HomeMy WebLinkAbout20200755 Ver 1_401 Application_20200609corblu
ECOLOGY GROUP
June 8, 2020
NC DWR, 401 & Buffer Permitting Branch
512 North Salisbury Street
Raleigh, NC 27604
Subject: Section 401 Water Quality Pre -Construction Notification
Colonial Pipeline Company Maintenance
Johnston County, North Carolina
Corblu Project No. 02-041901- Exposure Lines 23s and 24s
To whom it may concern:
On behalf of our client, Colonial Pipeline Company's (CPC), Corblu Ecology Group, LLC (Corblu) is
pleased to submit this Section 401 water quality Pre -Construction Notification (PCN) for the
required exposed pipeline preventative maintenance action within a perennial stream for CPC's
Line 24s and Line 23s. The pipeline exposure is located within CPC's existing right-of-way (ROW)
east of the Jack Road and Government Road intersection in Johnston County, North Carolina
[(35.596078,-78.498691) and (35.596053,-78498706); Figure 1]. Based on our evaluation of the
subject site, we believe that the temporary and permanent disturbances to waters of the U.S.
associated with this maintenance activity are authorized by the U.S. Army Corps of Engineers
(USACE) under a combination of Nationwide Permit (NWP) Nos. 3 (a) and (c) — Maintenance. This
NWP does not require notification of the USACE prior to initiation of the preventative maintenance
activity as there will be no loss of streambed; however, it has been determined that total temporary
disturbance to the streambed exceeds 40 linear feet which requires 401 Water Quality Certification
from the North Carolina Department of Environmental Quality (DEQ) prior to the initiation of work.
Background
Recent high flow events from significant precipitation have resulted in significant s
bank erosion within an unnamed perennial stream In UHU's KUW, exposln.
Line 24s (Photograph Nos. 1 and 2). The exposure and lack of surface pipe
project location has resulted in conditions that leave the pipeline vulnerable
3225 South Cherokee Lane, Bldi,
Section 401 Water Quality Pre -Construction Notification
Colonial Pipeline Company — Line 24s Exposure
June 8, 2020
Corblu Project No. 02-041901 —Johnston Co. NC
Further, these conditions are not consistent with CPC's pipeline integrity program or U.S.
Department of Transportation regulatory requirements for pipeline protection.
Proposed Activities in Jurisdictional Waters
The proposed pipeline maintenance activity will include permanent and temporary impacts to an
unnamed perennial stream totaling 65 linear feet [approximately 52 linear feet (pre -cast revetment
mats and rip rap), 3 feet of excavating and backfilling, and 10 linear feet (temporary dam and
pump)], respectively. Specifically, CPC proposes to permanently place approximately 42 linear feet
of pre -cast Submar matting, and 10 linear feet of rip rap (totaling 52 linear feet) in the unnamed
stream which will provide the required protective cover over Line 23s and Line 24s. As mentioned
above, temporary disturbances to the unnamed perennial stream will include approximately 10
linear feet of temporary workspace (dam and pump) to conduct maintenance activities "in -the -dry"
and approximately 3 additional linear feet to "key" in the top of the matting system by temporarily
excavating and backfilling the streambed.
The proposed maintenance location will be accessed through CPC's existing, mowed, and
maintained ROW from Government Road (Figure 3). CPC intends to inspect the exposed pipeline
and replace the required protective cover over the pipeline as described above. To re-establish the
protective cover CPC intends to conduct the following: 1) excavate the pipeline at the exposure on
Line 23s and Line 24s; 2) inspect and make repairs to Line 23s and 24s as necessary; 3) backfill
the excavation area; and 4) restore the stream to pre -erosional contours and elevations over Line
23s and Line 24s by returned excavated material and key pre -cast revetment mats into the stream
bed and bank in a manner that maintains stream grade and flow conditions (Appendix A).
To minimize sedimentation to the unnamed perennial stream during the above -mentioned
maintenance activity, dams constructed of sand bags, steel plates, or water -inflatable plastic dams
will be temporarily placed upstream of the maintenance area. The stream flow will be pumped
around the maintenance area, discharging immediately downstream via an energy dissipater to
prevent stream scour. The pump used will be sufficiently sized to accommodate the anticipated
stream flow (Appendix B). The temporarily excavated soils will be stored within the adjacent upland
area and returned to the excavated trench, and approximate pre-existing contours will be restored
following completion of the maintenance activity
Rip rap placed on an erosion control blanket (geotextile fabric) will be used to stabilize the Submar
mats in the stream bed on the downstream side of the maintenance area where the finished top
KI
Section 401 Water Quality Pre -Construction Notification
Colonial Pipeline Company — Line 24s Exposure
June 8, 2020
Corblu Project No. 02-041901 —Johnston Co. NC
elevation of the rip -rap does not exceed that of the original stream bed elevation. Once the
required minimal protective pipeline cover (pre -cast revetment mats) are keyed into the streambed
at existing grade, the temporary dams will be removed, and normal streamflow will be restored.
CPC's standard erosion control practices will be employed (Appendix C). Specifically, the disturbed
areas along the stream bank will be revegetated with a grass seed mix and stabilized with straw
and silt fence.
Corblu respectfully requests 401 Water Quality Certification for the required preventative pipeline
maintenance and the unavoidable impacts to 65 linear feet of perennial stream (42 linear feet of
Submar matting, 3 linear feet of excavating and backfilling to "key" in the mat, 10 linear feet of rip
rap and 10 linear feet of temporary workspace) within CPC's existing, mowed, and maintained
ROW (Appendix A). The appropriate figures and photographs are enclosed for your review.
401 & Buffer Permitting PCN Submittal Checklist
We have provided the following information to document compliance with the requirements
outlined in the PCN Submittal Checklist (Appendix D). Each item is discussed below.
Application Fee
A $240.00 check made out to "N.C. Division of Water Resources" for 401 Water Quality
Certification with minor impacts has been included with this submittal.
PCN Application
A complete copy of the USACE Wilmington District PCN Application and supporting documentation
have been included with this submittal (Appendix E).
Stormwater Management Plan
Not Applicable - This is a maintenance activity for an existing petroleum pipeline and does not
involve the construction of any roads or structures.
If your project is located within a State implemented Riparian Buffer Rule Area, submit the
following along with site plans and PCN form: Three (3) copies of the details for on -site diffuse flow
provisions
Not Applicable. The proposed required maintenance activity is located within the Neuse River
Basin, the rule does not apply as uses are existing and ongoing [15A NCAC 02B.0233 (3)(b)(i)]
(Exemption when uses are present and ongoing).
DWR Stream Determination Forms for streams on property and DWR determination letter for
wetlands or streams (if applicable)
K?
Section 401 Water Quality Pre -Construction Notification
Colonial Pipeline Company — Line 24s Exposure
June 8, 2020
Corblu Project No. 02-041901 — Johnston Co. NC
Not Applicable — The referenced forms are for buffer determinations. The proposed required
maintenance activity is exempt (see above).
Maps and Plans
• The most recent version of the 1:24,000 USGS Topographic Map:
See Figure 1.
• The most recent version of the bound and published County NRCS Soil Survey Map -
(required for projects within the Neuse River Basin, Tar -Pamlico River Basin, Randleman
Lake Watershed and the Catawba River Basin, also recommended for all projects):
See Figures 2A and 2B.
• Vicinity map:
See Figure 3.
• The Site Plan:
See Appendix A.
• Pre-construction/Pre-existing conditions:
See Appendix A.
• Proposed conditions:
See Appendix A.
• Drainage Plans:
Not Applicable.
• Proposed Impacts:
See Appendix A.
• Wetland Impacts:
Not Applicable.
• Stream Impacts:
See Appendix A.
4
Section 401 Water Quality Pre -Construction Notification
Colonial Pipeline Company — Line 24s Exposure
June 8, 2020
Corblu Project No. 02-041901 — Johnston Co. NC
Summary and Conclusion
In summary, the pipeline maintenance activity will result in unavoidable permanent and temporary
impacts to approximately 65 linear feet (52 linear feet permanent and 13 linear feet temporary
impacts) of the unnamed perennial stream as authorized under the USACE NWP Nos. 3(a) and
(c). The project was designed to avoid and minimize stream impacts to the maximum extent
practicable and represents the least environmentally damaging, practicable alternative that
satisfies the project purpose.
Based on this submittal, we respectfully request written authorization of Section 401 Water Quality
Certification. If you have any questions or comments regarding this PCN submittal, please contact
the undersigned at (770) 591-9990.
Sincerely,
CORBLU ECOLOGY GROUP, LLC
1 6
Trey YC.r:iickeft, CAE
Staff Ecologist
Shanna E. Cahill, CE
Principal
Enclosures: Figure 1 — Site Location Map
Figure 2A — USDA NRCS Soils Map
Figure 2B — USDA Soils Map
Figure 3 — Vicinity Map
Figure 4 — Jurisdictional Features
Photographs (2)
Appendix A: Detailed Site Plans
Appendix B: Typical Dam and Pump Maintenance Dig
Appendix C: CPC Soil Erosion and Sediment Control Plan
Appendix D: 401 & Buffer Permitting PCN Submittal Checklist
Appendix E: USACE Wilmington District PCN Form
c: Ms. Jennifer Price, CPC Project Manager, via email
Mr. John Wyatt, CPC Environmental Lead-SED, via email
Mr. Faron Leigh, CPC Environmental Specialist, via email
5
l�
Jack Road
John
�f
Government Road
r •�
M j l f
Base Map Source: USA Topo Maps
Colonial Pipeline Company, SE
Lines 23s and 24S Exposure
Johnston County, North Carolina
-%1
Line 23s Exposure Location
(35.596078,-78.498691)
Line 24s Exposure Location f .. - •
(35.596053,-78498706)
ft• is
•. -
�•`48
r ;C=
• � t
�• Legend
CPC Pipeline
S ( Exposures
1:12,000
corblu
ECOLOGY GROUP
0 600 1,200 2,400 Feet
Figure 1
Site Location
Project No. 02-041901
h
..
fikiw
AX
7-0
Line 23S
. '.• Exposure•
Line 24s
4 ..
1..� Exposure Location
Legend
Exposures
MUSYM
Bb - Bibb sandy loam, 0 to 2 percent slopes, frequently flooded
CaB - Cecil Loam, 2 to 6 percent slopes
Perennial Streem
Prject Are.
f ,�4�,�• ..
Base Map Source: ESRI Aerial Imagery 0 125 250 500 Feet
GPS Data Collected: 3/31/2020 1 :2,500
Colonial Pipeline Company, SE CIA Figure 3
Lines 23s and 24s Exposure r'"Vicinity Map
Johnston Count North Carolina o 1 b I u Project No. 02-041901
y' ECOLOGY GROUP
Base Map Source: ESRI Aerial Imagery 0 50 100 200 Feet
GPS Data Collected: 3/31/2020 1 :1'000
Colonial Pipeline Company, SE
Lines 23s and 24s Exposure
Johnston County, North Carolina
orbl
ECOLOGY GROJP
Figure 4
Jurisdictional Features
Project No. 02-041901
Section 401 Water Quality Pre -Construction Notification Photos taken on 3/31/2020
Colonial Pipeline Company — Line 23s and 24s Exposure Corblu Project No. 02-041901- Johnston Co. NC
APPENDIX A
DETAILED SITE PLANS
1 LMI\
COLONIAL PIPELINE
/ 16" 22 PIPELINE—'-,,"
COLONIAL PIPELIN
JAL PURPOSES
8 23 PIPELINE
'HE GROUND ON FORM TO THE
3Y THE STATE
:ERS AND
;IFIC AND BASED
UTILITIES
L PIPELINE
HALL BE /
/
NN IS
PROVIDED BY
kL PURPOSES
(O.H.W.M.) WAS
/
_ as
/ \
- T.O. P.=+230.10'
PIPELINE COLONIAL PIPELINE
PELINE 8" 24 PIPELINE
RIGHT OF WAY
EXPOSURE L=3.5' /
:CTION CP2 T.O.P.=+230.23' /
ELEVATION (Z)
+243.95' COV.=24" /
/
+235.33' /
+235.15'
78.49880' �j // //
OR DEMOLITION,
APPROVAL MUST
ANAGER AND
R THAN 1.5:1
XAMINED AND
DER THE GRADING
LLED BY
TAINED ON THE
%INTAINED DAILY
I AS A RESULT
CLEANING IS TO
THE OWNER. I
TRACTORS,
'LIERS THAT
;TORM DRAIN
JCTION SITE IN
PATED STORM
JTANTS OFF THE
)E BUT ARE NOT
CAL SPILLS;
-ANTS, GLUES,
)D
ESTOS FIBERS,
TS; FUELS, OILS,
rOR OR BATTERY
IENT WASH
!; CONCRETE,
WASTES FROM
&NING OR
CHLORINATED
RING
ISPOSE OF SUCH
4TROLLED
ILLY SEPARATED
IOFF, WITH
WITH LOCAL,
)JECT AS
S. ANY CHANGES
ECT MANAGER,
IENTED IN THE
IDELINE
RIGHT OF WAY
:CTION
78.498800
COLONIAL PIPELINE
16" 22 PIPELINE-",,,.
COLONIAL PIPELIN
8" 23 PIPELINE
COLONIAL PIPELINE
8" 24 PIPELINE
233
CLES SHALL BE
'REE OF
ERE SHOULD BE
VY EQUIPMENT
LD HAVE
CONTROLS SHALL
SEQUENT
PROJECT AREA.
:RIALS SHALL BE
GNATED
ING FOR ULTIMATE
Y OF THE
H APPROVED
2EAS. IF A RAIN
4CE SHALL BE
SOIL AND THE
KCESS OR
JMPS OR OTHER
EMOVED AND
PER LOCAL,
BREAM FLOW
:ILITATE
AP OR JERSEY
.T LADEN WATER
)IRECTLY OR
;TOCKPILE OR
4S SHALL BE
THEIR
:LUDING GRADE
ATTEMPT TO
NT CONTROL,
PION LOGISTICS,
RISE THAT
EASURES TO
lAN STREAM
NSTALLATION.
:NT AND
RE THAT THE
DANCE WITH THE
PELINE
RIGHT OF WAY
:CTION
78.49880'
SUBMAR MAT SYSTEM
8'x20' (7 TOTAL)
BACKFILL
EXCAVATED 3'--
DEEP TRENCH WITH
EXISTING MATERIAL
L+_
FLOW
i 1 9C
0
/ COLONIAL PIPELINE
16" 22 PIPELINE y
w4WNFAW�,' MIN
fal�
ki
/ COLONIAL PIPELIN
8" 23 PIPELINE
COLONIAL PIPELINE
8" 24 PIPELINE
SEED & PLACE EROSION
CONTROL BLANKET OVER
ALL DISTURBED AREAS
(2,301 FT2 TOTAL)
M
3'DEEPx10'LONG
ROCK SUBGRADE
(12" DIA.)
BANK PAVING
(12" DIA.)
BACKFILL EXCAVATED 2'
DEEP TRENCH WITH
EXISTING MATERIAL (TYP.)
...... ... _ SUBMAR MAT SYSTEM
8'x20' (7 TOTAL)
BACKFILL EXCAVATED
_ 3' DEEP TRENCH WITH
EXISTING MATERIAL
PROPOSED
GRADE
- -- COLONIAL PIPELINE ---- ---COLONIAL PIPELINE
...............-.
16" 22 PIPELINE 8" 23 PIPELINE
i
- f
20
IE
WATER MARK
78.49880'
MEMNEMM"
i
0+00
3'DEEPx10'LONG
ROCK SUBGRADE
(12" DIA.)
COLONIAL PIPELINE
8" 24 PIPELINE
EXISTING
GRADE
250
240
230
220
+ 210
0+80
_INE
ILL
UT
GH WATER MARK
78.49880°
230 ----- __ - -_-__ 230
-- - - �-- - - - - - - -- _ -- - _ -
I
PROPOSED COLONIAL PIPELINE
GRADE 16" 22 PIPELINE
220 220
-30 -20 -10 0 10 20 30
1
C401
240--BACKFILL EXCAVATED 240
2' DEEP TRENCH WITH SUBMAR MAT SYSTEM EXISTING
EXISTING MATERIAL 8'x2O' (7 TOTAL) GRADE
L
230 230
PROPOSED
GRADE COLONIAL PIPELINE
8" 23 PIPELINE
220 1 1
I i 220
-30 -20 -10 0 10 20 30
2
C401
240
230
220 +
-30
BACKFILL EXCAVATED SUBMAR MAT SYSTEM EXISTING
3' DEEP TRENCH WITH 8'x20' (7 TOTAL) r GRADE
EXISTING MATERIAL /(
PROPOSED
I GRADE
I
COLONIAL PIPELINE
8" 24 PIPELINE
-20
-10
0
10
20
/--Z-\
240
230
+ 220
30
ACCESS PLAN
SCALE: 1" = 250'
PELINE
RIGHT OF WAY
:CTION
78.49880°
i
i
COLONIAL PIPELINE
8" 24 PIPELINE
COLONIAL PIPELINE
8" 23 PIPELINE
COLONIAL PIPELINE
16" 22 PIPELINE
/I
INDIVIDUAL ELEMENT
3.75" -� �- 3.75"
2.25"
UNDS (APPROX.)
NOTE:
C., 4,000 PSI
1. EXACT PLACEMENT OF MATS AND/OR ANCHORS
IZED
WILL BE DETERMINED IN THE FIELD.
.R ROPE,
2. MATS ARE PLACED ON A GEOTEXTILE FABRIC
1 9,500 POUNDS
AS SHOWN IN DETAIL.
SUBMAR MAT SYSTEM
SCALE: N.T.S.
3EOTEXTILE PLAN LAYOUT
KALE: N.T.S.
GEOTEXTILE UNDERNEATH
SUBMAR MAT SYSTEM
EXISTING
GRADE
IIIII III-
(
PROPOSED
GRADE
BACKFILL EXCAVATED
GEOTEXTILE UNDERNEATH
3' DEEP TRENCH WITH
SUBMAR MAT SYSTEM TO BE
COMPACTED MATERIAL
PLACED 1' BEYOND MAT SYSTEM
UPSTREAM ANCHOR TRENCH DETAIL
SCALE: N.T.S.
SUBMAR MAT COMPACTED MATERIAL
SYSTEM
PROPOSED
GRADE
GEOTEXTILE UNDERNEATH
SUBMAR MAT SYSTEM TO BE
PLACED 1' BEYOND MAT
FLANK TRENCH DE
SCALE: N.T.S.
SUBMAR MAT
SYSTEM
ROCK TO BE PLACED AT
LEAST 3 ELEMENTS IN AND
EXISTING
A MINIMUM OF 10' OUT
r GRADE
PROPOSED 3'
GRADE
I I
GEOTEXTILE UNDERNEATH
SUBMAR MAT SYSTEM
ROCK SUBGRADE ROCK GRADE CONTROL DETAIL
SCALE: N.T.S.
8' x 20' x S. WORM DRNE CONNECTORS
4.5" MATS
MAT 1 MAT 2 SS. WORM DRIVE 8
I� CURRENT CONNECTORS 4'
I FLOW
XIL -
MAT 1
ROPE TUCKED
UNDER
PLAN VIEW SIDE VIEW
NOTE:
316 STAINLESS STEEL 2,200 LB. BREAKING STRENGTH IN THE LINE
CONFIGURATION ABOVE. 5/16" NUT DRIVER NEEDED
SEDIMENT
SANDBAG DAM
DISCHARGE PIPE
NERGY DISSIPATOR
(PUMPS SHOULD DISCHARGE
ONTO A STABLE VELOCITY
WORK AREA LENGTH
NOT TO EXCEED THAT WHICH CAN BE
DISSIPATOR MADE OF RIPRAP
COMPLETED IN ONE DAY
OR SANDBAGS)
SANDBAG DAM
CROSS SECTION
DEWATERING DETAIL
SCALE: N.T.S.
oeaaaad<'pea'a�< S$°e� °
°aa°aeae °aaaea �do�°e$aepa0
STRAP
e $��ae a awe � _
.'t . ., � •, °
'G ,.`'t ` °>°e°
FLOW$ °e$` •t,
— ,FlLTER'BAG `' go
a"a o$a'ea°$� V:•
—�►
•. 12" MIN.
$� a
_ aa�
a aa��$aa�e�a
PUMP DISCHARGE
HOSE
12" MIN.
PLAN VIEW
MULCH, LEAF / WOOD COMPOST,
STRAP
WOODCHIPS, SAND OR STRAW
BALES
FLOW
SLOPE
;
5% MAX.
i • •
e
LLEVATION
FILTER BAG L g" MIN.
FILTER BAG CONSTRUCTION SPECIFICATIONS
1. TIGHTLY SEAL SLEEVE AROUND THE PUMP DISCHARGE HOSE WITH A STRAP OR SIMILAR DEVICE.
2. PLACE FILTER BAG ON SUITABLE BASE (E.G., MULCH, LEAF/WOOD COMPOST, WOOD CHIPS, SAND OR
STRAW BALES) LOCATED ON A LEVEL OR 5% MAX. SLOPING SURFACE. DISCHARGE TO A STABILIZED AREA.
EXTEND BASE A MIN. OF 12" FROM EDGES OF BAG.
3. CONTROL PUMPING RATE TO PREVENT EXCESSIVE PRESSURE WITHIN THE FILTER BAG IN ACCORDANCE
WITH THE MANUFACTURING RECOMMENDATIONS. AS THE BAG FILLS WITH SEDIMENT, REDUCE PUMPING
RATE.
4. REMOVE & PROPERLY DISPOSE OF FILTER BAG UPON COMPLETION OF PUMPING OPERATIONS OR AFTER
BAG HAS REACHED CAPACITY, WHICHEVER OCCURS FIRST. SPREAD THE DEWATERED SEDIMENT FROM THE
BAG IN AN APPROVED UPLAND AREA AND STABILIZE WITH SEED AND MULCH BY THE END OF THE WORK
DAY, RESTORE THE SURFACE AREA BENEATH THE BAG TO ORIGINAL CONDITION UPON REMOVAL OF THE
DEVICE.
5. USE NONWOVEN GEOTEXTILE WITH DOUBLE STITCHED SEAMS USING HIGH STRENGTH THREAD. SIZE SLEEVE
TO ACCOMMODATE A MAX. 4" DIA. PUMP DISCHARGE HOSE. THE BAG MUST BE MANUFACTURED FROM A
NONWOVEN GEOTEXTILE THAT MEETS OR EXCEEDS MIN. AVERAGE ROLL VALUES (MARV) FOR THE
FOLLOWING: GRAB TENSILE 250 LB ASTM
D-4632
PUNCTURE 150 LB ASTM D-4833
FLOW RATE 70 GAL/MIN/FT' ASTM D-4491
PERMITTIVITY (SEC—') 1.2 SEC, ASTM D-4491
UV RESISTANCE 70% STRENGTH ® 500 HOURS ASTM D-4355
APPARENT OPENING SIZE (ADS) 0.15 — 0.18 MM ASTM D-4751
SEAM STRENGTH 90% ASTM D-4632
6. REPLACE FILTER BAG IF BAG CLOGS OR HAS RIPS, TEARS OR PUNCTURES. DURING OPERATION KEEP
CONNECTION BETWEEN PUMP HOSE AND FILTER BAG WATER TIGHT. REPLACE BEDDING IF IT BECOMES
(It COI Alln
FENCE F
WOVEN SLIT FILM
MIN. ABOV
GEOTEXTILE
UNDISTURE
FLOW—
GROUND
EMBED GEOTEXTILE
MIN. OF 8" VERTICALLY
INTO THE GROUND. BACKFILL
FENCE PC
AND COMPACT THE SOIL ON
A MIN. OE
BOTH SIDES OF GEOTEXTILE
THE C
CROSS SECTION
POSTS
STEP 1
{
STEP 2
A H
STAPLE
STAPLE STAPLE
TWIST POST TOGETHER
—
STAPLE
STEP 3 FINAL
CONFIGURATION
STAPLE --/
JOINING TWO ADJACENT SILT
FENCE SECTIONS (TOP VIEW)
SILT FENCE CONSTRUCTION SPECIFICATIONS
1. USE WOOD POSTS 1-3/4" x 1-3/4" t 1/16" (MINIMUM) SQUAT
QUALITY HARDWOOD. AS AN ALTERNATIVE TO WOODEN POST USE
SECTION STEEL POSTS WEIGHING NOT LESS THAN 1 POUND PER
2. USE 36" MINIMUM POSTS DRIVEN 16" MINIMUM INTO GROUND NO
3. USE WOVEN SLIT FILM GEOTEXTILE AS SPECIFIED IN SECTION H-1
FASTEN GEOTEXTILE SECURELY TO UPSLOPE SIDE OF FENCE POS'
STAPLES AT TOP AND MID —SECTION.
4. PROVIDE MANUFACTURER CERTIFICATION TO THE AUTHORIZED REPF
INSPECTION/ENFORCEMENT AUTHORITY SHOWING THAT THE GEOTEA
REQUIREMENTS IN SECTION H-1 MATERIALS.
5. EMBED GEOTEXTILE A MINIMUM OF 8" VERTICALLY INTO THE GROL
COMPACT THE SOIL ON BOTH SIDES OF FABRIC.
6. WHERE 2 SECTIONS OF GEOTEXTILE ADJOIN: OVERLAP, TWIST AND
ACCORDANCE WITH THIS DETAIL.
7. EXTEND BOTH ENDS OF THE SILT FENCE A MINIMUM OF 5' HORI;
DEGREES TO THE MAIN FENCE ALIGNMENT TO PREVENT RUNOFF F
THE ENDS.
8. REMOVE ACCUMULATED SEDIMENT AND DEBRIS WHEN BULGES DEV
OR WHEN SEDIMENT REACHES 25% OF FENCE HEIGHT. REPLACE
UNDERMINING OCCURS, REINSTALL FENCE.
SILT FENCE DETAIL
SCALE: N.T.S.
EXISTING GRADE
RIPfZl'
zi 1.5 TIME THE
• i
" 7L
1;mot
GEOTEXTILE FABRIC SHALL BERIPRAP PLACEMENT
eL. ;i; . • •
UAL
Ly
MAX. SLOPE FOR
2'
TOE TRENCH — MINIMUM TOE TRENCH DEPTH BELOW
CHANNEL INVERT SHALL BE DESIGNED BASED ON SITE
CHARACTERISTICS AND TO PREVENT FAILURE DUE TO
SCOUR
BANK PAVING DETAIL
SCALE: N.T.S.
OVERLAP
ROLL EC
6" DEEP (MIN.)
KEY I NTRENCH
PREPARED SLOPE (SEEDBED)
WITH SEED IN PLACE
6" MIN. OVERLAP
AT ROLL END (TYP.)
1. USE TEMP. SOIL STABILIZATION MATTING MADE OF DEGRADABLE (LASTS 6 MOS. MIN.) NATURAL OR
MAN—MADE FIBERS (MOSTLY ORGANIC). MAT MUST HAVE UNIFORM THICKNESS & DISTRIBUTION OF F
THROUGHOUT & BE SMOLDER RESISTANT. CHEMICALS USED IN THE MAT MUST BE NON —LEACHING t
NON —TOXIC TO VEGETATION & SEED GERMINATION & NON—INJUROUS TO THE SKIN. IF PRESENT, NE
MUST BE EXTRUDED PLASTIC WITH A MAX MESH OPENING OF 2"x2" & SUFFICIENTLY BONDED OR S
2" CENTERS ALONG LONGITUDINAL AXIS OF THE MATERIAL TO PREVENT SEPARATION OF THE NET FF
PARENT MATERIAL
2. SECURE MATTING USING STEEL STAPLES, WOOD STAKE OR BIODEGRADABLE EQUIVALENT. STAPLES MT
"U" OR "T" SHAPED STEEL WIRE HAVING A MIN. GAUGE OF NO. 11 AND NO. 8 RESPECTIVELY "U"
STAPLES MUST AVERAGE 1" TO 1-1/2" WIDE & BE A MIN. 6" LONG. "T" SHAPED STAPES MUST H,
MIN. 8" MAIN LEG, A MIN. 1" SECONDARY LEG, & A MIN. 4" HEAD. WOOD STAKES MUST BE ROUGI
HARDWOOD, 12" TO 24" IN LENGTH, 1" x 3" IN CROSS SECTION & WEDGE SHAPED AT THE BOTTOI
3. PERFORM FINAL GRADING, TOPSOIL APPLICATION, SEEDBED PREP. & PERMANENT SEEDING IN ACCOR
WITH SPECS. PLACE MATTING WITHIN 48 HRS OF COMPLETING SEEDING OPERATIONS UNLESS END 0
WORKDAY STABILIZATION IS SPECIFIED ON THE APPROVED EROSION & SEDIMENT CONTROL PLAN.
4. UNROLL MATTING DOWN SLOPE. LAY MAT SMOOTHLY & FIRMLY UPON THE SEEDED SURFACE. AVOID
STRETCHING THE MATTING.
5. OVERLAP OR ABUT ROLL EDGES PER MANUFACTURING RECOMMENDATIONS. OVERLAP ROLL ENDS BY
(MIN.) WITH THE UPSLOPE MAT OVERLAPPING ON TOP OF THE DOWNSLOPE MAT.
6. KEY IN THE UPSLOPE END OF MAT 6" (MIN.) BY DIGGING A TRENCH, PLACING THE MATTING ROLL I
THE TRENCH, STAPLING THE MAT IN PLACE, REPLACING THE EXCAVATED MATERIAL, & TAMPING TO EE
THE MAT END IN THE KEY.
7. STAPLE/STAKE MAT IN A STAGGERED PATTERN ON 4' (MAX.) CENTERS THROUGHOUT & 2' (MAX.) C
ALONG SEAMS, JOINTS & ROLL ENDS.
8. ESTABLISH & MAINTAIN VEGETATION SO THAT REQUIREMENTS FOR ADEQUATE VEGETATIVE ESTABLISHM
CONTINUOUSLY MET IN ACCORDANCE WITH SECTION B-4 VEGETATIVE STABILIZATION.
EROSION CONTROL BLANKET DETAIL
SCALE: N.T.S.
APPENDIX B
TYPICAL DAM AND PUMP MAINTENANCE DIG
7�Plr
SUMP W/INTAKE HOSE
FILTER/SCREEN OR
SUBMERSIBLE PUMP
WATERBODY
SPOIL CONTAINMENT BERM
(SILT FENCE, HAY BALES
OR OTHER APPLICABLE
MATERIALS)
FILTER BAG
RETAIN A MIN. 25'
VEGETATIVE BUFFER TO
THE EXTENT POSSIBLE
ENERGY DISSIPATOR/
SCOUR PROTECTION
III
III FLOW
SPOIL
II
,:III III
�� II
TROW ENGINEERING CONSULTANTS INC.
1w umrowu. mw.. swa zoo vu.0 U. ti. use o2w
Tror nHon[: (a.) o -eui
CAKE OA7E DRAWN APPROVED
NM 01-29-2004
I171k1
MAINTAIN A MINIMUM 25' I
VEGETATIVE BUFFER TO
THE EXTENT POSSIBLE
BACKHOE
FOR STREAM EQUIPMENT
CROSSINGS, SEE NOTE 14
SEE SHEET 2 FOR NOTES
(I COLONIAL PIPELINE COMPANY
ATLANTA, GEORGIA
TYPICAL DAM AND PUMP
MAINTENANCE DIG
AT WATERBODY
LESS THAN 15'
TROW PROD. N0.
DRAWING
SHEET
THES0050362
COL-0003
1 OF 2
DAM AND PUMP CROSSING
THE FOLLOWING IS A SEQUENCE OF CONSTRUCTION AND MITIGATION
MEASURES TO BE FOLLOWED AT ALL "DAM AND PUMP" TYPE CROSSINGS.
SEQUENCE OF ACTMTIES
STEP 1. IMPLEMENT THE TEMPORARY EROSION AND SEDIMENT CONTROLS.
STEP 2. INSTALL DRY STREAM CROSSING MATERIALS.
STEP 3. EXCAVATE TRENCH AND INSPECT OR REPLACE PIPE.
STEP 4. BACKFILL AND RESTORE STREAM BANKS.
STEP 5. REMOVE DAMS.
STEP 6. IMPLEMENT PERMANENT EROSION AND SEDIMENTATION CONTROLS.
0611:4
SCHEDULE INSTREAM ACTIVITY FOR LOW FLOW PERIODS AND
FOR THE APPROPRIATE TIMING WINDOW.
2. MARK OUT AND MAINTAIN LIMITS OF AUTHORIZED WORK
AREAS WITH FENCING OR FLAGGING TAPE TO AVOID
UNNECESSARY DISTURBANCE OF VEGETATION. ENSURE
EQUIPMENT OPERATORS WORKING ON THE CROSSING HAVE
BEEN BRIEFED ABOUT THIS PLAN AND THE MEASURES
NEEDED TO PROTECT WATER QUALITY. INSTALL PRE —WORK
SEDIMENT CONTROL MEASURES AS SPECIFIED IN THE PLAN.
ALL NECESSARY EQUIPMENT AND MATERIALS TO BUILD THE
DAMS AND TO PUMP WATER MUST BE ON SITE OR READILY
AVAILABLE PRIOR TO COMMENCING IN —WATER CONSTRUCTION.
3. CONTRACTOR SHALL SUPPLY, INSTALL AND MAINTAIN SEDIMENT
CONTROL STRUCTURES, AS DEPICTED AND ALONG DOWN GRADIENT
SIDES OF WORK AREAS AND STAGING AREAS SUCH THAT NO
HEAVILY SILT LADEN WATER ENTERS WATERBODY.
a. NO HEAVILY SILT LADEN WATER SHALL BE DISCHARGED DIRECTLY
OR INDIRECTLY INTO THE WATERBODY.
b. EROSION AND SEDIMENT CONTROL STRUCTURE LOCATIONS AS
DEPICTED ARE APPROXIMATE AND MAY BE ADJUSTED AS DIRECTED
BY THE COMPANY INSPECTOR TO ACTUAL SITE CONDITIONS.
c. SILT FENCE OR HAY BALE INSTALLATIONS SHALL INCLUDE
REMOVABLE SECTIONS TO FACILITATE ACCESS DURING
CONSTRUCTION. UTILIZE HAY BALE BARRIERS ONLY IN LIEU
OF A SILT FENCE WHERE FREQUENT ACCESS IS REQUIRED.
d. SEDIMENT LADEN WATER FROM TRENCH DEWATERING SHALL BE
DISCHARGED TO A WELL VEGETATED UPLAND AREA, INTO A HAY
BALE DEWATERING STRUCTURE OR GEOTEXTILE FILTER BAG.
e. SEDIMENT CONTROL STRUCTURES MUST BE IN PLACE AT ALL
TIMES ACROSS THE DISTURBED PORTIONS OF THE RIGHT—OF—WAY
EXCEPT DURING EXCAVATION/INSTALLATION OF THE CROSSING PIPE.
4. TO THE EXTENT POSSIBLE, MAINTAIN A MINIMUM 25 FEET
VEGETATIVE BUFFER STRIP BETWEEN DISTURBED AREAS AND THE
WATERBODY. INSTALL AND MAINTAIN A SILT FENCE UPSLOPE
OF THE BUFFER STRIP ON EACH SIDE OF THE WATERBODY.
THE SILT FENCE SHOULD INCORPORATE REMOVABLE "GATES" AS
REQUIRED TO ALLOW ACCESS WHILE MAINTAINING EASE OF
REPLACEMENT FOR OVERNIGHT OR DURING PERIODS OF RAINFALL.
5. CONSTRUCT A TEMPORARY SUMP UPSTREAM OF THE DAM AND
LINE WITH ROCKALL IF A NATURAL POOL DOES NOT EXIST.
INSTALL THE PUMP OR PUMP INTAKE IN THE POOL OR SUMP.
DISCHARGE WATER ONTO AN ENERGY DISSIPATOR DOWNSTREAM
OF THE WORK AREA.
6, EXCAVATED MATERIAL MUST NOT BE STOCKPILED WITHIN 10 FT.
OF THE WATERBODY. THIS MATERIAL MUST BE CONTAINED
WITHIN BERM CONTAINMENT, WITH SECONDARY SILT FENCE
PROTECTION TO PREVENT SATURATED SOIL FROM FLOWING
BACK INTO THE WATERBODY.
7. CHEMICALS, FUELS, LUBRICATING OILS SHALL NOT BE STORED
AND NOR SHALL EQUIPMENT BE REFUELED WITHIN 100 FT. OF THE
WATERBODY. PUMPS ARE TO BE REFUELED AS PER THE SPCC PLANS.
MAINTENANCE OF STREAMFLOW
IF THERE IS ANY FLOW IN THE WATERBODY, INSTALL
PUMPS TO MAINTAIN STREAMFLOW AROUND THE ISOLATED
SECTIONS OF CHANNEL. THE PUMP IS TO HAVE 1.5
TO 2 TIMES THE PUMPING CAPACITY OF ANTICIPATED FLOW.
A SECOND STANDBY PUMP OF EQUAL CAPACITY IS TO BE
READILY AVAILABLE AT ALL TIMES. AN ENERGY DISSIPATOR
IS TO BE BUILT TO ACCEPT PUMP DISCHARGE WITHOUT
STREAMBED OR STREAMBANK EROSION. IF THE WORK
IS PROLONGED BEYOND ONE DAY THE AREA NEEDS
TO BE MONITORED OVERNIGHT.
B. IF A REPLACEMENT, PIPE MAKE—UP AREAS ARE TO BE
LOCATED AT LEAST 50 FT. FROM THE WATER'S EDGE
(WHERE TOPOGRAPHIC CONDITIONS PERMIT) AND SHALL
BE THE MINIMUM AREA NEEDED.
9. DAMS ARE TO BE MADE OF STEEL PLATE, INFLATABLE PLASTIC
DAM, SAND BAGS, COBBLES, WELL GRADED COARSE GRAVEL FILL,
OR ROCK FILL. DAMS MAY NEED KEYING INTO THE BANKS AND
STREAMBED. ENSURE THAT THE DAM AND VEHICLE CROSSING IF
NEEDED) ARE LOCATED FAR ENOUGH APART TO ALLOW FORA WIDE
EXCAVATION. CAP FLUMES USED UNDER VEHICLE CROSSING
DURING DRY CROSSING.
10. DEWATER AREA BETWEEN DAMS IF POSSIBLE. DEWATERING
SHOULD OCCUR IN A STABLE VEGETATIVE AREA A MINIMUM OF
50 FT. FROM ANY WATERBODY. THE PUMP DISCHARGE SHOULD
BE DISCHARGED ONTO A STABLE SPILL PAD, FILTER BAG OR
HAY BALE STRUCTURE TO PREVENT LOCALIZED EROSION.
THE DISCHARGE WATER SHOULD ALSO BE FORCED INTO SHEET
FLOW IMMEDIATELY BEYOND THE SPILL PAD BY USING HAY BALES
AND THE NATURAL TOPOGRAPHY. DISCHARGED WATER SHALL NOT
BE ALLOWED TO FLOW INTO ANY WATERBODY OR WETLAND. IF IT
IS NOT POSSIBLE TO DEWATER THE EXCAVATION DUE TO SOILS
WITH A HIGH HYDRAULIC CONDUCTIVITY, THE EXCAVATION IS TO BE
CARRIED OUT IN THE STANDING WATER. PUMP ANY DISPLACED WATER
AS DESCRIBED ABOVE TO PREVENT OVERTOPPING OF DAMS.
11. INSPECT/REPAIR PIPELINE AS NEEDED.
12. CONTRACTOR SHALL RESTORE THE STREAM BED AND BANKS TO
APPROXIMATE PRE —CONSTRUCTION CONTOURS, BUT NOT TO
EXCEED 2:1 SLOPE.
a. CONTRACTOR SHALL INSTALL PERMANENT EROSION AND
SEDIMENT CONTROL STRUCTURES AS INDICATED ON A SITE
SPECIFIC BASIS. IN THE ABSENCE OF SITE SPECIFIC INFOR—
MATION, A FLEXIBLE CHANNEL LINER SUCH AS NAG C125 OR
C350 WHICH IS CAPABLE OF WITHSTANDING ANTICIPATED FLOW
SHALL BE INSTALLED. ALTERNATIVELY, ROCK RIP —RAP SHALL
BE INSTALLED.
b. ANY MATERIALS PLACED IN THE STREAM TO FACILITATE
CONSTRUCTION SHALL BE REMOVED DURING RESTORATION.
BANKS SHALL BE STABILIZED AND TEMPORARY SEDIMENT
BARRIERS INSTALLED AS SOON AS POSSIBLE AFTER IN —STREAM
WORK BUT WITHIN 24 HOURS OF COMPLETING IN —STREAM WORK.
c. MAINTAIN A SILT FENCE OR HAY BALE BARRIER ALONG
THE WATERBODY UNTIL VEGETATION IS ESTABLISHED IN
ADJACENT DISTURBED AREAS.
13. WHEN THE STREAMBED HAS BEEN RESTORED, THE CREEK BANKS
ARE TO BE CONTOURED TO A STABLE ANGLE AND PROTECTED
WITH EROSION RESISTANT MATERIAL COMPATIBLE WITH FLOW
VELOCITY BETWEEN DAMS (E.G., EROSION CONTROL BLANKETS,
CRIBBING, ROCK RIP —RAP, ETC.). THE DAMS ARE TO BE REMOVED
DOWNSTREAM FIRST. KEEP PUMP RUNNING UNTIL NORMAL FLOW
IS RESUMED. COMPLETE BANK TRIMMING AND EROSION PROTECTION.
IF SANDBAGS ARE USED FOR THE DAMS, PLACE AND REMOVE BY
HAND TO AVOID EQUIPMENT BREAKING BAGS.
14. TEMPORARY EQUIPMENT CROSSING CAN BE CONSTRUCTED USING EITHER
A FLUME CROSSING OR A TEMPORARY BRIDGE. FOR BRIDGE CROSSING
DETAILS, REFER TO THE TYPICAL RAILCAR BRIDGE CROSSING OR
TYPICAL MAT CROSSING DRAWINGS.
TROW ENGINEERING CONSULTANTS INC.
1100 uflRJPIXRIN aLw., SURE 200 iN1MNSSEE. i1.. USA 32"
vuoae (aso7 3es—sass
REVISION DATE
CAIE DATE DRAWN PPPROVED
NTS 01-29-2004 ALS —
D� COLONIAL PIPELINE COMPANY
ATLANTA, GEORGIA
TYPICAL DAM AND PUMP
MAINTENANCE DIG
AT WATERBODY LESS THAN 15'
TROW PROD. NO.1 DRAWING SHEET
THES0050362 I COL-00030 2 OF 2
APPENDIX C
CPC SOIL EROSION AND SEDIMENT CONTROL PLAN
Colonial Pipeline Company
Soil Erosion and Sediment Control Plan
For
Pipeline Maintenance Activities
Objective
Disturbed areas are to be restored as close as practical to their original contours and
conditions so that once vegetation is reestablished, erosion will be reduced to the same
or lower level that existed prior to disturbance.
Description
This section defines the soil erosion and sediment control measures that Colonial
Pipeline Company will implement during and after inspection and repairs of the pipeline
are complete. The objectives of this plan are to establish general guidelines for
controlling erosion and sedimentation and to specify criteria for sensitive or particularly
susceptible soil areas. The plan incorporates measures to control erosion and
sedimentation, including minimizing cover removal, limiting the time of exposure,
limiting the flow of water onto the disturbed right-of-way, and filtering or settling out
sediment from water flowing from the right-of-way.
The primary objective of the soil erosion and sediment control plan is to reduce the area
and duration of soil disturbance and reestablish permanent vegetation as soon after
construction as possible, thereby minimizing long-term erosion and sedimentation.
Some erosion is inevitable during construction; however, the plan includes measures to
reduce erosion to the minimum practical.
Colonial Pipeline Company plans to reduce soil erosion and provide sediment control
during the repair of the pipeline at the project site by incorporating the following
measures:
• Water pumped from the construction area as part of the dewatering operation
from the excavation will be filtered through silt filtration bags and discharged to
a well -vegetated area.
• All work will be confined within the existing right-of-way. Staked hay bales and silt
fence will be installed around the worksite and maintained until vegetation is established.
Proper controls will be added if necessary during construction.
• All terms and conditions within Nationwide Permit 3 will be followed.
• Erosion control measures will be installed prior to conducting any soil disturbing
activities associated with the pipeline maintenance activity.
• Clearing of vegetation will be kept to an absolute minimum and confined to the
existing pipeline easement area. The easement area is 50 feet in width and devoid
of large trees. The right of way is vegetated with undergrowth grasses and other
short vegetation.
• Vegetation will be reestablished within disturbed areas and along stream banks
as soon as possible upon completion of work. Disturbed areas will be seeded
with a wetland seed mixture
• All erosion and sediment control measures will be inspected every two weeks at a
minimum and after every significant rainfall event of 0.5 inch or more until
disturbed areas have been stabilized. Identified damages to control measures
must be repaired immediately.
Refuse and Waste Disposal
Colonial's representative will not allow the Contractor to discard any litter, including
paper, bottles, cans, rags, sacks, welding rod stubs, fuel, crankcase draining, coating
materials, equipment, and junk pipe in the ditch or along the right-of-way. All refuse
must be collected and disposed in accordance with company specifications. Personnel
will be instructed regarding the correct procedure for waste disposal.
Maintenance/Inspection Procedures
The following inspection and maintenance practices will be implemented to maintain
erosion andsediment controls:
i. All control measures will be inspected every two weeks at a minimum and following
any storm event of 0.5 inch or greater.
2. All control measures will be maintained in good working order. If a repair is
necessary, it will be initiated within 24 hours of the report.
3. Built-up sediment will be removed from silt fences when it has reached one-third the
height ofthe fence.
4. Silt fences will be inspected for depth of sediment, tears, secure attachment of the
fabric to the fence posts, and firm placement of the fence posts in the ground.
5. Temporary and permanent seeding and planting will be inspected for bare spots,
washouts, and healthy growth.
6. Colonial Pipeline Company will select individuals to be responsible for inspections,
maintenance and repair activities, and completion of the inspection and
maintenance report. Personnel selected for inspection and maintenance
responsibilities will receive training from Colonial Pipeline Company or its
representative. Personnel must be trained in all practices necessary for maintaining
the erosion and sediment controls used on -site.
APPENDIX D
401 & BUFFER PERMITTING PCN SUBMITTAL CHECKLIST
Version 1.4
January 9, 2009
401 & Buffer Permitting PCN Submittal Checklist
® The application fee (Checks may be made out to "N.C. Division of Water Resources"
- $240.00 for 401 Water Quality Certification with minor impacts
- $570.00 for 401 Water Quality Certification with major impacts
- Express Review Fee (Amount requested on Acceptance Letter)
® Four (4) complete and collated copies of the PCN Application and supporting
documentation (instead of providing 4 copies of the full size plans you may provide two
copies of full size plans along with two copies of 11 X 17 plans)
N/A Stormwater Management Plan (if applicable — see PCN Form Help File Section E)
1) Please provide three (3) copies of the stormwater management plans along with all
supporting information pertaining to this project including the following:
a. Entire site development/layout plans delineating all drainage areas;
b. Design calculation sheets for all proposed BMP(s) sized for both on -site and
off -site drainage;
c. BMP supplements for each proposed BMP and Required Items Check List
(http://portal.ncdenr.org/web/ir/bmp-manual) along with all required items;
d. A Notarized Operation & Maintenance Agreement for each stormwater
management facility;
e. Detailed construction drawing sheets shall include
(i) Erosion and sediment control plans;
(ii) Installation and planting schedules for the proposed BMPs;
(iii) Appropriately scaled plan views and cross sectional details of all
BMPs and associated components — inlet and outlet structures,
forebay, respective zones and pertinent elevations.
N/A If your project is located within a State implemented Riparian Buffer Rule Area, submit the
following along with site plans and PCN form:
1) Three (3) copies of the details for on -site diffuse flow provisions, (refer to
http://portal.ncdenr.org/web/Ir/bmp-manual).
N/A DWR Stream Determination Forms for streams on property and DWR determination
letter for wetlands or streams (if applicable).
The following is the most critical of all the information that you must provide. The quality and
detail of the information will often determine the expeditiousness of the review. The following is
a checklist of the types of pertinent information required at a minimum:
Maps and Plans:
® The most recent version of the 1:24,000 USGS Topographic Map - Please cleanly draw or
delineate the site boundaries on the topographic map.
® The most recent version of the bound and published County NRCS Soil Survey Map -
(required for projects within the Neuse River Basin, Tar -Pamlico River Basin, Randleman
Lake Watershed and the Catawba River Basin, also recommended for all projects) -
Please clearly delineate the site boundaries, etc. on the map. If the delineation obscures
any of the features, it is recommended that a clean copy be provided. Copies of the
Version 1.4
January 9, 2009
current soil survey and/or soil survey map sheets can be obtained from the local NRCS
County Office (http://www.nc.nres.usda.gov/). GIS soil layers are not acceptable.
® Vicinity map - Please clearly mark the location and approximate boundaries of the property
and project on the map. Please indicate north arrow and scale. Please include applicable
road names or State Road numbers.
® The Site Plan - The most critical map to be provided is the site plan. You must provide full
sized plans. The following is the minimum list of plans that are typically needed.
® Pre-construction/Pre-existing conditions - This sheet (or sheets) must include:
• All jurisdictional and non -jurisdictional wetland, stream, water features, State regulated
buffers (delineated into Zones 1 and 2)
• Topographic contours with elevations
• Any existing structures and impervious areas
• Existing utility lines and easements
• Existing roads, culverts, and other pertinent features
• North arrow and the scale (1":50' scale is recommended).
® Proposed conditions - This sheet (or sheets) must include:
• All jurisdictional and non -jurisdictional wetland, stream, water features, State regulated
buffers (delineated into Zones 1 and 2)
• Lot layout (if a subdivision or commercial development is proposed) - lots must be
developable without further impacts to jurisdictional and non -jurisdictional wetlands,
streams, water features, and State regulated buffers. Building envelopes must be
provided when streams, wetlands, riparian buffers, or water features exist on a lot
• All built -out structures and impervious cover
• Final grading contours with elevations
• All utilities and easements (including septic fields on all lots within 100 feet of stream,
wetland, or water features - if applicable)
• Impacted areas — these should correspond with the Impact numbers listed on your PCN
form.
N/A Drainage Plans - Final drainage plans must include the following:
• Locations and pertinent elevations and sizes of the stormwater collection system and
drainage ways
• All inlets and outlets must also be shown with pertinent elevations (All outlets to
wetlands must be at a non -erosive velocity, generally less than 2 ft/sec during the peak
flow from the 10-yr storm)
• Scaled stormwater BMPs must also be indicated as required by DWR rules and policies
• In certain cases (see Section E of PCN form), final stormwater management plans must
also be provided (see Stormwater Management Plan Checklist)
® Proposed Impacts - All impacts to jurisdictional and non -jurisdictional wetland, stream,
water features, and State regulated buffers must be shown and labeled on the site plans at
a scale no smaller than 1" = 50'. All excavation, fill, flooding, stabilization, and other impacts
that will be conducted in or near jurisdictional and non -jurisdictional wetland, stream, water
features, and State regulated buffers must be indicated. Please provide cross sectional
details showing the provisions for aquatic life passage (burial of culvert 20% for culverts s 48
inches, and 1-foot for culverts > 48 inches).
Version 1.4
January 9, 2009
Wetland Impacts: N/A
❑ Precise grading and final elevation contours must be provided. Existing
vegetation and any clearing must be specified.
❑ All subsurface utility lines must indicate the location of anti -seep collars.
Construction detail for anti -seep collars must be provided.
❑ Roadway or other crossings of riparian wetlands may require floodway culverts to
maintain existing hydrological conditions.
❑ Plans should show that the hydrology of remaining wetlands on the site will be
maintained.
Stream Impacts:
® Stream impacts must be clearly shown on the plans. The centerline as well as
the banks of the stream must be surveyed or located by GPS for the portion of
the stream to be impacted.
N/A The inlet and the outlet of all culverts should be aligned with the stream as
much as possible. Inlet and outlet elevations and streambed elevations should
be indicated. Any inlet or outlet protection must be shown and enumerated on
the impact map(s).
N/A For bottomless culverts or other spans, a vertical cross section should be
provided that shows the minimum distance from each span to each stream bank,
the stream cross section, the height of the span above the stream and the
minimum distance from the edge of each footer to each stream bank.
Additionally, please provide a signed and sealed geotechnical report of
subsurface soils at the proposed bottomless culvert location. The report must
comply with the Division of Highways — Guidelines for Drainage Studies and
Hydraulic Design, prepared by A.L. Hankins, Jr., State Hydraulics Engineer -
1999.
N/A Multiple culverts or sectioned box culverts typically require the use of sills, off-
setting or other means to match the cross section of the existing stream (in order
to maintain stream stability and provide aquatic life passage). A vertical cross
section of the culverts should be shown overlain with the up and downstream
stream cross section including the stream flood -prone area.
N/A Impacts associated with dam construction must indicate and enumerate all fill
associated with the dam footprint, spillway and any bank stream bank
stabilization. The length of stream impounded must also be indicated and
enumerated.
APPENDIX E
USACE WILMINGTON DISTRICT PCN FORM
o�npFryWjAAT f', O
Office Use Only:
Corps action ID no.
DWQ project no.
Form Version 1.3 Dec 10 2008
Pre -Construction Notification (PCN) Form
A.
Applicant Information
1.
Processing
1 a.
Type(s) of approval sought from the
Corps:
El Section 404 Permit El Section 10 Permit ®N/A
1b.
Specify Nationwide Permit (NWP) number: 3 (a) & (c) or General Permit (GP) number:
1c.
Has the NWP or GP number been verified by the Corps?
❑ Yes ® No
1 d.
Type(s) of approval sought from the DWQ (check all that apply):
® 401 Water Quality Certification — Regular ❑ Non-404 Jurisdictional General Permit
❑ 401 Water Quality Certification — Express ❑ Riparian Buffer Authorization
1 e.
Is this notification solely for the record
because written approval is not required?
For the record only for DWQ 401
Certification:
❑ Yes ® No
For the record only for Corps Permit:
® Yes ❑ No
1f.
Is payment into a mitigation bank or in -lieu fee program proposed for mitigation
of impacts? If so, attach the acceptance letter from mitigation bank or in -lieu
fee program.
❑ Yes ® No
1 g.
Is the project located in any of NC's twenty coastal counties. If yes, answer 1 h
below.
❑ Yes ® No
1 h.
Is the project located within a NC DCM Area of Environmental Concern (AEC)?
❑ Yes ® No
2.
Project Information
2a.
Name of project:
Colonial Pipeline Company Line 24s Exposure Johnston Co. NC 2020
2b.
County:
Johnston
2c.
Nearest municipality / town:
Clayton
2d.
Subdivision name:
N/A
2e.
NCDOT only, T.I.P. or state
project no:
N/A
3.
Owner Information
3a.
Name(s) on Recorded Deed:
Name on Easement Agreement: Thomas D. & Hazel H. Poole and Roy H. & Marjorie Y.
Grimes; Please see PCN Form Attachment A — Easement Agreement.
3b.
Deed Book and Page No.
N/A
3c.
Responsible Party (for LLC if
applicable):
N/A
3d.
Street address:
N/A
3e. City, state, zip:
Clayton (Johnston County), North Carolina 27520
3f.
Telephone no.:
N/A
3g.
Fax no.:
N/A
3h.
Email address:
N/A
Page 1 of 11
PCN Form — Version 1.3 December 10, 2008 Version
4. Applicant Information (if different from owner)
4a. Applicant is:
❑ Agent ® Other, specify:
4b. Name:
John Wyatt
4c. Business name
(if applicable):
Colonial Pipeline Company (CPC)
4d. Street address:
5251 Hwy. 153 Suite C #365
4e. City, state, zip:
Hixson, TN 37343
4f. Telephone no.:
770-819-3557
4g. Fax no.:
770-819-3567
4h. Email address:
Jmwyatt@colpipe.com
5. Agent/Consultant Information (if applicable)
5a. Name:
Trey Trickett
5b. Business name
(if applicable):
Corblu Ecology Group LLC.
5c. Street address:
3225 South Cherokee Lane, Bldg 800
5d. City, state, zip:
Woodstock, Georgia 30188
5e. Telephone no.:
770-591-9990
5f. Fax no.:
770-591-9993
5g. Email address:
Udckett@corblu.com
Page 2 of 11
B. Project Information and Prior Project History
1. Property Identification
1a. Property identification no. (tax PIN or parcel ID):
7112 (Tax PIN)
1b. Site coordinates (in decimal degrees):
Latitude: 35.596100 Longitude:-78.498800
(DD.DDDDDD) (-DD.DDDDDD)
1c. Property size:
0.201acre approximate project area
2. Surface Waters
2a. Name of nearest body of water (stream, river, etc.) to
Swift Creek
proposed project:
2b. Water Quality Classification of nearest receiving water:
C;NSW
2c. River basin: map is available at
Neuse
hftp://h2o.enr.state.nc.us/admin/maps/
3. Project Description
3a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this
application:
The work is to be conducted within CPC's existing mowed and maintained right-of-way (ROW). The stream has
experienced significant erosion (incision) from past erosional events (i.e., heavy rainfall) which is the cause of the pipeline
exposure.
3b. List the total estimated acreage of all existing wetlands on the property:
N/A — No wetlands present within project area.
3c. List the total estimated linear feet of all existing streams (intermittent and perennial) on the property:
Approximately 68 linear feet of an unnamed perennial stream.
3d. Explain the purpose of the proposed project:
Recent high flow events from significant precipitation and heavy rains have resulted in stream bed and bank erosion to
the unnamed perennial stream within CPC's right-of-way (ROW), exposing CPC's Line 23s and Line 24s. CPC proposes
to inspect the exposed line and replace the required protective cover over the pipeline using pre -cast revetment mats.
3e. Describe the overall project in detail, including the type of equipment to be used:
CPC intends to inspect the exposed pipeline and replace the required protective cover over the pipeline through the use
of pre -cast revetment mats. To re-establish the protective cover CPC intends to conduct the following: 1) excavate the
exposure on Line 24s and Line 23s; 2) inspect and make repairs to Line 23s and Line 24s as necessary; 3) backfill the
excavation area; and 4) restore the stream to approximate pre-hurricane/erosional contours and elevations using returned
excavated material and revetment mats keyed into the stream bed and bank in a manner that maintains grade and
stream flow conditions.
To minimize sedimentation to the unnamed perennial stream during the above -mentioned maintenance activity, dams
constructed of sand bags, steel plates, or water -inflatable plastic dams will be temporarily placed upstream of the
maintenance area. The stream flow will be temporarily pumped around the maintenance area, discharging immediately
downstream via an energy dissipater to prevent stream scour. The pump used will be sufficiently sized to accommodate
the anticipated stream flow.
The temporarily excavated soils will be stored within the adjacent upland areas and returned to the excavated trenches,
and approximate pre -erosion contours will be restored following completion of the maintenance activity. It is our
understanding once the required protective pipeline cover (pre -cast revetment mats) is keyed into the streambed in a
manner that maintains existing grade and stream flow, the temporary dams will be removed, and normal streamflow
restored. Rip rap used to below the matting system to stabilize the revetment mats within the stream bed will be placed so
the finished top elevation of the rip rap does not exceed that of the original stream bed, and any rip rap utilized for bank
stabilization will be placed on filter cloth as required. CPC's standard erosion control practices will be employed.
Specifically, the disturbed areas along the stream bank will be revegetated with a grass seed mix and stabilized with
straw and silt fence.
Page 3 of 11
PCN Form — Version 1.3 December 10, 2008 Version
4.
Jurisdictional Determinations
4a. Have jurisdictional wetland or stream determinations by the
Corps or State been requested or obtained for this property /
project (including all prior phases) in the past?
Comments:
❑ Yes ❑ No ® Unknown
4b.
If the Corps made the jurisdictional determination, what type
of determination was made?
❑Preliminary❑Final
4c.
If yes, who delineated the jurisdictional areas?
Name (if known):
Agency/Consultant Company:
Other:
4d.
If yes, list the dates of the Corps jurisdictional determinations or State determinations and attach documentation.
S.
Project History
5a.
Have permits or certifications been requested or obtained for
this project (including all prior phases) in the past?
❑ Yes ® No ❑ Unknown
5b.
If yes, explain in detail according to "help file" instructions.
6.
Future Project Plans
6a.
Is this a phased project?
❑ Yes ® No
6b. If yes, explain.
Page 4 of 11
C. Proposed Impacts Inventory
1. Impacts Summary
la. Which sections were completed below for your project (check all that apply):
❑ Wetlands ® Streams - tributaries ❑ Buffers
❑ Open Waters ❑ Pond Construction
2. Wetland Impacts
If there are wetland impacts proposed on the site, then complete this question for each wetland area impacted.
2a.
2b.
2c.
2d.
2e.
2f.
Wetland impact
Type of jurisdiction
number —
Type of impact
Type of wetland
Forested
(Corps - 404, 10
Area of impact
Permanent (P) or
(if known)
DWQ — non-404, other)
(acres)
Temporary T
W1 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
W2 ❑ P ❑ T
❑ Yes
❑ No
❑ Corps
❑ DWQ
W3 ❑ P ❑ T
❑ Yes
❑ No
❑ Corps
❑ DWQ
W4 ❑ P ❑ T
❑ Yes
❑ No
❑ Corps
❑ DWQ
W5 ❑ P ❑ T
❑ Yes
❑ No
❑ Corps
❑ DWQ
W6 ❑ P ❑ T
❑ Yes
❑ Corps
❑ No
❑ DWQ
2g. Total wetland impacts
2h. Comments:
3. Stream Impacts
If there are perennial or intermittent stream impacts (including temporary impacts) proposed on the site, then complete this
question for all stream sites impacted.
3a.
3b.
3c.
3d.
3e.
3f.
3g•
Stream impact
Type of impact
Stream name
Perennial
Type of jurisdiction
Average
Impact
number -
(PER) or
(Corps - 404, 10
stream
length
Permanent (P) or
intermittent
DWQ — non-404,
width
(linear
Temporary (T)
(INT)?
other)
(feet)
feet)
Submar matting
Unnamed
® PER
® Corps
S1 ®P ❑ T
and rip rap bank
Tributary to Dixon
❑ INT
❑ DWQ
4 feet
65 LF
stabilization
Branch
Workspace (dam
Unnamed
❑ PER
❑ Corps
S2 ❑ P ❑ T
and pump) and
Tributary to Dixon
El INT
El DWQ
excavation area
Branch
S3 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
S4 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
S5 ❑ P [-IT
❑ PER
❑ Corps
❑ INT
❑ DWQ
S6 ❑ P ❑ T
❑ PER
❑ Corps
❑ INT
❑ DWQ
3h. Total stream and tributary Impacts
65 If
3i. Comments:
Page 5 of 11
4. Open Water Impacts
If there are proposed impacts to lakes, ponds, estuaries, tributaries, sounds, the Atlantic Ocean, or any other open water of
the U.S. then indivi ually list all open water impacts below.
4a.
4b.
4c.
4d.
4e.
Open water
Name of waterbody
impact number -
(if applicable)
Type of impact
Waterbody type
Area of impact (acres)
Permanent (P) or
Temporary T
01 ❑P❑T
02 ❑P❑T
03 ❑P❑T
04 ❑P❑T
4f. Total open water Impacts
4g. Comments:
5. Pond or Lake Construction
If pond or lake construction proposed, then complete the chart below.
5a.
5b.
5c.
5d.
5e.
Wetland Impacts (acres)
Stream Impacts (feet)
Upland
Pond ID
Proposed use or purpose
(acres)
number
of pond
Flooded
Filled
Excavated
Flooded
Filled
Excavated
Flooded
P1
P2
5f. Total
5g. Comments:
5h. Is a dam high hazard permit required?
❑ Yes ❑ No If yes, permit ID no:
5i. Expected pond surface area (acres):
5j. Size of pond watershed (acres):
5k. Method of construction:
6. Buffer Impacts (for DWQ)
If project will impact a protected riparian buffer, then complete the chart below. If yes, then individually list all buffer impacts
below. If any impacts require mitigation, then you MUST fill out Section D of this form.
6a.
® Neuse ❑Tar -Pamlico El Other:
Project is in which protected basin?
❑ Catawba ❑ Randleman
6b.
6c.
6d.
6e.
6f.
6g.
Buffer impact
number -
Reason
Buffer
Zone 1 impact
Zone 2 impact
Permanent (P) or
for
Stream name
mitigation
(square feet)
(square feet)
Temporary T
impact
required.
131 ❑PFIT
❑Yes
❑ No
B2 ❑P❑T
❑Yes
❑ No
133 ❑ P ❑ T
❑ Yes
❑ No
6h. Total buffer Impacts
N/A
N/A
6i. Comments: No riparian buffer protection rules, the pipeline maintenance is exempt under 15A NAC 02B .0243 (3)(a)(i).
Page 6 of 11
D. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing project.
Significant precipitation has resulted in stream bed and bank erosion in an unnamed perennial stream within CPC's
ROW, exposing CPC's Line 23s and Line 24s. The exposure and lack of surface pipeline protection at this project
location has resulted in conditions that may lead to potential damage to CPC's petroleum pipeline Line 23s and Line 24s.
Further, these conditions are not consistent with CPC's or regulatory requirements for pipeline protection. Therefore, CPC
is required to conduct the work for the safety of the pipeline (unavoidable work).
b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques.
CPC will only conduct work within their mowed and maintained ROW, thereby minimizing impacts to the greatest extent
possible.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for
impacts to Waters of the U.S. or Waters of the State?
❑ Yes ® No
2b. If yes, mitigation is required by (check all that apply):
❑ DWQ ❑ Corps
2c. If yes, which mitigation option will be used for this
project?
❑ Mitigation bank
El Payment to in -lieu fee program
❑ Permittee Responsible Mitigation
3. Complete If Using a Mitigation Bank
3a. Name of Mitigation Bank:
3b. Credits Purchased (attach receipt and letter)
Type
Quantity
3c. Comments:
4. Complete If Making a Payment to In -lieu Fee Program
4a. Approval letter from in -lieu fee program is attached.
❑ Yes
4b. Stream mitigation requested:
linear feet
4c. If using stream mitigation, stream temperature:
❑ warm ❑ cool ❑cold
4d. Buffer mitigation requested (DWQ only):
square feet
4e. Riparian wetland mitigation requested:
acres
4f. Non -riparian wetland mitigation requested:
acres
4g. Coastal (tidal) wetland mitigation requested:
acres
4h. Comments:
S. Complete if Using a Permittee Responsible Mitigation Plan
5a. If using a permittee responsible mitigation plan, provide a description of the proposed mitigation plan.
Page 7 of 11
PCN Form — Version 1.3 December 10, 2008 Version
6. Buffer Mitigation (State Regulated Riparian Buffer Rules) — required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
El Yes ® No
buffer mitigation? If yes, you will have to fill out this entire form — please
contact the State for more information.
6b. If yes, then identify the square feet of impact to each zone of the riparian buffer that requires mitigation. Calculate the
amount of mitigation required.
6c.
6d.
6e.
Zone
Reason for impact
Total impact
Multiplier
Required mitigation
(square feet)
(square feet)
Zone 1
3 (2 for Catawba)
Zone 2
1.5
6f. Total buffer mitigation required:
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in -lieu fee fund).
6h. Comments: No riparian buffer protection rules, project is not located on the Catawba River mainstem nor mainstem lakes.
Page 8 of 11
E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1 a. Does the project include or is it adjacent to protected riparian buffers identified
❑ Yes ® 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
Comments:
2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project?
0%
2b. Does this project require a Stormwater Management Plan?
❑ Yes ® No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why: This is a maintenance activity for an
existing petroleum pipeline and does not involved the construction of any roads or structures.
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:
❑ Certified Local Government
2e. Who will be responsible for the review of the Stormwater Management Plan?
❑ DWQ Stormwater Program
❑ DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government's jurisdiction is this project?
Johnston County
❑ Phase II
3b. Which of the following locally -implemented stormwater management programs
❑ NSW
❑ 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
❑ ORW
❑ Session Law 2006-246
(check all that apply):
® Other: N/A- Pipeline
Maintenance
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 9 of 11
PCN Form — Version 1.3 December 10, 2008 Version
F. Supplementary Information
1. Environmental Documentation (DWQ Requirement)
1 a. Does the project involve an expenditure of public (federal/state/local) funds or the
❑ Yes ® No
use of public (federal/state) land?
1 b. If you answered "yes" to the above, does the project require preparation of an
environmental document pursuant to the requirements of the National or State
❑ Yes ❑ No
(North Carolina) Environmental Policy Act (NEPA/SEPA)?
1c. If you answered "yes" to the above, has the document review been finalized by the
State Clearing House? (If so, attach a copy of the NEPA or SEPA final approval
❑Yes ❑ No
letter.)
Comments:
2. Violations (DWQ Requirement)
2a. Is the site in violation of DWQ Wetland Rules (15A NCAC 2H .0500), Isolated
Wetland Rules (15A NCAC 2H .1300), DWQ Surface Water or Wetland Standards,
❑ Yes ® No
or Riparian Buffer Rules (15A NCAC 2B .0200)?
2b. Is this an after -the -fact permit application?
❑ Yes ® No
2c. If you answered "yes" to one or both of the above questions, provide an explanation of the violation(s):
3. Cumulative Impacts (DWQ Requirement)
3a. Will this project (based on past and reasonably anticipated future impacts) result in
❑ Yes ® No
additional development, which could impact nearby downstream water quality?
3b. If you answered "yes" to the above, submit a qualitative or quantitative cumulative impact analysis in accordance with the
most recent DWQ policy. If you answered "no," provide a short narrative description.
4. Sewage Disposal (DWQ Requirement)
4a. Clearly detail the ultimate treatment methods and disposition (non -discharge or discharge) of wastewater generated from
the proposed project, or available capacity of the subject facility.
N/A — This pipeline maintenance project will not involve the generation of any wastewater necessitating a treatment
method.
Page 10 of 11
PCN Form — Version 1.3 December 10, 2008 Version
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or
❑ Yes ® No
habitat?
5b. Have you checked with the USFWS concerning Endangered Species Act
® Yes ❑ No
impacts?
❑ Raleigh
5c. If yes, indicate the USFWS Field Office you have contacted.
❑ Asheville
5d. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical
Habitat?
Potential species occurrences for Johnston County, North Carolina were reviewed from the USFWS ECOS website
(https://ecos.fws.gov/ecp/) prior to visiting the site. Also an official IPaC species list was requested for the project area
from the Asheville Field Office on 4/15/2020. Please see PCN Form Attachment B - IPaC Report.
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as essential fish habitat?
❑ Yes ® No
6b. What data sources did you use to determine whether your site would impact Essential Fish Habitat?
https://www.fisheries.noaa.gov/resource/map/essential-fish-habitat-mapper
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal
governments have designated as having historic or cultural preservation
❑ Yes ® No
status (e.g., National Historic Trust designation or properties significant in
North Carolina history and archaeology)?
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?
Site data collected. Please see PCN Form Attachment C - NRHP Map.
8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year floodplain?
❑ Yes ® No
8b. If yes, explain how project meets FEMA requirements:
8c. What source(s) did you use to make the floodplain determination?
Trey Trickett
6/4/2020
Date
Applicant/Agent's Signature
Applicant/Agent's Printed Name
(Agent's signature is valid only if an authorization letter from the applicant
is provided.)
Page 11 of 11
Base Map Source: ESRI Aerial Imagery 1:24,000 0 1,200 2,400 4,800 Feet
Colonial Pipeline Company, SE .1
Lines 23s and 24s Exposure � o r � I V FEMA/FIRM Map
Johnston County, North Carolina Project No. 02-041901
ECOLOGY GROUP
Base Map Source: ESRI Aerial Imagery 1:24,000 0 1,200 2,400 4,800 Feet
Colonial Pipeline Company, SE
Lines 23s and 24s Exposure O r I V NC HPO and NRHP Map
Johnston County, North Carolina Project No. 02-041901
ECOLOGY GROUP