20191297 Ver 1_More Info Received_20191127

Strickland, Bev
From:Eva King <[e-mail]>
Sent:Wednesday, November 27, 2019 12:34 PM
To:Sullivan, Roscoe L III CIV (US); wyatt brown
Cc:Goss, Stephanie; Williams, Andrew E CIV USARMY CESAW (USA)
Subject:\[External\] RE: \[Non-DoD Source\] Fwd: SAW-2019-01488 Request for Additional
Information, (Academy Pointe), Johnston County, NC (UNCLASSIFIED)
Attachments:C4.01 - EROSION CONTROL-C4.09.pdf; C5.04 - SCM DETAILS-STORMWATER
POND.pdf; C5.01 - GRADING & DRAINAGE-C5.01.pdf
CAUTION: External email. Do not click links or open attachments unless you verify. Send all suspicious email as an attachment to
[e-mail]

Ross,
I see what you are referring to. It appears we didn’t catch the grading and erosion control discrepancy on the plans
before sending them to you. My apologies.

Attached are updated Grading, ESC and SCM Details sheets showing a 6’retaining wall that will limit the stream impact
to 119LF, allowing an additional foot for construction activities if needed.
We proposed the retaining wall because the steep grades forced us to play catch up with the existing grade and
increased the stream impact to an unnecessary length. Unfortunately, though, we failed to update the plans before
sending them to you.

As I would like to get this project wrapped up before you get transferred, please let me know if this is sufficient or it you
require any additional information from us. Phone calls are always welcome.
Thank you,

Eva King, PE
Adams & Hodge Engineering, PC
314 E. Main Street
Clayton, NC 27520
(M) 980-253-5773
Firm # C-4187

From: Sullivan, Roscoe L III CIV (US) <[e-mail]>
Sent: Wednesday, November 27, 2019 11:25 AM
To: Eva King <[e-mail]>; wyatt brown <[e-mail]>
Cc: stephanie goss <[e-mail]>; Williams, Andrew E CIV USARMY CESAW (USA)
<[e-mail]>
Subject: RE: \[Non-DoD Source\] Fwd: SAW-2019-01488 Request for Additional Information, (Academy Pointe), Johnston
County, NC (UNCLASSIFIED)

CLASSIFICATION: UNCLASSIFIED

1

Eva,

Thanks for the information.

However, the “Wetland Impact Map” does not match what is shown on the most recent plans as described in my email
below. The “Wetland Impact Map” proposes to impact only 120 linear feet of stream; whereas, the impacts on the
“Overall Erosion Control Plan” (sheet C4.07) measure to be approximately 145 linear feet of stream impact as measured
from the headcut to the end of the proposed riprap dissipator pad (see attached file with my notes and the Wetland
Impact Map for comparison).

Do the most recent plans accurately show the proposed project? If so, please revise the “Wetland Impact Map” to
reflect the changes. If not, please provide accurate plans that match the “Wetland Impact Map.” I need to have an
accurate accounting for what is being proposed by the project.

Feel free to give me a call to discuss as it may be easier to ensure we are on the same page.

Also, note that next Friday is my last day in the Raleigh Regulatory Field Office as I am moving to another Corps office.
Therefore, I have included Andy Williams (email: [e-mail]) in the email as he will be helping
out with Johnston County projects after my departure.

Best regards,

Ross Sullivan

Ross Sullivan, PWS, ISA Certified Arborist
Regulatory Specialist
Raleigh Regulatory Field Office
U.S. Army Corps of Engineers - Wilmington District
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Office #: 919-554-4884. Ext. 25
Email: [e-mail]

We would appreciate your feedback on how we are performing our duties. Our automated Customer Service Survey is
located at: https://cops.usace.army.mil/sites/RD/ORM2_Blog/_layouts/15/WopiFrame.aspx?sourcedoc={AE95B1BE-
995E-4A7E-9968-B619432F7CEB}&file=National_Customer_Survey_for_Dec_2018.xlsx&action=default

From: Eva King \[mailto:[e-mail]\]
Sent: Wednesday, November 27, 2019 9:48 AM
To: Sullivan, Roscoe L III CIV (US) <[e-mail]>; wyatt brown <[e-mail]>
Cc: stephanie goss <[e-mail]>
Subject: RE: \[Non-DoD Source\] Fwd: SAW-2019-01488 Request for Additional Information, (Academy Pointe), Johnston
County, NC (UNCLASSIFIED)

Ross,
The last sentence should read Given all the above information it is our opinion that the proposed wet pond
design/location minimizes the impacts to waters to the maximum extent practical.
In regards to the increase impact, the information given on the Wetland Impact Map is correct.

Eva King, PE
Adams & Hodge Engineering, PC
314 E. Main Street
2

Clayton, NC 27520
(M) 980-253-5773
Firm # C-4187

From: Sullivan, Roscoe L III CIV (US) <[e-mail]>
Sent: Wednesday, November 27, 2019 9:41 AM
To: wyatt brown <[e-mail]>
Cc: Eva King <[e-mail]>; stephanie goss <[e-mail]>
Subject: RE: \[Non-DoD Source\] Fwd: SAW-2019-01488 Request for Additional Information, (Academy Pointe), Johnston
County, NC (UNCLASSIFIED)

CLASSIFICATION: UNCLASSIFIED

Hey Wyatt,

The engineer’s response to item 1 does not appear to be complete as the last sentence is left unfinished. Can you
provide the complete response?

Also, the plans (Sheets C4.07, C5.01, and C5.04) submitted in your response appear to show more impacts to the stream
below the stormwater pond than the “Wetland Impact Map” submitted with the PCN application submitted to the Corps
on 9/26/2019. If this is a change, please revise the “Wetland Impact Map” to show the actual amount of impacts
proposed by the project.

Best,

Ross

Ross Sullivan, PWS, ISA Certified Arborist
Regulatory Specialist
Raleigh Regulatory Field Office
U.S. Army Corps of Engineers - Wilmington District
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Office #: 919-554-4884. Ext. 25
Email: [e-mail]

We would appreciate your feedback on how we are performing our duties. Our automated Customer Service Survey is
located at:
Blockedhttps://cops.usace.army.mil/sites/RD/ORM2_Blog/_layouts/15/WopiFrame.aspx?sourcedoc={AE95B1BE-995E-
4A7E-9968-B619432F7CEB}&file=National_Customer_Survey_for_Dec_2018.xlsx&action=default

From: wyatt brown \[mailto:[e-mail]\]
Sent: Sunday, November 10, 2019 10:44 PM
To: Sullivan, Roscoe L III CIV (US) <[e-mail]>
Subject: \[Non-DoD Source\] Fwd: SAW-2019-01488 Request for Additional Information, (Academy Pointe), Johnston
County, NC (UNCLASSIFIED)

Ross
3

Please see below the forwarded information you requested on SAW-2019-01488 Request for Additional
Information, (Academy Pointe), Johnston County, NC . Please don't hesitate to contact me if you have any
questions.
thanks
Wyatt
---------- Forwarded message ---------
From: Eva King <[e-mail]>
Date: Fri, Nov 8, 2019 at 8:17 AM
Subject: RE: SAW-2019-01488 Request for Additional Information, (Academy Pointe), Johnston County, NC
(UNCLASSIFIED)
To: wyatt brown <[e-mail]>
Cc: Andrew Hodge <[e-mail]>, Donnie Adams <[e-mail]>

Wyatt,
Please see below for our responses in red. Please let me know if you need anything else.

Eva King, PE
Adams & Hodge Engineering, PC
314 E. Main Street
Clayton, NC 27520
(M) 980-253-5773
Firm # C-4187

Begin forwarded message:
From: "Sullivan, Roscoe L III CIV (US)" <[e-mail]>
Date: October 25, 2019 at 8:54:32 AM EDT
To: wyatt brown <[e-mail]>, "[e-mail]" <[e-mail]>
Cc: "Goss, Stephanie" <[e-mail]>, "Williams, Andrew E CIV USARMY
CESAW (USA)" <[e-mail]>
Subject: SAW-2019-01488 Request for Additional Information, (Academy Pointe),
Johnston County, NC (UNCLASSIFIED)
4

CLASSIFICATION: UNCLASSIFIED

Hey Wyatt,

Thank you for the Pre-Construction Notification (PCN) and attached information, dated and
received 9/26/2019, for the above referenced project. I have reviewed the information and need
clarification before proceeding with verifying the use of Nationwide Permit (NWP) 29. Please
submit the requested information below (via e-mail is fine) within 30 days of receipt of this
Notification, otherwise we may deny verification of the use of the NWP or consider your
application withdrawn and close the file:

1. As indicated by the Corps during the 6/26/2019 site visit, the NWP 29 2017 Regional
Condition 4.1.1 prohibits "\[d\]ischarges in perennial streams, intermittent streams and wetlands
for stormwater management facilities." However, with sufficient justification it may be possible
to permit impacts to streams/wetlands for stormwater management facilities under a NWP 18 for
Minor Discharges. Please provide a more detailed explanation for how the proposed stormwater
wetland design has avoided and minimized impacts to waters to the maximum extent practicable.
This should include an explanation for the size and location of the proposed SCM and why
stormwater could not be treated at other locations within the project area. Note that the Corps
discourages the use of existing creeks, streams, lakes and wetlands to remove pollutants from
storm water runoff (in-stream treatment). Please review the attached EPA Region 4 guidance on
the subject of in-stream treatment.

This site is an urban infill project and has many challenges that complicate the site design. It is
nestled between three roads (northeast to southwest) and a perennial stream that almost
completely divides the northern portion of the property. The existing topography offered another
set of challenges. The overall site layout is designed such that perennial stream impacts are
avoided, and intermittent stream impacts are minimized to the maximum extent practical. The
street network and associated utilities systems are designed to avoid perennial stream and
intermittent stream impacts. However, there are proposed impacts to the intermittent stream on
the eastern portion of the site. This proposed intermittent stream impact is for a portion of the
embankment of the proposed wet pond (mislabeled as stormwater wetlands on original
submittal) with a greenway trail along the dam. (Please note: No existing creeks, stream, lakes
or wetlands will be used to remove pollutants form stormwater runoff.) We considered other
locations for stormwater control measures; however, topographic constraints as well as existing
adjacent development patterns made alternative locations impractical. The proposed wet pond is
located at the most practical low point on the site and is sized to meet the Town of Clayton,
Johnston County and North Carolina stormwater quantity and quality requirements. The wet
pond is designed to follow existing contours as much as possible, curving to minimize
intermittent stream impacts to the maximum extent practical. The proposed 120lf impact is
mainly from the inside top of dam to existing condition tie-in points of the slope, outside the
pond. Alternative designs were considered but required extensive retaining walls reaching
heights up to 20’ near the property line adjacent to the existing Cooper Academy school site
rendering those designs unsafe and not practical. It should also be noted that the majority of the
drainage area currently feeding this intermittent stream is the aforementioned adjacent Cooper
Academy elementary school site. The contributing portion of the school site is more than 50%
impervious. Currently the runoff from this portion of the school site enters the stream via
overland flow without receiving any stormwater treatment (quantity nor quality). The proposed
wet pond design will allow this runoff to be captured and treated (quantity and quality) before
5

being released back into the intermittent stream, providing opportunity for debris, suspended
solids, nutrients, etc. to be captured and filtered out. The wet pond will also reduce the existing
peak flow for the 1yr, 2yr, 5yr and 10yr storm events. Given all the above information it is our
opinion that the proposed

2. Provide detailed plans for the proposed stormwater wetland. These should include
construction drawings, proposed final conditions, details on outlet structure/pipe (length,
dimensions, material), etc. Additionally, will there be any outlet protection proposed for the
stormwater wetland's outlet? If not, how do you propose to minimize downstream impacts to
aquatic resources during large storm events?
Please see attached sheet C5.04 for SCM details as well as the pond routing calculations
provided. As can be seen from the routing calculations, even the 100-year storm is
expected to leave the proposed wet pond via the outlet structure, which discharges into an
appropriately sized riprap pad to allow the water energy to dissipate before entering the
stream. Also, since the proposed pond treats water that is currently entering the stream
untreated (above mentioned runoff from Cooper Academy and neighboring impervious
areas) the treatment of this water should improve the aquatic resources compared to
existing conditions.

3. Provide plans to show how the proposed lots will be serviced by utilities (sanitary/sewer,
septic, water, gas, electric, etc.). Will any of the necessary utilities impact any potential
jurisdictional waters?

There are no additional impacts necessary/proposed to provide utility service for all lots in the
project. Please see attached sheets C3.01 for an overall utility layout.

4. Provide grading and erosion control plans for the total project.
Please see attached sheets C4.07 and 5.01 for Erosion Control and Grading plans.

Please feel free to contact me with any questions or concerns.

Sincerely,

Ross

Ross Sullivan, PWS, ISA Certified Arborist
Regulatory Specialist
Raleigh Regulatory Field Office
U.S. Army Corps of Engineers - Wilmington District
3331 Heritage Trade Drive, Suite 105
Wake Forest, North Carolina 27587
Office #: 919-554-4884. Ext. 25
Email: [e-mail]

6

We would appreciate your feedback on how we are performing our duties. Our automated
Customer Service Survey is located at:
BlockedBlockedhttps://cops.usace.army.mil/sites/RD/ORM2_Blog/_layouts/15/WopiFrame.aspx
?sourcedoc={AE95B1BE-995E-4A7E-9968-
B619432F7CEB}&file=National_Customer_Survey_for_Dec_2018.xlsx&action=default

CLASSIFICATION: UNCLASSIFIED

--
Wyatt Brown, LSS, CPESC
Brown's Environmental Group, Inc
919-524-5956
CLASSIFICATION: UNCLASSIFIED
CLASSIFICATION: UNCLASSIFIED
7

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9 919-243-1332
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FIRM # C-4187
CONTENT IN ACCORDANCE WITH ASTM D698. THE CONTRACTOR SHALL TAKE PHOTOGRAPHS OF THE OUTLET STRUCTURE AT ALL PHASES OF
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2
A

2
8
D
EMERGENCY SPILLWAY
7
GRAPHIC SCALE
0
N
0
97
A

2
E
G
2
A
40204080160
7 N
0
I
8 A
R
4
7
D
2
2
2
5
C
7
I
2
7
7
L
5
B
9
U
5
P
8
2
2
8
5
2
0
0
8
( IN FEET )
8
2
8
2
5
40
1 inch = ft.
REVISED
11/27/2019 12:20 PM
R
E
R
U
VALVE STEM AND WHEEL
T
C
MOUNTED ON SIDE OF
PHASES 3 & 4
A
F
MANHOLE
U
N
TOP OF RISER 'L'
A
M

R
E
ACADEMY POINTE
P
BERM
(TYP.)
TOWN OF CLAYTON, JOHNSTON COUNTY, NORTH CAROLINA
'M' PVC SCREW TYPE PLUG
NOT TO SCALE
'M' PVC TEE
INV = 'O'
PERMANENT POOL
ABLE
LOCK
56"
ELEVATION
'M' DIA. PVC
H
CESS HATC
AC
STUBBED INTO BOX
')
(2'x4
CATION
PICAL LO
TY
LAR
PENDICU
SING PER
ES CROS
PIP
ETING
IPES ME
'M' PVC CAP WITH 'N'OF P
•••••
••••••••••••
••••••••••
L••••••••
SS STEE•••••
STAINLE
LATE
ORIFICE DRILLEDBASE P
E
INUM PIP
O.D.) ALUM
H
BLE CATC
CA
'Q' (INTER
IOR)
N
NSTRUCTIO
CO
PRECAST
18"
CONCRETE BOX
56"
H
E TRAS
SECUR
(2) 12'X6' 3000 PSI CONC. W/ REBAR
5x5 CONCRETE
CONCRETE
RACK
ANTI-SEEP COLLARS (MIN. 18"
BOX
" SS
TH 1/2"X4
BOX WI
BEYOND OUTER DIA. OF STORM
3" x1/4" C
HANNEL
SIDE VIEW
R
MANHOLE STEPS - (1) PE
ANCHOR
PIPE)
CL
OSURE
PLATE
IN.
SIDE M
ALUMINUM TRASH RACK MATERIALS AND WELDING
SPECIFICATIONS
PLAN VIEW
6" GATE VALVE
SCM DETAIL SHEET
ALUMINUM MATERIALS USED IN TRASH RACK FABRICATION:
M HINGE
ALUMINU
RICATED
PREFAB
6061-T6
HINGES
RAME (3)
LDED TO F
WE
GENERAL CHARACTERISTICS:
68"
VIDED
PRO
6061-T6 HEAVY DUTY STRUCTURAL CORROSION RESISTANCE
'S' RCP 'T' LF @ 'U'%
'P'(B) STRESS, CRACKING (B)
INV IN = 'V'
MIN
2:1
ALUMINUM MILL PRODUCT SPECIFICATIONS:
6
" DI
P D
RA
INA
GE
PIP
E @
1
%
INV OUT = 'W'
6061 PIPE MILITARY (MIL-P-25995) ASTM B241) ANSI (H38.7)
PERIMETER
3"x1/4"
8"
1
CONCRETE BALLAST
TYPICAL MECHANICAL PROPERTIES:
E
T PLAT
SUPPOR
TENSILE STRENGTH (ksi) 6061-T6 ULTIMATE (45) YIELD (40)
T TO TOP
CHOR BOL
AN
ULTIMATE SHEARING STRENGTH ksi (30)
CTURE
OF STRU
NGS
R OPENI
5.5" CLEA
5.5"X
TYPICAL MECHANICAL PROPERTIES OF TIG WELDED JOINT ON
ETE
5x5 CONCR
ALUMINUM ALLOYS:
X
BO
WELD DUCTILITY BASE METAL 6061 FILLER 5356 ULTIMATE
SIDE VIEW
STRENGTH (29,000#) YIELD STRENGTH (17,000 #)
NOTE: WELDING OF ALUMINUM HAS LITTLE, IF ANY, ROOT PENETRATION INTO BASE METAL. TO ACHIEVE PROPER JOINT ATTACHMENT
CUTOFF TRENCH (KEY)
BEVELING OF BASE METAL IS NECESSARY AND GENEROUS AMOUNT OF WELD ROD IS REQ'D. WE USE BOTH 4043 AND 5356 FILLER RODS TO
6" DEEP WASHED STONE
(SHALL EXTEND INTO SOILS
ACHIEVE THE BEST STRENGTH AND CORROSION RESISTANCE FOR THE APPLICATION. ALL PIPES THAT CROSS PERPENDICULAR TO ONE
SUITABLE FOR EMBANKMENT
ANOTHER ARE WELDED TOP AND BOTTOM WITH A 1/4" TO 3/8" WIDE FILLET. PIPES THAT MEET THE BASE PLATES ARE WELDED COMPLETELY
FOUNDATION)
AROUND WITH A 1/4" TO 3/8" WELD FILLET. ALL WELDS ARE DONE IN A MANNER TO ACHIEVE MAXIMUM STRENGTH AND IN AN EFFORT TO MINIMIZE
ANNEALING OF THE BASE METAL IN ORDER TO AVOID CRACKING.
NOT TO SCALE
C5.04
NOT TO SCALE

EROSION CONTROL SEQUENCE OF CONSTRUCTION
EROSION LEGEND:
-OUTLET PROTECTION
iiiiiiiiiiiFw-LIMITS OF DISTURBANCE
-SILT FENCE
-CONSTRUCTION ENTRANCE
220 -PROPOSED CONTOUR
-CHECK DAM
4maTD4mmTD4mm -TEMPORARY DIVERSION
-DITCH LINER - NAG C350 OR EQUAL
1 I -CONCRETE WASHOUT AREA
4mmPD4mmPD4mm -PERMANENT DIVERSION
*NOTE* ALL DITCHES LINED W/6"NAG S150
-SKIMMER BAFFLES
-WATTLE
UNLESS OTHERWISE NOTED.
-ARC INLET PROTECTION
� ^ -SILT FENCE OUTLET
' ' -EXISTING CONTOUR
-INLET PROTECTION
SOURCES OF INFORMATION:
1. EXISTING SURVEY OF SITE PROVIDED BY STOKES SURVEYING AND MAPPING PLLC, 1425-105B ROCK QUARRY
ROAD, RALEIGH NC 27610, DATED 11/27/2018.
2. EXISTING LIDAR CONTOURS OUTSIDE OF SITE FROM JOHNSTON COUNTY GIS DATED 2017.
3. PARCEL INFORMATION FROM JOHNSTON COUNTY GIS DATED 2018
4. EXISTING CONDITIONS FOR ACADEMY POINTE PROVIDED BY ADAMS & HODGE ENGINEERING, PC
CLAYTON, NC 27520 DATED 5/9/2019.
5. BUFFER CALL MADE BY THE STATE. SEE LETTER DATED OCTOBER 18, 2018.
FOR GRAPHIC PURPOSES SILT
FENCE AND LIMITS OF DISTURBANCE
ARE SHOWN SEPARATED. SILT FENCE
IS TO BE INSTALLED AT THE
ACTUAL LIMITS OF DISTURBANCE.
THIS SHEET IS FOR GRADING AND EROSION
CONTROL PURPOSES ONLY. DO NOT USE
THIS SHEET FOR STORMDRAIN
INSTALLATION.
JOHNSTON COUNTY AND TOWN OF
CLAYTON RESERVES THE RIGHT TO MODIFY
THE EROSION AND SEDIMENTATION
CONTROL PLAN IF THE EXISTING PLAN OR
ITS IMPLEMENTATION PROVE TO BE
INADEQUATE.
ALL DITCHES/SWALES ARE TO BE LINED
USING NAG S150 OR SOD UNLESS
OTHERWISE SPECIFIED.
1. OBTAIN GRADING PERMIT.
2. THIS PROJECT IS DIVIDED INTO THREE (3) STAGES. STAGE 1 EROSION CONTROL - CLEARING & GRUBBING SITE. STAGE 2 EROSION CONTROL - SITE GRADING AND CONSTRUCTION
WHILE PROTECTING ONSITE WETLANDS, STAGE 3 - FINAL GRADING AND CONSTRUCTION (INCLUDING PHASE 2 CONSTRUCTION TO BE PERMITTED AT A LATER DATE)
g19 BEFORE BEGINNING ANY LAND DISTURBING ACTIVITY THE CONTRACTOR SHALL CONTACT JOHNSTON COUNTY UTILITIES, (919-938-4717) TO SET UP A PRE -CONSTRUCTION MEETING.
BEGIN STAGE 1 EROSION CONTROL
4. INSTALL TEMPORARY GRAVEL CONSTRUCTION ENTRANCES
5. INSTALL ALL SILT FENCING AND WIRE & WASHED STONE OUTLETS IN SILT FENCE AS SHOWN ON THE APPROVED PLAN. CLEAR ONLY AS NECESSARY TO INSTALL THESE DEVICES.
6. BUILD SEDIMENT BASIN # 1 AND #2 AS SHOWN TO BE USED DURING CONSTRUCTION. CUT FROM ROUGH GRADING OF DIPLOMA DRIVE AND TEMPORARY DIVERSION CONSTRUCTION
SHALL BE USED TO FILL THE SIDES OF BASIN #2 AS NEEDED.
7. CLEAR AND INSTALL TEMPORARY DIVERSION DITCHES SHOWN ON STAGE 1 EROSION CONTROL PLANS DISTURBING THE SMALLEST AREA POSSIBLE.
8. EROSION CONTROL MEASURES SHOWN ON PLANS ARE MINIMUM AND MIGHT NOT BE SUFFICIENT TO CONTROL EROSION AND SEDIMENTATION. CONTRACTOR TO INSTALL
ADDITIONAL MEASURES AS GRADING CONDITIONS CHANGE TO ROUTE STORMWATER TOWARDS BASIN AND INLETS. CONTACT ENGINEER AS NEEDED FOR FURTHER DESIGN AND
INSTRUCTION.
9. GROUNDCOVER MUST BE APPLIED TO DISTURBED AREAS ACCORDING TO THE "GROUND STABILIZATION" TABLE ON SHEET 131.03 (PER THE NEW STORMWATER RULES). STABILIZE
TE AS AREAS ARE BROUGHT UP TO GRADE WITH VEGETATION, PAVING, DITCH LININGS, ETC.
10. CALL JOHNSTON COUNTY UTILITIES FOR ON SITE INSPECTION AND CERTIFICATE OF COMPLIANCE. (SEE NOTE 3.)
BEGIN STAGE 2 EROSION CONTROL ON EAST SIDE OF ROSEMARY STREET.
11. INSTALL STORM PIPES ST-73 AND ST-74 PER CONSTRUCTION PLANS. CONTRACTOR SHALL VERIFY THE TEMPORARY DIVERSION FEEDS INTO THE SEDIMENT BASIN THROUGH THE
NEWLY INSTALLED STORM PIPES.
12. INSTALL STORM PIPES ST-52, ST-54, ST-55, ST-58 THROUGH ST-66, AND ST-71 THROUGH ST-72 ALONG WITH ASSOCIATED BOXES AND INLET PROTECTION.
13. INSTALL STORM PIPES ST-33 THROUGH ST-35, ST-50 AND ST-51 ALONG WITH ASSOCIATED BOXES AND INLET PROTECTION.
14. CALL JOHNSTON COUNTY UTILITIES FOR ON SITE INSPECTION AND CERTIFICATE OF COMPLIANCE. (SEE NOTE 3.)
BEGIN STAGE 2 EROSION CONTROL ON WEST SIDE OF ROSEMARY STREET.
15. BEGIN TO CLEAR AND GRUB SITE. DURING THE INITIAL CLEARING AND ROUGH GRADING STAGE, ENSURE THAT STORMWATER IS ROUTED TO EXISTING BASINS UNTIL THE PROPOSED
DRAINAGE PATTERNS ARE ESTABLISHED. MAINTAIN DEVICES AS NEEDED.
16. INSTALL TEMPORARY DIVERSION DITCHES WEST OF ROSEMARY STREET AS SHOWN ON PLANS FOR STAGE 2 TO DRAIN TO CB-33 AND CB-35.
17. ONCE STORMWATER CONVEYANCE SYSTEM HAS BEEN INSTALLED FOLLOWING STEPS 11, 12, AND 13 AS NOTED ABOVE CARRYING STORMWATER TO BASIN #2, BASIN #1 MAYBE
REMOVED AS APPROVED BY ENGINEER AND JOHNSTON COUNTY UTILITIES.
MAKE SURE WETLANDS ARE PROTECTED UNTIL APPROPRIATE 4011404 PERMITS HAVE BEEN RECEIVED AND JOHNSTON COUNTY UTILITIES HAVE APPROVED STAGE 3
i - 11r- I 111 11 IF////, A ff, A A A frAllw1l.,
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ham
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r EXISTING
CONTOURS
am _Mw
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REVISED
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ILE
1
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CONSTRUCTION
ENTRANCE
(TY P. )
SEE SHEET C4.06
DISTURBED AREA = 24-59 AC
STAGE 3 EROSION
H �
0 C/)
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GRAPHIC SCALE
( IN FEET)
1 inch = 50 ft.
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DESIGN
DCA/PCE/EK
DRAWN
ADS/EK
CHECKED
DCA
HORIZONTAL SCALE
SEE GRAPHIC SCALE
VERTICAL SCALE
NIA
DATE
05/09/2019
JOB NO.
SHEET
C4.09