20061617 Ver 3_Modifications_20080709

WITHERS ,: RAVENEL
ENGINEERS I PLANNERS I SURVEYORS
111 MacKenan Drive
Cary, North Carolina 27511
Tel.:[phone] Fax: [phone]
TO: NC-Division of Water Quality
2321 Crabtree Blvd.
Raleigh, NC 27604
WE ARE SENDING YOU
? Shop Drawings
® Copy of Letter
? Attached
® Prints
? Change order
LMER Old IJ AIJVC.l1VUM(i L
DATE July 9, 2008 Job No. 2050261.01
ATTENTION Cyndi Karoly
RE: Wendell Falls
OLA -i
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? Under separate cover via the following
? Plans ? Samples Specifications
? Diskette ?
COPIES DATE NO. DESCRIPTION
5 Wendell Falls - Request for Permit Modification
1 Check
THESE ARE TRANSMITTED as checked below:
? For approval ? Approved as submitted ? Resubmit copies for approval
® For your use ? Approved as noted ? Submit copies for distribution
® As requested ? Returned for corrections ? Return corrected prints
? For review and comment ?
? FOR BIDS DUE 20 ? PRINTS RETURNED AFTER LOAN TO US
REMARKS: Please call with any comments or concerns.
Received by:
COPY TO: File SIGNED: Todd PreuninMM (r-,->f?`I W 9 1`1
If enclosures are not as noted, kindly notify us at once. ? 2008
JUL 9
`-I? ::?,pi..,'/dATERµWA0R8RptlCN
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WITHERS L1' RAVEN EL
ENGINEERS I PLANNERS 1 SURVEYORS
July 9, 2008
US Army Corps of Engineers
Attn: Mr. Monte Matthews
NC-Division of Water Quality
Attn: Ms. Cyndi Karoly
3331 Heritage Trade Drive, Suite 105 2321 Crabtree Blvd.
Wake Forest, North Carolina 27587 Raleigh, North Carolina 27604 n?/7
Re: Wendell Falls - Request for Permit Modification k9 6Z, , ?_3 1 `eJ D
W&R Project Number: 2050261.o1
USACE AID#:2oo6-20100 JUL 9 2008
DWQ Project #: o6-1617
DENR -WATER QUAU IY
yyERWJDS AND STpRMWATER BRANCH
Dear Mr. Matthews and Ms. Karoly,
On behalf of Wendell Falls, LLC, we are
approval for impacts to jurisdictional
construction of a residential subdivision
applicant previously received for impact
determined that the impacts were in ex
history is described in detail below.
requesting a modification to the 404/401
waters and wetlands associated with the
and interchange. Please note that the
s, however, following installation, it was
cess of what was authorized. The project
Project History
Wetlands were delineated by Withers & Ravenel in the Fall of 2005 and the Spring of
2oo6. Site meetings were conducted with the USACE on August 8, 2oo6 (AID#:
2oo62oloo). The NC-DWQ conducted site meetings on 10/14/05, 11/17/05, 2/1/o6,
5/4/o6, and 9/2o/o6 to confirm our riparian buffer determinations (DWQ Project #:
05-270, 05-27oB, o6-122). In November 2007, Wendell Falls received approval from
the NC-DWQ and the USACE to impact 2,979 linear feet of perennial stream (2,354
linear feet permanent, 625 linear feet temporary impact), 3.24 acres of wetlands for
road construction, 2.39 acres of wetland for utility line installation, 0.2 acres of
wetlands for mechanized land clearing, and 9.52 acres of riparian buffers for road
construction, greenways, and utility line installation.
Installation of the culverts and the associated impacts for the interchange and the
early phases of the subdivision began in the Spring of 2oo8. During a site review by
the NCDOT and DWQ and during subsequent meetings with the USACE on May 16tH,
2008, it was determined that the impacts exceed what was permitted. Specifically,
there was temporary fill placed within wetlands, sewer lines had not been returned
to contour, silt fences within wetlands, and minor permanent fill outside of the
permitted area. Following this meeting, staff form Withers & Ravenel conducted as-
built surveys at the stream and wetland crossings to in order to quantify the impacts
and determine which areas were out of compliance. On June 13th, 2oo8 we received
a Notice of Violation from the USACE. The non-permitted impacts are described in
more detail below.
ill MacKenan Drive i Cary, NC 27511 1 tel: [phone] fax: [phone]oo8 i www.withersravenel.com
7040 Wrightsville Avenue i Suite 1o1 i Wilmington, NC 28403 1 tel: [phone] fax: [phone]
Brunswick Surveying 1 1027 Sabbath Home Rd, SW i Supply, NC 28462 1 tel: [phone] fax: 91o.842.8o19
We are requesting that an after-the-fact permit be issued to cover the additional
impacts and bring this project back into compliance. The impact totals are listed
below.
DOT Interchange and Parkway
Site 1 (NCDOT Site 11) - Due to a large rainfall event, erosion control devices were
overtopped and sediment was released into the DOT Mitigation/Enhancement site
and adjacent wetlands. The amount of sediment ranged from 2-12 inches and
covered an area of approximately 0.33 acres. The area was marked with orange
flagging and the sediment was removed by hand on 5/20/08 and 5/21/08. Work
was supervised by Withers & Ravenel wetland scientists.
In addition to the sediment, a temporary bridge across Mark's Creek was built for
construction traffic and clearing of the riparian buffers occurred outside of the permit
areas. The buffer impacts due to the construction of the temporary bridge consist of
0.04 acres (Z1:0.02 acres, Z2:0.02 acres). Approximately 0.04 acres of wetlands will
also be temporarily impacted for the bridge. Following construction, the wetlands
will be returned to contour and re-seeded with a wetland seed mixture.
Site 2 (NCDOT Site 11) - The approved impacts at this crossing consist of 0.94 acres
of riparian buffer (Z1:o.61, Z2:0.35), 249 linear feet of stream channel and 0.04 acres
of wetland fill. The actual impacts for this crossing are: Zone 1: 0.60, Zone 2: 0.34,
249 linear feet of stream, and 0.04 acres of wetland.
Site 3 - The approved impacts at this crossing are: Zone 1: 0.73 acres, Zone 2: 0.38
acres and 392 linear feet of perennial channel. The actual impacts are: Zone 1: 0.70
acres, Zone 2: 0.46 acres, and - 390 linear feet of perennial channel. Because the
actual impacts to Zone 2 exceed the permitted impacts by o.08 acres, the applicant
proposes mitigation, payable to the NC-EEP.
Site 4 - On May 20, 2008, accumulated sediment was removed from approximately
300 linear feet of stream channel in loop B (Sheet 7). In addition, based on field
data, it was determined that the permitted impacts were exceeded by the following
amounts: Zone 1: 0.06 acres, Zone 2: 0.03 acres, 15 linear feet of intermittent stream
channel.
Although permitted as an impact as part of the Highway 264 project, rip-rap was
placed in a jurisdictional ditch parallel to the Highway and a cross vane was
removed. Once the area has been stabilized, the applicant will remove the rip-rap
and replace the cross vane, as per NCDOT design standards. The applicant proposes
payment to the NCEEP to satisfy the mitigation requirements for the additional buffer
impacts.
Site 5 - No changes from original permit.
Site 6 - The riparian buffers were impacted by placement of the sediment fence just
outside of the existing toe-of-slope. The fence was installed to accommodate the
construction of the acceleration/deceleration lanes. The fence also resulted in
mechanized land clearing of 0.002 acres of wetlands. The approved impacts at this
site were: 0.03 acres of mechanized land clearing in a wetland and o.oi acres of
disturbance in Zone i of the riparian buffer. The actual impacts are: 0.0032 acres of
clearing in a wetland, Zone 1: o.o6 acres, and Zone 2: 0.04. The applicant proposes
buffer mitigation for the parallel buffer impacts depicted on Sheet 11.
Site 7 - Due to site constraints, additional buffer and stream impacts occurred at
Site 7. The permitted impacts consist of. 57 linear feet of stream channel, Zone 1:
o.o9 acres, Zone 2: 0.04. The actual impacts are: 127 linear feet of stream, Zone 1:
0.15 acres, and Zone 2: 0.05 acres. The applicant proposes payment to NCEEP for 70
linear feet of perennial channel to satisfy mitigation requirements.
Site 8 - No changes
Site 9 - The original plans called for extending culvert, but because of structural
issues, the entire culvert needed to be replaced, which increased the stream and
buffer impacts. The permitted impacts were: 13 linear feet of stream, Zone 1: o.ol
acres, and Zone 2: o.ol acres. The actual impacts are: 21 linear feet of stream
channel, Zone 1: 0.07, and Zone 2: 0.05 acres. In order to satisfy mitigation
requirements, the applicant proposes payment to EEP for 18 linear feet of perennial
channel.
Wendell Falls - Subdivision Impacts
Within the subdivision, there were two areas not in compliance with the permitted
impacts. Specifically, the stream/wetland crossings for the utility line installation
were not returned to grade, and approximately 0.02 acres of unauthorized wetland
fill was observed near the pump station (see pump station as-built). To bring the
sewer line back into compliance, the applicant removed -2.25 acres of fill material
and 6o feet of pipe. After the fill and pipe were removed, the areas were graded back
to the original contours. The applicant proposes payment to EEP to satisfy mitigation
requirements for 0.02 acres of wetland fill.
Crossing R-4
We have also included the as-built information for road crossing R-4. The actual
impacts are within the amounts permitted for the stream crossing, however, the
wetland impacts were 0.02 acres in excess of what was permitted at this site.
As part of this modification, we would also like to re-locate one of the sewer line
crossings (Impact Slo). The impacts for this sewer have not occurred. The revised
drawings are included with the attachments.
Impact Summary
Including the additional buffer, stream, and wetland impacts, the current request is
for:
Stream - Perennial - 2,442 LF (permanent) (88 additional feet over original permit)
Stream - Intermittent - 596 LF (Permanent) (15 additional feet)
Stream - Perennial - 625 LF (Temporary)
Wetlands - Permanent - 3.28 acres (0.04 acres additional)
Wetlands - Temporary - 2.39 acres (utility line installation)
Wetlands - Temporary - 0.242 (mechanized clearing and temp. fill) (0.042 over
original)
Open Water - Pond - 0.16 acres
Zone 1 Buffers - 224,770 SF (Permanent)
Zone 2 Buffers -140,670 SF (Permanent)
Zone 1 Buffers - 42, 689 SF (Temporary)
Zone 2 Buffers - 25,700 SF (Temporary)
Mitigation
As stated above the applicant proposes payment to EEP to satisfy mitigation
requirements for 88 linear feet of stream impact. and preservation for the additional
0.04 acres of wetland impacts over what was permitted. Mitigation will also be
required for approximately 0.03 acres (1,307 SO of Zone i and 0.13 acres (5,663 SO
of Zone 2 of the buffer. With the required multiplier, buffer mitigation is as follows:
Zone 1: 1,307 X 3 = 3,921 SF, Zone 2: 5,663 X 1.5 = 8,495 SF. A copy of our request
has been sent to EEP for approval.
Please feel free to call if you have questions or require additional information.
Sincerely,
WITHERS & RAVENEL, INC.
Todd Preuninger
Attachments -
1) Revised Impact Maps
NORTH CAROLINA

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WENDELL FALLS
DEVELOPMENT. LLC
WAKE COUNTY
PROJECT: LBG OR1012
WENDELL FALLS PARKWAY
FROM SR 2501
TO SR 1007
PERMIT MODIFICATION SHEET 1 OF 15 6/12/08
WETLAND LEGEND
- -wLB- - WETLAND BOUNDARY PROPOSED BRIDGE
WETLAND PROPOSED BOX CULVERT
® DENOTES FILL IN
WETLAND PROPOSED PIPE CULVERT
® DENOTES FILL IN
-? FLOW DIRECTION
TB
TB TOP OF BANK
- WE EDGE OF WATER
SURFACE WATER
® DENOTES FILL IN
SURFACE WATER
(POND)
T T DENOTES TEMPORARY
FILL IN WETLAND
DENOTES EXCAVATION
E E IN WETLAND
DENOTES TEMPORARY
TS TS FILL IN SURFACE
WATER
• DENOTES MECHANIZED
• • •• • • • CLEARING
----?--- PROP. LIMIT OF CUT
----f--- PROP. LIMIT OF FILL
-? PROP. RIGHT OF WAY
---NG--- NATURAL GROUND
- PROPERTY LINE
12'-48'
(DASHED LINES DENOTE PIPES
EXISTNG STRUCTURES) 54' PIPES
& ABOVE
0 SINGLE TREE
WOODS LINE
DRAINAGE INLET
ROOTWAD
RIP RAP
O ADJACENT PROPERTY OWNER
OR PARCEL NUMBER
IF AVAILABLE
PREFORMED SCOUR HOLE

LEVEL SPREADER (LS)
-TDE- TEMP. DRAINAGE
EASEMENT DITCH
- PDE - PERMANENT DRAINAGE GRASS SWALE
EASEMENT
--EAB-- EXIST. ENDANGERED
ANIMAL BOUNDARY
--EPB-- EXIST. ENDANGERED
PLANT BOUNDARY
--------- WATER SURFACE
x x x x x LIVE STAKES
x x x
BOULDER
--- COIR FIBER ROLLS
WENDELL FALLS
DEVELOPMENT, LLC
WAKE COUNTY
PROJECT: LBG OR1012
WENDELL FALLS PARKWAY
FROM SR 2501
TO SR 1007
SHEET 2 OF 15
SITE MAP

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ZONE 1 - - 2,259 SF (0.05 AC)
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ZONE 1 - -2,072 SF (0.05 AC) - --? `" STREAM: -•••-•••-•••-
LF - 33
ZONE 2 - ® -1,200 SF (0.03 AC)
-..._..._..AREA - 66 SF (0.002 AC)
STREAM:
LF - 30 GRAPHIC SCALE
50 0 25 50 100
AREA - 60 SF (0.001 AC)
1 inch = 50 ft.
WENDELL FALLS STREAM IMPACTS WITHERS &- RAVENEL
Sl ENGINEERS 1 PLANNERS 1 SURVEYOR[
Wendell North Carolina 1 11 S t O in n : a? ?a
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1 inch - 50 ft.
ZONE 1 - -10,390 SF (0.24 AC) -8,650 SF (0.20 AC)
ZONE 2 - ® - 5.574 SF (0.13 AC) -3,649 SF (0.08 AC)
STREAM:
LF - 150 147
AREA - 300 SF (0.007 AC) 294 SF (0.007 AC)
WETLANDS - E= 439 SF 0.01 AC 890 SF 0.02 AC
WENDELL FALLS STREAM IMPACTS WITHERS &- RAVENEL
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ZONE 2 - ® - 0 SF (0.00 AC)
STREAM:
LF - 0
AREA - 0 SF (0.000 AC)
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WENDELL FALLS
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STREAM IMPACTS
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a t N YY R =ROADWAY CROSSING ALL PERMANENT
G I - tll t. I' S= = SEWER CROSSING
U^ ~ G _ GREENWAY GROSSING IMPACTS ARE ON PERENNIAL STREAMS
E _ 0 FM _ FORCE MAIN 'CROSSING
v JUG 9 ~ D W =WATER LINE CROSSING
a eENR z~Q$ GRAPHIC SCALE
L W s,u~srr ~ &Aau~~. . PRRLIIMiN SRRQLA~YOUT sao o io sao ~ooo-
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3 0
N0. Date B Desi ner Scale Revision g
N KLJ 1" = 500'
0 Drawn By Date 0 WITHER R" E N E.L sheet No.
m DLP 01/17/2007 WENDELL FALLS OVERALL S N LL STREAM. IMPACT. MAP ENGINEERS I PLANNERS I SURVEYORS
Checked BY Job No. o NORTH CAROLINA 111 MacKenan Drive Cary, North Carolina 27511 tel: [phone] fax: [phone] www.withersravenel.com
o rP 02050261.01 WENDELL WAKE COUNTY
Y