20020468 Ver 1_NOV Response_20081030

Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
October 30, 2008
S&EC Project No. 3034.P1
©?- o4 LPS
Ms. Lauren Witherspoon Ms. Annette Lucas
NCDENR-DWQ NCDENR-DWQ
Raleigh Regional Office 401/Express Review Permitting Unit
3800 Barrett Drive 2321 Crabtree Blvd., Suite 250
Raleigh, NC 27609 Raleigh, NC 27604
Reference: Notice of Violation & Notice of Intent to Enforce Response
Brier Creek Country Club Phase 15-Land Bay JIM X01° F.a ;
NOV-2008-SS-0033
DWQ Project # 02-0468
Wake County, NC O C T 3 0 10118
Dear Ms. Witherspoon and Ms. Lucas:
WETLANDS AN0 STORdR`ddHi cR ?s UUe? rt
On behalf of Toll Brothers, Inc., Soil and Environmental Consultants, PA (S&EC) has been
contracted to assist with resolution of the alleged violations that were noted in the Notice of
Violation (NOV) dated September 24, 2008 and received on September 30, 2008 by Mr. Lee
Honeycutt. On October 3, 2008, representatives from Toll Brothers, Inc., S&EC and the John R.
McAdams Company, Inc. met at the Brier Creek Country Club-Phase 15 to observe the alleged
401 Water Quality Certification Condition, Neuse River Buffer Diffuse Flow and in-stream
sediment deposition violations noted in the NOV and to discuss potential resolutions. As a result
of this meeting, S&EC submitted a response to the September 24, 2008 NOV requesting an
onsite meeting with the Division of Water Quality (DWQ) and an extension of the detailed
responses to the alleged violations, however both requests were denied. Therefore, this letter will
respond to the specific violations listed below:
(1) 401 Water Quality Certification Condition
(11) Neuse River Riparian Buffer-Diffuse Flow
(III) Other Waste (In-stream sediment)
The remainder of this letter will respond to each response item individually, the original request
will be in italics followed by our response:
1. An explanation of why the conditions of the Approved 401 Water Quality Certification and
Buffer Rules Approval, DWQ Project # 02-0468, were not followed.
The DWQ Approval (DWQ #02-0468) includes the following condition:
An additional condition is that stormwater shall be directed to diffuse flow at
non-erosive velocities through the protected stream buffers. Before any of the
impacts approved herein are conducted, the final stormwater management
plan for the entire site must be submitted to this office.
As required, a stormwater management plan (SMP) was submitted to the DWQ on June 26,
2002. After two additional SMP submittals to the DWQ, and subsequent letters from DWQ
requesting more information, the DWQ approved a SMP submitted by John R. McAdams
Company on August 5, 2003 (see attached SMP submittals and approval).
As a result of this Approval, level spreaders were constructed at lots 738, 726 & 714.
Photographs verifying the construction of these level spreaders are attached for your
reference. Also attached are photographs documenting their current condition.
At a later date, modifications were made to these level spreaders. According to the project
engineer, the following summarizes these changes:
Lot 714:
Perhaps the most important items to mention with regards to this particular level spreader are
that a recently completed as-built survey (copy attached) verifies the following: 1) the
approved level spreader length of 45 LF matches what is constructed in the field; 2) the
downstream slope of the level spreader lip is approximately the same as what was originally
approved (3:1 H:V); and 3) the lip of the level spreader is level.
The most significant change between the previously approved plan and current field
conditions is that the level spreader section (i.e. the lip of the level spreader) for this
device was changed from an earthen berm to a Duraslot pipe (discussed further in the
response for Item 3) of the same length. In our opinion (McAdams), this field change
does not change the function or intent of the level spreader. We believe it will provide at
least 3 benefits:
1. The pre-fabricated system is much easier to make level than an earthen berm
2. The pre-fabricated system will resist erosion at the lip.
3. Taking into consideration the adjacent homes, a pre-fabricated device will be
more aesthetically pleasing.
Lot 726:
As with Lot 714, the noteworthy items to mention on this particular level spreader, as shown
on a recently completed as-built survey (copy attached), are: 1) the approved level spreader
length of 34 LF matches what is constructed in the field; 2) the downstream slope of the level
spreader lip is approximately the same as what was originally approved and 3) the lip of the
level spreader is level.
• The most significant change between the previously approved plan and current field
conditions is that the level spreader section (i.e. the lip of the level spreader) for this
device was changed from an earthen berm to a Duraslot pipe of the same length.
Lot 738
Though constructed as originally approved, this level spreader has gone through a number of
changes over the years in an attempt to address performance problems. A brief summary of
those changes is as follows:
As seen in the attached photographs from 2003, 2-ft tall masonry walls were constructed
as originally approved. However, they did not function properly.
To address the issue above, the 2-ft tall masonry walls were replaced with timber walls,
which were also an approved option by DWQ. For various reasons (i.e. actual site
topography, minimizing disturbance through the trees, etc.), the meandering outlines of
the walls shown on the approved plans were re-aligned to be linear. As can be seen on
the attached photographs from 2004, a ditch was constructed behind both walls during
initial construction of the timber walls. In its current state, the upper ditch has since been
replaced with a Duraslot pipe (discussed below) and the lower ditch has filled in with
natural debris since initial construction.
Page 2 of 6
• As with Lots 714 & 726, the most significant change to this particular level spreader was
the addition of a Duraslot pipe. However, in this instance, the Duraslot pipe was not
intended to serve as the level spreader lip. Instead, it was to function as a "flow
conveyance" mechanism" to distribute the flow along the length of the level spreader (i.e.
timber walls). The timber walls continue to serve as the lip of the level spreader.
2. Provide documentation of all jurisdictional features (e.g. streams, wetlands, and buffers),
including a DWQ buffer letter determination for the feature behind Lots 737 and 738 and at
the Sporting Club Drive culvert.
In 1998, S&EC conducted a detailed wetland delineation and Neuse River Buffer evaluation
for the 1,800 acre parcel located between Page Road, Globe Road, Aviation Parkway and
Hwy 70 near the Wake/Durham County line. On October 16, 1998, Mr. Eric Alsmeyer with the
US Army Corps of Engineers (USACE) verified the wetland boundaries of this 1,800 acre
parcel, see attached Notification of Jurisdictional Determination (AID 199506078).
Additionally, in November and December 1997, Mr. Danny Smith with the DWQ conducted
several site visits to make stream determinations on features potentially subject to the Neuse
River Buffer Rules. As a result of these site visits, a map was created that identifies all
streams and a pond within the 1,800 acres parcel that were determined by Mr. Smith to be
either subject or not subject to the Neuse Basin Buffer Rules. The attached June 12, 1998
Neuse River Basin Riparian Rules letter (NBR-RRO-20) and map verifies Mr. Smith's
determinations.
On October 21, 1998, a Pre-Construction Notification (PCN) Application was submitted to the
USACE and the DWQ by S&EC, on behalf of Toll Brothers, Inc., requesting the use of
Nationwide Permits (NWP) 12 & 26. This PCN Application proposed total impacts to 0.265
acres of wetlands (0.05 NWP 12 & 0.215 NWP 26), 0.009 of which was for the wetland
impacts associated with the construction of Sporting Club Way. On November 4, 1998, Toll
Brothers Inc. received written Approval from the DWQ for the use of Water Quality
Certifications (WQC) 3101 & 3108, which was followed by written verification for the use of
NWP 12 & 26, (AID# 199920085/199920086) on November 17, 1998, both approving 0.265
acres of wetland impacts.
On March 27, 2002, a subsequent PCN Application was submitted to the USACE and the
DWQ by S&EC, on behalf of Toll Brothers, Inc., requesting written concurrence for the use of
NWP 14 and corresponding WQC 3375. This PCN Application proposed an additional 0.010
acres of wetland impacts for the construction of Sporting Club Way. On May 9, 2002, Toll
Brothers Inc. received written verification for the use of NWP 14 (AID# 200220974), which
was followed by written approval from the DWQ for the use of WQC 3375 (DWQ# 02-0468)
on May 22, 2002, both approving 0.010 acres of wetland fill.
Therefore, regardless of what may be on the ground today, at the time of submittal and
approval on two separate occasions, the jurisdictional feature impacted for Sporting Club
Way was considered a wetland.
3. Please explain when you will be in compliance with our stormwater management plan as
approved by DWQ. You can only be compliant if the design of the level spreaders is what
was approved by DWQ in the stormwater management plan and they are providing diffuse
flow through the buffer.
As noted above, we believe that all three level spreaders were compliant at the time of their
installation and most recently the level spreaders behind lots 714 & 726 have been repaired
and are again in compliance with the DWQ approved stormwater management plan. Toll
Brothers, Inc. has been working diligently, along with their engineers to restore these two
level spreaders and find a solution for the level spreader behind lot 738. Therefore, below is
a list of steps that were taken to restore the function of the level spreaders behind lots 714 &
Page 3 of 6
726, while keeping the Duraslot pipe and a proposed alternative to the level spreader behind
lot 738:
Lot 714:
1. All tall vegetation (non-woody) was removed in the area surrounding the level spreader;
2. All natural debris (i.e. grass clippings, leaves, etc.) that concealed the level spreader was
removed;
3. The junction box and connector pipe was inspected for debris and clogging;
4. The interior of the Duralot pipe was flushed out to remove any natural debris, this
involved removing the end cap and using a power washer jetting out the entire length of
the pipe;
5. The lip of the level spreader was surveyed and an area between points B & C needed
correction. This area was corrected; the lip of the level spreader was then re-surveyed
and is now level throughout (see attached level spreader "as-builts").
6. The slope below the slot drain was scarified with rakes, seeded with fescue, and then
matted using staples to ensure no erosion until the slope has grown in sufficiently with
grass. The slope above the slot drain consists of a row of rip rap and junipers - this area
was weeded;
Lot 726:
1. All over grown vegetation was removed in the area surrounding the level spreader;
2. A large tree that had fallen years ago from a storm was cleared and branches were
removed from the level spreader area;
3. The junction box and connector pipe was inspected for debris and clogging;
4. Approximately 1-2 inch of natural debris that covered the top of the Duraslot pipe was
removed using hand labor and shovels therefore again exposing the entire length of the
duraslot pipe;
5. The interior of the Duralot pipe was flushed out to remove any natural debris, this
involved removing the end cap and using a power washer jetting out the entire length of
the pipe;
6. A small section of an area located just east of Point B of the level spreader was forming a
"valley", this area was re-graded and re-shaped to avoid future concentrated flow (see
attached level spreader "as-builts").
7. The slopes around the slot drain were scarified with rakes, seeded with fescue, and then
matted using staples to ensure no erosion until the slope has grown in sufficiently with
grass;
DURASLOT PIPE:
• To support the use of the Duraslot pipe in lieu of the previously approved earthen
berm, two attachments are included for your reference: 1) Level spreader
publication from "Urban Waterways" (note the picture on the 2"d page and
discussion on the 3`d page of the level spreader lip) and 2) publication from ADS
regarding the Duraslot pipe and level spreaders.
FUTURE MAINTENANCE:
Pursuant to a recorded covenant with the Brier Creek Country Club Home
Owners Association (HOA), the HOA is responsible for maintenance of storm
water features and drainage easements in the vicinity of the project lots. This
requirement includes maintenance of the level spreaders. Toll Brothers will offer
assistance to the HOA to develop a maintenance checklist for the level spreaders
and other storm water features in the community.
Page 4of6
Lot 738:
With regards to the level spreader behind lot 738, we would like to propose an alternative to
this previously constructed alternative nitrogen removal device. This "alternative" is
expanded upon in the attached memorandum from the project engineer dated October 30,
2008 and suggests a nutrient offset payment along with the removal of this level spreader.
This would allow the flow to continue to go down the already constructed bypass channel.
However, field modifications would be required in the bypass area to improve the stability of
the bypass channel and/or its rip-rap liner.
4. If you cannot achieve compliance then you will have to apply for a modification of the
stormwater management plan. This plan should be designed to insure that stormwater is
directed at diffuse flow at non-erosive velocities through the protected stream buffers. This
stormwater management plan must meet the current level spreader design requirements per
Chapter 8 of the most recent NCDENR stormwater BMP manual, available at:
http://h2o.enr.state.nc.us/su/bmp forms.htm. Per the BMP Manual, level spreaders may not
be installed on sites where flows are too high to be conveyed by a 130-foot level spreader of
the topography of the filter strip is too steep. Please see Section 8.3.6 of the BMP Manual for
allowable options if this is the case on the project site.
We believe that because the level spreaders behind lots 714 & 726 were previously approved
by the DWQ and the continued maintenance of these level spreaders should bring these
devices back into DWQ compliance, these level spreaders should be allowed to stay.
However, the issues associated with the level spreader behind lot 738 are not as easy to
correct. This is because of the following reasons: 1) This device was approved as "an
alternative nitrogen removal devise in lieu of providing diffuse flow though the buffer", as
stated in the April 25, 2003 letter from the DWQ. Therefore, this device was never intended
to meet the diffuse flow requirements; 2) There is no adjacent land or additional land besides
the existing easements to construct an alternative BMP; and 3) The existing topographic
constraints will not allow a level spreader to be designed/constructed that could meet the
current DWQ guidelines. Therefore, as summarized in the attached memorandum from the
project engineer, we are suggesting a nutrient offset payment along with the removal of this
level spreader as a replacement of this device.
5. A Stream Restoration Plan to address the sediment impacts to the stream. As a part of this
plan, you should provide the amount (depth) of material that has been deposited in the
stream. This information should be depicted on a map you provide. It is recommended that
you use hand labor (buckets, shovels and wheelbarrows) to remove deposited sediment from
the stream. The sediment should be removed from the stream, taken to high ground and
stabilized outside of the buffer. Also, the plan must address the measures that will be used
for temporary stabilization/sediment control while this work is under way.
On August 28, 2008 EcoEngineering, a Division of the John R. McAdams Company,
investigated the stream channel located behind Lot 738. The purpose of this evaluation was
to observe the sediment and to determine the source of the sediment impacts noted within
the NOV. Field observations indicated that the sediment within the stream channel is
potentially coming from multiple upstream sources which include but are not limited to an
adjacent stormwater pond outlet, erosional features along the banks of the stream channel
and a high density development to the north. For these reasons, Toll Brothers, Inc. does not
believe that the level spreader at Lot 738 is the primary source for sediment impacts within
the channel . However, in response to your concerns and to show good environmental
stewardship, Toll Brothers will provide a sediment clean-up plan in addition to providing the
services for the removal of the sediment from behind Lot 738 down to the culvert under
Sporting Club Drive.
Page 5 of 6
We anticipate that this addresses all of the DWQ's concerns. If you have any further questions or
any additional explanation is needed, please contact me at dedwards(a)sandec.com.
Sincerely,
Debbie Edwards
Environmental Specialist
Attachments:
1) 06/26/02-Stormwater Management Plan Submittal
2) 07/11/02-DWQ letter
3) 04/25/03-DWQ letter
4) 07/21/03-Stormwater Management Plan Submttal
5) 08/05/03-DWQ Stormwater Management Plan Approval
6) Photographs of the construction of level spreaders behind lots 738, 726 & 714
7) Photographs of the existing conditions of level spreaders behind lots 738, 726 & 714
8) Level Spreader as builts for Lot 714 & 726
9) Level spreader publication from "Urban Waterways"
10) Publication from ADS regarding the Duraslot pipe and level spreaders
11) Jurisdictional Determination 199506078
12) DWQ Buffer letter-NBR-RRO-20 & Map
13) Nationwide Permit AID# 199920085/199920086
14) Water Quality Certification Approval-DWQ#981052
15) Nationwide Permit AID# 200220974
16) Water Quality Certification Approval-DWQ#02-0468
17) Memorandum from project engineer-dated October 30, 2008
Cc: Mr. Lee Honeycutt - Toll Brothers, Inc.
Mr. Brandon Finch-John R. McAdams
Mr. John Hennessey-NPS Assistance and Compliance Oversight Unit
Page 6 of 6
FILE
•
Soil & Environmental Consultants, PA
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
www.SandEC.com
June 26, 2002
NCDENR - DWQ
Parkview Building
2321 Crabtree Boulevard, Ste. 250
Raleigh, North Carolina 27604
Attn: Mr. John Dorney
RE: Stormwater Management Plan
Brier Creek Golf Community (Country Club)
Land Bay J/M - Phase 15
Raleigh, Wake County, North Carolina
S&EC Project #: 97-3034
DWQ #: 02-0468
Dear Mr. Dorney:
593y Lb JM
S-W p/n Tr-,f n s
°624b2
Attached are the stormwater management plan and calculations for the velocity
dissipators shown on the plan for the Land Bay J/M project as requested in the 401 Water
Quality Certification and Neuse River Buffer Rules approval. The plan has been
designed by the John R. McAdams Company to direct stormwater to diffuse flow at non-
erosive velocities through the riparian buffers.
If you have any-questions, please feel free to call me at 846-5900 or Jon Moore of the
John R. McAdams Company directly at 361-5000.
Sincerely,
Jennifer A. Burdette
Environmental Scientist
Attachments
c: Lee Honeycutt - Toll Brothers, Inc.
Jon Moore - John R. McAdams Co.
Charlotte Office: Greensboro Office: Hickory Office:
PMB 291, 3020-I Prosperity Church Road 3817-E Lawndale Drive 910 Boston Road
Charlotte, NC 28269-7197 Greensboro, NC 27455 Taylorsville, NC 28681
Phone: [phone] Phone: [phone] Phone [phone]
Fax: [phone] Fax: [phone] Fax: [phone]
06/04/2002 TUE 12:50 FAX [phone] JOHN R MCADAMS
T01-99110, FES 1 & 11
NRCD Land Quality Section
Pipe Dewnn
Entering the following values will provide you with
the expected outlet velocity and depth of flow in a
pipe, assuming the Mannings roughness number is
constant over the entire length of the pipe.
10-year storm
flow Q in cfs : 48.34
slope S in % - 6.52
pipe diameter D in in_ : 36
Manning numbern : 0.013
Ffow depth (ft) = 1.09
Outlet velocity (fps) = 20.744
NRCD Land Quality Section
NYDOT Dissicator Design Results
Pipe diameter (ft) 3.0
Outlet velocity (fps) 20.744
Apron length (ft) 36.0
AVG DIAM STONE THICKNESS
(inches) CLASS (inches)
3 A 9
6 B 22
13 B or 1 22
23 2 27 e
CALCULATIONS:
Free Flow Conditium:
Width ^ La i Do
=36+3.0
39.0 J.
USE 39 ft
05/14/02
SUMMARY:
iYCDOT Class '2' Rip Rap
36 f, L x 39 ft. W x 27" Thk
NMON600"VI-) t ENGA-9P46D "PAS?)
Z002/006
(?? r2.14 - 0 -Z,
06/04/2002 TLTE 12:50 FAX [phone] JOHN R MCADAMS
Tot-99110, FES 1
NRCD Land Quality Section
Pipe Design
Entering the following values will provide you with
the expected outlet velocity and depth of flow in a
pipe, assuming the Mannings roughness number is
constant over the entire length of the pipe.
10-year storm
flow Q in Cfs : '19. 10, 414ow depth (ft) = 0.72
slope S in % : 6.52 Outlet velocity (fps) = 16.233
pipe diameter D in in.: 3o
Manning number n : 0.013
NRCD Land Quality Section
NYDOT Dissipator Design Results
Pipe diameter (ft) 2.5
Outlet velocity (fps) 16.23
Apron length (ft) 25.0
AVG DIAM STONE THICKNESS
(inches) CLASS (inches)
3 A 9
6 B 22
13 B or 1 22
o 23 2 27,,v
CALCULATIONS:
Free Flow Conditions: : ,....
Width = La +Do
= 25 + 2..i
- ?7.5 ft.
USE 28 ft
SUMMARY:
NCDOT Class 'j;' Rip Rap
25 ft. L x 28 ft. x 27" Thk
Z003/006
05114/02
C?JVWfia) 1-W5 TPPW
PAfiJ w1,114 T}tE ?%ES it
-- VA f2PaP Pte.

06/04/2002 TUE 12:51 FAX [phone] JOHN R MCADAMS
TOL-99110, FES 11
NRCD Land Quality Section
Pipe Design
Entering the following values will provide you with
the expected outlet velocity and depth of flow in a
pipe, assuming the Mannings roughness number is
constant over the entire length of the pipe.
10-year storm
flow Q in cfs : 29.24-
slope S in % : 1.50
pipe diameter D in in_ : 36
Manning number n _ 0.013
Flow depth (ft) = 1.24
Outlet velocity (fps) = 10.600
NRCD Land Quality Section
NYDOT DissPator Design Results
Pipe diameter ((t) 3.0
Oudet velocity (fps) 10.60
Apron length (ft) 24.0
A VG DIAM STONE THICKNESS
(inches) CLASS (inches)

3 -----
A ------------------
6 B 22
p13 Bor1 22«
23 2 27
CALCULATIONS.
Free Flow Conditions: "'-
Width = La +Do
=24+3.0
= 27 fi.
USE 27ft
12/09/01
NCDOT Clas,*' Rip Rap
24 ft. L x 27 ft x 27" Thk
Z004/006
??beTf--- 'fb Na
COxAB- NI/WICT -PA-p.
l?
06/04/2002 TUE 12:51 FAX [phone] JOHN R MCADAMS
TOL-99110, FES 35
NRCD Land Quality Section
Pipe Design
Entering the following values will provide you with
the expected outlet velocity and depth of flow in a
pipe, assuming the Mannings roughness number is
constant over the entire length of the pipe.
10-year storm
flow Q in cfs : 13.62 Flow depth (ft) = 0.60
slope S in % : 3-11 Outlet velocity (fps) = 17.338
pipe diameter D in in.: 24
Manning number n : 0.013
NRCD Land Quality Section
NYDOT Dissioator Desian Results
Pipe diameter (ft) 2.0
Outlet velocity (fps) 17.34
Apron length (ft) 20.00
AVG D1AM STONE THICKNESS
(inches) CLASS
- - --- ------- (inches)

3 A ------------------
9
6 B 22
13 8 or 1 22
„ 23 2 27 u
CALCULATIONS:
Free Flow Conditions:
Widih = La +Do
= 20 +2.0
= 22 ft
USE as ft.
12109/01
SUMMARY:
NCAOT Class '2' Rip Rap
20 ft.Lx22f..Wx27"Thk
Z005/006
06/04/2002 TUE 12:51 FAT 361 2269 JOHN R MCADAMS
TOL-99110, FES 47
NRCD Land Quality Section
Pipe Design
Entering the following values will provide you with
the expected outlet velocity and depth of flow in a
pipe, assuming the Mannings roughness number is
constant over the entire length of the pipe.
10-year storm
flow Q in cfs : 21.79 Flow depth (ft) = 0.82
slope S in % : 7.57 Outlet velocity (fps) = 18.063
pipe diameter D in in.: 24
Manning number n : 0.013
NRCD Land Quality Section
NYDOT Dissioator Design Results
Pipe diameter (ft) 2.0
Outlet velocity (fps) 18.06
Apron length (ft) 20.00
AVG DIAM STONE
(inches) CLASS
3 A
6 B
13 Bor1
n 23 2
CALCULATIONS:
THICKNESS
(inches)
-------- - ---
9
22
22
27
Free Flow Conditions.
Width = La +Do
=20+2,0
= 22 ft.
USE 22 ft:
12109/01
SUMMARY:
NCDOT Class 2 Rip Rap
12 ft. L x 22 ft. W x 27" Thk
U006/006
\o?CF w?JFgpG
I?
t uW? =f
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan Klimek, P.E., Director
Division of Water Quality
Mr. Lee Honeycutt
Toll Brothers, Inc.
2310 T.W. Alexander Drive, Suite G
Raleigh, NC 27617
Dear Mr. Honeycutt:
July 11, 2002
i
JUL 16
i
3L ?L?'
Subject: Stormwater Management Plan
Brier Creek Country Club, Phase 15
Wake County, NC
DWQ# 020468
This Office is in receipt of the plans dated June 20, 2002 for the stormwater management plans at the
subject facility prepared on your behalf by The John R. McAdams Company and submitted to the Division on
June 26, 2002. As specified in the 401 Water Quality Certification, dated May 21, 2002, and in 15 A NCAC 02B
.0232(5) diffuse flow must be maintained in the buffers. Staff from the Wetlands Unit reviewed the plans and
found potential violations of the Certification and Neuse Buffer Rules.
The stormwater discharges just north of the intersection of Sporting Club Drive and Road S-39 indicate
that diffuse flow through the entire buffer will not be achieved by design. Also, based on the information
provided for the other outlets, it is not clear that diffuse flow will be maintained through the entire buffer at non-
erosive velocities. Insufficient information was provided to show that the flows from these dissapators would be
diffuse and would not be erosive through the entire buffer.
If you have any questions regarding this matter, please contact Mr. Todd St. John at [phone].
303 ? LA -)M
0711o.2 SW p1h
upervi or
Lfr
rUn*
cc: Mr. Todd St. John, Wetlands Raleigh Regional Offic
e
Jennifer Burdette, S&EC, 11010 Raven Ridge Road, Raleigh, NC 27614
File
?uvaivuua vrvjsiun ui vvarer 1. uawy, 4V1 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree blvd., Raleigh, NC 27604-2260 (Location)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/
11 ar?9Q?
O <'
Ms. Erika Hanson, PE
The John R. McAdams Co.
PO Box 14005
RTP, NC 27604-2260
Dear Ms. Hanson:
April 25, 2003
;i
L
APR 2 9 2003
I -FbL -.CP I--(
n _
Subject: Stormwater Management Plan
Brier Creek Country Club, Phase 15
Wake County, NC
DW Q# 020468
This Office is in receipt of the plans dated April 11, 2003 for the stormwater management plans at the
subject facility. The stormwater discharge just north of the intersection of Sporting Club Drive an Road S-39
proposes an alternative nitrogen removal device in lieu of providing diffuse flow through the bu it However,
the drainage feature that it will discharge to is less than 50 feet away from the level spreader. As such, the
level spreader must be moved to provide at least 50 feet of forested filter strip before this Office can approve
the measure. Also, the discharge from the level spreader must be hydraulically independent of the bypass
discharge.
If you have any questions regarding this matter, please contact me at [phone].
Sinc el ,
Tod St. John PE
cc: Raleigh Regional Office
Jennifer Burdette, S&EC, 11010 Raven Ridge Road, Raleigh, NC 27614
File
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan Klimek, P.E., Director
Division of Water Quality
North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
919-733-1786 (phone), 919-733-6693 (fax), http://h2o.enr.state.nc.us/ncwetlands/
oa-,D114-to$
TBE JOHN R MCADAMS COMPANY, INC.
FACSIMILE TRANSMITTAL
TO:
TO:
TO:
TO:
TO:
Mr. Todd St. John
Fax No: [phone]
Fax No:
Fax No:
Fax No:
Fax No:
FROM: Brandon R. Finch, PE
PROJECT: Brier Creek, Land Bay J/M
JOB NO: TOL-99110
DATE: July 21, 2003
Hard Copy To Be Mailed?: ? Yes ® No
REMARKS:
NO. OF PAGES: 16
(including cover)
Todd, Please find attached the layout and details for the three areas in Land Bay J that
need to be constructed to conform to DWQ regulations.
CC: Fax No:
CC: Fax No:
NOTE: If the following information is not clear or if you do not receive all of the indicated
sheets, please notify our office immediately at [phone]. Thank you.
FOR INTERNAL USE ONLY
? Copy Facsimile Transmittal Only to File
® Copy Entire Document to File
FAXING COMPLETE Date: Initials
? MAILING COMPLETE Date
Initials
CIVIL ENGINEERING . LAND PLANNING • SURVEYING
PO Box 14005 . Research Triangle Park, NC 27709 • [phone] . fax[phone]
www.johnrmcadams.com
LEVEL SPREADER WALLS
WITHIN LOT 736-738
(STANDARD JB 12 & WIER JBW 12D)
NOTES: \
1. MEANDER WALLS THROUGH TREES TO MINIMIZE DISTURBANCE. 10
2. NO TREES ARE TO BE REMOVED ON LOT 738.
3. GAP MASONRY WALLS OR DRILL TIMBER WALLS TO PROVIDE
LEVEL DRAINAGE WITHIN THE WESTERN 9OLF OF WALLS.
O
(D . \.
\\ 1LFt TI R ( AA N
\ ?\ BASE VA 0 64, 0
i -? - f `- 51 27 rH
1?EMOVE ND 1
IN T11? J EN
f OF EX.?AI E
J 12
I
v-- - - 366.7
.. \ B 2D I L6'-Z?P
_ 15LF 12"PVC ® 1'0
1,00% J
6C7`t -T+MBER-_OR MASON Y ALL \ WRA CMP JOINTS THI 1
BASE LEVATION @6 50LF l STREAM OF
\ UNCTION BO TH
MPRENE COLLAR
:fl n APPROXIM TE OC N OF
PROPOSED PE SP CE 16-T
P OPE TY LIN \
= 12D 50
Q 7 = 38 JB
WIV IN=365.k5( 36"
1 / 41 S F IN IN=365.(30)') I B 1-- 1' ?•
366.90 (12") RIM=370.00
ST=368.65 SEX INV IN=365.87 (36") _
EE365.50 36" IN` -OUT=365.85
0 T
6--?, 32 S I ,
F 25)11'8
.GF=387.0 \ \ I ? ? F
- I
\ FF \387.0
F= 890
\ GF= 87.0\ i
PROJECT NO. TOL-99110
BRIER CREEK THE JOHN R. McADAMS
F` 07" E03TIMBERWALLS.DWG COMPANY, INC.
a SCALE: 1 •_30, LEVEL SPREADER WALLS ENGINEERS/PLANNERS/SURVEYORS
? RESEARCH TRIANGLE PARK, NC
(n DATE: 07-15-03 LAND I'SAlf J P.O. BOX 14005 ZIP 27709-4005
RALEIGH, NORTH CAROLINA [phone]
NFOR COST ESTIMATE
RPOSES ONLY.
TO LEVEL SPREADER
PLAN VIEW
'NOTE: INTERNAL W DETERMINED PRECST STRUCTUURALL CONCRETE BLOCK AS DESIGNED ENGINEER.
NCTI
M
NTS
LIFT HOOKS
3'-6"
ADJUST TO TOP
OF BRICK
1/2" PLASTER-
8" MINIMUM ; OVER'
8' DEEP, 12" MINIMUM
UP TO 6' FROM TOP
OF CURB.
3000 PSI CONCRETE
00
I I I I
00
6" °,° -1. CLASS. A" CONCRETC
2'- 0"
2 MIN.
3" MAX.
NO. 3 REBAR S" O.C.
PLACED BOTH WAYS
Z
I
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+
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•I
° a ° ? • O • e • a ° a Cfl
4'- 4"
i
I I
4'- 4"
NOTES:
1) FOR 24" RCP & LARGER USE PIPE
DIAMETER PLUS 12" FOR
MINIMUM INSIDE DIMENSION.
2) USE 4X4X8 OR 4X8X16 SOLID
CONCRETE BLOCK. CAST IN PLACE
OR PRECAST CONCRETE TO MEET
NCDOT STANDARDS ACCEPTABLE.
3) FOR STEP REQUIREMENT SEE NOTE
2 ON STD. NO. 30.01.
- DRAWING NOT TO SCALE -
1 - 3'-0" _-;
25-1/2-
1 OC CORRUGATED BAND
5x1 ALUMINIZED STEEL
TYPE 2 CMP
12" WIDE NEOPRENE FLAT GASKET
BETWEEN PIPE AND BAND
112" DIA. BOLT
(2) 24" ANGLES
==-NEOPRENE COLLAR DETA4t=- -_------
r.i 1-c
25-1
1
?-? 24'

1

Lo ?S ?3?-?13?3

??t- S4e?1Dr 2 AL?Q?A ` ??
n)t5
Z CREEK COUNMY CLUB
?LOT'S 736-_738
DIRA i
TDn u iy j }.q
V1, 11I L-v 11\1 1-., !AA VV1 -v: vVs- !N rtv-r"u,
• WJ VVLi VVL
LEVEL SPREADER WALLS
WITHIN LOT 26
(WIER JBW 35A)
® PROlBCf xo. TOL-99110 BRIER CREEK THE JOHN R. McADAMS?
COM
INC
19 TOL99110-E8 PANY,
.

1 ^_? WEIP. R?i :. X WTBW Q5, AI
i Iv ?F Excuffa S/PLAxxm/sumYORS
RESEARCH TRIANGLE PARK, NC
RALEIGH= NORM CAROLINA I P.O. BOX 14005 ZIP 27709-4005
ueTe
11-14-2002 (910) set-5000
e '--) -1-1
I
STANDARD MANHOLE LID Xw"
TOP TO READ "STORM" ?i i "
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PURPOSES ONLY.
NIGN?
JUnICTI(?ln? VI iniT?ppnini
R/lV U11I IIV I ERNAL
On V rvi i iiv I ERNAL \
u,r,n / .n,., ?
WEIR jE9Vy 355 47q
4vEIR JESVV JSH dC 4%H

NTS
)
4' MIN. 6"
I
F( OW
1 V MIN.
2.5 MAX.
2.5 MAX.
NORTH AMERICAN S75 BN
MATTING OR ENGINEER
APPROVED EQUAL
FLOW
FLOW

FLOW
0
w
t-
z
w
U ?
z
o°
v?
RTES:
THE MATTING SHOULD BE MINIMUM OF 4' WIDE EXTENDING 6" OVER THE LIP AND BURIED 6" DEEP IN A VERTICAL TRENCH ON
IE LOWER EDGE. THE UPPER EDGE SHOULD BUTT AGAINST SMOOTHLY CUT SOD AND BE SECURELY HELD IN PLACE WITH
.OSELY SPACED HEAVY DUTY WIRE STAPLES AT LEAST 12" LONG.
ENSURE THAT THE SPREADER LIP IS LEVEL FOR UNIFORM SPREADING OF STORM RUNOFF.
CONSTRUCT THE LEVEL SPREADER ON UNDISTURBED SOIL (NOT ON FILL).
DISPERSE RUNOFF FROM THE SPREADER ACROSS A PROPERLY STABILIZED SLOPE NOT TO EXCEED 10%. MAKE SURE THE
OPE IS SUFFICIENTLY SMOOTH TO KEEP FLOW FROM CONCENTRATING.
IMMEDIATELY AFTER ITS CONSTRUCTION, APPROPRIATELY SEED AND MULCH THE ENTIRE DISTURBED AREA OF THE SPREADER-
LEVEL SPREADER T YPiCAL SECTION
N TS
LEVEL SPREADER WALLS
WITHIN LOT 714
(WIER JBW 47A)
0
j i 20' PP 'l T? S R
DRAINGE? EAS M I
JBW 47A
(JUNCTION BOX WITH INTERNAL
RIM = V. IN 343.00
/ DUJ
SIN UT = 339.50 (8" PVC)
/ A ? INV. UT = 339.40 (24" FES)\ N TE: AIDITIONAL GRADING
/ May BE CESSARY TO
O STRUCT THE LEVEL
I P FADER P?QPERLY AND
/ R? ND THE HIGH SIDE OF
E JUNCTION X.
may,
GRAPHIC SCALE \
30 0 15 30 60 \ \
1 inch = 30 ft. J \

lit
I
M
?T

T ESTIMA
S ONLY.
® PR07BCI N0. BR THE JOHN R. McADAMS
K TOL99110-E3 IER CREEK NO
COMPANY, INC.
1?_?. WEIR BOX (JBW 47A) BNGINBSRB/PLANNis'EiS/SURM0RS
R6SnM TRWNGIE PARK
NC

N
DATE: 1-14-2002 T i)(
GH? NORM A ,

P.O. BOX 14005 ZIP 27709-4005

STANDARD MANi;GLE uU
TOP TO REED "STo'pm-
#4
? RNs p?qc
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e,
N0frs
STep.
(NaTE tR
S,pE
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2 5?)
Pic (T f.)
SM
5Y?
fl(( wvrti %u r
ZS ?EgljMg1 FIB ?q EFOR COST ESTIMATE
® oP,l
E0 12?r l( POS ES ONLY
Y.
JUNCTION BOX WITH INTERNAL WEIR JBW 35A1 & 47A
NTS

I 4' MIN. 6"
_ "'t 0 IV
1 ? 1' MIN.
2.5 MAX.
2.5 MAX.
NORTH AMERICAN S75 BN
MATTING OR ENGINEER
APPROVED EQUAL
FLOW
FLOW
FLOW
w
z
w
o y?
ZO
J
O
OTES:
THE MATTING SHOULD BE MINIMUM OF 4' WIDE EXTENDING 6" OVER THE LIP AND BURIED 6" DEEP IN A VERTICAL TRENCH ON
iE LOWER EDGE. THE UPPER EDGE SHOULD BUTT AGAINST SMOOTHLY CUT SOD AND BE SECURELY HELD IN PLACE WITH
_OSELY SPACED HEAVY DUTY WIRE STAPLES AT LEAST 12" LONG.
ENSURE THAT THE SPREADER LIP IS LEVEL FOR UNIFORM SPREADING OF STORM RUNOFF.
CONSTRUCT THE LEVEL SPREADER ON UNDISTURBED SOIL (NOT ON FILL).
DISPERSE RUNOFF FROM THE SPREADER ACROSS A PROPERLY STABILIZED SLOPE NOT TO EXCEED 10%. MAKE SURE THE
.OPE IS SUFFICIENTLY SMOOTH TO KEEP FLOW FROM CONCENTRATING.
IMMEDIATELY AFTER ITS CONSTRUCTION, APPROPRIATELY SEED AND MULCH THE ENTIRE DISTURBED AREA OF THE SPREADER.
LEVEL SPREADER TYPICAL SECTION
N TS
•
Soil & Environmental Consultants, Inc.
214 West M111hrook Road ¦ Kaleigh, North Carolina 27609 E [phone] K Fax [phone]

ez? G%tr? Z- /'t- `??ttJ--; ,-o-
7j . Axyy-K -- %cl- o
Transmittal
36A?
Project #: 9 ?- 5'03G/ Date: /z/
Project Name: 621(+x2 R&Zsx
1/4,'04it/ &-/r '- Aeit) File:
We Transmit to you Herewith:
Under Separate Cover:
Drawings X For your information and files By mail
Specifications X For comment or approval By courier
Brochures or photos Returned for correction, resubmit By express
Correspondence Approved as noted
No. Copies Document No. Date Description

1? J _CV ??Gt K(?/}(? Itu?Zt/ ?cl,?G _ ?I

R,ernarks: l k l'e'nd) 1-" 7'i?GS dtkwUS l • 91,6:oU 1?"'z74e */ ?i?,?GU?
T-kF A 70A61727-11 K?(JOC-r ry (25
k 4e &176 H , m-,M-Ot- CG • of l(f
if enclosures are not as listed as above, kindly notify us at once.
By:

Soil%Sitt' F%';IIU:111On N Mapping and Physical Analysis K Wetlands Mapping and Miligation E Envlronnlcntsll Au,
On-Sit(' \MlStC TrC:Itillcnt Systems, L'valtlntion atld DCSIgn
i
Soil & Environmental Consultants, Inc.
244 West Millhrook Road ¦ Ittaleigh, North Carolina 27609 ¦ [phone] ¦ Fax [phone]
December 30, 1997
Project # 97-3034
N.C. Division of Water Quality - DEHNR
Attn: Mr. Danny Smith
3800 Barrett Drive, Suite 101
Raleigh, NC 27609
919-571-4700 (office)
919-571-4718 (fax)
cc: Steve Davenport / AAC
Charlie Wanta / Toll Brothers, Raleigh
T.J. Pecorack / Toll Brothers, Charlotte
Harlan Britt / Kimley Horn, Raleigh
Re: Neuse River Basin Nutrient Sensitive Waters Riparian Buffers
Briar Creek (formerly knovm as RDU Assemblage), Raleigh, Wake County, N.C.
Dear Mr. Smith:
Personnel from Soil & Environmental Consultants, Inc. and the N.C. Division of Water Quality
(DWQ) revicNved the project site known as Briar Creek on several different occasions during
November and December of 1997 to determine the extent of regulation by the Neuse River Basil
Nutrient Sensitive Waters (NRB.NSW) riparian buffers.
Included is the final map generated by S&EC, Inc. indicating the extent of regulation by the
NRB.NSW riparian buffers for the Briar Creek project. The information on this map will be
presumed accurate unless S&EC, Inc. receives a response stating otherwise by the DWQ within a
reasonable time span. (S&EC, Inc. believes that a "reasonable time span" should not oxceed 10
working days.) Our client intends to utilize this information in developing a site plan for the
project. Obviously, if the map is not confirmed, any planning could be a waste of time and money.
Please call Kevin Martin or myself if you have any questions, comments or require further
explanation. Thank you for your cooperation so far.
Sincerely,
Bob Zarzecki
Biologist
Soil/Site Evaluation t Mapping and Physical Analysis ¦ Wetlands Mapping and Mitigation ¦ Environmental Audits
On-Site Waste Treatment Systems, Evaluation and Design

3i NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AMID NATURAL RESOURCES
RALEIGH REGIONAL OFFICE
D-Wo
June 12, 1998
9. HUNT,JR.
NOR Bob Zarzecki
Soil & Environmental Consultants, inc.
244 West Millbrook Road
Raleigh, North Carolina 27609
: MGDEYITT• .. ,
TARY
... :etc
;Subject: Neuse River Basin Riparian Rules
I,? z NBR-RRO-20
Wake County
Dear Mr.Zarzecki:
On several occasions during November and December of 1997 I met with personnel
' from Soil and Environmental Consultants, Inc. at the proposed development/project;
_1 known as Briar Creek in Wake County. At your request, an evaluation was performed
to determine whether the site would require compliance with the Neuse River Buffer
Requirements. There are streams and a pond on the property which is subject to the
Neuse Buffer Rule. The map you provided indicates the streams, and the pond that are
f subject to the rule. (see attached map). E:
If you have any questions please call me at (919) 5714700.
Yf I:
erely,
1lI ??' Danny Smi ' F
Environ ental Specialist
cc: RRO - file copy
wetlands group-John Dorney
_ ,: ?•<?
K?
.?'•:i (1
3800 BARRETT DRIVE, SUITE 101, RALEIGH, NORTH CAROLINA 27609 1
'?'='•il .. :z.'(.Y?` PHONE [phone] FAX [phone]
-•;? ?r;*?I.e„-: AN EgUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER - SOX RECYCLED/10% POST-CONSUMER PAPER
1o?Cr V.' `'r9pG
r
O 115? `C
Mr. Lee Honeycutt
Toll Brothers, Inc.
2310 T.W. Alexander Drive, Suite G
Raleigh, NC 27617
Dear Mr. Honeycutt:
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan Klimek, P.E., Director
Division of Water Quality
August 5, 2002
Subject: Stormwater Management Plan
Brier Creek Country Club, Phase 15
Wake County, NC
DW Q# 020468
This Office is in receipt of the plans dated July 21, 2003 and modified August 1, 2003 for the level
spreaders with bypasses at the subject facility prepared on your behalf by The John R. McAdams Company
and submitted to the Division on August 4, 2003. Staff from the Wetlands Unit reviewed the plans and found
them acceptable. Please note that this approval is for water quality purposes only and shall not be construed
as an approval of the design for dam/outlet structure integrity, Dam Safety, public safety, or flood attenuation
purposes. This Approval hereby also serves as a Minor Variance Approval from the Neuse Buffer Rules for
the level spreaders in zone 2 of the buffer behind lot 738.
If you have any questions regarding this matter, please contact Mr. Todd St. John at [phone].
S
J rnd-s Do ey
etl Unit Su rv' or
cc: Mr. Todd St. John, Wetlands
Raleigh Regional Office
Brandon Finch, PE, The John R. McAdams Co., PO Box 14005, RTP, NC 27604-2260
Jennifer Burdette, S&EC, 11010 Raven Ridge Road, Raleigh, NC 27614
File
North Carolina Division of Water Quality, 401 Wetlands Certification Unit,
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree- Blvd, Raleigh, NC 27604-2260 (L ocatinn)
919-733-1786 (phone), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetlands/
pa- o? 600

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CONSTRUCTION OF LEVEL SPREADER BEHIND LOT 714-FEBRUARY 2004
}
? ? rN

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4 .? _.?.w.•w•. L'l
SPLITTER BOX AND LEVEL SPREADER BEHIND LOT 714-FEBRUARY 2004
t~
7t

s; #

:. 4+t, y{y
mot.. °'H+ _??ani ?'f!?? T'. ? rx;•PF
POST RESTORATION OF LEVEL SPREADER BEHIND LOT 714-OCTOBER 2008
SPUTTER BOX AND LEVEL SPREADER BEHIND LOT 726-FEBRUARY 2004

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CONSTRUCTION OF LEVEL SPREADER BEHIND LOT 726-FEBRUARY 2004
y
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POST RESTORATION OF LEVEL SPREADER BEHIND LOT 726-OCTOBER 2008
ORIGINAL MASONRY WALL LEVEL SPREADER (FAILING) BEHIND LOT 738-2003
ORIGINAL "UNLEVEL" MASONRY WALL LEVEL SPREADER BEHIND LOT 738-2003

.1 _ .: y _.Y - our ? .. ??r^'""'' ? _.u . •t; , ? s r "? Yd:- , x
R 3.?.
CONSTRUCTION OF TIMBER WALL LEVEL SPREADER BEHIND LOT 738-FEBRUARY 2004

PROFILE OF TIMBER WALL LEVEL SPREADER & REMNANT OF MASONRY WALL BEHIND
LOT 738-FEB 2004

SLOT DRAIN END CAP BEHIND TIMBER WALL LEI
BEHIND LOT 738-OCTOBER 2008
CURRENT CONDITION OF LEVEL SPREADER BEHIND LOT 738-OCTOBER 2008
PROJECT
LOCATIDI
TV ALCXANOCR pp/VE
341.(
340.
LOT 714

A. 341.00
340.9.`
(":,340.99
i
[): 341.00
E : 340.99
1-: 340.97

UTILITY LEGEND
EASEMENT LINE
EXISTING PIPE
PROPOSED PIPE
+ TOPO SPOT ELEV
INV.IN?339.67 24" RCP
N V OU T= 339.57 8"
INV OUT=339.47 24" RCP
24" WEIR=344.67
-S=:539.1
FOP=345.67
8,F VC -I
J
?341.00
is \.34Q.23
B
341.25 4
\ 340.9
341.16 -
\41.00
341.04
3409
3 0.9
GRAPHIC SCALE
,o o s , so
1 341.29
I inch - to ft. 340.9
G
3
31
3
38.50
E .42
\ 338.58
0.55
39.21
0. 8
3,38. 86
0.52
339.
PROJECT No. TOL-99110 LAND BAY J ATHE JOHN R. McADAMS
FIELD CHECK COMPANY, INC.
a LENANB:
ENGINEERS/PLANNERS/SURVEYORS
SCA1.6: , -e, a? LEVEL SPREADER AS-BUILT
RESEARCH TRIANGLE PARK, NC
RALEIGH, NORTH CAROLINA P.O. BOX 14005 ZIP 27709-4005
DATE` 10-23-08
[phone]
4 I DoT X26
Gs
N.T3.
350.47G? 350.19
_VLL SPREADFR: -I-3 9.75
350.45 350.48 F 35 .45
J:350.45 + +
350.47 349.64
350.47 350.48E +50.32
: 350.48 34 .87
: 350.48 F i 50.49 350.47? 350. ?
c': 350.47 + rf
50.02
350.47C 350.3
3 0.13
350.45B 350.3+
35 .21
350.5+7
,._- -- --350.45 A 350,21
TOP=354.9)
INV.IN-351.22 24" F?CF F
INV OUT=351.42 8"
INV OUT=351.12 ?A' RC;F'
WF I R= 3 5 3.9 2 UTILITY LEGEND
- - - - - EASEMENT LINE
EXISTING PIPE
o PROPOSED PIPE
e C\? + TOPO SPOT ELEV
GRAPHIC SCALE
10 o s 10 J20
iiij
1 Inch s 10 R.
PROJECT NO. T0L-99110 LAND BAY J 11
THE JOHN R. McADAMS
ALE " FIELD CHECK D?j?? T COMPANY, INC.
>. SCALE: 1»_10' LEVEL SPREADER AS-BUILT ENGINEERS/PLANNERS/SURVEYORS
RALEIGH, NORTH CAROLINA P.O.EBOX 14005 OZ P E 709-4005
DATE: 10-23-08
[phone]
D I- Dv+ to%
Distributed in furtherance
of the acts of Congress of
May 8 and June 30,1914.
North Carolina State Uni-
versity and North Carolina
A&T State University commit
themselves to positive action
to secure equal opportu-
nity regardless of race, color,
creed, national origin,reli-
gion, sexage, or disability. In
addition, the two Universities
welcome all persons without
regard to sexual orientation.
North Carolina State Univer-
sity, North Carolina A&T State
University, U.S. Department
of Agriculture, and local gov-
ernments cooperating.
Level Spreaders: Overview, Design,
and Maintenance
Level spreaders are stormwater structures that can support the filter-
ing action of riparian buffers if designed and installed properly.
This publication presents the latest
research findings on level spread-
ers in North Carolina and describes
recommended practices for design-
ing, installing, and maintaining these
structures.
Since 1998, North Carolina has
implemented rules to protect riparian
buffers in several major river basins.
These rules require that concentrated
stormwater runoff be diffused, or
spread, prior to discharge into a ripar-
ian area. To accomplish this, the Divi-
sion of Water Quality (DWQ) in the
N.C. Department of Environment and
Natural Resources (NCDENR) recom-
mended the use of level spreaders and
developed initial design standards in
October 2001. An overview of level
spreaders and'riparian buffers can be
found in Urban Stormwater Structural
Best Management Practices, AG-588-
01, of the Urban Waterways series.
This fact sheet provides more detailed
information on designing, installing,
and maintaining level spreaders.
srerct Nnvxvrt?
t&1 %1 ill:i Srtl W01%
NC COOPERATWE
?`! ECMN5ION
Aiiili U.?r:at lsy? IN fir:. 6.1, c A. 4
DIFFUSE FLOW: WHAT IS IT?
Diffuse flow, sometimes called sheet
flow, occurs when water spreads out
evenly across an area (Figure 1). In
contrast, when stormwater collects
in a drainage system and flows to a
stream via a pipe, swale, or ditch, it
does not make enough contact with
or bypasses the riparian buffer-a
vegetated area along streams, riv-
ers, and other water bodies that helps
to filter runoff and prevent erosion.
Riparian buffers can improve water
quality in urban environments by re-
ducing stormwater peak flow, reducing
runoff volume through infiltration,
and removing nutrients and sediment
through physical and biological pro-
cesses. They are most effective, how-
ever, when stormwater flows through
them at a shallow, uniform depth-the
diffuse flow that well-designed level
spreaders can provide.
LEVEL SPREADER SYSTEMS:
AN OVERVIEW
Level spreader systems consist of
three parts: the forebay, the channel,
and the riparian buffer (Figure 2).
perse outflow from a detention pond, a forebay may be
necessary to reduce runoff velocity before the outflow
reaches the level spreader.
FoREBAY. The first part of the system is the forebay,
which is used for the preliminary treatment of storm-
water. It is an excavated, bowl-shaped feature that
slows the influent stormwater and allows heavy sedi-
ment and debris to settle. The forebay may be lined
with riprap to reduce erosion within the excavated
area. The uneven riprap surfaces function as small
sediment traps. When a level spreader is used to dis-
CHANNEL. After the stormwater passes though the
forebay, it enters a concrete, rock, or grassed chan-
nel-the main body of the level spreader. This is a
dead-end channel because it does not directly connect
the watershed to the stream. Instead, the channel is a
long, shallow impoundment that fills to the level of
its lower side. The lower side (the downslope side) of
the channel is constructed so that it is level along its
full length. This lower side, or level spreader lip, is
often constructed of concrete or rock so that it resists
erosion. As stormwater enters the channel, it rises
until it fills the channel and exits evenly over the lip.
The downslope side of the system functions as a long,
broad-crested weir.
RIPARIAN BUFFER. After the stormwater passes over the
level spreader lip, it enters the riparian buffer, often
simply called the buffer. As the stormwater passes
through the buffer vegetation, some of the water in-
filtrates. Ideally, the buffer will remove sediment and
nutrients from runoff before it reaches the stream.
Figure 2. Level spreader system
RECENT LEVEL SPREADER RESEARCH
The Biological and Agricultural Engineering Depart-
ment at North Carolina State University received a
grant from NCDENR in December 2005 to evaluate
level spreaders as stormwater best management prac-
tices (BMPs). The researchers visited 24 locations
where level spreaders were in use and performed vari-
ous qualitative and quantitative analyses.
The results of the study indicated that none of the
level spreader-riparian buffer systems was able to
provide diffuse flow through the riparian buffer from
the level spreader to the stream. Common causes for
failure to maintain diffuse flow included the follow-
ing:
• Lack of maintenance.
• Poor design.
• Riparian topography, vegetation, or both .
• Poor construction methods (level spreader lip not
level; channel built with easily eroded materials
as in Figure 3).
• Human interference after the level spreader has
been constructed.
This field evaluation indicated that level spreader sys-
tems in North Carolina would benefit from design re-
visions, construction guidance, and maintenance. As a
result, the design guidelines developed by NCDENR
in October 2001 were revisited and revised in the
summer of 2006.
DESIGN RECOMMENDATIONS
Based on this research, the following recommenda-
tions should be considered when designing level
spreaders.
LEVEL SPREADER LIP. A level spreader system obviously
needs a stable lip that cannot be eroded. Concrete
level spreaders can be built with minimal slope along
the length of the channel's downslope side. Concrete
level spreaders resist erosion better than level spread-
ers made of earth, gravel, or both. If a flow greater
than the design flow is routed over a level spreader
made of concrete, the level spreader lip will not be
damaged. Level spreaders made of earth, gravel, or
both should not be used in any urban applications be-
cause they routinely fail. Another stable material is a
metal gutter. Like concrete level spreaders, pre-fabri-
cated metal level spreaders can be expected to remain
level with minimal maintenance.
Ideally, the lip of the concrete level spreader should
be higher than the existing ground by 3 to 6 inches.
This allows water to pass over the lip without interfer-
ence from buffer vegetation. To limit any erosion that
could occur as water falls from the top of the level
spreader to the existing soil, a layer of filter fabric
should be extended a distance of 3 feet from the level
spreader lip towards the buffer. Stone, such as No. 57
aggregate, should be placed on top of the filter fabric
(3 to 4 inches deep) to reduce erosion just downslope
of the level spreader (Figure 4). A 3-foot wide strip
of erosion control matting can be used in place of the
filter fabric and No. 57 stone combination. However,
such an area must be stable and have adequate vegeta-
tion before receiving stormwater.
LEVEL SPREADER DIMENSIONS. Level spreader dimen-
sions have a broad range, and no combination seems
to be superior. The width of a level spreader, however,
should be at least three times wider than the diameter
of the inlet culvert. The design depth, or depth be-
tween the invert of the level spreader channel and the
level spreader lip, is currently recommended to be no
less than either 9 inches or half of the inlet culvert di-
ameter, whichever is greater.
When discharging into a buffer with thick ground
cover, there must be 13 feet of level spreader for
every 1 cubic foot per second (cfs) of flow. This
design specification is based on maximum flow ve-
locities and is intended to limit erosion in the buffer.
Grass, for example, is more resistant to erosion than
mulch and detritus. Therefore, a shorter length of
level spreader is needed upslope of grass than upslope
of mature woods. In forested buffers, this number
varies based on the width of the riparian buffer. The
wider the riparian buffer, particularly wooded buffers,
the more stormwater will infiltrate the buffer. When
infiltration within the buffer is taken into account,
the length of level spreader per unit of flow can be
reduced:
• A level spreader discharging onto a 50-foot wide
wooded riparian buffer should be sized at 65 feet
per 1 cfs of flow.
• Discharging onto a 100-foot wide wooded buffer
requires 50 feet of level spreader per I cfs of flow.
• Discharging onto a 150-foot wide wooded buffer
requires 40 feet of level spreader per 1 cfs of flow.
The minimum length of any level spreader should be
13 feet, and the maximum allowable length by DWQ
standards is 130 feet. A summary of the sizing guide-
lines for level spreader lip length is shown in Table 1.
Table 1. Level Spreader Lip Sizing Guidelines
Riparian Buffer Riparian Buffer Length of Level
Spreader
Vegetation Width (ft) (ft per 1 cfs of flow)
Thick ground cover For any width 13
Forested 50 65
Forested 100 50
Forested 150 40
FOREBAY INCLUSION. Forebays should be utilized in lev-
el spreader systems to dissipate energy and reduce the
sediment that accumulates behind the level spreader
lip (Figure 5). The forebay is essentially a bowl-
shaped depression lined on the bottom and sides with
Class B rip rap. The forebay should be sized so that it
is at least 0.2 percent of the contributing catchment's
impervious or paved surface area. The catchment is
the land area draining to the system.
The depth of the forebay where the stormwater ini-
tially enters should be 3 feet. The forebay should then
slope upward to a depth of 1 foot prior to discharging
into the level spreader (Figure 5).
FLOW-BYPASS. If runoff from high intensity storms
(those that deliver more than 1 inch of rain per hour)
is allowed to flow through a level-spreader and ripar-
ian-buffer system that is not designed to handle such
storms, erosion can occur within the buffer. Thus, dur-
ing heavy rain storms that produce more runoff than
can be infiltrated by the buffer, excess stormwater
should bypass the buffer and be sent through a pro-
tected channel to a predetermined, protected stream
entry point. This is achieved by allowing the runoff
produced by a rainfall intensity of I inch per hour to
enter the level spreader while diverting runoff from
heavier rainfalls to the stream. The bypass channel, or
stivale, should employ turf reinforcement matting or
rip rap.

Level Spreader Lip
"
Layer of
3
Flow Path #57 5tone
--..__ Riparian
Buffer

Channel
3 ft Wide
Underdrain - 51zed 5trip of
for Site 5oil filter fabric
Condition5 - Drain Appropriately 5ized
Into Bypa55 5wale Concrete Footer
Figure 4. Sample cross section of a concrete level spreader
Pipe From
Diversion
Influent To Level
?f - Stormwater Spreader
I ft
3 ft Yy 1
_I v t\
A
Figure 5. (A) Forebay schematic. (B) Image of level spreader with forebay
MAXIMUM SLOPE. The first 10 feet of riparian buffer
downslope of the level spreader should have a slope
less than or equal to 4 percent.
The overall slope of the buffer should not exceed 6
percent for wooded buffers and 8 percent for buffers
containing thick ground cover (such as grass). When
slopes are greater than this, other practices, such as
bioretention, stormwater wetlands, and ponds, can be
used to reduce peak flows and provide water quality
improvements. However, on a case-by-case basis, the
DWQ may approve a series of level spreaders for ri-
parian buffer slopes of 12 to 15 percent. This approval
is contingent on a site visit and the professional judg-
ment of the DWQ permitter.
MAINTENANCE
Level spreaders require at least yearly maintenance
to remove trees and shrubs that begin to grow on the
level spreader lip or that impede flow just downslope
of the level spreader (in the section of No. 57 stone
from Figure 4). Any debris and sediment that build
tip in the level spreader, forebay, and channel should
be removed annually and after storms greater than
or equal to a two-year storm-the precipitation
associated with a 24-hour storm event that occurs, on
average, once every two years (Figures 6 and 7). In
North Carolina, the two-year storm ranges from 3.5 to
4.25 inches over a 24-hour period. Additionally, the
level spreader channel and the riparian buffer should
be examined annually and after storms greater than or
equal to the two-year storm for possible erosion and
gulley formation.
If possible, the buffer vegetation immediately
downslope of the level spreader lip should be mowed
regularly to encourage low, dense growth and to
facilitate inspection. The use of perennial, dense,
low-growing ground covers (such as common bermu-
dagrass) downslope of the lip may help to maintain
diffuse flow.
These issues should be addressed immediately to
restore proper function. If erosion is apparent, correc-
tive action must be taken, such as installing erosion
control matting and possibly regrading. NCDENR
must be notified before any work is performed in the
protected buffer.
RIPARIAN BUFFER TOPOGRAPHY
Riparian buffers are highly variable. Depending
on internal buffer topography, water will tend to
re-concentrate, almost immediately in some cases
Certain level-spreader and riparian-buffer systems
may only partially disperse influent concentrated
flow. The systems still can improve water quality
and reduce flow peaks. However, level spreaders
should be situated in areas away from natural swales,
depressions, and mounds where diffuse flow is more
attainable. If the riparian buffer is not conducive to
diffuse flow, other BMPs should be considered.
SUMMARY
Table 2 shows suggested site selection, design, and
maintenance criteria for level spreader systems. Level
spreader design is not as technically challenging
as other stormwater BMP designs. Nevertheless,
siting and installing a level spreader that functions
properly is challenging. The design criteria described
in this publication represent elements of good level
spreader design but do not ensure overall system
effectiveness. For the system to function as intended,
it must be maintained, and the internal topography of
the riparian buffer must be conducive to keeping flow
diffuse. Before designing a level spreader system, the
designer should visit the .site. This site visit is highly
recommended. If conditions are not suitable for the
installation of the level spreader (for example, if the
slope is too steep or adequate space is not available),
other stormwater BMPs should be used.
Table 2: Level Spreader Site Selection, Design, and Maintenance Recommendations
Item Recommendation
Level spreader lip material A concrete or sturdy metal lip should be used in all level spreaders. The lip should be tied into
the soil with an appropriately sized concrete footer or similar footer.
Level spreader lip dimensions The concrete lip should extend 3 to 6 inches above the existing grade on the buffer side. Just
after the lip, a 3-foot wide, 3- to 4-inch thick layer of No. 57 stone should be used to minimize
erosion due to the water spilling over the level lip. This gravel should be laid on top of filter
fabric that has been tied into the soil.
Buffer slope Riparian buffer slopes should not exceed 8% when discharging into a densely vegetated buffer
and 6% when discharging into a forested buffer. A series of level spreaders may be approved by
DWQ for buffer slopes up to 12 to 15%.
Flow bypass Only the amount of flow associated with a rainfall intensity of 1 inch/hour should be routed
through the level spreader. All additional flow should be routed to the stream via a properly
designed and maintained swale or pipe. Stream banks should be protected at the point where
the additional flow will be discharged.
Forebay A forebay, or some other form of pretreatment, should be a part of any level spreader design.
The forebay surface area should be no less than 0.2% of the contributing catchment's
impervious surface area.
Maintenance Level spreaders should be maintained yearly and after storms greater than or equal to a two-
year, 24-hour event. Sediment and debris should be removed from the forebay and from the
channel behind the level lip. All trees and vegetation that grow in the section of no. 57 stone
should be removed. The grass in all swales should be maintained, and the level spreader and
buffer should be checked for signs of erosion. Erosion that is discovered in the buffer should be
addressed through the application of erosion control mat and through re-grading if necessary.
NCDENR must be notified prior to any work performed in a protected riparian buffer.
RESOURCES
RELATED FACT SHEETS in the Urban Waterways series,
North Carolina Cooperative Extension, and North
Carolina Agricultural Research Service Bulletins,
N.C. State University:
Hunt, W. F. 2000. Urban Stormwater Structural Best
Management Practicer (BMPs) (AG-588-01).
Online: http://www.bae.ncsu..edu/stormwater/
PublicationFiles/UrbanBMPS 199.pdf
Hunt, W. F., and L. L. Szpir. 2006. Permeable Pave-
ments, Green Roofs, and Cisterns: Practices for
Low Impact Development (AGW-588-06). Online:
http://www.bae.ncsu.edu/stormwater/
PublicationFiles/BMPs4LID.pdf
Osmond, D. L., J. W. Gilliam, and R. O. Evans. 2002.
Riparian Buffers and Controlled Drainage to Re-
duce Agricultural Nonpoint Source Pollution. N.C.
Agricultural Research Service Technical Bulletin
318. Online: http://www.soil.ncsu.edu/lockers/
Osm ond_D/web/RiparianBuffers.pdf
RELATED WEB SITES
BAE Stormwater Group
www.bae.nesu.edu/stormwater
Highlights of stormwater research projects and
Extension programs provided across North
Carolina by N.C. State University's Biological and
Agricultural Engineering Department.
State of North Carolina
www.stormwatenorg
NCDENR's stormwater site.
hftp://h20.enr.state.ne.us/su/Manuals-Factsheets.
htm
DWQ manuals, fact sheets, and a link to the revised
level spreader design guidelines.
ACKNOWLEDGEMENTS
All photographs provided by the authors except for
Figure 1, courtesy of Frank Hahne, Mecklenburg
County Engineering Department.
Prepared by
Jon M. Hathaway, Extension Associate
William F. Hunt, Assistant Professor and Extension Specialist
Biological and Agricultural Engineering
North Carolina State University
Published by
NORTH CAROLINA COOPERATIVE EXTENSION SERVICE
C*..." OF
AGRICULTURE LIFE SCIENCES
A C A D E M I C S • R E S E A R C H . E X T E N S I O N
AGW-588-09 E07-45839
I1/2006/bs
14

Water-tight joint integrity prevents the
infiltration of sediment particles and soil
pollutants, and the exfiltration of any con-
taminants in the storm water.
The ADS WaterStop" gasket (right) is a
field-installed water-tight seal between
ADS N-12 pipe and manholes and other
concrete structures. When grouted, it
becomes a monolithic part of the man-
hole.
ADS N-1211 WT pipe features integral
bells with an F477 gasket that provide a
push-together water-tight connection.
ADS also provides similar water-tight
connections to Nyloplast catch basins,
inline drains, and other surface drainage
products.

Most storm sewer outlet pipes discharge
directly into streams or open ditches. This
type of outlet can lead to scouring or ero-
sion of the stream bed or ditch. Level
spreaders are used to dissipate the out-
flow over a wide area of land, allowing
the treatment of pollutants by filtration
through natural vegetation.
ADS offers two alternatives for level
spreaders: Duraslot® linear surface
drains, which have an open metal grate
from the top of the pipe to surface grade,
or ADS perforated pipe. Both allow storm
water to exfiltrate out of the pipe and up
to the ground surface, discharging the
water more slowly into the receiving
stream.

CAST IRO N CR ATE
AND FR AME
I
• I
TYPICAL MANHOLE
I
IVATERTICHI SEAL MADE
- DY KOK OR EOUK
ADS N-II W/

I ADAPTER FITTING
INSURE BACKFILL IS PLACED
UNDER PIPE AND PROPERLY
COMPACTED

6" (150-) MIN. CLASS I OR H BEDDING
FOU NDATION
FROM RALEIGH REGULATORY 10.16.1998 15:50 P.01
-' U.n. L'llMAI I t-VA 1 J Vl' 1: " " JLA 1 ju`kwo"
Wilmington District
Action ID: 199506478 County: Wake
Notification of Jurisdictional Determination
Property Owner: Agent: Soil & Environmental Consultants, Inc.
Address: ATTN: Bob Zarzecki
244 W. Millbrook Road
Raleigh, NC 27609
Telephone No.: 846-5900
Size and Location of project (waterway, road name/number, town, etc.):
Approximately 1,900 acre parcel located between Page Road, Globe Road, Aviation Parkway and 70, near the
Wake/Durham County line, adjacent to Little Brier Creek and unnamed tributaries, in North Carolina.
Indicate Which of the following apply:
X There are wetlands on the above described property which we strongly suggest should be
surveyed. The surveyed wetland lines must be verified by our staff before the Corps will make a final
jurisdictional determination on your property.
Because of the size of your property and our present workload, our identification and delineation of your
wetlands cannot be accomplished in a timely manner. You may wish to employ a consultant to obtain a moi
timely delineation of the wetlands. Once your consultant has flagged a wetland line on the property, Corps
staff will review it, and, if it is accurate, we strongly recorrunend that you have the line surveyed for final
approval by the Corps. The Corps will not make a final jurisdictional determinations on your property witho
an approved survey.
X The wetlands on your lot have been delineated, and the limits of Corps jurisdiction have been explained to 3
Unless there is a change in the law or our published regulations, this determination may be relied upon for a
period not to exceed five years from the date of this notification.
There are no wetlands present on the above described property which are subject to the permit requirements
Section 404 of the Clean Water Act (33 USC 1344). Unless there is a change in the law or our published
.regulations, this determination may be relied upon for a period not to exceed five years from the date of thk
notification.
Placement of dredged or fill material in wetlands on this property without a Department of the Army permit is in
most cases a violation of Section 301 of the Clean Water Act (33 USC 1311). A permit is not required for work
the property restricted entirely to existing high ground. If you have any questions regarding the Corps of Engine
regulatory program, please contact Eric Alsme er at telephone number (919) 876-844I, extension 23.
e----, , ,-7 !g-
Project Manager Signature
Date October 16, 1998 Expiration Date October 16, 2003
SURVEY PLAT OR FIELD SKETCH OF DESCRIBED PROPERTY AND THE WETT.AND DELINEATION
FORM MUST BE ATTACHED TO THE YELLOW (FILE) COPY OF THIS FORM.
CF: S&EC
U.S. ARMY CORPS OF ENGINEERS "
Wilmington District y % 4
Action ID: 199920085 / 199920086 County: 14' Wake
U 5
GENERAL PERMIT (REGIONAL AND NATIONWIDEQER TION
Property
Owner Toll Brothers
Attn: Charles T. Wanta
Address 1215 Jones Franklin Road. Suite 205
Raleigh, 27606
Telephone Number 919-233-0939
Authorized
Agent Soil :&-EmironmentalConsultatt lie
,O Attn: Kevin Martin
Address 244 West Millbrook Road
Raleigh. NC 27609
Telephone Number 919-846-5900
Size and Location of Pronertv (waterbodv. Hizhwav name/number, town, etc.):
The property is approximately 628 acres in size and is located to the east and west of SR 1645 (Lumley
Road), approximately 1 mile south of the intersection of SR 1645 and SR 1973 (Page Road), in Raleigh,
Wake County, North Carolina. The site is adjacent to Little Brier Creek, above headwaters, in the Neuse
River Basin. (related AIDs 199820360, 199821070, 199821227, 199821250, & 199920084)
Description of Activity: Mechanized landclearing, excavation, filling, and the placement of pipes and the
placement of fill associated with the development of Brier Creek Country Club. Permanent impacts to
waters of the U.S., to include wetlands associated with the project include 0.05 acre and 210 linear feet of
channel under NWP 12 (AID 199920085) and 0.215 acre and 1095 linear feet of channel under NWP 26
(AID 199920086).
Applicable Law: X Section 404 (Clean Water Act, 33 USC 1344) only.
Section 10 (River and Harbor Act of 1899) only.
Authorization: Regional General Permit Number
12 & 26 Nationwide Permit Number
Any violation of the conditions of the Regional General or Nationwide Permit referenced above may
subject the permittee to a stop work order, a restoration order, and/or appropriate legal action.
This Department of the Army Regional General Permit or Nationwide Permit verification does not
relieve the permittee of the responsibility to obtain any other required Federal, State, or local
approvals/permits. The permittee may need to contact appropriate State and local agencies before
beginning work. If you have any questions regarding the Corps of Engineers regulatory program,
please contact Todd Tugwell at telephone number (919) 876 - 8441 extension 26
Regulatory Project Manager Signature
Date November 17, 1998 Expiration Date NWP 12 -November 17, 2000
NWP 26 - September 15, 1999
SURVEY PLATS, FIELD SKETCH, WETLAND DELINEATION FORM, ETC., MUST BE ATTACHED
TO THE YELLOW (FILE) COPY OF THIS FORM, IF REQUIRED OR AVAILABLE.
copy: City of Raleigh Inspections
NOV-10-1998 11:01
State of North Carolina
? 303' .?.
Department of Environment
and Natural Resources
Division of Waiter Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
*
NC EN-R
NORTH CAROLINA DePARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
November 4, 1998
Wake County
WQC 401 Project # 981052
APPROVAL of 401 Water quality Certlflcatlon
Mr. Charles Wanta
Toll Brothers
1215 Jones Franklin Road
Suite 205
Raleigh, NC 27606
Post-It' Fax Note 7671 ioade
Dear Mr.Wanta: ' IFax#'54410 r4V
P. 01/13
'15.
NIW
You have our approval, in accordance with the attached conditions, to place fill material in 0.285 acres of
wettands or waters for the purpose of a residential development, as you described in your application dated
October 21,.1998. After reviewing your application, we have decided that this fill is covered by General Water
Quality Certification Numbers 3101 and 3109. These Certifications allow you to use Nationwide Permit
Numbers 12 and 26 when the Corps of Engineers issues them. This Certification is also covered by Neuse
Buffer Rules (NBR). In addition, you should get any other federal, state or local permits before you go ahead
with your project including (but not limited to) Sediment and Erosion Control, Coastal Stormwater, Non-
Discharge and Water Supply Watershed regulations. Also this approval will expire when the accompanying
404 or CAMA permit expires unless otherwise specified in the General Certification.
This approval is only valid for the purpose and design that you described in your application. If you
change your project, you must notify us and you may be required to send us a new application for a new
certification. If the property is sold, the new owner must be given a copy of the Certification and approval
letter and is thereby responsible for complying with all conditions. If total wetland fills for this project (now or in
the future) exceed one acre, compensatory mitigation may be required as described in '15A NCAC 2H .0506
(h). For this approval to be valid, you must follow the conditions listed in the attached certification.
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing.
You must act within 60 days of the date that you receive this letter. To ask for a hearing, send a written
petition which conforms to Chapter 1506 of the North Carolina General Statutes to the Office of Administrative
Hearings, P.O. Box 27447, Raleigh, N.C. 276 1 1-7447. This certification and its conditions are final and
binding unless you ask for a hearing.
This letter completes the review of the Division of Water duality under Section 401 of the Clean Water
Act. If you have any questions, please telephone John Dorney at 919-739-1786.
Sincerely,
®ron plow , Jr. P_
Attachment
cc: Wilmington District Corps of Engineers
Corps of Engineers Raleigh Feld Office
Raleigh DWQ Regional Office
Mr. John Domey
Central Files 981052.Itr
. Division of Water Quality - Environmental Sciences Branch
Environmental Sciences Branch, 4401 Reedy Creek Rd., Raleigh, NC 27607 Telephone [phone]
FAX [phone]
An Equal Opportunity Affirmative Action Employer - 50% recycied/10% post consumer paper
U.S. ARMY CORPS OF ENGINEERS
Wilmington District
Action ID: 200220974
County:
GENERAL PERMIT (REGIONAL AND NATIONWIDE)
Property
Owner Toll Brothers, Inc.
Attn: Lee Honeycutt
Address 2310 T.W. Alexander Drive, Suite G
Raleigh, NC 27617
Telephone Number 919-321-4800
Authorized
D G0 C?0 IV E
Agent Soil & Environmental Consultants, Inc.
Attn: Jennifer Burdette
Address 11010 Raven Ridge Road
Raleigh, NC 27614
Telephone Number 919-846-5900
Size and Location of Property (waterbody, Highway name/number, town, etc.): The Brier Creek
Golf Community is located south of Alexander Drive and east of its intersection with U.S. Hwy 70. This
site is known as Phase 15 - Land Bay J/M.
Description of Activity: This permit authorizes the installation of culverts and the placement of fill
associated with the construction of a road crossing (R3) that was previously permitted under NWP 26
(AID 199920085). Additional impacts are authorized by this permit in addition to original impacts for
crossing R3. Total impacts to wetlands authorized by this permit for this single road crossing is 0.01 acre.
Applicable Law:
Authorization:
X Section 404 (Clean Water Act, 33 USC 1344) only.
Section 10 (River and Harbor Act of 1899) only.
14
Regional General Permit Number
Nationwide Permit Number
Any violation of the conditions of the Regional General or Nationwide Permit referenced above may
subject the permittee to a stop work order, a restoration order, and/or appropriate legal action.
This Department of the Army Regional General Permit or Nationwide Permit verification does not
relieve the permittee of the responsibility to obtain any other required Federal, State, or local
approvals/permits. The permittee may need to contact appropriate State and local agencies before
beginning work. If you have any questions regarding the Corps of Engineers regulatory program,
please contact
Amanda D. Jones at telephone number (919) 876 - 8441 extension 30
Regulatory Project Manager Signature
Date May 09, 2002 Expiration Date May 09, 2004
SURVEY PLATS, FIELD SKETCH, WETLAND DELINEATION FORM, ETC., MUST BE ATTACHED
TO THE YELLOW (FILE) COPY OF THIS FORM, IF REQUIRED OR AVAILABLE.
Jo3y LB JM
050907- AW l
PMT-
\o?b? vv r, , ?RpG
Lee Honeycutt
Toll Brothers, Inc.
2310 T.W. Alexander Drive, Suite G
Raleigh, NC, 27617
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
I--? Department of Environment and Natural Resources
DI Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
May 21, 2002
DW Q# 02-0468
Wake County
Sincerely,
APPROVAL of 401 Water Duality Certification and Neuse River Buffer Rules with Additional Conditions
Dear Mr. Honeycutt
You have our approval, in accordance with the attached conditions, to place fill in 0.01 acre of wetlands in order to construct a
road crossing at the Brier Creek Country Club Subdivision, Phase 15 in Wake County, as described in your application received by the
Division of Water Quality on March 2i, 2002. After reviewing your dppiicaiioo, we have deteanlned that this fill is covered by General
Water Quality Certification Number 3375, which can be downloaded from our web site at httpl/h2o.enr.state.nc.us/ncwetiands . This
Certification allows you to use Nationwide Permit Number 14 when issued by the U.S. Army Corps of Engineers. This approval is also
valid for the Neuse River Buffer Rules (15A NCAC 2B .0233). In addition, you should get any other federal, state or local permits
before you go ahead with your project including (but riot limited to) Sediment and Erosion Control, Non-Discharge and Water Supply
Watershed regulations. Also this approval will expire when the accompanying 404 permit expires unless otherwise specified in the
General Certification.
This approval is only valid for the purpose and design that you described in your application. If you change your project, you must
notify us in writing and you may be required to send us a new application for a new certification. If the property is sold, the new owner
must be given a copy of the Certification and approval letter and is thereby responsible for complying with all conditions. If total wetland
fills for this project (now or in the future) exceed one acre, compensatory mitigation may be required as described in 15A NCAC 2H .0506
(h). For this approval to be valid, you must follow the conditions listed in the attached certification as well as the additional conditions
listed below:._ -._._._
An additional condition is that stormwater shall be directed to diffuse flow at non-erosive velocities through the protected stream
buffers. Before any of the impacts approved herein are conducted, the final stormwater management plan for the entire site must be
submitted to this office;
2. Deed notifications or similar mechanisms shall be placed on all remaining jurisdictional wetlands and waters or areas within 50 feet of
all streams and ponds. These mechanisms shall be put in place within 30 days of the date of this letter or the issuance of the 404
Permit (whichever is later). A sample deed notification format can be downloaded from the 401 /Wetlands Unit web site at
htto://h2o.enr.state.nc.us/ncwetiands .
If you do not accept any of the conditions of this certification, you may ask for an adjudicatory hearing. You must act within 60 days
of the date that you receive this letter. To ask for a hearing, send a written petition which conforms to Chapter 150B of the North Carolina
General Statutes to the Office of Administrative Hearinas. P.O. Box 27447, Raleigh, N.C. 27611-7447. This certification and its conditions
are final and binding unless you ask for a hearing.
This letter completes the review of the Division of Water Quality under Section 401 of the Clean Water Act. If you have any
questions, please telephone Steve Mitchell in our Raleigh Regional Office at 919-571-4700 or Cyndi Karoly in the Central Office at 919-
733-9721.
Attachments
cc: Corps of Engineers Raleigh Field Office
Raleigh DWQ Regional Office
Central Files
File Copy
re J. Thorpe, Ph
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Jennifer Burdette, 11010 Raven Ridge Road, Raleigh, NC, 27614
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North Carolina Division of Water Quality, dA01 Wetlands f ertificatinn I In it
1650 Mail Service Center, Raleigh, NC 27699-1650 (Mailing Address)
2321 Crabtree Blvd., Raleigh, NC 27604-2260 (Location)
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Since 1979
THE JOHN R. McADAMS COMPANY, INC.
MEMORANDUM
October 30, 2008
To: Toll Brothers ?e
From: Brandon R. Finch, PE ;? f r
Re: Brier Creek Country Club Phase 15 - Landbay J/M
Alternative Nitrogen Removal Device at Lots 737 & 738
TOL-99110
As stated in 15A NCAC 02B .0232, it is a goal of the Environmental
Management Commission (EMC) to reduce the average annual load of
nitrogen delivered to the Neuse River Estuary from point and nonpoint
sources by a minimum of 30 percent of the average annual load for the period
1991-1995, by the year 2001. To help achieve this goal, a series of rules were
implemented. The two rules that relate directly to this particular situation are:
(1) Rule .0233 for protection and maintenance of riparian areas
(2) Rule .0235 for urban stormwater management
Research Triangle Park, NO
Post Office Box 14005
Research Triangle Park,
North Carolina 27709
2905 Meridian Parkway
Durham, North Carolina 27713
800-733-5646
919-361-5000
919-361-2269 Fax
Charlotte, INC
6701 Carmel Road
Suite 205
Charlotte, North Carolina 28226
800-733-5646
704-527-0600
704-527-2003 Fax
Wilmington, NO
3904 Oleander Drive
Suite 200
Wilmington, North Carolina 28403
800-733-5646
910-799-8181
910-799-8171 Fax
The stormwater management plan for Brier Creek Country Club Phase 15 -
Landbay J/M was approved on August 5, 2003. In that approval (copy of
approved schematic attached), a level spreader mechanism behind Lots 737 &
738 was approved for "water quality purposes."
In April 25, 2003 correspondence from DWQ staff regarding the level
spreader at Lots 737 & 738, DWQ noted that the site "proposes an alternative
nitrogen removal device in lieu of providing diffuse flow through the buffer."
Because the level spreader was recognized from its proposal as a nitrogen
removal device rather than to provide diffuse flow and the nitrogen removal
achieved by the existing structure may not be sufficient, and because any
alternative BMP is not practicable due to the limited size of the easement area,
we propose to remove the level spreader and make an offset payment for
nitrogen as discussed below.
To address nutrient removal at this location and, in our opinion, to meet the
intent of the overall Neuse River Basin Rules, we would like to propose to
make an offset payment for an amount of nitrogen that would be equal to the
amount that would have been removed (assumed 30% based on current
criteria) by providing diffuse flow. We believe that an offset payment is the
best alternative in light of the site limitations.
www.jol)nrn)cadams.com i Design Services Focused On Client Success
Since 1979
f THE JOHN R_. McADAMS COMPANY INC.
Toll Brothers
Brier Creek Country Club Phase 15
October 30, 2008
Page 2
Hopefully this is an acceptable "mitigation" to the current situation at Lots
737-738. We are prepared to provide DWQ with detailed calculations of the
nitrogen load reduction and associated offset payment.
Cc: Jonathan G. Moore, P.E.
D. Amos Clark, PE
TOL-99110