\SDP17000-STR.dwg, 10/23/2020 11:42:13 AM, Stubbs, Rebecca
OAK POINTE
BULLETIN DRAWINGS
EXHIBIT 4
APEX, NORTH CAROLINA
PROJECT NO.SDP-17000
FILENAME SDP17000-STR
CHECKED BY RAS
DRAWN BY KEG
SCALE
DATE
The John R. McAdams Company, Inc.
2905 Meridian Parkway
Durham, NC 27713
phone [phone]
fax [phone]
license number: C-0293, C-187
www.mcadamsco.com
PLAN INFORMATIONSOIL LIFTS DETAILN.T.S.GENERAL NOTES:1.DO NOT EXCEED A 2H:1V SLOPE FOR SOIL LIFTS2.MAXIMUM LIFT THICKNESS 12", MINIMUM, 6".3.KEY-IN AND OVERLAP LIFTS A MINIMUM OF 1'.4.EACH SOIL LIFT WILL BE SECURELY STAKED AND KEYED INTO THE EXISTING BANK.5.WOODEN STAKES SHALL BE DESIGNED TO SAFELY AND EFFECTIVELY SECURE EROSION CONTROL BLANKETS, COIR LOGS, FASCINES, AND OTHER BIOENGINEEREDSTRUCTURES FOR TEMPORARY OR PERMANENT APPLICATIONS.6.SOIL LIFT FILL MATERIAL SHALL BE TOPSOIL OR 50 PERCENT MIX OF TOPSOIL AND SUITABLE SOIL MATERIAL AS DETERMINED BY THE DESIGN ENGINEER. ALL FILLMATERIAL SHALL BE FREE OF ROOTS, STICKS, ROCKS, BRUSH, LITTER AND OTHER OBJECTIONABLE MATERIAL.7.LIVE CUTTINGS SHALL MEET ALL OF THE SPECIFICATIONS STATED IN THE LIVE CUTTING NOTES ON THIS SHEET. THE LIVE BRANCHES SHOULD BE RELATIVELYSTRAIGHT, WITH NO VISIBLE SIGNS OF DISEASE, DAMAGE OR DEFORMITY.CONSTRUCTION GUIDELINES:1.INSTALL SUBGRADE GRADING AND BOULDER TOE TO FINISHED ELEVATIONS, REMOVING ROOTS, TWIGS, AND OTHER DEBRIS WHICHWOULD PREVENT THE MATTING FROM BEING LAID FLUSH TO THE FINISHED SURFACE.2.PLACE EROSION CONTROL BLANKET ON TOP OF THE SUBGRADE/BOULDER TOE PERPENDICULAR TO THE DIRECTION OF STREAMFLOW. RETAIN A SUITABLE LENGTH OF EROSION CONTROL BLANKET TO CONTINUE MATTING UP THE SLOPE. INSTALL THE EROSIONCONTROL BLANKET SUCH THAT THE UPSTREAM SIDE WILL BE ON TOP AND WILL OVERLAP THE DOWNSTREAM SIDE BY AT LEAST ONEFOOT AS NECESSARY TO COVER THE LONGITUDINAL LENGTH REQUIRED.3.PLACE SALVAGED AND/OR FURNISHED TOPSOIL UPON EROSION CONTROL BLANKET TO APPROPRIATE GRADE ELEVATION AND BANKSLOPE. PLACE SELECT FILL TO A VERTICAL DEPTH OF 6 INCHES (RIGHT BANK) AND 12 INCHES (LEFT BANK) AND MINIMUM OF 4 FEET INLENGTH. TAMP SOIL FIRMLY.4.APPLY PERMANENT SEED TO TOPSOIL IN ACCORDANCE WITH PLANTING SCHEDULES, SEED MIXES, AND PLANTING AS DESIGNED ANDAS SPECIFIED. SEED MIXTURE TO BE APPLIED TO FRONT PORTION OF LIFT THAT WILL BE LEFT EXPOSED.5.ENCAPSULATE THE TOPSOIL WITH UNBURIED LENGTH OF EROSION CONTROL BLANKET TO COVER THE LIFT. FASTEN EROSIONCONTROL BLANKET WITH WOODEN STAKES. HANDLE THE FABRIC AND SOIL MATERIALS IN A MANNER THAT DOES NOT DAMAGE THEMATTING OR DEPOSIT SOIL MATERIAL IN THE STREAM CHANNEL. REPAIRS AND FABRIC REPLACEMENT ARE THE RESPONSIBILITY OFTHE CONTRACTOR.6.AFTER SOIL LIFT IS COMPLETED, THE LIVE CUTTINGS SHALL BE CRISS-CROSSED ON TOP OF THE LIFT AT 8 TO 12 BRANCHES PER LINEARFOOT ALONG THE STREAM BANK. THE BASAL END OF THE BRANCHES SHOULD EXTEND AT LEAST 1 FOOT PAST THE BACK OF THE SOILLIFT, AGAINST THE BACK OF THE EXCAVATION. NO MORE THAN 6 INCHES OF THE BUDDING END OF THE LIVE BRANCH SHOULDEXTEND PAST THE FRONT OR FINISHED FACE OF THE SOIL LIFT. ORIENT THE BRANCHES SO THE EXPOSED PORTIONS HAVE THEIR BUDSFACING UPWARDS AND REMOVE THE TERMINAL BUD TO PROMOTE ROOT AND STEM DEVELOPMENT.7.COVER THE LIVE BRANCHES WITH TOPSOIL TO CREATE AN EVEN SURFACE FOR THE CONSTRUCTION OF THE NEXT LIFT.8.REPEAT TO FORM UNTIL A MINIMUM 2 SOIL LIFTS HAVE BEEN CREATED AT A SLOPE NO STEEPER THAN 2H:1V.9.APPLY PERMANENT SEEDING ON THE FINISHED SLOPE ACCORDING TO PLANTING PLAN (SEE EXHIBIT 6).SECTION VIEWN.T.S.
10.23.2020LIVE CUTTING NOTES:1.AREAS NOTED AS LIVE CUTTINGS WITHIN THE SOIL LIFTS SHALL BE PLANTED WITH SILKY DOGWOOD (CORNUS AMOMUM), SILKY WILLOW(SALIX SERICEA), AND BLACK WILLOW (SALIX NIGRA).2.ALL LIVE CUTTINGS SHALL BE DORMANT AT TIME OF ACQUISITION AND PLANTING.3.LIVE CUTTINGS SHALL BE 1/2-2” IN DIAMETER. LIVE CUTTINGS SHALL ALSO BE 2 - 4 FEET IN LENGTH.4.DURING PREPARATION, THE BASAL ENDS OF THE LIVE STAKES SHALL BE CLEANLY CUT AT AN ANGLE TO FACILITATE EASY INSERTION INTOTHE SOIL, WHILE THE TOPS SHALL BE CUT SQUARE OR BLUNT FOR TAMPING. ALL LIMBS SHALL REMAIN ON THE SIDES OF THE LIVECUTTING PRIOR TO INSTALLATION.5.CUTTINGS SHALL BE HARVESTED IN A MANNER SUCH THAT THEY ARE CUT, IMMEDIATELY PUT INTO WATER TO BE SOAKED FOR 10 DAYS,AND THEN PLANTED IMMEDIATELY AFTER THE 10 DAYS ARE COMPLETED. CUTTINGS SHALL REMAIN WET UNTIL THEY ARE PLANTED.OUTSIDE STORAGE LOCATIONS SHOULD BE CONTINUALLY SHADED AND PROTECTED FROM WIND AND DIRECT SUNLIGHT.6.LIVE CUTTINGS SHALL BE BUNDLED AND PLACED IN BETWEEN EACH SOIL LIFT AND STAKED. THE BRANCHES SHALL BE CRISS-CROSSED ONTOP OF THE LIFT AT 8 TO 12 BRANCHES PER LINEAR FOOT. THE BASAL END OF THE BRANCHES SHALL EXTEND AT LEAST 1 FOOT PAST THEBACK OF THE SOIL LIFT. NO MORE THAN 6 INCHES OF THE BUDDING END OF THE LIVE BRANCH SHALL EXTEND PAST THE FRONT ORFINISHED FACE OF THE SOIL LIFT. ANY STAKES THAT ARE SPLIT OR DAMAGED DURING INSTALLATION SHALL BE REMOVED AND REPLACED.7.ONE TO TWO INCHES SHALL BE CUT CLEANLY OFF OF THE TOP OF EACH LIVE STAKE (WITH LOPPERS) AT AN ANGLE OF APPROXIMATELY 15DEGREES FOLLOWING INSTALLATION.
\\johnrmcadams.com\dfsrt1\Projects\SDP\SDP-17000\Storm\Aerial Sewer Stabilization\Current Drawings\SDP17000-STR.dwg, 10/23/2020 11:42:14 AM, Stubbs, Rebecca
OAK POINTE
BULLETIN DRAWINGS
EXHIBIT 5
APEX, NORTH CAROLINA
PROJECT NO.SDP-17000
FILENAME SDP17000-STR
CHECKED BY RAS
DRAWN BY KEG
SCALE
DATE
The John R. McAdams Company, Inc.
2905 Meridian Parkway
Durham, NC 27713
phone [phone]
fax [phone]
license number: C-0293, C-187
www.mcadamsco.com
PLAN INFORMATIONCROSS-SECTION VIEWN.T.S.EROSION CONTROL BLANKET DETAILSNOTES:1.AN EROSION CONTROL BLANKET SHALL BE USED TO STABILIZE THE NEWLY CONSTRUCTEDCHANNEL FROM THE TOP OF BANK TO TOE OF SLOPE AND SHALL BE 100%BIODEGRADABLE.2.THE CHANNEL SIDE SLOPES SHALL BE FINE GRADED, SEEDED, FERTILIZED, AND LIMEDPRIOR TO INSTALLING THE EROSION CONTROL BLANKET. REMOVE ROOTS, TWIGS, ANDOTHER DEBRIS WHICH WOULD CAUSE BULGES IN THE MATTING AS WELL AS PREVENT THEMATTING FROM BEING LAID FLUSH TO THE FINISHED SURFACE.3.KEY-IN EDGES OF MATTING A MINIMUM OF 6 INCHES INTO FINISHED GRADE. LAYMATTING SHINGLED DOWNSTREAM TO UPSTREAM, OVERLAPPING AT EDGES A MINIMUMOF 1 FOOT.4.INSTALL STAKES TO ENSURE GOOD GROUND CONTACT OF THE MATTING TO WITHSTANDMEDIUM TO HIGH FLOWS. STAKES SHALL BE 100% BIODEGRADABLE AND INSTALLED PERTHE MANUFACTURER'S SPECIFICATIONS INCLUDING, BUT NOT LIMITED TO, THEMANUFACTURER'S RECOMMENDED DENSITY AND PATTERN.5.KEY-IN EDGES OF MATTING A MINIMUM OF 6 INCHES, PARTICULARLY NEAR RESTORATIONSTRUCTURES, BOULDERS, LOGS, ETC. CHECK MATTING FOR LOOSE ENDS, FLAPS, OR OTHERWEAKNESSES OR DAMAGE WHICH MAY CAUSE IT TO BECOME LOOSE UNDER FLOWCONDITIONS.6.THE EROSION CONTROL BLANKET SHALL CONSIST OF A MACHINE-PRODUCED BLANKETMADE OF COCONUT FIBER AND BE EQUIVALENT OR BETTER THAN THE FOLLOWINGSPECIFICATION. SOIL STABILIZATION MATTING WHICH USES PLASTICS, METALS, OR OTHERMAN-MADE MATERIALS IN THE CONSTRUCTION OF THE MATERIAL WILL NOT BEPERMITTED.WEIGHT = 13.6 OZ/SYTENSILE STRENGTH DRY (ASTM D 4595) = 780 LBS/FT MACHINE DIRECTION 744 LBS/FT CROSS DIRECTIONTENSILE STRENGTH WET (ASTM D 4595) = 672 LBS/FT MACHINE DIRECTION 648 LBS/FT CROSS DIRECTIONELONGATION FAILURE WET (ASTM D 4595) = 30% MACHINE DIRECTION28% CROSS DIRECTIONOPEN AREA = 65%RECOMMENDED SHEAR STRESS = 3LBS/SQ.FT.RECOMMENDED FLOW = 8FT/SRECOMMENDED SLOPE </= 1:1MINIMUM TWINE COUNT PER FOOT = 15X14SLOPE APPLICATION ISOMETRIC VIEWN.T.S.
10.23.2020
\\johnrmcadams.com\dfsrt1\Projects\SDP\SDP-17000\Storm\Aerial Sewer Stabilization\Current Drawings\SDP17000-STR.dwg, 10/23/2020 11:42:14 AM, Stubbs, Rebecca
OAK POINTE
BULLETIN DRAWINGS
EXHIBIT 6
APEX, NORTH CAROLINA
PROJECT NO.SDP-17000
FILENAME SDP17000-STR
CHECKED BY RAS
DRAWN BY KEG
SCALE
DATE
The John R. McAdams Company, Inc.
2905 Meridian Parkway
Durham, NC 27713
phone [phone]
fax [phone]
license number: C-0293, C-187
www.mcadamsco.com
PLAN INFORMATIONTEMPORARY SEEDING SCHEDULE:TEMPORARY SEEDING SHALL BE APPLIED AS NEEDED DURING CONSTRUCTION TO STABILIZE BARE OR DISTURBED AREAS OF SOIL AND AT THE COMPLETIONOR ALL GRADING AND EARTHWORK ACTIVITIES WITHIN A PARTICULAR AREA OF THE SITE. PERMANENT SEED MAY BE DISTRIBUTED WITH TEMPORARY SEEDUPON THE FINAL APPLICATION OF TEMPORARY SEED.SEEDING DATE SEEDING MIXTUREAPPLICATION RATEAUG 15 - MAY 1 RYE (GRAIN) 30 LBS/AC AUG 15 - MAY 1WHEAT30 LBS/ACMAY 1 - AUG 15GERMAN MILLET 10 LBS/ACMAY 1 - AUG 15BROWNTOP MILLET10 LBS/ACSEEDING METHODS1.EVENLY APPLY SEED USING A CYCLONE SEEDER, DRILL, CULTIPACKER SEEDER, OR HYDROSEEDER. THIS MUST BE DONE WITHIN 48 HOURS OF LANDDISTURBING ACTIVITIES.2.MULCH WITH CLEAN WHEAT STRAW.3.AFTER SEEDING, APPLY MULCH TO AREAS UNDER HARSH CONDITIONS SUCH AS AREAS THAT HAVE BEEN GRADED, OR THOSE WHICH WILL RECEIVECONCENTRATED FLOWS. AREAS CONSIDERED TO BE UNDER HARSH CONDITIONS WILL BE CONSIDERED THE AREAS GRADED FOR THE WETLAND VALLEY.4.RESEED AND MULCH AREAS WHERE SEEDLING EMERGENCE IS LESS THAN 80% COVERAGE, OR WHERE EROSION OCCURS, AS SOON AS POSSIBLE. DONOT MOW. PROTECT FROM TRAFFIC AS MUCH AS POSSIBLE.NOTES1.TEMPORARY ANNUAL SEED SELECTION SHOULD BE BASED ON SEASON OF PROJECT INSTALLATION.2.A SINGLE SPECIES FOR TEMPORARY COVER IS ACCEPTABLE3.IN SOME CASES WHERE SEASONS OVERLAP, A MIXTURE OF TWO OR MORE SPECIES MAY BE NECESSARY. HOWEVER, APPLICATION RATES SHOULD NOTEXCEED THE TOTAL RECOMMENDED RATE PER ACRE.4.TEMPORARY SEED SHOULD BE MIXED AND APPLIED SIMULTANEOUSLY WITH THE PERMANENT SEED MIX IF OPTIMAL PLANTING DATES ALLOW.PERMANENT SEEDING SCHEDULE:PLANT MATERIAL SELECTION1.REFER TO TABLE 6.24C ON THIS SHEET FOR APPROPRIATE SELECTIONS OF NATIVE PERMANENT SEEDS.2.PERMANENT SEED INCLUSION IN THE MIXTURE SHOULD TOTAL 15 LBS OF PURE LIVE SEED (PLS) PER ACRE DRILLED OR 15-20 LBS pls/AC BROADCASTAPPLIED.3.AT LEAST 4 SPECIES SHOULD BE SELECTED FOR THE MIXTURE INCLUDING ONE SPECIES FROM EACH TYPE (WARM SEASON, COLD SEASON, WETLAND).SELECTION OF MORE THAN 4 SPECIES IS RECOMMENDED FOR INCREASING CHANCES OF SUCCESSFUL VEGETATION ESTABLISHMENT.4.IF OTHER SPECIES SUCH AS WILDFLOWERS ARE ADDED TO THE MIX, THEY SHOULD NOT BE COUNTED IN THE MINIMUM SEEDING RATE FOR GRASSES.SEEDBED PREPARATION1.DISTURBED SOILS WITHIN RIPARIAN AREAS MUST BE AMENDED TO PROVIDE AN OPTIMUM ENVIRONMENT FOR SEED GERMINATION AND SEEDLINGGROWTH.2.THE pH OF THE SOIL MUST BE SUCH THAT IT IS NOT TOXIC AND NUTRIENTS ARE AVAILABLE.3.SOIL ANALYSIS SHOULD BE PERFORMED TO DETERMINE NUTRIENT AND LIME NEEDS OF EACH SITE.4.APPROPRIATE pH LEVELS ARE BETWEEN 5.5 - 7.5.RIPARIAN BUFFERS REGULATED FOR NUTRIENT MANAGEMENT MAY BE LIMITED TO A SINGLE APPLICATION OF FERTILIZER.6.SUITABLE MECHANICAL MEANS SUCH AS DISKING, RAKING, OR HARROWING MUST BE EMPLOYED TO LOOSEN COMPACTED SOIL PRIOR TO SEEDING.PLANTING1.APPLY SEED UNIFORMLY WITH A CYCLONE SEEDER, DROP-TYPE SPREADER, DRILL, OR HYDROSEEDER ON A FIRM, FRIABLE SEEDBED.2.IN FINE SOILS, SEEDS SHOULD BE DRILLED 0.25 - 0.5 INCHES. IN COARSE SANDY SOILS, SEEDS SHOULD BE PLANTED NO DEEPER THAN 0.75 INCHES.MULCH1.MULCH ALL PLANTINGS IMMEDIATELY AFTER SEEDING.2.IF PLANTING ON STREAM BANKS STEEPER THAN 10% OR AREAS SUBJECT TO FLOODING, A BIODEGRADABLE ROLLED EROSION CONTROL PRODUCT ISRECOMMENDED TO HOLD SEED AND SOIL IN PLACE.MAINTENANCE1.THE RECOMMENDED PERMANENT GRASS SPECIES MAY REQUIRE TWO YEARS FOR ESTABLISHMENT, DEPENDING ON SITE CONDITIONS.2.INSPECT SEEDED AREAS FOR FAILURE AND MAKE NECESSARY REPAIRS, SOIL AMENDMENTS, AND RE-SEEDINGS.3.IF WEEDY EXOTIC SPECIES HAVE TAKEN OVER THE AREAS AFTER THE FIRST GROWING SEASON, THE INVASIVE SPECIES MUST BE ERADICATED TO ALLOWNATIVE SPECIES TO GROW.4.MONITOR THE SITE UNTIL LONG-TERM STABILITY HAS BEEN ESTABLISHED.N.T.S.
10.23.2020

December 3, 2020

Regulatory Division

Action ID. SAW-2016-00095

Landon Walls
Lennar Carolinas, LLC
1100 Perimeter Park Drive, suite 112
Morrisville, North Carolina 27560

Dear Mr. Walls:

Reference the Department of the Army (DA) permit issued on November 4, 2016, for the
permanent discharge of fill material into 0.95 acre of wetlands and 355 linear feet of stream
channel and temporary placement of fill material into 20 linear feet of stream channel for the
construction of the Oak Pointe residential subdivision in the town of apex, Wake County, North
Carolina. This modification requests additional permanent stream channel impact of 95 linear
feet at Impact area E for the installation of stream bank armoring/rip rap for the protection of a
sewer line crossing.

I have determined that the proposed project modifications described above are not
contrary to the public interest and are consistent with the 404 (B) (1) Guidelines and therefore,
the DA permit is hereby modified. The authorized work shall be completed in accordance with
the attached revised drawings. All other conditions of the original permit remain applicable and
the expiration date is unchanged. The permit modification is as follows:

Special Condition(s):

a) CONSTRUCTION PLANS: All work authorized by this permit must be
performed in strict compliance with the attached plans dated August 8, 2016 and
November 2, 2020. Any modification to these plans must be approved by the US
Army Corps of Engineers (USACE) prior to implementation

REPLY TO
ATTENTION OF:
DEPARTMENT OF THE ARMY
WILMINGTON DISTRICT, CORPS OF ENGINEERS
P.O. BOX 1890
WILMINGTON, NORTH CAROLINA 28402-1890
This approved modification should be attached to the original permit and will be utilized
for future compliance reviews of the project. If you have questions, please contact James
Lastinger of the Raleigh Regulatory Field Office, at telephone [phone] ext 32.

Sincerely,

Benjamin A. Bennett
Colonel U.S. Army
District Commander

Enclosures:

Copies Furnished (electronic):

McAdams Company
Attn: Jennifer Burdette
2905 Meridian Parkway
Durham, NC 27713

NC Division of Water Resources
401 & Buffer Permitting Branch
Attn: Paul Wojoski
512 N. Salisbury Street
Archdale Bldg. 9th Floor
Raleigh, NC 27604

SOIL LIFTS -
RIGHT BANK
\/-:7 // / / f J y (SEE DETAIL I /j
ON EXHIBIT 3)
// BODER TOE REVETMENT
3 I / �)(f \9 \ (SULEE DETAIL ON EXHIBIT 2)
r
— /I ) TOP OF MANHOLE \( § i�/ \ )\ l / EXISTING
TOE
/ ELEV.: 329.42' AERIAL
i EXISTING NK
r SEWER PIER I ,� EXISTING TOP
20' JORDAN �,L ./.� �%r �/ OF BANK
/ LAKE ZONE 2 T/I�\I / TOP OF PIPE �. _ y`Lj > ,j2�O l�
V/ BUFFER (TYP.) / / 20, / ELEV.: 327.83'/ 0 �t/� V'.
BOTTOM OF PIPE30' JORDAN - ✓ \ 1 )
ELEV.: 325, 90'
/ LAKE ZONE 1 J // X " JQ, EXISTING TOP
BUFFER (TYP.) // / �� \\/� x OF BANK
841 SF IMPACT
P- �/ EXISTING TO
IOF BANK
/
1/
/
/ /� / ) EXISTING TOP
// PROPERTY / OF BANK 9
'ASBUILT FEMA FLOODPLAIN /// �// Ir / I ` �
/(PENDING APPROVAL) ASBUILT FEMA FLOODWAY EXISTING
(PENDING APPROVAL) STREAM
CENTERLINE
GENERAL NOTES:
1. ALL DIMENSIONS AND GRADES SHOWN ON THE PLANS SHALL BE FIELD VERIFIED BY THE
CONTRACTOR PRIOR TO CONSTRUCTION. CONTRACTOR SHALL NOTIFY THE OWNER AND
DESIGN ENGINEER IF ANY DISCREPANCIES EXIST PRIOR TO PROCEEDING WITH
CONSTRUCTION FOR NECESSARY PLAN OR GRADE CHANGES. NO EXTRA COMPENSATION
SHALL BE PAID TO THE CONTRACTOR FOR ANY WORK DONE DUE TO DIMENSIONS OR
GRADES SHOWN INCORRECTLY ON THESE PLANS IF SUCH NOTIFICATION HAS NOT BEEN
GIVEN.
2. THE EXISTING GRADE SHOWN IN THIS DRAWING IS BASED ON SURVEY BY THE JOHN R.
MCADAMS CO. CONDUCTED FEBRUARY 2020. CONTRACTOR TO RESTORE THE TOE OF THE
CHANNEL BANK TO APPROXIMATE LOCATION SHOWN ON THESE PLANS. CONTRACTOR
SHALLTIE PROPOSED TOP OF BANK BASED ON SITE CONDITIONS ATTIME OF
CONSTRUCTION.
SITE LEGEND
ASBUILT FEMA FLOODWAY
/ (PENDING APPROVAL) i
\ 30' JORDAN
✓ LAKE ZONE 1
BUFFER (TYP.) / \
841 SF IMPACT
NCDOT CLASS I RIPRAP
CHINKED WITH CLASS B RIPRAP.
\ X, RIPRAP TO BE FLUSH WITH
PROPOSED CHANNEL BANK FACE.
TO BE LINED WITH GEOTEXTILE
FABRIC OR ENGINEER -APPROVED /
EQUIVALENT. L
\ 20' JORDAN
LAKE ZONE 2
/ \ BUFFER (TYP.)
SOIL LIFTS -
(EFT BANK ASBUILT
LOODPLMA
SEE DETAIL
1 ON EXHIBIT 3) (PENDING APPROVAL)
\ EXISTING AERIAL
SEWER PIER
TOP OF PIPE ` J
/ ELEV.: 328.82'
/ BOTTOM OF PIPE
'( ELEV.: 326.82'
�S BOULDER TOE REVETMENT _f
PERMANENT (SEE DETAIL ON EXHIBIT 2) `- y
STREAM IMPACT / sF
95 LF (0.02 AC) / / 'k
LD LD LIMITS OF DISTURBANCE
WOODED AREA
zjU
MAJOR CONTOUR
252
MINOR CONTOUR
_______ 250_______
EXISTING MAJOR CONTOUR
------- 252 ------
EXISTING MINOR CONTOUR
EXISTING STREAM CENTERLINE
CLASS I RIPRAP
BOULDER TOE REVETMENT
6;" SOIL LIFTS
EROSION CONTROL BLANKET
KK�x AND PERMANENT SEEDING
GRAPHIC SCALE
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1 inch = 20 ft.
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GENERAL NOTES:
1. FOOTER BOULDERS SHOULD BE FLATAND RECEANGULARAND PROVIDE AN EVEN SURFACE FOR STACKING.
2. BOULDERS SHALL BE ANGULAR, FLAT, OR CUBED ROCK. INDIVIDUAL ROCK FRAGMENTS SHALL BE DENSE,
SOUND, AND FREE FROM CRACKS, SEAMS OR OTHER DEFECTS CONDUCIVE TO ACCELERATED WEATHERING.
NO CONCRETE, MAN-MADE ROCKS, OR SOFT ROCKS SHALL BE USED FOR THE CONSTRUCTION OF THE BOULDER
TOE REVETMENT.
3. FOOTINGS SHOULD BE LEVEL. THE LONGEST AXIS OF THE BOULDER SHOULD BE ORIENTED AT A NEAR VERTICAL
ANGLE.
4. BOULDERS SHALL BE PLACED BY MECHANICAL OR OTHER ACCEPTABLE METHODS, MINIMIZING VOIDS. THE
BOULDERS SHALL BE PLACED TO FORM A NEAT AND UNIFORM SURFACE AREA. NO MORTAR IS PERMITTED.
6. COMPACTED FILL MATERIAL SHALL BE CONSIDERED SUITABLE SOIL MATERIAL, FREE OF ROOTS, STICKS, ROCKS,
BRUSH, LITTER AND OTHER OBJECTIONABLE MATERIAL.
7. NO SIGNIFICANT VOIDS SHOULD EXIST BETWEEN ADJOINING FOOTER AND TOP ROCK. IN ORDER TO PREVENT
PIPING OF WATER THROUGH STRUCTURE ROCKS, THE CONTRACTOR SHALL CHINK BY HAND OR EQUIPMENT
ALL UNDESIRABLE VOIDS WITH SMALLER ROCKS SUCH AS ANY EXISTING STREAMBED MATERIAL OR SPECIFIED
SUBSTRATE.
8. FILTER FABRIC SHALL BE MIRAFI 18ON OR ENGINEER APPROVED EQUAL (NON -WOVEN FABRIC) AND IS TO BE
INSTALLED BETWEEN THE RIPRAP AND SOIL FOUNDATION (SEE DETAIL ON EXHIBIT 3).
CONSTRUCTION GUIDELINES:
1. ALL EROSION AND SEDIMENT CONTROL DEVICES SHOULD BE INSTALLED IN ACCORDANCE WITH THE APPROVED
EROSION CONTROL PLAN.
2. CHANNEL FLOW SHOULD BE DIVERTED AWAY FROM THE WORK AREA IN ACCORDANCE WITH THE APPROVED
EROSION CONTROL PLAN AND SITE SHOULD BE DEWATERED.
3. LOOSE MATERIAL AT THE TOE OF THE EMBANKMENT SHOULD BE EXCAVATED UNTIL A STABLE FOUNDATION IS
REACHED.
4. EXCAVATE THE STREAM BANK UNTIL A STABLE SLOPE ANGLE IS ACHIEVED. THE SUBGRADE SHOULD BE
SMOOTH, FIRM, AND FREE FROM PROTRUDING OBJECTS OR VOIDS THAT WOULD EFFECT THE PROPER
POSITIONING OF THE FIRST LAYER OF STONES AND FILTER FABRIC. REMOVE ROOTS, TWIGS, AND OTHER DEBRIS
IN BOULDER TOE EXCAVATION LIMITS.
S. PLACE NON WOVEN GEOTEXTILE FILTER FABRIC LOOSELY AND EVENLY ON PREPARED FILL SLOPE AND SECURE
WITH STAPLES 2 FEET ON -CENTER MAXIMUM. RETAIN A SUITABLE LENGTH OF NON WOVEN GEOTEXTILE
FABRIC TO CONTINUE 12" PAST THE FOOTER ROCK. ADJACENT STRIPS SHOULD OVERLAP 12 INCHES AND BE
STAPLED ON 12 INCH CENTERS. UPSTREAM OR UPSLOPE FILTER FABRIC SHOULD ALWAYS BE PLACED OVER THE
DOWNSTREAM OR DOWNSLOPE FILTER FABRIC. IF THE FILTER FABRIC IS TORN OR DAMAGED DURING
CONSTRUCTION, IT SHOULD BE REPAIRED OR REPLACED, STAPLES SHALL BE 0.125 INCHES DIAMETER NEW
STEEL WIRE FORMED INTO A "U" SHAPE NOT LESS THAN 6INCHES IN LENGTH WITH ATHROAT OF 1INCH
WIDTH.
6. FOOTER ROCKS SHALL BE PLACED INDIVIDUALLY AND KEYED INTO THE CHANNEL, BED, STREAM BANK AS
SHOWN IN THE DETAIL. THE TOP ROCKS OF THESE STRUCTURES SHALL BE PLACED LINEARLY, WITH TIGHT AND
CONTIGUOUS SURFACE CONTACT WITH ADJACENT ROCK. ENSURE THE ROCKS ARE STACKED SO THE PLACED
STONE RESTS ON TWO STONES IN THE TIER BELOW IT. HEADER BOULDERS SHOULD BE SET SLIGHTLY BACK
FROM FOOTER BOULDERS SUCH THAT PART OF THE HEADER BOULDER IS RESTING ON THE POROUS BACKFILL.
7. PLACEMENT OF COARSE BACKFILL SHOULD OCCUR CONCURRENTLY WITH THE PLACEMENT OF EACH
CONSECUTIVE ROCK LAYER. THE BACKFILL SLOPE ANGLE SHOULD BE 2H:1V OR FLATTER BUT SHOULD ALWAYS
PROVIDE AT MINIMUM POSITIVE DRAINAGE.
8. IF GEOTEXTILE IS PUNCTURED DURING BOULDER PLACEMENT, THE BOULDERS SHALL BE FULLY REMOVED FOR
AT LEAST THREE FEET OUTSIDE THE LIMITS OF THE FABRIC PUNCTURE AND A NEW GEOTEXTILE PATCH WITH
MINIMUM OVERLAP SHALL BE SECURELY FASTENED OVER THE PUNCTURE WITH SECURING PINS.
EROSION CONTROL BLANKET
(SEE DETAIL ON EXHIBIT 5)
SOIL LIFTS
(SEE DETAIL ON EXHIBIT 4)
MIN. 3.51 X 3.5'W X 2'H
BOULDERS
BASEFLOW 17
EXISTING GRADE
STREAM BED —III—
BOULDER TOE REVETMENT
6" MIN EXISTING GRADE
TOPSOIL (TYP.) (TYP.)
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INSITU SOILS
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-I I III —IS17 GENERAL NOTE 6)
— —WOVEN j EEO -TEXTILE
-IIIP-I
;6ARSE BACKFILL COMPOSED
TTI �(IF AASHTO NO. 57 STONE
— (MAX OF 5% FINES)
MIN
EXCAVATION LIMITS
11=1 I I I I (TYP )
EMBED FOOTER BOULDERS
(MINIMUM 1')
NON WOVEN GEOTEXTILE
FABRIC TO EXTEND MIN.
12" PAST FOOTER ROCK
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NOTE: GEOTEXTILE FABRIC (NON —WOVEN) SHALL CONFORM TO THE FOLLOWING SPECIFICATIONS.
MECHANICAL PROPERTIES
TEST
METHOD
UNIT
MINIMUM AVERAGE
VALUE
ROLL
MD
CD
GRAB TENSILE STRENGTH
ASTM
D 4632
N (Ibs)
912 (205)
912
(205)
GRAB TENSILE ELONGATION
ASTM
D 4632
%
50
50
TRAPEZOID TEAR STRENGTH
ASTM
D 4533
N (Ibs)
356 (80)
356 (80)
CBR PUNCTURE STRENGTH
ASTM
D 6241
N (Ibs)
2225 (500)
APPARENT OPENING SIZE (AOS)i
ASTM
D 4751
mm (U.S. SIEVE)
0.18 (80)
PERMITTIVITY
ASTM
D 4491
c -1
1A
FLOW RATE
ASTM
D 4491
I/min/m' (gal/min/ft')
3870 (95)
UV RESISTANCE (AT 500 HOURS)
ASTM
D 4355
% STRENGTH RETAINED
70
'ASTM D 4751: AOS IS A MAXIMUM OPENING DIAMETER VALUE
PHYSICAL PROPERTIES
TEST METHOD
UNIT
TYPICAL VALUE
WEIGHT
ASTM D 5261
g/m' (o /yd')
271 (8.0)
THICKNESS
ASTM D 5199
mm (mils)
1.8 (72)
ROLL DIMENSIONS (WIDTH X LENGTH)
—
ft
12.5 X 360 15 X 300
ROLL AREA
—
m' (yd')
418 (500)
ESTIMATED ROLL WEIGHT
—
kg (lb)
120 (265)
NON —WOVEN GEOTEXTILE FABRIC
MATERIAL SPECIFICATIONS
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GENERAL NOTES:
1. DO NOT EXCEED A 2H:1V SLOPE FOR SOIL LIFTS
2. MAXIMUM LIFTTHICKNESS 12", MINIMUM, 6".
3. KEY -IN AND OVERLAP LIFTS A MINIMUM OF 1'.
4. EACH SOIL LIFT WILL BE SECURELY STAKED AND KEYED INTO THE EXISTING BANK.
S. WOODEN STAKES SHALL BE DESIGNED TO SAFELY AND EFFECTIVELY SECURE EROSION CONTROL BLANKETS, COIR LOGS, FASCINES, AND OTHER BIOENGINEERED
STRUCTURES FOR TEMPORARY OR PERMANENT APPLICATIONS.
6. SOIL LIFT FILL MATERIAL SHALL BE TOPSOIL OR 50 PERCENT MIX OF TOPSOILAND SUITABLE SOIL MATERIAL AS DETERMINED BY THE DESIGN ENGINEER. ALL FILL
MATERIAL SHALL BE FREE OF ROOTS, STICKS, ROCKS, BRUSH, LITTER AND OTHER OBJECTIONABLE MATERIAL.
7. LIVE CUTTINGS SHALL MEET ALL OF THE SPECIFICATIONS STATED IN THE LIVE CUTTING NOTES ON THIS SHEET. THE LIVE BRANCHES SHOULD BE RELATIVELY
STRAIGHT, WITH NO VISIBLE SIGNS OF DISEASE, DAMAGE OR DEFORMITY.
1. AREASNOTED AS LIVE CUTTINGS WITHIN THE SOIL LIFTS SHALL BE PLANTED WITH SILKY DOGWOOD(CORNUSAMOMUM), SILKY WILLOW
(SALIX SERICEA), AND BLACK WILLOW (SALIX NIGRA).
2. ALL LIVE CUTTINGS SHALL BE DORMANT AT TIME OF ACQUISITION AND PLANTING.
3. LIVE CUTTINGS SHALL BE 1/2-2" IN DIAMETER. LIVE CUTTINGS SHALL ALSO BE 2-4 FEET INLENGTH.
4. DURING PREPARATION, THE BASAL ENDS OF THE LIVE STAKES SHALL BE CLEANLY CUT AT AN ANGLE TO FACILITATE EASY INSERTION INTO
THE SOIL, WHILE THE TOPS SHALL BE CUT SQUARE OR BLUNT FOR TAMPING. ALL LIMBS SHALL REMAIN ON THE SIDES OF THE LIVE
CUTTING PRIOR TO INSTALLATION.
S. CUTTINGS SHALL BE HARVESTED IN A MANNER SUCH THAT THEY ARE CUT, IMMEDIATELY PUT INTO WATER TO BE SOAKED FOR 10 DAYS,
AND THEN PLANTED IMMEDIATELY AFTER THE 30 DAYS ARE COMPLETED. CUTTINGS SHALL REMAIN WET UNTIL THEY ARE PLANTED,
OUTSIDE STORAGE LOCATIONS SHOULD BE CONTINUALLY SHADED AND PROTECTED FROM WIND AND DIRECT SUNLIGHT.
6. LIVE CUTTINGS SHALL BE BUNDLED AND PLACED IN BETWEEN EACH SOIL LIFT AND STAKED. THE BRANCHES SHALL BE CRISS-CROSSED ON
TOP OF THE LIFT AT 8 TO 12 BRANCHES PER LINEAR FOOT. THE BASAL END OF THE BRANCHES SHALL EXTEND AT LEAST 1 FOOT PAST THE
BACK OF THE SOIL LIFT. NO MORE THAN 6 INCHES OF THE BUDDING END OF THE LIVE BRANCH SHALL EXTEND PAST THE FRONT OR
FINISHED FACE OF THE SOIL LIFT. ANY STAKES THAT ARE SPLIT OR DAMAGED DURING INSTALLATION SHALL BE REMOVED AND REPLACED.
7. ONE TO TWO INCHES SHALL BE CUT CLEANLY OFF OF THE TOP OF EACH LIVE STAKE (WITH LOPPERS) AT AN ANGLE OF APPROXIMATELY 15
DEGREES FOLLOWING INSTALLATION.
1. INSTALLS BGRADE GRADING AND BOULDER TOE TO FINISHED ELEVATIONS, REMOVING ROOTS, TWIGS, AND OTHER DEBRIS WHICH
WOULD PREVENT THE MATTING FROM BEING LAID FLUSH TO THE FINISHED SURFACE.
2. PLACE EROSION CONTROL BLANKET ON TOP OF THE SUBGRADE/BOULDER TOE PERPENDICULAR TO THE DIRECTION OF STREAM
FLOW. RETAIN A SUITABLE LENGTH OF EROSION CONTROL BLANKET TO CONTINUE MATTING UP THE SLOPE. INSTALL THE EROSION
CONTROL BLANKET SUCH THAT THE UPSTREAM SIDE WILL BE ON TOP AND WILL OVERLAP THE DOWNSTREAM SIDE BY AT LEAST ONE
FOOT AS NECESSARY TO COVER THE LONGITUDINAL LENGTH REQUIRED.
3. PLACE SALVAGED AND/OR FURNISHED TOPSOIL UPON EROSION CONTROL BLANKET TO APPROPRIATE GRADE ELEVATION AND BANK
SLOPE. PLACE SELECT FILL TO A VERTICAL DEPTH OF 6 INCHES (RIGHT BANK) AND 12 INCHES (LEFT BANK) AND MINIMUM OF 4 FEET IN
LENGTH. TAMP SOIL FIRMLY.
4. APPLY PERMANENT SEED TO TOPSOIL IN ACCORDANCE WITH PLANTING SCHEDULES, SEED MIXES, AND PLANTING AS DESIGNED AND
AS SPECIFIED. SEED MIXTURE TO BE APPLIED TO FRONT PORTION OF LIFT THAT WILL BE LEFT EXPOSED.
5. ENCAPSULATE THE TOPSOIL WITH UNBURIED LENGTH OF EROSION CONTROL BLANKET TO COVER THE LIFT. FASTEN EROSION
CONTROL BLANKET WITH WOODEN STAKES. HANDLE THE FABRIC AND SOIL MATERIALS IN A MANNER THAT DOES NOT DAMAGE THE
MATTING OR DEPOSIT SOIL MATERIAL IN THE STREAM CHANNEL. REPAIRS AND FABRIC REPLACEMENT ARE THE RESPONSIBILITY OF
THE CONTRACTOR.
6. AFTER SOIL LIFT IS COMPLETED, THE LIVE CUTTINGS SHALL BE CRISS-CROSSED ON TOP OF THE LIFT AT 8 TO 12 BRANCHES PER LINEAR
FOOT ALONG THE STREAM BANK. THE BASAL END OF THE BRANCHES SHOULD EXTEND AT LEAST 1 FOOT PAST THE BACK OF THE SOIL
LIFT, AGAINST THE BACK OF THE EXCAVATION. NO MORE THAN 6INCHES OF THE BUDDING END OF THE LIVE BRANCH SHOULD
EXTEND PAST THE FRONT OR FINISHED FACE OF THE SOIL LIFT. ORIENT THE BRANCHES SO THE EXPOSED PORTIONS HAVE THEIR BUDS
FACING UPWARDS AND REMOVE THE TERMINAL BUD TO PROMOTE ROOT AND STEM DEVELOPMENT.
LIVE CUTTINGS
(SEE GENERAL
NOTE 7 AND LIVE
CUTTING NOTES)
SOIL LIFTS
MAX HEIGHT 12"
TOPSOIL OR 50% MIX
(SEE NOTES)
7. COVER THE LIVE BRANCHES WITH TOPSOIL TO CREATE AN EVEN SURFACE FOR THE CONSTRUCTION OF THE NEXT LIFT. SOIL
LIFTS
DETAIL
8. REPEAT TO FORM UNTIL A MINIMUM 2 SOIL LIFTS HAVE BEEN CREATED AT A SLOPE NO STEEPER THAN 2H:SV. J L FIJ CIF1 L
9. APPLY PERMANENT SEEDING ON THE FINISHED SLOPE ACCORDING TO PLANTING PLAN (SEE EXHIBIT 6).
N.T.S.
INSTALL EROSION CONTROL BLANKET IN —
6" TRENCH, ANCHOR WITH WOODEN STAKE
(PREFERRED) OR STAPLE, BACKFILL, AND
COMPACT. RESTORE DISTURBED AREA WITH
TOPSOIL, SEEDING, AND PLANTING
ESTABLISHED PERMANENT SEEDING
(SEE EXHIBIT 6)
EROSION CONTROL
BLANKET
(SEE EXHIBIT 5)
2 (MAX) + + + + + +
MATTING EMBEDMENT
i+ +
+ + + + + + +
+ + _+/+, + tq
SECTION VIEW
LEFT BANK:
2 SOIL LIFTS WITH
12" HEIGHT
RIGHT BANK:
2 SOIL LIFTS WITH
6" HEIGHT
EXISTING
GRADE (TYP.)
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NOTES:
1. AN EROSION CONTROL BLANKET SHALL BE USED TO STABILIZE THE NEWLY CONSTRUCTED
CHANNEL FROM THE TOP OF BANK TO TOE OF SLOPE AND SHALL BE 100%
BIODEGRADABLE.
2. THE CHANNEL SIDE SLOPES SHALL BE FINE GRADED, SEEDED, FERTILIZED, AND LIMED
PRIOR TO INSTALLING THE EROSION CONTROL BLANKET. REMOVE ROOTS, TWIGS, AND _
OTHER DEBRIS WHICH WOULD CAUSE BULGES IN THE MATTING AS WELL AS PREVENT THE III=
MATTING FROM BEING LAID FLUSH TO THE FINISHED SURFACE.
3. KEY -IN EDGES OF MATTING A MINIMUM OF 6INCHES INTO FINISHED GRADE. LAY BLANKET
MATTING SHINGLED DOWNSTREAM TO UPSTREAM, OVERLAPPING AT EDGES A MINIMUM KEYED 6" MIN
OF FOOT.
4. INSTALL STAKES TO ENSURE GOOD GROUND CONTACT OF THE MATTING TO WITHSTAND
MEDIUM TO HIGH FLOWS. STAKES SHALL BE 100% BIODEGRADABLE AND INSTALLED PER
THE MANUFACTURER'S SPECIFICATIONS INCLUDING, BUT NOT LIMITED TO, THE
MANUFACTURER'S RECOMMENDED DENSITY AND PATTERN.
5. KEY -IN EDGES OF MATTING A MINIMUM OF 6INCHES, PARTICULARLY NEAR RESTORATION
STRUCTURES, BOULDERS, LOGS, ETC. CHECK MATTING FOR LOOSE ENDS, FLAPS, OR OTHER
WEAKNESSES OR DAMAGE WHICH MAY CAUSE ITTO BECOME LOOSE UNDER FLOW
CONDITIONS.
6. THE EROSION CONTROL BLANKET SHALL CONSIST OF A MACHINE -PRODUCED BLANKET
MADE OF COCONUT FIBER AND BE EQUIVALENT OR BETTER THAN THE FOLLOWING
SPECIFICATION. SOIL STABILIZATION MATTING WHICH USES PLASTICS, METALS, OR OTHER
MAN-MADE MATERIALS IN THE CONSTRUCTION OF THE MATERIAL WILL NOT BE
PERMITTED.
WEIGHT = 13.6 OZ/SY
TENSILE STRENGTH DRY (ASTM D 4595) = 780 LBS/FT MACHINE DIRECTION
744 LBS/FT CROSS DIRECTION 6 INCH DEEP (MIN.)
KEY IN TRENCH
TENSILE STRENGTH WET (ASTM D 4595) = 672 LBS/FT MACHINE DIRECTION
648 LBS/FT CROSS DIRECTION
ELONGATION FAILURE WET (ASTM D4595)= 30% MACHINE DIRECTION
28% CROSS DIRECTION
OPEN AREA = 65%
RECOMMENDED SHEAR STRESS = 3LBS/SQ.FT.
RECOMMENDED FLOW = BETA
RECOMMENDED SLOPE </= 1:1
MINIMUM TWINE COUNT PER FOOT= 15X14
OVERLAP ROLL EDGES
1 FOOT MINIMUM (TYP.)
1' MIN
BANKFULL STAGE
I'
EROSION CONTROL BLANKET
BLANKET KEYED 6" MIN
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PREPARED SLOP
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WITH SEED IN PLACE
(TYP.)
EROSION CONTROL BLANKET DETAILS
N.T.S.
SLOPE APPLICATION ISOMETRIC VIEW
FILL MAT VOIDS
IF SPECIFIED
6 IN MIN. OVERLAP
AT ROLL END (TYP.)
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TEMPORARY SEEDING SCHEDULE:
TEMPORARY SEEDING SHALL BE APPLIED AS NEEDED DURING CONSTRUCTION TO STABILIZE BARE OR DISTURBED AREAS OF SOIL AND AT THE COMPLETION
OR ALL GRADING AND EARTHWORK ACTIVITIES WITHIN A PARTICULAR AREA OF THE SITE. PERMANENT SEED MAYBE DISTRIBUTED WITH TEMPORARY SEED
UPON THE FINAL APPLICATION OF TEMPORARY SEED.
SEEDING DATE SEEDING MIXTURE APPLICATION RATE
AUG 15 - MAY 1 RYE (GRAIN) 30 LBS/AC
AUG 15 - MAY 1 W H EAT 30 LBS/AC
MAY 1 -AUG 15 GERMAN MILLET 10 LBS/AC
MAY 1 -AUG 15 BROWNTOP MILLET 10 LBS/AC
SEEDING METHODS
1. EVENLYAPPLYSEED USING A CYCLONE SEEDER, DRILL, CULTI PACKER SEEDER, OR HYDROSEEDER. THIS MUST BE DONE WITHIN 48 HOURS OF LAND
DISTURBING ACTIVITIES.
2. MULCH WITH CLEAN WHEATSTRAW.
3. AFTERSEEDING, APPLY MULCH TOAREAS UNDER HARSH CONDITIONS SUCH AS AREASTHAT HAVE BEEN GRADED, OR THOSE WHICH WILL RECEIVE
CONCENTRATED FLOWS. AREAS CONSIDERED TO BE UNDER HARSH CONDITIONS WILL BE CONSIDERED THE AREAS GRADED FOR THE WETLAND VALLEY.
4. RESEED AND MULCH AREAS WHERE SEEDLING EMERGENCE IS LESSTHAN 80%COVERAGE, OR WHERE EROSION OCCURS, AS SOON AS POSSIBLE. DO
NOT MOW. PROTECT FROM TRAFFIC AS MUCH AS POSSIBLE.
NOTES
1. TEMPORARY ANNUAL SEED SELECTION SHOULD BE BASED ON SEASON OF PROJECT INSTALLATION.
2. ASINGLE SPECIES FOR TEMPORARYCOVER IS ACCEPTABLE
3. IN SOME CASES WHERE SEASONS OVERLAP, A MIXTURE OF TWO OR MORE SPECIES MAY BE NECESSARY. HOWEVER, APPLICATION RATES SHOULD NOT
EXCEED THE TOTAL RECOMMENDED RATE PER ACRE.
4. TEMPORARY SEED SHOULD BE MIXED AND APPLIED SIMULTANEOUSLY WITH THE PERMANENT SEED MIX IF OPTIMAL PLANTING DATES ALLOW.
PERMANENT SEEDING SCHEDULE:
PLANT MATERIAL SELECTION
1. REFER TO TABLE 6.24C ON THIS SHEET FOR APPROPRIATE SELECTIONS OF NATIVE PERMANENT SEEDS.
2. PERMANENT SEED INCLUSION IN THE MIXTURE SHOULD TOTAL 15 LBS OF PURE LIVE SEED (PLS) PER ACRE DRILLED OR 15-20 LBS pls/AC BROADCAST
APPLIED.
3. AT LEAST SPECIES SHOULD BE SELECTED FOR THE MIXTURE INCLUDING ONE SPECIES FROM EACH TYPE (WARM SEASON, COLD SEASON, WETLAND).
SELECTION OF MORE THAN 4 SPECIES IS RECOMMENDED FOR INCREASING CHANCES OF SUCCESSFUL VEGETATION ESTABLISHMENT.
4. IF OTHER SPECIES SUCH AS WILDFLOWERS ARE ADDED TO THE MIX, THEY SHOULD NOT BE COUNTED IN THE MINIMUM SEEDING RATE FOR GRASSES.
SEEDBED PREPARATION
1. DISTURBED SOILS WITHIN RIPARIAN AREAS MUST BE AMENDEDTO PROVIDEAN OPTIMUM ENVIRONMENT FOR SEED GERMINATION AND SEEDLING
GROWTH,
2. THE pH OF THE SOIL MUST BE SUCH THAT IT IS NOT TOXIC AND NUTRIENTS ARE AVAILABLE.
3. SOILANALYSIS SHOULD BE PERFORMED TO DETERMINE NUTRIENTAND LIME NEEDS OF EACH SITE.
4. APPROPRIATE pH LEVELS ARE BETWEEN 5.5-7.
5. RIPARIAN BUFFERS REGULATED FOR NUTRIENT MANAGEMENT MAY BE LIMITED TO ASINGLE APPLICATION OF FERTILIZER.
6. SUITABLE MECHANICAL MEANS SUCH AS DISKING,RAKING, OR HARROWING MUST BE EMPLOYEDTO LOOSEN COMPACTED SOIL PRIOR TO SEEDING.
PLANTING
1. APPLY SEED UNIFORMLY WITH A CYCLONE SEEDER, DROP -TYPE SPREADER, DRILL, OR HYDROSEEDER ON A FIRM, FRIABLE SEEDBED.
2. IN FINE SOILS, SEEDS SHOULD BE DRILLED 0.25 - 0.5 INCHES. IN COARSE SANDY SOILS, SEEDS SHOULD BE PLANTED NO DEEPER THAN 0.75 INCHES.
MULCH
1. MULCH ALL PLANTINGS IMMEDIATELY AFTER SEEDING.
2. IF PLANTING ON STREAM BANKS STEEPER THAN 10% OR AREAS SUBJECT TO FLOODING, A BIODEGRADABLE ROLLED EROSION CONTROL PRODUCT IS
RECOMMENDED TO HOLD SEED AND SOIL IN PLACE.
MAINTENANCE
1. THE RECOMMENDED PERMANENT GRASS SPECIES MAY REQUIRE TWO YEARS FOR ESTABLISHMENT, DEPENDING ON SITE CONDITIONS.
2. INSPECT SEEDED AREAS FOR FAILURE AND MAKE NECESSARY REPAIRS, SOIL AMENDMENTS, AND RE-SEEDINGS.
3. IF WEEDY EXOTIC SPECIES HAVE TAKEN OVER THE AREAS AFTER THE FIRST GROWING SEASON, THE INVASIVE SPECIES MUST BE ERADICATED TO ALLOW
NATIVE SPECIES TO GROW.
4. MONITOR THE SITE UNTIL LONG-TERM STABILITY HAS BEEN ESTABLISHED.
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1
Burdette, Jennifer
From:[e-mail]
Sent:Sunday, November 29, 2020 12:00 AM
To:Burdette, Jennifer
Cc:[e-mail]
Subject:Pre-Filing Meeting is not needed for Oak Pointe Residential Subdivision - 20160285 Ver
3
The North Carolina Division of Water Resources has received the Pre-Filing Meeting Request Form for Oak Pointe
Residential Subdivision that you submitted on 10/29/2020 1:49 PM. The ID number for that project is 20160285, Version
3.

It has been decided that no meeting is needed for this project.

Project file link: https://edocs.deq.nc.gov/WaterResources/Browse.aspx?dbid=0&startid=1337517

When you submit your application please upload a copy of the attached document in this email.

This email was automatically generated by Laserfiche workflow. Please do not respond to this email address, as
responses are not monitored.