20150137 Ver 1_More Info Received_20150303

Brown's Environmental al Group, Inc.
Wetlands, Soils, Permitting
Brownenvgrpggmail.com
919 -524 -5956
February 25, 2015
a z
DWR 401 and Buffer Permitting Unit
1617 Mail Service Center MAR 0 8 2015 j
Raleigh NC 276991617 j
Re: PCN, Mt Pleasant Road Tract, DWR Project #2015 -0137
I am responding to a request for additional information from Cherri Smith of the Raleigh
Regional Office on February 15, 2015.
I have enclosed 4 copies of plans, 4 sets of narrative and calculations from the Storm
Water plan prepared by Dalton Engineers and updated page 8 of the PCN Section E. 2a..
Please contact me if you require any additional information.
Thank you
�v
Wyatt Brown, LS S
President, Brown's .Environmental Group, Inc
Enclosures

Vl1 �� � �- D'� �W � u °r•
0 L' I 'AAM n n gro4E 1
E.
Stormwater Management and Diffuse Flow Plan (required by DWQ)
1.
Diffuse Flow Plan 1
401 & BUFFER PERMITTING
1a
Does the project include or is it adjacent to protected riparian buffers identified
Yes X❑ No
within one of the NC Riparian Buffer Protection Rules?
1 b
If yes, then is a diffuse flow plan included? If no, explain why
Yes ❑ No
2.
Stormwater Management Plan
2a
What is the overall percent Imperviousness of this project?
12.48%
2b
Does this project require a Stormwater Management Plan?
0 Yes ❑ No
2c
If this project DOES NOT require a Stormwater Management Plan, explain why
2d
If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan
Refer to attached cover letter to Johnston County dated 12/29/14 from Dalton Engineers
2e
Who will be responsible for the review of the Stormwater Management Plan?
Johnston County, certified local goverment
3.
Certified Local Government Stormwater Review
3a
In which local government's jurisdiction is this project?
Johnston County
❑ Phase II
NSW
3b
Which of the following locally - implemented stormwater management programs
USMP
apply (check all that apply)
❑ Water Supply Watershed
❑ Other
3c
Has the approved Stormwater Management Plan with proof of approval been
/
© Yes No
attached?
4.
DWQ Stormwater Program Review
❑Coastal counties
❑HQW
4a
Which of the following state - implemented stormwater management programs apply
QORW
(check all that apply)
El Session Law 2006 -246
❑Other
4b
Has the approved Stormwater Management Plan with proof of approval been
❑ Yes ❑ No
attached?
5.
DWQ 401 Unit Stormwater Review
5a
Does the Stormwater Management Plan meet the appropriate requirements?
❑ Yes ❑ No
5b
Have all of the 401 Unit submittal requirements been met?
❑ Yes ❑ No
Page 8 of 10
PCN Form — Version 1 4 January 2009
JIrO94VJA1ek NIAAIAGr -,A4P 1' PI-Ak1 MAS 59rW APPRovgz B`( _Joi4,J5toA.1 C«,.JTY
RAIL-IC UT11.1711:.5 ) PEOWL1G 5uB#AI-rT4L_ of V/arLA1JnS br:LiAA=ArioL) MAP.

Dalton Engineering
and Associates, P.A. _
December 29; 2014
To: Johnston County p�
Department of Public Utilities.,
Post Office Bok 2263 -
North Carolina, 2777 - 5Smithfield, ' ' -5
SUB: 'Stormwater Management Statement°_ D NR WA £R RESoi "R Ee-
40I & $UFFE p
Mt. Pleasant Road Tract
it hnston`County, North Carolina
Owner: IOM Developers; Inc.
466 Stancil Road
Angier, NC 27501 =
( Note : revised due to change in; Ownership: )
Subject project involves the - development of approximately 23.72 acres of land that is located
- in the - Pleasant Grove' Townshi 'of Johnston County. This property is presently zoned AR
v
and is planned for 20 single- farriilylots with an average lot`size of approximately 51,660�sgft.-
each. -_ The lots will front on a standard NC DOT'street, with graded grass - lined ditches and
shoulders. Each,lot will,be served by public water from Johnston County and will have
individual- septic system's; approved by the Johnston County Environmental Health ,
Department.
,
The project is not located within an area that is defined_ as an Environmentally Sensitive
Area,, as -shown on.current maps provided by Johnston County. The impervious area is below'
the allowable limit indicated in the Ordinance.
The existing drainage patterns will remain, with the overland runoff into an unnamed
tributary to Middle Creek. This tributary is considered a "blue line" stream and will be
required to have 50' 'riparian buffers on each side of the stream. The existing drainage feature
downstream, Middle Creek, is large enough to `handle the additional runoff generated from
this project.
Impervious areas, within the project area, will be limited to roadway construction and lot
development. The impervious percentage for the Mt.,Pleasant Road Tract is based on the
"following assumptions:,
446-East Main Street ® P.O. Box 426 ® Clayton, NC 27528 ® (919) 550 - 4740 /Fax [phone]

• Dwelling 2,600. sgft.
y • Driveway, patio, etc. 2,380 "sgft. ;
Total 4,980 sgft. ;per lot !
Lots:, 4,980 sgft. k 20 lots-/ 43,560 = 2.29 acres
'Streets: roadway and 'cul -de -sac , = 0.68, acre
Total = 2.96 acres - r
t, 2.96 acres / 2332 acres = t2-.48 % impeivious:
Total nitrogen export - calculations have been'provided'(attached) -in accordance with current, - -
_, - - requirements of th e Johnston County Stormwater Ordinance. Calculations; based -on density, of housing, management of open space, total anticipated impervious` area, etc., indicated that
the nitrogen export (3.60`lb /ac /yr) does not exceed 3.60 lb /ac /yr and'would not 'require
payment to the, North Carolina'Ecosystem Eriliancemen't Fund,. _
T4e,6parian buffer shall,b6 utilized to filter the runoffbefore discharging off of the - property. ;
- iwaerunff will e alloweto heetflow thgthe bufer to maximize filtration stor f
r andmininiize "the rate of runoff. Measures wilt be applied that extend the, time of,,-
concentration and `reduce the peak, outflow from the project, The drainage area and potential =
runoff will be analyzed during the design phase, relativeto detrimental effects of increased -
runoff, 'from 'post- development conditions. This-includes analyzing effects to adjacent and,-'-
offi§ite,prop'erties and proposed onsite structures, such as,driveway culverts.
The construction process shall fully utilize a Sediment and Erosion Control Plan that wilf be ='
approved by Johnston County. -The pu`rpose,'of the Plan is to insure,that erosion stays'at a '
minimum and that sediment stays out of the streams and /or drainageways and on the project ,
,site. The Plan will utilize management practices such as•diversions; silt fence, level -
spreaders; sediment traps a_ nd ari aggressive vegetation plan to minimize and control erosion.
The Plan will be provided to'the Contractor as apart of the Construction Plans.,
If you have any questions or additional - comments, please call.
Thank you.
Jo athan arnes

VON,
SEDIMENT TRAP
Elm
LINT OF DISTURBANCE
DIVERSION DiTCH
CONSTRUCTION ENTRANCE
SEDIMENT FENCE / OUTLET
SEDIMENT FENCE
PIPE OUTLET PROTECTION APRON
CHECK DAM
►
ARC INLET PROTECTION
WETLANDS
OR
i•
THE DRIVEWAY • BE INSTALLED AT THIS TIME.
THE DRIVEWAY PIPES ARE SIZED PRIOR TO THE FINAL PLAT RECORDATION. AT
THAT TIME THE LOT LINES
)' DRIVLVAYS WILL BE IN THE3R FINAL LOCATION
AND THE DRIVEVAY PIPES CAN BE ACCURATELY
• f
GEORGEr fir„
DB3462 PGO336
161500-37-0287
SARAH J. WENVER
D81063 4
PIN 1 161500-26-8527
2e
1,
IMPERVIOUS1. LINE PIT WITH OR POLYETHYLENE SHEET. ANCHOR FABRIC INTO GROUND OUTSIDE
PIT AS SHOWN.
2. MAXIMUM WATER ! SEDIMENT DEPTH IS le. PIT MUST BE EXCAVATED AND Xi WHEN THE
DEPTH OF SEDIMENT REACHES le OR COMBINED WATER/SEDIMENT DEPTH EXCEEDS 12- FOLLOWING
WASHOUT OF A CONCRETE
ALLOW3. WATER TO EVAPORATE COMPLETELYA' F1 EXCAVATING
4. WASHOUT PIT MAY BE LOCATED NO CLOSER THAN 50' TO DRAINS, INLETS, OR SURFACE WATERS.
CONCRETE
t. WASHOUT
•
RONALD & DONNA
TART & TART INC. DB4322 PGO051
60 PGO382 PIN # 161500-49-5013
PIN t l
00-37-5630 //-CONSTRUc-nON
ENTRANCE (TYPY
97
PERMIT
J / e
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1-77
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0011,
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JAY & DORIS SHAFFER -- _ /'�.01
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D84490 PGO506 ` ,- — •'iii i' WT B
PIN # 161500-36-1991
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tr ,'/ ! /'/—�—` /r ! DB2429 PGQ716
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s iM NT DB2300 PGO003
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_COiDAM` t }t t D843331 PG0603
rs 1 •1� `� �'If PIN # 161500-46-2634
SEDT ® !TRAP #4�
/— t /
NEL #5CHRISTINE & MEGAN GREGORY
DB4146 PG0665
PIN # 161500-46-2724
JOHN & CAROLYN DEWYKE
D83360 PGO769
rJ �t ` ®r r—} t s y /} A gr PIN 161500-46-2614
.�14 *
r° f KENNETH & DEBRA GOODWIN
• / ! ° +. + 1 DB3761 PGQ629
,r 1 e` i t d 1 r PiN i 161500-46-2514
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,�� r�\� JENNIFER J. KELLER
• / DB3059
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JOSEPH MARGARET MARON—
DS4396 PG0692 ; N/F
PIN # 161500-25-7576 ND JR. SAULS
HC PINi.161500-36-5613
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DBO438 PGO105
PIN # 161500-45-1327
Y
SHOULDERS, SIDE DITCHES, AND SLOPES
3-1 AND STEEEPER
►
r ► TALL FESCUEU;
OR
ADD WEEPING LOVE GRASS
OR
;, . „ is
► i �l • . ,. �:,.,
�:
*Vlyvilt 17 MAI
***TALL FESCUE AND
***BROWNTOP OR GERMAN MILLET OR
***SORGHUM—SUDAN HYBRIDS
SERICEA LESPEDEZA fir ' ED
!
AND TALL FESCUE
w
SHOULDERS, SIDE DITCHES, AND SLOPES
FLATTER THAN 3:1
TALL FESCUE
•f
APRIL 15— JUNE 30
***TALL FESCUE AND
JULY 15 AUG 15
v..•., •• OR GERMAN i"
***SORGHUM -SUDAN HYBRIDS
SEEDs:;
ED Pomol"EPARATION
CHISEL COMPACTED AREAS AND SPREAD TOPSOIL 3 INCHES DEEP OVER -ADVERSE SOIL
CONDITIONS IF PRESENT.
RIP THE EN71RE AREA TO ,, 6 INCH DEPTH.
REMOVE ALL LOOSEROCK,ROOTS AND OTHER OBSTRUCTIONS
UNIFORMREASONABLY SMOOTHAND UNIFORM.
APPLY AGRICULTURAL LIME, FERTILIZER AND SUPERPHOSPHATE UNIFORMLY'AND MIX WITH
CON71NUE TILLAGE UNTIL WELL—PULVERIZED, FIRM, REASONABLY d IS
PREPARED, 4 TO 6 INCHES DEEP.
SEED ON A FRESHLY PREPARED SEEDBED AND COVER LIGHTLY WITH SEEDING EQUIPMENT
OR CULTIPACK AFTER SEEDING.
MULCH IMMEDIATELY AFTER SEEDING AND ANCHOR MULCH.
INSPECT ALL AREAS AND MAKE NECESSARY REPAIRS OR RESEEDINGS
CONSULTPLAN71NG SEASON, IF POSSIBLE. IF STAND SHOULD BE OVER 607- DAMAGED. RE—
ESTABLjSH FOLLOWING ORIGINAL LIME, FERTILIZER AND SEEDING RATES.
PERMANENT COVERESTABLISHED.
MAR 0 3' 2015
DEER . WATTFR RFSOtSRCIFS

•
AWT (RAI It T I jlj�j 11 �_-j I OR M g �llg
GU�IALL THE CHANNEL IMMEDIATELY FOLLOWING 'ME INSTALLATION fir THE Dfvl;!:Z ililtHES
AND TIE CHANNEL INTO SEDIMENT TRAP.
1URING THE ESTABLISHMENT PERIOD. CHECK GRASS -LINED CHANNELS AFTER EVERY RkNIFALL. AFTER GRASS IS
ESTABLISHED, PERIODICALLY CHECK THE CHANNEL; CHECK IT AFTER EVERY HEAVY RAINFALL EVENT. IMMEDIATELY
MAKE REPAIRS. IT IS PARTICULARLY IMPORTANT TO CHECK THE CHANNEL OUTLET AND ALL ROAD CROSSINGS FOR
Tmw srAsiLj7y AND EVIDENCE OF PIPING on scouR HOLES. -REMOVE ALL siGNwmw SEDIMENT ACCUlmuLATIONs
TO MAINTAIN THE DESIGNED CARRYING CAPACITY. KEEP THE GRASS IN A HEALIHY, MGQ%= CONDITION AT ALL
TIMES.
THE GRASS -LINED CHANNEL IS CONSIDERED A PERMANENT STRUCTURE AND SHALL REIMN FOLLOWING THE
COMPLETION OF CONSTRUCTION,
INSTALL THE CONSTRUCTION ENTRANCE BEFORE CLEARING/STRIPPING BEGINS ON THE SITE.
MAINTAIN THE GRAVEL PAD IN A CONDITION TO PREVENT MUD OR SEDIMENT FROM LE4VING THE CONSTRUCTION Sn�
THIS MAY REQUIRE PERIODIC TOP DRESSING WITH 2 -INCA STONE. IMMEDIATELY RiNOVE ALL OBJECTIONABLE
MATERIALS SPILLED, WASHED. OR TRACKED ONTO PUBLIC ROADWAYS.
REMOVE THE CONSTRUCTION ENTRANCE AT THE 71ME THE SUBDIVISION STREET IS BENG PREPARED FOR
FINE -GRADING AND THE RECEIVING OF A.B.C. STONE.
INSTALL THE DIVERSION DITCHES IMMEDIATELY FOLLOWING THE COMPLETION OF CIMING WI7HIN THE STREET R/W.
r
.NSPECT DIVOWN DITCHES AFTEREvERYRAINFALL DURING THE CONSTRUCTION OPi2RATION. IMMEDIATELY REMOVE
ANY OBSTRUCTIONS AND/011 SEDIMENT FROM THE FLOW AREA AND REPAIR THE DNV�SION RIDGE. CHECK OUTI-Eft
AND MAKE TIMELY REPAIRS AS NEEDED.
TWERSION DITCHES. WHICH DURING THE ROUGH -GRADING PROCESS ARE CONVERTED PfTO ROADSIDE DITCHES, ARE
CONSIDERED PERMANENT STRUCTURES AND SHALL REMAIN FOLLOWING THE COMPLETION OF CONSTRUCnom.
TRENCH
WIRE
FENCE
240
J_
-7
s9 -X;•-
AND COMPACT
STEEL FILTER FABRC THOROUGHLY
A
80
Z'r
MIN
INSTAL TION, MAINTENANCE, AND REMOVAL SCHEDULE FOR SEDIMENT FENCE
INSTALL SEDIMENT FENCE IMMEDIATELY FOLLOWING THE COMPLETION OF CLEARING ON THE LOT.
INSPECT SEDIMENT FENCES AT LEAST ONCE A WEEK AND AFTER EACH RAINFALL WAKE. ANY REQUIRED REPAIRS
IMMEDIATELY.
SHOULD THE FABRIC OF THE SEDIMENT FENCE COLLAPSE, TEAR, DECOMPOSE, OR BECOME INEFFECTIVE, REPLACE IT
PROMPTLY.
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.
LAND QUALITY MUST BE CONTACTED FOR AN INSPECTION PRIOR TO REMOVING ANY TEMPORARY DEVICES.
AFTER LAND QUALITY INSPECTION AND APPROVAL REMOVE ALL FENCING MATERIALS AND UNSTABLE SEDIMENTS
DEPOSITS AND BRING THE AREA TO GRADE AND STABILIZE IT AFTER THE CONTRIBUTING DRAINAGE AREA HAS BEEN
PROPERLY STABILIZED.
STAKE TO
e.j smr9^mT ... a--
�WTT-Ntll.
�=lz�sltj•
OKI.-
•
II
USE NORTH AMERICAN GREEN $150 BN OR AN EQUIVALENT LINING
WHERE STRAW W/ NET HAS SMi SPECIFIED AS ROADSIDE DITCH LINING.
FILTER FABRIC
TOP OF SILT FENCE
MUST BE AT LEAST 1
ABOVE THE TOP OF
THE WASHED STONE
BURY WIRE FENCE AND HARDWARE CLOTH -*'-
5ECTIQN VIES!
e MK
N NJs
BURY WIRE FENCE,
FILTER FABRIC,
AND HARDWARE
CLOTH IN TRENCH
COIR MESH OR SIMILAR, STAPLED OR
TRENCHED INTO BOTTOM OR SIDE
CROSS-SECTION OF A POROUS BAFFLE IN A SEDIMENT TRAP
NOT TO SCALE
12- MIN. OF NCDOT #5
IA #57 WASHED STONE
A mlic-� I
DESIGNED SErTLED
Top OVERFILL W
21' MIN. FOR SETTLEMENT
4' MIN.
0
p
CLASS I
RIPRAP EMERGENCY
SPILLWAY
o KI
FR DEWATERING
SEDIMENT TRAP
NOT SCALE
'A
* *EXTENSIONS OF TIME MAY BE APPROVED BY THE PERMITTIN.f
AuTHoRrry wED ON WEATHER OR OTHER SITE SPECIFIC
CONDITIONS THAT MAKE COMPLIANCE IMPRAILE."
"SE,MON
INSTALL THE ARC FILTER INLET PR07F=ION STRUCTURE IMMEDIATELY FOLLOWING THE INSTAUA71ON OF THE ROADWA)v
CULVERr.
INSPECT THE FILTER AFTER EACH RAIN AND MAKE REPAIRS AS NEEDED.
REMOVE SEDIMENT AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR SUBSEQUENT RAINS.
WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN ADEQUATELY STABIL2ED, REMOVE ALL MATERIALS AND ANY
UNSTABLE S014 AND EITHER sAuvAGE OR oisPosE OF IT PROPERLY. BIRING THE DISTURBEI) AREA TO PROPER
GRADE, THEN SMOOTH AND COMPACT IT. APPROPRIATELY STABILIZE ALL RARE AREAS AROUND THE INLET OF THE
CUUkl_!Kr.
Z. IIJIII�� 71,"Jilii 1,41V4011T
4
•
WMINZ111
zl!
FILTER FABRIC
STA131LIZAMON TIME
OR FILM BLANKET
FRAME EXCEpnoNs
PERIMETER DIKES,
0
5�
SWALES, DITCHES,
APRON
THICKNESS STONE
MIN .
THICKNESS
AND SLOPES
(CFS)
(INCHES) (Fr.) (Fr.) (FT.) (INCHES)
HIGH QUALITY
(REOD.)
HIGH OLIALITY
WA7ER (HQW)
3.
WATER (HOW)
ZOINES
ir . A
ZONES
SLOPES STEEPER
58.90
IF SLOPES ARE 1 W OR
THAN 3:1
LESS- IN LENGTH MD ARE
NOT STEEPER THAN 2.1.
14 DAYS ARE ALLOWED.
OUTLET PROTECTION
7 DAYS FOR SLOPES
GREATER THAN 550 FEET
NOT 70 SCALE
IN LENGTH
ALL OTHER AREAS
NONE
W" SLOPES FLATTER
(EXCEPT FOR
THAN 4-1
PERIMETERS AND
HQW ZONES)
* *EXTENSIONS OF TIME MAY BE APPROVED BY THE PERMITTIN.f
AuTHoRrry wED ON WEATHER OR OTHER SITE SPECIFIC
CONDITIONS THAT MAKE COMPLIANCE IMPRAILE."
"SE,MON
INSTALL THE ARC FILTER INLET PR07F=ION STRUCTURE IMMEDIATELY FOLLOWING THE INSTAUA71ON OF THE ROADWA)v
CULVERr.
INSPECT THE FILTER AFTER EACH RAIN AND MAKE REPAIRS AS NEEDED.
REMOVE SEDIMENT AS NECESSARY TO PROVIDE ADEQUATE STORAGE VOLUME FOR SUBSEQUENT RAINS.
WHEN THE CONTRIBUTING DRAINAGE AREA HAS BEEN ADEQUATELY STABIL2ED, REMOVE ALL MATERIALS AND ANY
UNSTABLE S014 AND EITHER sAuvAGE OR oisPosE OF IT PROPERLY. BIRING THE DISTURBEI) AREA TO PROPER
GRADE, THEN SMOOTH AND COMPACT IT. APPROPRIATELY STABILIZE ALL RARE AREAS AROUND THE INLET OF THE
CUUkl_!Kr.
Z. IIJIII�� 71,"Jilii 1,41V4011T
4
•
WMINZ111
zl!
INSTALL THE PIK OUTLEr PROTECTION APRON IMMEDIATELY FOLLOWING THE INSrAUAlION OF THE ROADWAY CULVERT.
!NSPECT RPW OUTLET STRUCTURES AFTER, HEAVY RAINS TO SEE F ANY EROSION AROUND OR BELOW THE RIPRAP
HAS TAM PLACE OR IF STONES HAVE BEEN DISLODGW. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO PREVENT
'o"URTHER DAMAGE
rTIPE OUTLET PROTECTION APRONS ARE CONSUMED PERMANENT STRUCTURES AND SHALL REMAIN FOLLOWING THE
COMPLETION OF CONSTRUCTION.
FILTER FABRIC
OR FILM BLANKET
PIPET
0
5�
D
3O
LA W DMAX
APRON
THICKNESS STONE
MIN .
THICKNESS
PIPE MA.
(CFS)
(INCHES) (Fr.) (Fr.) (FT.) (INCHES)
(CALC.) CLASS
(REOD.)
I ro
3.
V 40 4.5" 6!1
ir . A
120
"36-0
58.90
9.01
fe
OUTLET PROTECTION
NOT 70 SCALE
INSTALL THE PIK OUTLEr PROTECTION APRON IMMEDIATELY FOLLOWING THE INSrAUAlION OF THE ROADWAY CULVERT.
!NSPECT RPW OUTLET STRUCTURES AFTER, HEAVY RAINS TO SEE F ANY EROSION AROUND OR BELOW THE RIPRAP
HAS TAM PLACE OR IF STONES HAVE BEEN DISLODGW. IMMEDIATELY MAKE ALL NEEDED REPAIRS TO PREVENT
'o"URTHER DAMAGE
rTIPE OUTLET PROTECTION APRONS ARE CONSUMED PERMANENT STRUCTURES AND SHALL REMAIN FOLLOWING THE
COMPLETION OF CONSTRUCTION.