20052070 Ver 1_More Info Received_20060214 (3)

Soil & Environmental Consultants, PA
Ilk 11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
Department of Environment and Natural Resources
Division of Water Quality
Attn: Cyndi Karoly
2321 Crabtree Boulevard
Suite 250
Raleigh, NC 27604
Re: Reply to the Division of Water Quality's Request for More Information
Weavers Pond Subdivision, DWQ # 05-2070
Zebulon, Wake County, NC
Dear Ms. Karoly: ?.
February 14, 2006
S&EC Project # 8713.W1
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The purpose of this letter is to respond to your November 22, 2005 letter requesting further information.
The original questions/requests are copied below as they appear on the 11/22/05 letter and are then
followed by our response to each.
Additional Information Requested:
1. Please indicate all stormwater outfalls on the site plan.
An overall stormwater site plan map is attached for your review. This site plan map includes all
stormwater outfalls proposed within the previously applied for Weavers Pond Subdivision.
2. Please indicate the diffuse flow provision measures on the site plan.
A stormwater plan with an overall stormwater plan map that provides diffuse flow is attached for you
review. This stormwater plan includes dry detention basins followed by level spreaders, timber weir wall
level spreaders and pre-formed scour holes all designed to meet the diffuse flow requirements. In
addition, level spreader worksheets, dry detention worksheets and 2 Operations & Maintenance
Agreements for level spreaders and dry detention basins are included.
3. The road crossing labeled as "Road D-Crossing #3 " on the plans does not appear to be
necessary. Please eliminate the road crossings orprovide additional information as to why
it is necessaryfor this project.
As stated within the Pre-Construction Notification Application, this road crossing is needed for internal
connectivity, to insure safety due to the number of lots served and to accommodate future development to
the northern portion of the property. As such, the applicant is now proposing to cross this feature with a
bottomless culvert and completely spanning both banks to avoid all stream impacts. In the original
application, USACE Stream Quality Assessment Worksheets and DWQ Stream Identification Forms
were completed and submitted, along with photo's of this. unimportant, intermittent stream to emphasize
Charlotte Office: Greensboro Office:
236 LePhillip Court, Suite C 3817-E Lawn-4ale Drive
Concord, NC 28025 Greensboro, NC 27455
Phone: [phone] Phone: [phone]
. -
the low quality of this agricultural feature and its existing riparian buffer. Attached are new impact maps
for Road D-Crossing #3 and photo's of the existing riparian buffer.
We hope that this answers all of the DWQ's questions in order to finish the final review process for a
401 Water Quality Certification. If you have any further questions or any additional explanation is
needed, please don't hesitate to call.
Sincerely,
Aaron Cooper
Environmental Scientist
Attachments:
1) Overall Stormwater Site Plan, sheets 1-6 (5 copies)
2) Overall Stormwater Site Plan, aerial photo (5 copies)
3) Stormwater and Erosion Control Calculations binder (includes level spreader & dry detention
worksheets) (5 copies)-
4) Level Spreader Operations & Maintenance Agreement, signed and sealed (5 copies)
5) Dry Detention Operations & Maintenance Agreement, signed and sealed (5 copies)
6) Revised Road D-Crossing #3 Impact Map & Vertical Cross-section
7) Photo's of stream and impact area for proposed Road D-Crossing #3 (5 copies)
8) Revised pages 3, 4, 5 & 8 of the PCN (5 copies)
CC: Michael Whitehead-MacGregor Development Co., 201 Shannon Oaks Circle, Cary, NC 27511
2
10. Describe the overall project in detail, including the type of equipment to be used: The
proposed project consists of the construction of a residential subdivision with typical utilities (i.e.
sewer, water). Typical construction and grading equipment will be utilized for this project
11. Explain the purpose of the proposed work: The purpose of the proposed project is to
develop a residential subdivision.
IV. Prior Project History
If jurisdictional determinations and/or permits have been requested and/or obtained for this
project (including all prior phases of the same subdivision) in the past, please explain. Include
the USACE Action ID Number, DWQ Project Number, application date, and date permits and
certifications were issued or withdrawn. Provide photocopies of previously issued permits,
certifications or other useful information. Describe previously approved wetland, stream and
buffer impacts, along with associated mitigation (where applicable). If this is a NCDOT project,
list and describe permits issued for prior segments of the same T.I.P. project, along with
construction schedules. S&EC conducted a preliminary wetland delineation followed by a
detailed wetland delineation and Neuse Buffer evaluation in April of 2004 Ms Jennifer
Burdette, formerly of the USACE, verified our delineation on November 30, 2004 A sign-off
map will be submitted at a later date. Mr. Michael Horan of the NC-DWQ conducted a site visit
to determine features subject to the Neuse Buffer Rules (NBRRO#04-0211 , letter is attached
No previous permits have been issued for the project.
V. Future Project Plans
Are any future permit requests anticipated for this project? If so, describe the anticipated work,
and provide justification for the exclusion of this work from the current application.
No future permit requests are anticipated for this project at this time.
VI. Proposed Impacts to Waters of the United States/Waters of the State
It is the applicant's (or agent's) responsibility to determine, delineate and map all impacts to
wetlands, open water, and stream channels associated with the project. Each impact must be
listed separately in the tables below (e.g., culvert installation should be listed separately from
riprap dissipater pads). Be sure to indicate if an impact is temporary. All proposed impacts,
permanent and temporary, must be listed, and must be labeled and clearly identifiable on an
accompanying site plan. All wetlands and waters, and all streams (intermittent and perennial)
should be shown on a delineation map, whether or not impacts are proposed to these systems.
Wetland and stream evaluation and delineation forms should be included as appropriate.
Photographs may be included at the applicant's discretion. If this proposed impact is strictly for
wetland or stream mitigation, list and describe the impact in Section VIII below. If additional
space is needed for listing or description, please attach a separate sheet.
1. Provide a written description of the proposed impacts: Permanent impacts associated
with road construction and widening include 0.15 acres of Zone 1 Neuse Buffer, 0.14 acres
of Zone 2 Neuse Buffer. Temporary impacts due to sanitary sewer line installation and
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additional access needed for the construction of the roads include 95 linear feet of stream
channel, 0.33 acres of Zone 1 Neuse Buffer, 0.19 acres of Zone 2 Neuse Buffer, .030 acres of
open water impacts and 0.396 acres of wetlands.
2. Individually list wetland impacts. Types of impacts include, but are not limited to
mechanized clearing, grading, fill, excavation, flooding, ditching/drainage, etc. For dams,
separately list impacts due to both structure and flooding.
Wetland Impact Type of Wetland Located within Distance to Area of

Site Number
Type of Impact
(e.g., forested, marsh,
100-year Nearest Impact
(indicate on map) herbaceous, bog, etc.) Floodplain Stream (acres)
es/no linear feet
Utility Impact Permanent
Headwater Forested
No
0 0.132
Map # 1 Temporary 0.264
Total Wetland Impact (acres) 0.396
3. List the total acreage (estimated) of all existing wetlands on the property: >0.5 acres
4. Individually list all intermittent and perennial stream impacts. Be sure to identify temporary
impacts. Stream impacts include, but are not limited to placement of fill or culverts, dam
construction, flooding, relocation, stabilization activities (e.g., cement walls, rip-rap, crib
walls, gabions, etc.), excavation, ditching/straightening, etc. If stream relocation is proposed,
plans and profiles showing the linear footprint for both the original and relocated streams
must be included. To calculate acreage, multiply length X width, then divide by 43,560.
Stream Impact
Perennial Average Impact Area of
Number Stream Name Type of Impact
t?
Intermittent?
Stream Width
Length
Impact
indicate on ma Before Impact linear feet acres
Utility Impact UT to Beverdam
Temporary
Perennial +/- 3'
31
0.002
Map #1 Crk
Utility Impact UT to Beverdam Temporary Perennial +/- 3' 34 0.002
Map #1 Crk
Utility Impact UT to Beverdam
Temporary
Perennial +/- 3'
30
0.002
Map #2 Crk
Total Stream Impact (by length and acreage) 95 0.006
5. Individually list all open water impacts (including lakes, ponds, estuaries, sounds, Atlantic
Ocean and any other water of the U.S.). Open water impacts include, but are not limited to
fill, excavation, dredging, flooding, drainage, bulkheads, etc.
Open Water Impact Name of Waterbody Type of Waterbody Area of
Site Number (if applicable) Type of Impact (lake, pond, estuary, sound, bay, Impact
indicate on ma ocean, etc. acres
Page 4 of 10
Crossing #1 N/A Road-temporary Pond 0.010
Crossing #1 N/A Utility-temporary Pond 0.020
Total Open Water Impact (acres) 0.030
6. List the cumulative impact to all Waters of the U.S. resulting from the project:
Stream Impact (acres): 0.006
Wetland Impact (acres): 0.396
Open Water Impact (acres): 0.030
Total Impact to Waters of the U.S. acres 0.432
Total Stream Impact (linear feet): 95
7. Isolated Waters
Do any isolated waters exist on the property? ? Yes ® No
Describe all impacts to isolated waters, and include the type of water (wetland or stream) and
the size of the proposed impact (acres or linear feet). Please note that this section only
applies to waters that have specifically been determined to be isolated by the USAGE.
N/A
8. Pond Creation
If construction of a pond is proposed, associated wetland and stream impacts should be
included above in the wetland and stream impact sections. Also, the proposed pond should
be described here and illustrated on any maps included with this application.
Pond to be created in (check all that apply): ? uplands ? stream ? wetlands
Describe the method of construction (e.g., dam/embankment, excavation, installation of
draw-down valve or spillway, etc.): N/A
Proposed use or purpose of pond (e.g., livestock watering, irrigation, aesthetic, trout pond,
local stormwater requirement, etc.): N/A
Current land use in the vicinity of the pond: N/A
Size of watershed draining to pond: N/A Expected pond surface area: N/A
VII. Impact Justification (Avoidance and Minimization)
Specifically describe measures taken to avoid the proposed impacts. It may be useful to provide
information related to site constraints such as topography, building ordinances, accessibility, and
financial viability of the project. The applicant may attach drawings of alternative, lower-impact
site layouts, and explain why these design options were not feasible. Also discuss how impacts
were minimized once the desired site plan was developed. If applicable, discuss construction
techniques to be followed during construction to reduce impacts.
The client reouested a preliminarv and detailed wetland delineation and Neuse Buffer
evaluation for the project prior to site plan development. The widening of Pippin Road
(Crossings 1 and 2) is necessary to accommodate the increased traffic in the area, however the
applicant has utilized the existing Right-Of-Way to widen the road so no new stream impacts are
proposed. Crossing 3 proposes to impact a ditched, intermittent stream within an agricultural
field (see attached USACE & DWO stream forms and photos). This crossing is needed for
internal connectivity, to insure safety due to the number of lots served and to accommodate
future development to the northern portion of the property. In addition, this is the only
Page 5 of 10
2. If "yes", identify the square feet and acreage of impact to each zone of the riparian buffers.
If buffer mitigation is required calculate the required amount of mitigation by applying the
buffer multipliers.
Zone* Crossing 1 Multiplier Required
(square feet Mitigation
1 273 perm
1,984 temp** 3 2 for Catawba)
( ) N/A
2 1,334 perm 1.5 N/A
641 temp
Total 1,607 perm 1.5 N/A
2,625 temp
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated.
Zone* Crossing 2 Multiplier Required
(square feet Mitigation
1 1,52 temp** 3 (2 for Catawba) N/A
2 835 perm 1.5 N/A
518 temp
Total 837 perm 1.5 N/A
2,036 temp
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated.
Zone* Crossing 3 Multiplier Required
(square feet Mitigation
1 6,310 perm 3 2 for Catawba)
( ) N/A
715 temp**
2 3,973 perm 1.5 N/A
452 temp
Total 10,283 perm 1.5 N/A
1,167 temp
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
** Temporary Zone 1 impacts will not be impervious, these areas will be re-vegetated.
Zone* 6 Utility Lines
(square feet Multiplier Required
Mitigation
1 10,409 3 (2 for Catawba) N/A
2 6,682 1.5 N/A
Total 17,091 1.5 N/A
* Zone 1 extends out 30 feet perpendicular from the top of the near bank of channel; Zone 2 extends an
additional 20 feet from the edge of Zone 1.
Page 8 of 10
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