NCC204947_MODIFICATION Supporting Documents_20221115 (2)

/ j '� �\ ^ - I / // • \ \ > / _ \ \\ \\ \ \ \ CONSTRUCTION SEQUENCE
If STAGE 1
1. SCHEDULE A PRE -CONSTRUCTION CONFERENCE WITH JOHNSTON COUNTY PUBLIC
• /• - - - • I / / l /` / / / �/ / - _ / \\ \ - - - UTILITIES.
2. AFTER THE PRE -CONSTRUCTION MEETING IS HELD, THE CONTRACTOR CAN DELINEATE
/ • ` _ I /
THE TREE LINE /DISTURBANCE LIMIT LINE AND INSTALL INITIAL EROSION CONTROL
I _ \ ` \ I /✓ / / / / / / / / / - / / / - _ - ` - _ z = / MEASURES ONLY. THIS INCLUDES, BUT IS NOT LIMITED TO, CONSTRUCTION ENTRANCE,
SILT FENCE/TREE PROTECTION FENCE, TEMPORARY SKIMMER BASINS, TEMPORARY
RISER BASIN #3, AND EXISTING INLET PROTECTION. PERMANENT POND #4 (TRB#3) WILL
REMAIN ATEMPORARY RISER BASIN THROUGH CONSTRUCTION OF THESE PHASES.
INSTALL i / / EXCAVATE THE TEMPORARY RISER BASINS AND THE TEMPORARY SKIMMER BASINS AND
REINFORCED _ _ / \ / / o / ADD THE FAIRCLOTH SKIMMERS AND THE COIR BAFFLES. ONCE THESE BASINS ARE
OUTLET ° / _ / / i INSTALLED AND OPERATIONAL, CONSTRUCT THE TEMPORARY DIVERSION
CHANNEUBERM. INSTALL SUBSURFACE DRAINAGE CI 78A, CI 78 TO EXISTING CI 14 FOR
/E ( P // // OUTLET OF SKB-3. ONCE PERMANENT POND 3 BASIN IS COMPLETED, INSTALL
����„/ / SUBSURFACE PIPING FROM FES 20C TO MH 20B JUST SHORT OF MH 2OA. 30" RCP TO BE
EXTENDED AS TEMPORARY INLET FOR POND 3. INSTALL DIVERSION BERM TO DIRECT
• ` \•� \ \ \ I / / / - - \ \ \ \ CLA S A RIPRAP 242 / / / / INST �d / / / / / UPSTREAM FLOW TO 30" RCP TO POND 3 ALONG WITH ALL OTHER TEMPORARY
F - - - �245-/� / / / / / RE—) I4FOI,ED / / /
/ / DIVERSIONS.
• \ i ;_ \ \\ \\ I / // // / / I / - / _ \� \ \ \ \ / / / ' �/ / / 25oJTLZi / / / / ' 3. LIMIT CLEARING AND LAND DISTURBING ACTIVITY TO ONLY THE AREA NECESSARY TO
•I / \ \ I / / / / _ - / \ \ / / /j / / INSTALL THE PERMITTED MEASURES.
__Z 5 / / 4. CALL JOHNSTON COUNTY PUBLIC UTILITIES FOR AN ONSITE INSPECTION TO CONTINUE
�/ I / ` • \. \ \ \ / / / / / ' I �/ \ \ \ - COj"AFFLE (TYP.)� / / / i / / / / CONSTRUCTION.
` \ / / I •\ \ \ \ I �/ ( / I \ �F - _ ' - - - / / / ` - ' / / / // �/ / / / 5. UPON APPROVAL OF THE STORMWATER SITE INSPECTION, COMMENCE PERMITTED LAND
DISTURBING ACTIVITY - CLEARING AND GRUBBING FOR STAGE 1. ALL EROSION
" ` • / • _ _ -� / Y ` ,/ - `I \ \ \ \\ \ \ \ /\\ C, I / I I / / I r CONTROL MEASURES SHALL BE INSPECTED AND MAINTAINED, IF NEEDED, AT LEAST
• / J / / / 1 > J \ \ /� \ \ ,) I \ \ / 24j - / / / / / �' / / / // / ONCE PER WEEKAND AFTER EVERY RAINFALL EVENT.
/ T MPORARY D4VERSION 3
/ I \ \ - - - - - - INSTrLL CLASS B INST&L CLASS B 250� / / / / 593 LF @ 2.33°!n w/10 1(�3: ) / / / / / /
�� STONE RIP -RAP / �/ AID SCbPES STAGE 1A
/ / / / /� ` / Y • EXISTING " \\ \ \ \ \ _ _ - - _,STONE RIP RAP- / /
WETLANDS• - - - - - - ' _ _ SKB-2 / _ / / / // / / .PdAG DS7�TEMP9RAR'(tTNER
`/ / / // / , ` / / - • / �= \\ \\ ��' ��' \ \ \ \ \ /� I I \ / - - - - - - - - AGE AREA' 2.49 AC / / / / / / �260� / / / / 1) IN ORDER TO BRING PHASE 3 AREA TO GRADE CONTINUE INSTALLATION OF
/ / / \ \ 1STURBEDAREA 2,49 / j' // / / / / / / / / / / / / / // / SUBSURFACE DRAINAGE FROM 30" RCP TO MH 2OA, CI 20, CI 21, CI 21A, AND FES 21B.
X` , \ 0� \ \\ \ \ \ \ I �2 REQH1'R ED SA /2,962 SF / / / / / / / / J / / INSTALL HORSESHOE INLET PROTECTION AT FES 21 B. BRING GRADES UP AS
/ / / - • > \\ J� \ \ \ \ / - - - PROVIDED S / 3,201YSt'r
\ \ \ \ \ \/\ \ \ \ \ \ / / ^ 250� - - - ' REQUIRED TORAGE 4 480 CF / �/ / / / / / / / / / / / / APPROPRIATE AND INSTALL TEMPORARY INLET PROTECTION AS STRUCTURES ARE
\ �\ \\ \ �F \ \ \ I I - - / - - PROVIDED STORAGE/ 5,472 CFi INSTALLED. INSTALL DIVERSIONS AS NECESSARY TO DIRECT FLOW AS SHOWN ON
TOP-DWENStON 40'(W)x89:(LK'(D) / / / / / oo / / / / z65 APPROVED PLAN.
T€1GIPORARY DFVERSION 4 � 1.5'O SKIMMER 1 "O-BRIFICE / / / / 2 /
157 LF @ 1.76/° w/3:1(k,, T071(R) / / / / / 2) AT MAIN ENTRANCE TO PHASE 3 OFF OF CORNWALLIS ROAD INSTALL SUBSURFACE
/ / DRAINAGE AT ENTRANCE FROM CI 83A, C183B, MH 83C TO FES 84C. INSTALL
F / / SIDE SLOfSES / l � � / / / / /
.....t \ \ \ \/ \ \ ACM ACScSS AN \ NA 8975 TEMP ARY LINER/ /� / TEMPORARY INLET PROTECTION AS STRUCTURES ARE INSTALLED.
` \\ \ / \ \ M TENA%E %
TEYPORA Y DIVERWN 5
/j/ / / o I / / 70 LF @�.40% wKO:1(L), 3: (I�
_ - / SIDE SLOPES /
_ - - / INS ��\ \ \� /// / j = - l i I / / / I / / / GROUND STABILIZATION
\ �\ / \ i - - / ���\ � \ I I// /A /� - \\ � / / / / / / / N'AG DS�150 TE�1PORAf�Y LINE f ,/ /
•/ / // / / / h\ �235 \�-\ � �\ / /�/�/ (INSTALL CHECK // V /
236 - \ — % /ti// ��/ / DAM P.) /
OIRBAFFCE M / �, \\ / // / / \ \ \24
/i// _ JNSzaLULAss� l f ///// // / / / / /�j \
/ ////// // / / / / / / INSTALL ' ST E RIP RAP \ ✓ / // / / / / / / /- -
-REMFORCED— 1 z / //� / / /
% OUTLET
/ 240� /j/\\
N7EXISTING POND 4
40 /O D/%//
-4
B-LF2�0DE SLOPES \\\\\ \\ \\t\�\\
AGEAREA -r77 AC 245 TEMPORARY RISER BASIN 4
E'6WY LINER
/
l
SITE AREA
STABILIZATION
STABILIZATION TIME
DESCRIPTION
TIME FRAME
FRAME EXCEPTIONS
Perimeter dikes,
swales, ditches
7 days
None
and slopes
High Quality
Water (HOW)
7 days
None
Zones
Slopes steeper
7 days
If slopes are 10' or less in length and
than 3:1
are not steeper than 2:1, 14 days allowed
Slopes 3:1 or
14 days
7-days for slopes greater
flatter
than 50-feet in length
All other areas
None
with slopes flatter
14 days
(except for perimeters and
than 4:1
HOW Zones)
DIST.0 D AREA- 1. ,Y
--REQUIRED-SA2,105 Sfi / \ ��� / /// / \\\\\ \\ \ \ \ / / / / / / / / o / I I "Extensions of time may be approved by the permitting authority based on weather
P$
OVMED SA 2 176 SF / S CI'15� / \ \ / ��� \ \\ �\ \ t I / / / 2�h / / / / I I or other site -specific conditions that make compliance impracticable." (Section 11.13 (2)(b)
REQUIRAGF,,190CFi_— BASIN REMOVAL SEQUENCE
/VI ED DST�RPPE 3,�962E / �_- - J/ \�\ CI
TOP DIMENSION 33'(t4x66''(L)x2'(D)- INSjALi�CLW-B /' �\ � ��� � - _ - _ _ _ - \
1 5"O SKI Ef21 2r0 ORIF E� \ \ IP�RP \ \ I / / / I I
---��/� _J� -STON�-RIP/� / / I I I I
` _ __ _ = ��� \ / \ 4�R�1� o \ \ / / / 1 I 1. SCHEDULE A SITE MEETING WITH THE ENVIRONMENTAL INSPECTOR TO DETERMINE IF A
=
BASIN CAN BE REMOVED. INSTALL SILT FENCING OR OTHER TEMPORARY EROSION
J CONTROL MEASURES AS NEEDED PRIOR TO REMOVAL OF THE BASIN.
TEMPQRARY DIVERSION- / - -�/� / 2. REMOVE BASIN(S) AND ASSOCIATED TEMPORARY DIVERSION DITCHES. IF CULVERT PIPES
/ 2 OIL 75 w13:1 SIDE SLOPES / / / - - / - - \\ \ \ \ \ \ \ \ \ \ 10 / ) NEED TO BE EXTENDED, PERFORM THIS OPERATION AT THIS TIME. FINE GRADE AREA IN
/ / - - - - - / - - \\ 1 \ \ \ 2 / / / / PREPARATION FOR SEEDING.
�dAG17S75 TEMPORAL LINEF� / / / / / �� \ \ \
/ / / \ \ \ \ \ \ �� \ \ / , / / / ti 3. PERFORM SEEDBED PREPARATION, SEED, MULCH AND ASPHALT TACK ANY RESULTING
INSTALL 21'LT / - INSTALtCHECK / - / �` / / -� \ SNi GHEGK\ \\ \ \ \ \ ` I I /
/ - / / / - \ \`�A (,`�. 1 \ BARE AREAS IMMEDIATELY.
/ I / F�'NCE/( YP.) - DAM (TYP.) - , / / / ` \ \ \ \ \ \ I / 4. INSTALL VELOCITY DISSIPATORS AND/OR LEVEL SPREADERS AS REQUIRED ON THE
EROSION CONTROL PLAN.
\ 5. WHEN SITE IS FULLY STABILIZED, CONTACT ENVIRONMENTAL INSPECTOR FOR APPROVAL
IV RSI \ \ \ \ \ \ \ \ \ / / / / / OF REMOVING REMAINING TEMPORARY EROSION CONTROL MEASURES AND ADVICE ON
_ — _ \ EM�oI�aRIY d olv 1 I 1 I \ \ \ 1 \ \ I
�2.4 J / I / II \ \ \ \ \ / / / /L� @ 6.1 SIDE\ LOPES WHEN SITE CAN BE ISSUED A CERTIFICATE OF COMPLETION.
/ / / \ NA S7 T M OR RY LIN
r ��� \11111
0o,�� EROSION CONTROL NOTES
U,
ALL CONSTRUCTION SHALL BE IN ACCORDANCE WITH STATE AND LOCAL REQUIREMENTS.
// LISTING
\,�j0' SCM ACCESS \ \ \ \\J \ ` I ` SUFFICIENT EROSION CONTROL PRACTICES MUST BE INSTALLED AND MAINTAINED TO
�AND MAINTENANCE EASEME T / \ \ \ ?bo _1� / / 6 I I \ \ �\ \ RETAIN SEDIMENT WITHIN THE BOUNDARIES OF THE SITE. GROUND COVER STABILIZATION
O BE REL0�6ATED / \ \ \ \ \ \ \ \ \ \ o \ \ \ \ \ ` \ \ \ \ \\\ - SHALL BE IN ACCORDANCE WITH NPDES PERMIT AND STABILIZATION CHART ABOVE.
/� / / / / / / /� �'� / \ ✓ / \ ` / I\ ^ 1 \ i TEMPORARY GROUND COVER WILL BE INSTALLED ON ALL EXPOSED SLOPES IN 7 OR 14
S4\ \ \ \ \� \ \ \ \ �z�o \ — \ \ DAYS.
IN, \ \ / \ \ / \ \ - - - \ \ \ \ \\� \ \ - MAINTENANCE: ALL EROSION AND SEDIMENT CONTROL PRACTICES TO BE INSPECTED
WEEKLY AND AFTER EVERY RUNOFF PRODUCING RAINFALL EVENT. NEEDED REPAIRS WILL
s` \� I \�\ \-- \`_-/ \ \ \ 2� \ BE MADE IMMEDIATELY.
INSTAL`�C1'IECK , o SKB-3 \ /\� \ - \ \
DAM (TYP) - AGE AREA 2 AC
DIST B� AREA 4.0 AS \ \ \ \ REQUIRED S31'e5o �3 SF\ \ \ \ \ \ / \ \ / \ - _ _ - - - - - - J / / - J \ \ \ \ I > MAXIMUM GRADED SLOPE SHALL NOT EXCEED THREE (3) TO ONE (1).
-TEMPGRARY DIVERSION 9- - PROMEDSA �2,450 SF \ \ \ \ \ \ -
° \ REQUIRED STORAGE 3,�550 CF \ \ \ \ I 205� - - - / �26 J \
50 - 21LF @253%w/6:1(L), 3:1(R) \ \ \ \ \ / \ ( - - TOTAL DISTURBED SOIL AREA IS 45 ACRES.
24 \ \ \ \ \ TEMPO[ DIVERSION\ 0 \ I I / -
-1 Phfl IDED STORAGE 4,0�2 CF \ --
\/�\SIDEESL9PE3- - - - - TOP �D AEVSION 35'K)x70'(L)xx '(D) \ I - - 265 / _-
` idAG DSZ�TEMPORARY LINER \ \ \ \ \ 720 LF 4. % w/3:1 SIDE LOPES \ - - - - - -
--_ �5"OSKIMMfsR1.3"OOI�IFICE \ \ 2 \ \ @ --- --- _---
�` 'NAG DS150T 'CRARY LII\kR \ I I I - - - - - - / - / / J J STOCKPILE NOTES:
---
INSTAL --/ / \\ \ \\ \\ \ \� \\ �\ \ \ \ I I I I 1 \/ /- //�-- 270�
\ - ` \ �8 \� �� \ \ -245� INSTALL CLASS`g \ \ 2So \ I ` \ J / - - - - - \ 1. HEIGHT SHALL NOT EXCEED 35 FEET.
\ �-7 - - ��M \ - - - - STONER RAP \ \ \ \ I I N / / \ / / / - - - 2. SLOPES SHALL NOT EXCEED 2:1
IRFST9�L INLET_ C24 \ \ \ \ \ /h < \ \ \ \ \ \ ` I J / /-270
\ / M �ROTECIION (TYP.� - - \ COTR BAFFLES \ / / \ \ 270 / - - - \
\ \ \ \ // \ \ \ \ \ \ \ I l / / / / \ \ l STOCKPILE MAINTENANCE REQUIREMENTS
\ \INSTALL CLd B \ // \ \` \ \ \ / \ ✓ 1-1
\�
8 S�E 0 RIP RAP
C�8
r� � � 1. SEEDING OR COVERING STOCKPILES WITH TARPS OR MULCH IS REQUIRED AND WILL REDUCE EROSION
\ 1 \ \ // / �\ \ \ \ \./ \ \ I / / / / \ \ - ' / / / / PROBLEMS. TARPS SHOULD BE KEYED IN AT THE TOP OF THE SLOPE TO KEEP WATER FROM RUNNING
INSTAL CHE�K / / / _ � � / / ti UNDERNEATH THE PLASTIC.
DAM ( \ / 2. IF A STOCKPILE IS TO REMAIN FOR FUTURE USE AFTER THE PROJECT IS COMPLETE (BUILDERS, ETC.), THE
/ \ / /
o / / - �, / / FINANCIAL RESPONSIBLE PARTY MUST BE NOTIFY WAKE COUNTY OF ANEW RESPONSIBLE PARTY. THAT
/ / / / STOCKPILE.
3. THE APPROVED PLAN SHALL PROVIDE FOR THE USE OF STAGED SEEDING AND MULCHING ON A CONTINUAL
\\ \\\� — r/ / i \-- ✓
_- BASIS WHILE THE STOCKPILE IS IN USE.
\ \\\ \ \� - I I I I I 2\ V 0 / / / -� / / / 4. ESTABLISH AND MAINTAIN A VEGETATIVE BUFFERAT THE TOE OF THE SLOPE (WHERE PRACTICAL).
� - � /INSTALL SILT
\ \� \ \\ ��� \\ — _ _ _ — / / EROSION CONTROL LEGEND
� \\\ /',� \ A / a•w - /FENCE TYP!j � � � \
\\ EXISTING 11 I I \ ' M ( INS ItCI�ECTNION / / / \
POND 1 /// \ I I) I I 8„ -r - //� / / // / \ �1 - J \ \\� / / �� TEMPORARY DIVERSION DITCH
//)I 1/1/Jr �� / - w" u, l / 48 / / / z6 \ TEMPORARY SILT FENCE
1 lJJ// m —� / M), // s����\�����
REINFORCED SILT FENCE OUTLET
/ // / / I I / - - - - = = - - - - O �► TEMPORARY SILT BAG
INN\11l / l INLET PROTECTION
\ �� /// // / // o / / ❑ / // / -� \ \ / / / / o / 1 - ^ 275 1 v O TEMPORARY BLOCK & GRAVEL
/// / / //' - - -_ / � M l \ \ / / / / / / / 53 /N /- - - - / r - - `- - - _� / \ N � INLET PROTECTION
/ / / / / // / / / \
�� ---
\\\�7GGINGpP� - LIMIT OF DISTURBANCE
\\\ \ \ � � /�// r � � ' / / ❑ l l / � ss\ 1 `— \ \ / � �, � J l I l I � III 56 I � 57 58 I I
\ \ \ = = // \ / / % I / / / / /�255� a•• I` -� I I III I I I IN ❑ I I ❑ I I� EXISTING TREE LINE
\ \� \ \ \ \ \\ \\ \ / // / I - \ \,' / / ❑ // l �// \ - / / Rl / 8 wM �' I I I I I I I I I / NEW TREE LINE
wM "- I �270 JI I I_ I I III I I I TEMPORARY ROCK CHECK DAM
11�_ � III
A\\ \1 / ?
13
CONCRETE WASH AREA
\ s - s^w J - 5
/ / / - M - - - _ RIPRAP APRON
\\
NORTH
' — —I IF .01 61
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CE GRO I T
301 GLENWOOD AVE. 220
RALEIGH,NC 27603
PHONE. [phone]
FAX [phone]
www.cegroupinc.com
License # C-1739
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Date:
MARCh 3 1 , 2021
Scale:
I"=60'
Drawn:
RJ h
Checked:
AJF
Project No.
1 27-239
Computer Dwg. Name
1 27-239 ph2-4 stage I ec
Sheet No:
7