20001390 Ver 1_COMPLETE FILE_20001101

TO:
WITHERS & RAVENEL
ENGINEERING & SURVEYING, INC.
11 1 MacKenan Drive
CARY, NORTH CAROLINA, 27511
[phone]
FAX [phone]
NCDENR
Division of Water Quality
401 Wetlands Certification Unit

DATE: 05/23/02 JOB NO. 200147
RE: Cornerstone Park yam"
ATTENTION: Todd St. John i F
l
PHONE #:
WETLAWS GROLI

j
WE ARE SENDING YOU Z Attached ? Under separate cover via the following items:
? Shop Drawings ? Prints ® Plans ? Samples ? Specifications
? Copy of Letter ? Change order ? Diskette ?
COPIES DATE NO. DESCRIPTION
1 Revised Storm Water Management Plans
1 Letter dated May 23, 2002
THESE ARE TRANSMITTED as checked below:
? For approval ? Approved as submitted ? Resubmit-copies for approval
® For your use ? Approved as noted
? Submit-copies for distribution
® As requested
? Returned for corrections ? Return-corrected prints
? For review and comment ?
? FORBIDS DUE 20 ? PRINTS RETURNED AFTER LOAN TO US
REMARKS:
COPY TO: SIGNED:
if anrlnanrua uwn nn4 as nnfad ldnd1w n.#W m wt nnro
E
WITHERS RAVENEL
ENGINEERS I PLANNERS I SURVEYORS
May 23, 2002
Mr. Todd St. John
Division of Water Quality
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Re: Cornerstone Park
Highway 70, LLC
DWQ Project #: 001530 & 001390
Dear Mr. St. John,
Enclosed are revised storm water management plans for the referenced project. We
have made our revisions based on our recent phone meeting and your letter dated
May 10, 2002. To help clarify our revisions, I have summarized them below.
1. Dry Detention Basins
a. We have designed our dry detention basins to capture the first inch of
runoff and detain it for a period of 2-5 days. To slowly draw down
the first inch of runoff, we are proposing to use a skimmer type device
that discharges into a sod grass level spreader. The draw down
discharges are less than 0.10 cfs. The grass level spreaders are
located outside of the buffers. Higher storms are routed through a
riser/barrel structure and are discharged into the buffer. Rip Rap
outlet protection is provided at the barrel pipe.
b. For informational purposes, the dry detention pond on Lot 1 will be
used as a temporary device. The City of Raleigh is going to build
Country Trail and will be using the pond as an oversized sediment
basin. Once roadway construction is complete, the basin will be
converted to an extended wetland detention basin. Ken Jesneck is
preparing drawings for it and will forward to you as soon as he has
them completed. The pond is a requirement of the properties zoning,
therefore, it must be installed prior to any development of Lot 1.
2. Level Spreaders
a. We were able to use three level spreaders on this project because
buffer slopes were gentle enough to accept diffuse flow. The buffers
are wooded and have considerable undergrowth; therefore, we have
based our level spreader design on a 10-year storm event and a level
spreader length of 13 feet for every cfs.
I:\EngUser\J ERMPROJ ECTS\Cornerstone\Stormwater\ToddStJohn3.doc
iii MacKenan Drive i Cary, North Carolina 27511 1 tel: [phone] fax: [phone]oo8 i www.withersravenel.com
Page 2
February 1, 2002
Mr. Todd St. John
3. Wetland Vegetation
a. We have completely removed cattails from own planting plans.
4. Wetland Fore bay and Micro pools
a. We have reviewed all of the wetland detention ponds to ensure that
adequate sizing of fore bays and micro pools are provided. In most
cases, we have increased these features to approximately 15% of the
total pond surface area and make sure they have at least 18-inches of
depth.
5. Drainage Area
a. On sheet 1, we have delineated the drainage area for each storm
water device.
Thank you for your help on this project. As mentioned to you in our earlier phone
meeting, Mr. John Holly is holding the erosion control approval for the construction
of the City's project to construct Marvino Lane and Country Trail. He is waiting
until you are satisfied with the storm water management plan and their impacts to
the buffer. The City would like to begin construction in early June and are ready to
proceed. If the plans are acceptable to you, please contact Mr. Holly so that he
may release his approval for the City's project.
Sincerely,

Jerry J. Jensen, P.E.
Ken Jesneck, P.E.
I:\EngUser\J ERRY\PROJ ECTS\Cornerstone\Stormwater\ToddStJohn3.doc
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
Ken Jesnic
Withers and Ravenel
111 MacKenan Drive
Cary, NC 27511
Subject:
Dear Mr. Jesnic:
May 10, 2002
Highway 70 LLC
DWQ Project No. 001530
Wake County
..
,. Al
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
Dry Detention Basins
Dry Detention basis are not considered to remove nitrogen. As such, the discharge must flow in a diffuse manner
through the entire 50 foot buffer. In some cases it is allowable to discharge the runoff from a 1" rain in a diffuse
manner through the entire buffer and by pass larger discharges. No rip rap dissapators or other hard structures can
be placed in the buffer in association with a dry basin except as part of an approved bypass system. Please revise
the plans to reflect these requirements
Level Spreaders
Level spreaders should be designed to provide diffuse and non-erosive flow of the runoff associated with a ten year
storm event. Typically a level spreader should be 100 feet long for every cfs of discharge for forested areas without
dense undergrowth and 13 feet for areas with dense ground cover. Please revise the plans to accommodate these
parameters.
3. Wetland Vegetation
Cattails should not be planted in the stormwater wetlands as they may overtake other wetland vegetation before it
becomes established. They will volunteer on their own. Please revise the planting plans to exciude planting of
cattails.
4. Wetlands Forebay and Micropools
Each extended detention wetland must include a forebay and a miropool at the outlet that are at least 18" deep
minimum. Each of these features should be approximately 15% of the surface area. These areas are important
during dry weather conditions as habitat for creatures that consume mosquitoes and mosquito larvae.
5. Drainage Area
Please delineate the drainage area including any offsite drainage to each of the stormwater BMPs.
Division wetlands unit staff will strive to complete a final technical review within 10 working days of receipt of the
requested information. If you have any questions or would like to discuss this project, please contact me at (919) 733-
9584. Also, please note that the NCDENR Stormwater Best Management Practices Manual, April 1999, and other
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), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetiands/
Page 2 of 2
documents and information can be downloaded from the Wetlands Unit web site at
hftp://h2o.ehnr.state.nc.us/ncwetlands/.
Sincerely,
?w
Todd St. John, PE
Environmental Engineer
cc: Raleigh Regional Office
File
FWAtF
Michael F. Easley
C, Governor
r William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
May 30, 2002
Ken Jesneck
Withers and Ravenel
111 MacKenan Drive
Cary, NC 27511
Subject: Highway 70 LLC
DWQ Project No. 001530
Wake County
Dear Mr. Jesneck:
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
1. Dry Detention Basins
Staff will review the extended detention wetland design for lot 1 upon receipt.
The level spreader for dry basin no. 2 is located in the future road way fill as well as within the 50 foot buffer. The
level spreader needs to be located outside the entire 50 foot buffer. Also, please discuss the fact that the dry basin
may be eliminated by the road way in the future. Finally, the discharge of the level spreader appears to flow in the
exact same area as the bypass discharge. This would circumvent the purpose of the bypass.
2. Level Spreaders
A portion of the level spreader for lot 8 is located within the 50 foot buffer. The level spreader needs to be located
outside the buffer.
3. Drainage Area
The fate of the runoff from portions of lots 1, 2, 3, and 6 and all of lot 4 is unclear. The runoff from these areas must
also be addressed.
Division wetlands unit staff will strive to complete a final technical review within 10 working days of receipt of the
requested information. If you have any questions or would like to discuss this project, please contact me at (919) 733-
9584. Also, please note that the NCDENR Stormwater Best Management Practices Manual, April 1999, and other
documents and information can be downloaded from the Wetlands Unit web site at
http://h2o.ehnr.state.nc.us/ncwetiands/.
Sincere,
IV-#Stjohn, Todd P
Environmental Engineer
cc: Raleigh Regional Office
File
North Carolina Division of Water Quality, 401 Wetlands C :rtification Un t,
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), hitp://l12o.enr.state.nc.us'nc.wet!ands/
WITHERS 0?- RAVEN EL
ENGINEERS I PLANNERS I SURVEYORS
June 7, 2002
Mr. Todd St. John
Division of Water Quality
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Re: Cornerstone Park
Highway 70, LLC
DWQ Project #: 001530 & 001390
Dear Mr. St. John,
Enclosed are revised storm water management plans for the referenced project. We
have made our revisions based on our June 5th meeting and your letter dated May
30, 2002. To help clarify our revisions, I have summarized them below.
1. Dry Detention Basins
a. We have provided a preliminary design with calculations for the
extended wetland detention pond located on Lot 1 to be constructed
in the future.
b. The skimmer outlet device and level spreader for the dry pond located
on Tract 2 has been relocated so that the spreader is located entirely
outside the 50' buffer and can provide diffuse flow into the full buffer.
2. Level Spreaders
a. The level spreader for Tract 8 has been re-located so that it is entirely
out of the 50' buffer.
3. Drainage Area
a. Lot 1 is currently undeveloped. The runoff from Lot 1 will go entirely
into a dry detention basin currently shown on the plans. The pond is
a temporary device until the City's roadway construction project is
completed and Lot 1 is developed. The pond will be retrofitted to an
extended wetland detention pond. We have provided a preliminary
design for this future detention facility.
b. Lot 2 is currently undeveloped. The existing Carmax detention pond,
dry detention ponds proposed and shown on the plans for Lot 2 and
8, will capture runoff from Lot 2.
c. Lot 3 is currently undeveloped. The existing Carmax detention pond
and dry detention pond proposed at Lot 2 will capture runoff from Lot
3.
I:\EngUser\J ERRY\PROJ ECTS\Cornerstone\Stormwater\ToddStJoh n4.doc
iii MacKenan Drive i Cary, North Carolina 27511 1 tel: [phone] fax: [phone]oo8 i www.withersravenel.com
Page 2
February 1, 2002
Mr. Todd St. John
d. Lot 4 is currently undeveloped. We have included in this submittal
preliminary design information for a wetland pond to be constructed
on Lot 4. Some of the runoff from Lot 4 is discharged into the storm
drainage system along Ebenezer Church Road that discharges directly
into the existing Carmax detention pond.
Thank you for your help on this project. As mentioned to you in our meeting, Mr.
John Holly is holding the erosion control approval for the construction of the City's
project to construct Marvino Lane and Country Trail. He is waiting until you are
satisfied with the storm water management plan and their impacts to the buffer. The
City would like to begin construction in early June and are ready to proceed. If the
plans are acceptable to you, please contact Mr. Holly so that he may release his
approval for the City's project.
Sincerely,
.1114,4
Jerry J. Jensen, P.E.
Ken Jesneck, P.E.

I:\EngU ser\) ERRY1PROJ ECTS\Cornerstone\Stormwater\ToddStjoh n4.doc

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B, Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
11kTTWAJ .
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
January 4, 2001
Wake County
DWQ Project #: 001390
2. Stormwater shall be directed to flow at non-erosive velocities across the entire protected stream buffers.
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 Hearings, 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 John Domey at 919-733-9646.
Attachment
Cc: Corps of Engineers Raleigh Field Office
Raleigh DWQ Regional Office
File copy
Central Files
Raleigh Division of Land Resources
Kevin Martin; Soil & Environmental Consultants
' ce el
Stevens'
Division of Water Quality • Wetlands/401 Unit
1621 Mail Service Center • Raleigh NC 27669-1621 .Telephone [phone] • FAX # [phone]
An Equal Opportunity Affirmative Action Employer
50% recycled/10% post consumer paper
APPROVAL OF 40lQuality Certification and ADDITIONAL CONDITIONS and Neuse River Buffer Rules
Hwy 70 LLC
12429 Falls of the Neuse Rd
Wake Forest, NC 27587
Dear Sirs:
You have our approval, in accordance with the attached conditions and those listed below, to place fill material in 300 linear
feet of streams for the purpose of constructing road crossings at US 70/Edenzer Church Road Collector Roads at Hwy 70 LLC, as
you described in your application dated October 31, 2000. After reviewing your application, we have decided that this fill is
covered by General Water Quality Certification Number 3289. This certification allows you to use Nationwide Permit Number 14
when the Corps of Engineers issues it. This approval is also valid for the Neuse River buffer rules (15A NCAC 2B .033). 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. 'Phis appLoval
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 except as modified below. If
you change your project, you must notify us and you may be required to send us a new application.. If the property is sold, the
new owner must be given a copy of this 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) (6) and (7). This approval shall expire when the corresponding Nationwide Permit
expires or as otherwise provided in the General Certification. For this approval to be valid, you must follow the conditions listed
in the attached certification and any additional conditions listed below.
1. 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 to notify the state in order to assure compliance for future wetland and/or water impact.
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).

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
DWQ Project No.: County:
Applicant:
Project Name:
Date of Issuance of 401 Water Quality Certification:
Certificate of Completion
Upon completion of all work approved within the 401 Water Quality Certification or applicable
Buffer Rules, and any subsequent modifications, the applicant is required to return this certificate to
the 401/Wetlands Unit, North Carolina Division of Water Quality, 1621 Mail Service Center, Raleigh,
NC, 27699-1621.This form may be returned to DWQ by the applicant, the applicant's authorized
agent, or the project engineer.It is not necessary to send certificates from all of these.
Applicant's Certification
I, , hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the construction such that the construction was observed
to be built within substantial compliance and intent of the 401 Water Quality Certification and Buffer
Rules, the approved plans and specifications, and other supporting materials.
Signature: -Date:
Agent's Certification
I, , hereby state that, to the best of my abilities, due care
and diligence was used in the observation of the construction such that the construction was observed
to be built within substantial compliance and intent of the 401 Water Quality Certification and Buffer
Rules, the approved plans and specifications, and other supporting materials.
Signature: Date:
If this project was designed by a Certified Professional
I, , as a duly registered Professional (i.e.,
Engineer, Landscape Architect, Surveyor, ect.) in the State of North Carolina, having been
authorized to observe (periodically, weekly, full time) the construction of the project, for the
Permittee hereby state that, to the best of my abilities, due care and diligence was used in the
observation of the construction such that the construction was observed to be built within substantial
compliance and intent of the 401 Water Quality Certification and Buffer Rules, the approved plans
and specifications, and other supporting materials.
Signature Registration No.
Date
Division of Water Quality • Wetlands/401 Unit
1621 Mail Service Center • Raleigh NC 27669-1621 *Telephone [phone] • FAX # [phone]
An Equal Opportunity Affirmative Action Employer
50% recycled/10% post consumer paper
`?•
woo
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
June 6, 2002
CORNERSTONE PARK
Raleigh, North Carolina
Ai? CARC'"fa
i ' SEAL
184°8

EXTENDED WETLA4+?DbItTENTION POND
TRACT 1 (FUTURE DEVELOPMENT)
Withers & Ravenel, Engineering & Surveying, Inc.
111 MacKenan Drive
Cary, North Carolina 27511
[phone]
[phone] fax
jt)
L+ JLW t 0 2UU1
R.? a #)?:, F?.
.l .' ? .. ?5 ? ..
ri {
?,' ? .. .... .., x .. .. F ... .?o
,... ? .. ,
EXTENDED WETLAND DETENTION POND
TRACT 1 (FUTURE DEVELOPMENT)
DESCRIPTION: The storm water management plan currently identifies tract 1 as an
undeveloped parcel of land within the Cornerstone Development. This tract is subject to the
nitrogen reduction requirements by the City of Raleigh Stormwater Ordinance as well as an
85% percent TSS reduction. An extended wetland detention pond is being proposed to
provide necessary treatment to achieve the requirements. Preliminary design sizing for an
extended wetland detention pond has been provided to ensure that adequate land area is
available on tract 1 for this storm water management device. The proposed development for
Tract 1 is a go-unit residential townhouse community. The impervious percentage of the
8.73 acres tract of land is approximately 42% requiring approximately 6,go.o, square foot
surface area for the extended wetlands. The detention portion of the wetlands will be
designed to capture the runoff from the first inch of precipitation and bypass larger storm
events directly to the stream. The proposed extended wetland is larger than required due to
zoning conditions issued by the City of Raleigh (attached).
_
\\ ?!
\\\\\\\ \ \ \ 111 /__ ?(??y? \ \\ ``\ \ ?R¦? W
t t \ t t t , \ \ \ 111 /': y?I \ * SMl? C] 0..
a,S?iD7-
t 1\ t , t t t B , ? © Y
/ tl tl t 1t 1t ? 1 t yl
1 1 I I t, I l tt, ?I 1 ?. `? I I ?? ? ? Q
r I I t t t 13331111 ;,, '? ,_:? I t ~<
i I I ; I I r I r
I N I } (,
//'// ? I 1 I I llj l a (]
/ ? ! I I ll?l? l? \ \ 1. Z Z
I I , 111?If 1 CC
! 1 I I I I I J
r, W
ck?
_-- / III 1 / 'I T
.?-? tp?TY l?l?lll? /, t cf`? .cl??t LG?WY?1]]]'.
II
---
-_
___ - III a _!
_ ---__?. ,wu ail . ,..? I?? .. .?..y5 , ? ¦i
C W
J --\ I il? rp{ 1 ?
? R
`SGS? ;6r L gY 1? i!r E ?
W
r
LLJ
- - r !
?F - ' !•
LLJ
r yi t{r?s, { 1!I if A° IIII : - , i i e yyy 'p+ E
flll ;; ;;;,'
b
R x ?d ri ilri?
Ni!
14n 11 t 'dl' d 't tt \_ = t? i
7 j,
III III R V II p1111 I , \ \ _ r r r p
"?;
II III \\? E p y !
• =_ :' ,I O?,I,i pal lpl ` ` \\\\;; _ -_-_- -- 1? xi ? 6?IItE! ? e 1 _ ?
Illlt II111 IIL.\ .,\\\? L__ f! ? k fee
n? ? _ __ 111
I i 11
I =W
Hill
a:ao f
am"
.: r r a : R
0
O
M
r
D
N
V
d
•O
L
a
U)
w

c
M
3
0
O

PR
t0 It

U
O

N
.d
L
d
N
N
G>
c
.? •C
C>
V
c N
=
C6
a U V

C co Q' V U
•i
(13

m a U)
(/) N N
L -0-0
d Q
Y N
C
n•a,
Y mL
N ?.
n
N CO a ? q "t 0
ca, d cm? 0'

d
a _ m
R n

wo wo wCU
IL
3- OD 0 CL
3- 00 0)
3
O
4a NO F-
ti ti mod>Ot?
> ti ti ?0jC
ON
L() CO
y y U) L

0 0 0 Q
t
O
M_
X 0 O
CL
x 0 O
a.
x 0
W CL x CV) W nd M W D A co
0W C) 0W ? O 0W oi O
w H r H - H
Z Z Z

O O w

v?
zz
O
E,0)
N
N
a

co
O
? O ?
v
.
'O C
L
n. N
ti
O

d

G

a
kO

w

i
Q4
r
v d1 d
w
6

0 V

c i
U
0 z Q W
c0
d ?_
L •? 0

C) y
E cu t:
ca -
Z can
a0i U
O

O (C d' N I*- N O (O N I-
O N
O d;
O (O
O ti
O 0)
O r
r N
r d
r (O
r
O m (O Nt N O W (n O M
N ?t CO O O ?- M 0 M
O O O O O r r r r r
d0 r
(M r
M 0
I- 0
0) 0)
O d)
N d'
cn (?
0p r
r
?~ O O O O r r r r N
.C

IZ
(D
D
O 0 0) M cn 0 0 00
C
0 0 M
0 O
0 M
0 O
r M
r LO
r I`
r r
N M
N

d
C
R
E.0 M
? O
t'-: f?
q tO O
f) r
I? Il-
O co
M (0
(O
0 0 0 0 0 .
r r r N N N

O m 0) co M M co Co co 0
v:
O ti
O o
r v
r l-
r 0
N •a;
N I'-
N r
M
O 0 I` d' M 0 0 co (0 d
to 0) M I- O It 00 co ti
M O O r r N N N M M

7
.O
•? L
0 4)
QO 0
r 0
04 0
M 0
10 0
L0 0
00 0
I,- 0
W 0
M
EU
0
rn
rn
U ?
CL 0
c E
E
E
m ?
m (n
F-
m
o
m 00
>
m 0
E
O
(
a °\n
W
Z O
O
a
2 as
O
U
? L
V? O R{ fn
0) Co Co N
O I- Ict
O O M
C
co 0 in LO
OD 1.- O
O O M
O
~? ONO (~G
O M
C
co O co ce)
r 0
O
cp 0 ('7 Wt
M p r d'
O C)
r O d'
O
o N
N (D Q M ?

? aoLo
? N
L
*
Q ?
R
co O -01- 0
co In M
_
O
° I^ C 00
co
a
II c
n
0
CD i
a
d II II (LC 11 LO II 11
V
m E O N Q

CO C O
0 (D
CL
a? s- ? >>
U)
?- 0 Q
0
O
0
N
N
a Q
p (
n Q 0 N
`

d
E m
n
d Q N
E
f
`t ?
-
0 :3
o co z cn
m
X
0
o
co
N
?I
c
O
U
N
U
N
E
0
U)
M O
N
O U
O N
N 0
CD
? w
(0
Na
OI
IL
v
L
F-
Y
R
a
d
?U
O Z
m rn
C .45
V w
N O
E as
t0 "?
Z
0U
21
a
Y
t0
O
a
E
L
O
N
L
O

E
L
_p
ti
c i?

CV ? fV U
(6
O V N ?
N
U
w 7
w
O
a:?

o

..
C .. p
0
v N •a ?
2
E
i C
co
0 Q cl
d cr C
a) (D
go
L
O w
li (D
t
0 r O
C O
p _O j
to
?+

p O

w d
V O
C C
C-
' N

Q
C
(a
E
fSf
EEC
V >

(n
O L asU
? N
y U 00 ?.
fQ N
O V N?
p O m L?
?+ N

O
Q
Q U? U')
C L
In
O
O w

0 C ? ti CO
C U 7 U rn
Qa' V
O ca
C :.a NO
O 'a O `-'ate
"a ?Ocq
O

u
a
o° -
C p U
U o y M
N o
11 ca
w ° u u V u c u
c api=

20 cv
Q 0) 0-0 v
L 0-0 a V
V
4 w C w L

? > m m 3 Co m
v v Emo't 4) C: U) ,cm c?o? d
N O D M d
2? Cc
U C. O m ca O R
J-
N II O r y C V r Q O p `+
O ? cn :3 U p d= C N w
p
o ai O C
L:3 *+ O
Q v m d m
CL 'G
m
O > O
4- p 1C L c N {O
-
(/?
p o L IlS
y p E c a? E
W O W
0 C
+, d U

Vi

a'

-CK 55 N

N? Q

co
ND'a
N
X
0
O
M
N
c
0
U
f0
U
a?
3
E
R
cn
a?
00
ch 0
N
O U
O 4)
N
O
4? 6
Co
aUi 0
21
a

L
t4
a
d
ov
0 Z
d C;)
VIt
ZI U)
o U
21
I1
(0
O
E
m
Of
co
LO
co
cc
O
Z
ol
0
to
d
Y
V
O
a
0

Q

0
a
co
to
?
f
0

O
0

t1?
CO
0

r-
O>
0

tD
D)
0

N
O

r--
o
?

N
?-
?

N
y

C r- 0 p O n O o o
O V ? r` 0 ao rn rn ?

Q

O R N
N to N
IV ti to
l' CD
O N
?O
O
O
11 11
N V
O O
O a
.E L.
Q a
£a
e
M
N
X
0
0
M_
O
N'
en
c
0
U
m
U
3
E
0
U)
. ,.. . ,
ORDINANCE (2001) 101 ZC 506
Z-58-01 - Glenwood Avenue, north side, east of Ebenezer Church road, being Wake
County Tax PIN 0777.02-76-9763. Approximately 8.73 acres rezoned to Thoroughfare
District Conditional Use.
Conditions dated: (10/01/01)
A. Only those uses permitted in 0&I-1 shall be allowed within the subject
area. Dwelling units within the subject area shall be limited to a
maximum of 120. Office uses shall be limited to no more than 285,209
square feet of floor area gross and a Floor Area Ratio (FAR) of no more
than .75.
B. The zoned area shall include a +/- 2.6 acre "Conservation Area." This
area shall be located along the frontage of US 70 and provided as
generally indicated on Zoning Exhibit Maps A and B. The said
"Conservation Area" will contain no amenities (other than paths and
trails), and shall be used for the purposes of open space and stormwater
management. The stormwater facility (described in Condition C below)
shall be located within this "Conservation Area and shall be located north
of the existing creek (see Exhibit A).
The area south of the existing stream located within the "Conservation Area" shall
remain undisturbed except for the following circumstances:
1) Required City road improvements, side slopes, rights-of-way and
slope easements installed along US Highway 70 and Country Trail;
2) Installation of stormwater and water quality control structure and
devices;
3) Removal of diseased, dead, dying or infested plant material;
4) Removal of noxious plant materials deemed detrimental to existing
vegetation;
5) City of Raleigh utility easements; and or
6) All side slopes for new road construction that meet minimum city
standards.
A minimum of 0.75 acres (32,670 square feet) of total +/- 2.6 acre "Conservation
Area" shall remain undisturbed and at least 55% of that acreage shall occur on the
south side of the creek.
C. A +/- 1.0 acre stormwater management facility shall be provided in
conjunction with any land disturbing activities conducted on-site. This
stormwater facility shall be located on-site within the Conservation Area
mentioned in Condition #B above. The facility shall be designed to meet
City of Raleigh Standards. Stormwater shall not be released from the
stormwater facility at a rate that exceeds the provisions of Certified
Recommendation 7107 of the Raleigh Planning Commission.
D. Along the entire frontage of US Highway 70 (as measured from the new
right-of-way) a fifty (50') foot wide landscape buffer shall be provided
(See also Zoning Map B). In those portions where vegetation does not
exist, and where the City Code allows its removal, the same area shall be
re-vegetated according to these standards.
For every fifty (50') linear feet of re-vegetated area there shall be:
Type of Material Quantity Size Minimums
Canopy Tree 8 3-1/2" caliper, 14'
height
Understory Tree 8 7.5' height
Shrubs 36 24" height
It shall be the purpose of this re-vegetation scheme to achieve a natural Piedmont
woodland appearance by using native plant species.
E. Public street access from this site shall, be obtained from Country Trail.
The exact nature of these points of ingress/egress shall be determined at
the time of plan approval for development of the site (see also Zoning
Exhibit Map A).
F. If the subject property is developed with non-residential use(s), there will
be a thirty (30') foot wide Type B Transitional Protective Yard along the
southeast property line with the Water Garden Office Park LLC (0777.02-
86-1245), except said yard shall not encroach upon the portion of said
property line within the defined "Conservation Area" described above in
Condition #B above.
Notwithstanding any provision in this condition to the contrary, if all or a portion
of the adjacent property Water Garden Property is combined with all or a portion
of this property, the requirements for this Transitional Protective Yard shall not
apply, nor shall the Transitional Protective Yard requirements herein apply to the
.- , .

extent that low-impact uses as defined in City Code Section 10-2082.9 (e) (3) are
developed on the Water Garden Property or portions thereof adjacent to the site.
G. All refuse containers, mechanical maintenance facilities, and HVAC
equipment shall be fully screened from public view and adjacent
properties. This screening may consist of evergreen plantings, walls and,
or fence materials. The materials shall be designed and constructed so
they are compatible with the principal building.
H. All site lighting and wall packs fixtures (other than street light fixtures and
city street lights within public rights-of-way) shall be directed downward
and shielded in such a way that no light source will be visible from
neighboring properties. All freestanding site lighting (located outside all
Transitional Protective Yards and street lighting described above) shall be
limited to a maximum height of twenty (20') feet.
1. A private vehicular and pedestrian cross-access easement will be offered
to Water Gardens Office Park LLC (see "Zoning Exhibit Map: Road
Systems and Access"). This cross-access easement shall connect to
Country Trail and shall not conflict with Condition #E above (i.e. no direct
access to US Highway 70). The exact location of this cross-access
easement shall be determined at the time of plan submittal.
J. Impoundment will be installed prior to any development on the site or
construction of Country Trail.
K. Where the approval process for Thoroughfare District conflicts with the
approval process for 0&1- 1, the 0&I-1 process shall prevail.
Adopted: 10/17/01
Effective: 10/17/01
WITHERS 0 RAVENEL
ENGINEERS 1 PLANNERS I SURVEYORS
ill MacKenan Drive I Cary, North Carolina z75u _
te1:919.469.3340 1 fax: [phone]oq
www.withersravenet.com 0 , U V
TO J' a l a 1 V ?
,,,ter
LEMEM OF MUSO a M L
D
U w, ee , 17 71 JOB NO.
ATTE ?L
RE
? w_

> WE ARE SENDING YOU ? Attached ? Under separate cover via the following items:
? Shop drawings ? Prints ? Plans ? Samples ? Specifications
? Copy of letter ? Change order ? Diskette ?
COPIES DATE NO. DESCRIPTION

THESE ARE TR MITTED as checked below:
For approval ? Approved as submitted
? For your use ? Approved as noted
> ? As requested ? Returned for corrections
? For review and comment ?
? FOR BIDS DUE
REMARKS
? Resubmit copies for approval
? Submit copies for distribution
? Return corrected prints
20 ? PRINTS RETURNED AFTER LOAN TO US
COPY TO 14
40% Pre-Consumer Content • 10% Post-Consumer Content SIGNED: 614
If enclosures are not as noted, kindly notify u +t once.
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan Klimek, P.E., Director
Division of Water (duality
June 12, 2002
Highway 70 LLC
12429 Falls of the Neuse Road
Wake Forest, NC 27587
Subject: Stormwater Management
Highway 70 LLC
Wake County, NC
DWO# 001530
Dear Madame/Sir:
This Office is in receipt of the plans dated June 6, 2002 for the stormwater management facilities
consisting of an extended detention wetlands for lot 1, dry detention basins followed by a forested filter strip for
lot 2, a dry detention basin followed by a forested filter strip for lot 3, pocket wetlands for lot 4, a dry detention
basin followed by a forested filter strip for lot 5, grassed swales followed by detention and a level spreader for
lot 6, 4 extended detention wetlands for lot 7, 3 level spreaders for lot 8, an extended detention wetland for lot
9, 2 extended detention wetlands for lot 10, extended detention wetlands and a level spreader for let 12, and
extended detention wetlands for lots 11 and part of lot 14 at the subject facility prepared on your behalf by
Withers and Ravenel and submitted to the Division on June 10, 2002. Staff from the Wetlands Unit reviewed
the plans and found them acceptable. =Tease note that this approval shall not be construed as an.approvai of
the dam design for Dam Safety purposes.
If you have any questions regarding this matter, please contact Mr. Todd St. John at [phone].
nds Unit Su
cc: Mr. Todd St. John, Wetlands Wy
Steve Mitchell, Regional Office
John Holly, Raleigh Regional Office
Ken Jesneck, PE, Withers and Ravenel, 111 MacKenan Drive, Cary NC 27511
File
Wetlands Certification Unit,
>-1650 (Mailing Address)
i0 (Location)
ittp://h2o.enr.state.ne.us/ncwettands,'
F V\1 A (F
or'U ?'°R??.
?I
O '<
0w
WFFI
June 6, 2002

CORNERSTONE PARK
Raleigh, North Carolina
q y
SEAL
°°°°°rrrrrrirrr
N CAR0
•0! • •eaoo••• ® ? dam
••.•?FESSIO e•9
SEAL ?V:
15423
• ? o
POCKET WETLAND DETENTION POND
TRACT 4 (FUTURE DEVELOPMENT)
Withers & Ravenel, Engineering & Surveying, Inc.
111 MacKenan Drive
Cary, North Carolina 27511
(919) 4693340
[phone] fax

?.->..
_4 ':tit. S..
y e,? ? + Y l'; 't r
POCKET WETLAND DETENTION POND
TRACT 4 (FUTURE DEVELOPMENT)
DESCRIPTION: The storm water management plan currently identifies tract 4 as an
undeveloped parcel of land within the Cornerstone Development. Preliminary design sizing
for a pocket wetland detention pond has been provided to ensure that adequate land area
is available on tract 4 for this storm water management device. The combination of the
pocket wetland and Neuse River Riparian buffer located downstream of the wetland will
provide 85% TSS removal. Preliminary design calculations are provided on the proceeding
pages. Upon the development of Tract 4, final design plans and calculations shall be
provided to NCDENR Division of Water Quality.
_ I ./ / I - -? L-
/
I l I
ix ir
UNMW
I \ U 20' an ,' omm
\ 2Yt1GHE? + I// ' lam" ?-
I
I
II
I
I
I
I ?/ O
I '
I I I I' t '/ ? (I
to
I i I {
I I I ' '/ ' \ I
I I 1 + /
I I + ,
I I II ? ? ;
I , I ? I I I /
1 I I I I I / U
+ + I I I /
1 + I I l r /
! I I I ,' ? ? O
? , ?QQ1 / I I , o
??-
/
r /
-- / t ?
20' STORM /
DRAW" /
WOW/
M820001 2ZW
\ \
yEl
.s
k?.
HEM \\ ._ ?? 21+00
-I-' - _-??? 22+00 _ ---
21+00 - - - -- . "?
E
0
U
N
N
6
N
J
3
W 3
O
Z {n
o0
?- I
W `°
W
0)
Q VI o
O
M
M
I
0C 0)
W
Z
J
N
0
#
Ix °
a
W W LLI L)
r
_ - o
Z L
z
t9 '?
Z L)
W ;
c
0
c
N
Y
U
Cornerstone Park
Pocket Wetland Detention Pond - Tract 4 (Future Devel
Elevations
Basin Botton Elevation 462.5 ft.
Permanent Pool Elevation 464.0 ft.
Crest Elevation 466.0 ft.
Top of Dam Elevation 468.0 ft.
Permanent Pool Surface Area Req'd. 621 sq.ft.
Drainage Area 1.90 ac.
Impervious Area 1.33 ac.
%Impervious 70%
Other Parameters
Design Rainfall 1 in. runoff
Drawdown Device Skimmer
Min. Drawdown Time Req'd. 48 hrs.
Min. Detention Volume Req'd. 4690 cu.ft.
Detention Volume Provided 5148 cu.ft.
EXTENDED WE
Project Name:
City / State:
Project Number:
Date:
TLANDS DETENTION POND
Cornerstone Park
Tract 4 (Future Development)
Raleigh, NC
200147
6-Jun-02
ON-SITE DRAINAGE AREA DESCRIPTION
Basin #1
Watershed Area (ac.)
Paving, Sidewalk, Driveways 0
Office Bldg., Parking, Etc. 1.28
Estimated Pond Area 0.05
Lawn 0.57
Total (DA) = 1.90
IMPERVIOUS SURFACE AREA CALCULATION
Total on-site impervious surface areas (ISA) = 1.33 ac.
% impervious surface area (%ISA) = 70%
SURFACE AREA OF PERMANENT POOL
Go to Table 2.3 and find the number corresponding to the impervious surface
percentage calculated (0/61SA).
SA/DA ratio = 0.76%
Minimum pond surface area (SA) = (DA * SA/DA ratio)/100
SA = 0.014 ac.
or 621 s.f.
SA provided = 1950 s.f.
1-INCH RUNOFF VOLUME CALCULATION
Using the runoff volume calculations in the "Simple Method" as described by Schueler (1987)
Rv = 0.05 + 0.009(1)
where, Rv = Runoff coefficient, in./in.
I = Percent impervious
Rv = 0.68 in./in.
Ttotal runoff volume from 1-inch precipitation
Runoff Volume, S = (Design Rainfall) (Rv) (Drainage Area)
Runoff Volume = 0.11 acre-ft
or 4,690 cu.ft.
The total runoff volume must be stored in the pond and be
released in a period of two to five days by an inverted siphon drain.
Set the crest of the primary riser structure so that the total runoff volume is retained.
Using the stage-storage function, the crest elevation can be determined as follows:
Basin #1
S = Ks(Z^b)...... see stage storage function
S = Detention Volume, cu.ft.
Z = Stage, ft.
Ks = 2236.7
b = 1.231
S = 4,690 cu.ft.
Z = 1.82 ft.
Z used = 2.00 ft
Riser structure bottom elevation = 464.00
Riser structure crest elevation = 466.00
c
a?
Ck.
O
N
3
w
eF
W
F-
c
a°
c
0
C
0
N
a
0 cc
U
z 0
?+ t O
0) CU LM N
E v 20
0 o M
UO.W?-
Z
O
U
Z
D
U.
W
0
W
C4
Q
F-
O CO sr
LO co 0
w LL oho
N
N 0 Ci) 0

Z O 0) CA
a cq q
J O O V-
UI 0 w co
NvI-
Z l•: UC o
J r 00 0)

LLJ
~ W
goy ?v?n
F- (A
O
Z
U O CN
N ui 00
O
>
VU

Q
J
W
UJ M LA CA
w~J
O 7
U N0 00c
CNNM
O
>
UU
Z

?Ow ? UV) LO 0)
M0
wZOQ ?j NN CO
Q U

M
?
0 0
0
LO LO
dl to C \L
z0< co e-NM0
U
w
O
FN Ii O?-NM

U
?Z
?O
co co

>
z
?
O
J
U W
ti
t CO 0
N C NI YNr
a n u
co
Y
A
n 11U)-0 w v
TN.-CO NCD
I- N O 0
[? ? O O
c
0
F- E

a.
Q Q w
0
O
Z
O

•- ?-
O
L

t? c c
D
0
W
W a !E

co a
L
co CU
Z)
W o V c cn
0x cow
Ken Jesneck
Withers and Ravenel
111 MacKenan Drive
Cary, NC 27511
Dear Mr. Jesneck:
May 30,.z
Lj
Michael F. Easley
Governor
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
_ Gregory J. Thorpe, Ph.D., Acting Director
-U1 Division of Water Quality
0,
Subject: Highway 70 LLC
DWQ Project No. 001530
Wake County
4
d? v
COO2
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
1. Dry Detention Basins
Staff will review the extended detention wetland design for lot 1 upon receipt.
The level spreader for dry basin no. 2 is located in the future road way fill as well as within the 50 foot buffer. The
level spreader needs to be located outside the entire 50 foot buffer. Also, please discuss the fact that the dry basin
may be eliminated by the road way in the future. Finally, the discharge of the level spreader appears to flow in the
exact same area as the bypass discharge. This would circumvent the purpose of the bypass.
2. Level Spreaders
A portion of the level spreader for lot 8 is located within the 50 foot buffer. The level spreader needs to be located
outside the buffer.
3. Drainage Area
The fate of the runoff from portions of lots 1, 2, 3, and 6 and all of lot 4 is unclear. The runoff from these areas must
also be addressed.
Division wetlands unit staff will strive to complete a final technical review within 10 working days of receipt of the
requested information. If you have any questions or would like to discuss this project, please contact me at (919) 733-
9584. Also, please note that the NCDENR Stormwater Best Management Practices Manual, April 1999, and other
documents and information can be downloaded from the Wetlands Unit web site at
http://h2o.ehnr.state.nc.us/ncwetlands/.
Sincere,
Todd. #StJohn, P
Environmental Engineer
cc: Raleigh Regional Office
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 (Location)
919-733-1786 (phone), 919-733-6893 (fax), hftp://h2o.enr.state.nc.us/ncwetlands/
0 w
b j JUN 1 0 ?I f'
June 6, 2002
.............. .......... . . .?. . .......
.... .
CORNERSTONE PARK
Raleigh, North Carolina
,`ao®'a'®eaeoeeso,?
•s
®® ARO?
a°j
®®bb ®i??®a[ooooSa°1q. .I
SEAL
? 15423
s ° o s
GINE??®•??
o ? °oaaaea°0
e
nn 0
?T
JAYM1 ?
ooaeo6A B9q'6? ?oOE
0 v
SEAL
DRY DETENTION
TRACT 6
Withers & Ravenel, Engineering & Surveying, Inc.
111 MacKenan Drive
Cary, North Carolina 27511
(919) 4+69-3340
[phone] fax
EXTENDED DRY DETENTION
TRACT 6
DESCRIPTION: The storm water management plan for Tract 6 consists primarily of three
types of devices.
LEVEL SPREADER: A grass level spreader has been designed at storm drainage outlet pipe
FES603. The function of the device is to provide diffuse flow through the Neuse River
Riparian Buffer located immediately downstream of the level spreader.
GRASS SWALES: Grass swales have been provided behind the rows of town home units as
shown on the plans. The swales normally provide long-term water quality protection in
terms of nitrogen and TSS removal.
DRY DETENTION: Most of the on-site storm water runoff is conveyed to an area where a dry
detention facility is proposed. A rip-rap rock dam is proposed to span across a channel.
The facility will detain storm water for a short period of time to reduce the peak flows in the
receiving water. The basin will dry out between storms. The detention facility will achieve
some TSS removal before it is discharged into the Neuse River Riparian Buffer located
downstream.
RIP RAP ROCK DAM CALCULATIONS
Project Name: Cornerstone Park
Tract 6
City 1 State: Raleigh, NC
Project Number: 200147
Date: 6-Jun-02
DRAINAGE AREA DESCRIPTION
Watershed Area (ac.)
Tract 6 dwellings, streets, etc. 1.72
Tract 6 lawn areas 1.53
Tract 4 office building, parking, etc. 1.33 (future development)
Tract 4 lawn & tree preservation 0.57
Off-site woods 2.3
Total 7.45
IMPERVIOUS SURFACE AREA CALCULATION
Total impervious surface areas (ISA) = 3.05 ac.
% impervious surface area (%ISA) = 41 %
m
F
cv
a?
?¢
a. c
o •°- U
c c Z
L O
EN
o
U??cfl
z
O
U
Z
W
W
w
t7
a

C0
y- r CO I- CO
N r I-- M
V- LO 01)
w ?- rno
po
N T- N CV IW
N OMOCMC
00) OD
Z O c0 p M
J p p r r
t/
) oil- (N m
v
Z co M M co
MCROoC4
I-W LO co I-
O
F- w
o m OD co
o?
?Z co
0 3 co0)
N
X0
> U
VU

a
J
ZO? LL t-LO

2 :D
uiz00

U p
))
,. N??
UU>
z
wIX
?Ow ll. P- LO co
c
OD

wZ?
>0 °C

U o
-
r CV tnr
V"i
av

= d »-
V- 0)
C%j oo co

O Q

co ocoo
o
O
r M 1?

U
W
aN LL Or CV Md'

Cf)
?Z
?o
Zj ccooCp?MMM
d It d' "W w
Ow
w
F4 st aro
LO 04
11 11 11
U Y
A
i i
co
O
M N r I?
Mr LOP
M w v O)
oUn orn
v04 00
c
0
m
E

w
0 0 0 '~
0
Z
o v

a `o
cn :.LD W a
CO rr V p
W o U CO
w U X :°
U
Cornerstone Park, Tract 6 - Raleigh, NC
Rip Rap Rock Dam
COMPOSITE RUNOFF COEFFICIENT, Cc
DRAINAGE RUNOFF
SUB-WATERSHED AREA COEFFICIENT
Ai Ci AiCi
Tract 6 dwellings, streets, etc. 1.72 0.95 1.63
Tract 6 lawn areas 1.53 0.22 0.34
Tract 4 office building, parking, etc.* 1.33 0.95 1.26
Tract 4 lawn & tree preservation 0.57 0.22 0.13
Off-site woods 2.3 0.22 0.51
A = 7.45
Cc = 0.52
02 = 22.27
Q10 = 27.91
ac
cfs
cfs
* future development
Rip Rap Rock Dam Summary
Top of Dam Elevation
Top of Dam Width
Top of Dam Weir Length, L
HW Elevation for 10-year Storm
Storage Available Upstream
439 ft.
5 ft.
25 ft.
439.52 ft. Using Weir Eq., Q=3.OLH^1.5
2,066 cu.ft.
Cornerstone Park - Tract 6
Worksheet for Trapezoidal Channel
Project Description
Worksheet Trapezoidal Channel
Flow Element Trapezoidal Channel
Method Manning's Formula
Solve For Channel Depth

Input Data
Mannings Coeffic 0.040
Slope 050000 ft/ft
Left Side Slope 4.00 H : V
Right Side Slope 4.00 H : V
Bottom Width 3.00 ft
Discharge 27.91 cfs
Results
Depth 0.81 ft
Flow Area 5.1 ft'
Wetted Perim( 9.72 ft
Top Width 9.52 ft
Critical Depth 0.94 ft
Critical Slope 0.027702 tuft
Velocity 5.47 We
Velocity Head 0.47 ft
Specific Enerc_ 1.28 ft
Froude Numb, 1.32
Flow Type 3-upercritical
Cass
. al/®Ala?? a4v.P-J
?atr'
rs Pig ? ?x
e4coyo7el Jr19DZ
12
4,4&>
Project Engineer: Withers & Ravenel
iA... projectsicomerstone\tract6lchannel.fm2 Withers 8. Ravenel FlowMaster v6.1 [614k]
06/06/02 02:51:01 PM 0 Haestad Methods, Inc. 37 Brookside Road Waterbury, CT 06708 USA [phone] Page 1 of 1
' ?? . i ? ? i ?l ? /? / /?/ , ? ? r >r,' ,' i,/,/ ?i/; ? ??__ `__??;/,??///; /•-,. +1 \ \1 I I I i ? rl('i r rl
,/ // i 1 // 1 I! i• -\ , ?/0 '?///// /???/yyy/?---- ?``= __ _- `\ \ I I I I I I I I I f I I 1 1 1
_„.n? I tai I I I r / ?? \\ X?("r?, \ ? ('") \ a 1 (SN o \ \ ??
_`\n S/?SL I ? I I I 1 I °Z \ `?`,Q'r(,-,y?\ ? o\o ?- 1 rn,N m \
oil mr+- f \ 1 \ `
/ CD,
'CD
I I \ \ \
---- -co
++ J J
OR Iles I
cog
\ M \ \ t / `? 1 , ?\ r \
*M Ico /10 1
\` \f \\ 1 I v %? 11 1 ` /// L m I I N \ 3 _M I x
\ \ \
e
;pv o
Design Procedure For Rlprap-Lined Channels
This design of riprap-lined channels is from the National Cooperative Highway Research Program Report No. 108,
entitled ".Tentative Design Procedure for Riprap-Lined Channels." It is based on the tractive force method and
covers the design of riprap in two basic channel shapes, trapezoidal and triangular.
NOTE: This procedure is for the uniform flow in channels and is nW to be used for design of riprap de-energizing
devices immediately downstream from such high velocity devices as pipes and culverts. See the
Standard and Specification for Storm Drain Outlet protection.
The method in Report No. 108 (design procedure beginning on p. 18) gives a simple and direct solution to the
design of trapezoidal channels including channel carrying capacity, channel geometry and the riprap lining. The
publication is a very good reference and design aid.
The procedure presented in this Appendix is based on the assumption that the channel is already designed and
the remaining problem is to determine the riprap size that would be stable in the channel. The designer would first
determine the channel dimensions by the use of Manning's equation. The n value for use in Manning's equation
is estimated by estimating a riprap size and then determining the corresponding n value for the riprapped channel
form Curve 1, below.
Curve 1 - Manning's "n" for Riprap-Lined Channels
n = 0.0395(d50)1/6

0.05 -
c a

0.04
0
o c _
-
a a? -

0.03

b? w

w
-H a)

--
v j

0.02

1 2 3 4 5 6 8 10 20 30
Median riprap size, dS0' inches
1471
0 3 ?y
An
Appendices
Table 8.05g
Permissible Shear Stresses
for Riprap and Temporary
Liners
Permissible Unit Shear Stress, Td
Lining Category Lining Type (lb/ft)
Temporary Woven Paper Net 0.15
Jute Net 0.45
Fiberglass Roving:
Single 0.60
Double 0.85
Straw with Net 1.45
Curled Wood mat 1.55
Synthetic Mat 2.00
d5o Stone Size (inches)
Gravel Riprap 1 0.33
2 0.67
Rock Riprap 6 2.00
9 3.00
12 4.00
15 5.00
18 6.00
21 7.80
24 8.00
Adapted From: FHWA, HEC-15, April 1983, pgs. 17 & 37.
Design Procedure- The following is a step-by-step procedure for designing a temporary liner for a
Temporary Liners channel. Because temporary liners have a short period of service, the design Q
may be reduced. For liners that are needed for six months or less, the 2-yr
_ frequency storm is recommended.
Step 1. Select a liner material suitable for site conditions and application.
Determine roughness coefficient from manufacturer's specifications or Table
8.05e, pg. 8.05.10.
Step 2. Calculate the normal flow depth using Manning's equation (Figure
8.05d). Check to see that depth is consistent with that assumed for selection of
Manning's n in Figure 8.05d, pg. 8.05.11. For smaller runoffs Figure 8.05d is
not as clearly defined. Recommended solutions can be determined by using the
Manning equation.
Step 3. Calculate shear stress at normal depth.
Step 4. Compare computed shear stress with the permissible shear stress for
the liner.
Step 5. If computed shear is greater than permissible shear, adjust channel
dimensions to reduce shear or select a more resistant lining and repeat steps 1
through 4.
Design of a channel with temporary lining is illustrated in Sample Problem
8.05b, pg. 8.05.14.
Rev. VJ93 8.05.13
n
Table 8.05f Manning's Roughness Coefficient
n-
Lining Category Lining Type
Rigid Concrete
Grouted Riprap
Stone Masonry
Soil Cement
Asphalt
Unlined Bare Soil
Rock Cut
Gravel Riprap 1-inch (2.5-cm) D50
2-inch (5-cm) D5o
Rock Riprap 6-inch (15-cm) D50
12-inch (30-cm) D5o
n value for Depth Ranges
0-0.5 ft 0.5-2.0 ft 2.0 ft
(0-15 cm) (15-60 cm) (> 60 cm)
0.015 0.013 0.013
0.040 0.030 0.028
0.042 0.032 0.030
0.025 0.022 0.020
0.018 0.016 0.016
0.023 0.020 0.020
0.045 0.035 0.025
0.044 0.033 0.030
0.066 0.041 0.034
0.104 0.069 0.035
-- 0.078 0.040
Note: Values listed are representative values for the respective depth ranges. Manning's roughness coefficients, n, vary with the flow depth.
DETERMINING SHEAR STRESS
Shear stress, T, at normal depth is computed for the lining by the following
equation:
T=yds
Td = Permissible shear stress
where:
>.
T = shear stress in lb/ft2
y = unit weight of water, 62.4 lb/ft3
d = flow depth in ft
s = channel gradient in ft/ft.
If the permissible shear stress, Td, given in Table 8.05g is greater than the
computed shear stress, the riprap or temporary lining is considered acceptable.
If a lining is unacceptable, select a lining with a higher permissible shear stress
and repeat the calculations for normal depth and shear stress. In some cases it
may be necessary to alter channel dimensions to reduce the shear stress.
Computing tractive force around a channel bend requires special considerations
because the change in flow direction imposes higher shear stress on the channel
bottom and banks. The maximum shear stress in a bend, Tb, is given by the
following equation:
Tb = KbT
where:
Tb . = bend shear stress in lb/ft
Kb = bend factor
T = computed stress for straight channel in lb/ft2
The value of Kb is related to the radius of curvature of the channel at its center
line, Rc, and the bottom width of the channel, B, Figure 8.05e. The length of
channel requiring protection downstream from a bend, Lp, is a function of the
roughness of the lining material and the hydraulic radius as shown in Figure
8.05f.
8.05.12
Rev. 17J93
} 0 , w A 7-F9 Michael F. Easley
?O? QG Governor
William G. Ross, Jr., Secretary
j i Department of Environment and Natural Resources
CO
Gregory J. Thorpe, Ph.D., Acting Director
Division of Water Quality
May 10, 2002
Ken Jesnic
Withers and Ravenel
111 MacKenan Drive
Cary, NC 27511
Subject: Highway 70 LLC
DWQ Project No. 001530
Wake County
Dear Mr. Jesnic:
The Wetlands Unit staff reviewed the stormwater management plans for the subject project and determined that additional
information is necessary to complete the technical review process. The required additional information is as follows:
Dry Detention Basins
Dry Detention basis are not considered to remove nitrogen. As such, the discharge must flow in a diffuse manner
through the entire 50 foot buffer. In some cases it is allowable to discharge the runoff from a 1" rain in a diffuse
manner through the entire buffer and by pass larger discharges. No rip rap dissapators or other hard structures can
be placed in the buffer in association with a dry basin except as part of an approved bypass system. Please revise
the plans to reflect these requirements
2. Level Spreaders
Level spreaders should be designed to provide diffuse and non-erosive flow of the runoff associated with a ten year
storm event. Typically a level spreader should be 100 feet long for every cfs of discharge for forested areas without
dense undergrowth and 13 feet for areas with dense ground cover. Please revise the plans to accommodate these
parameters.
3. Wetland Vegetation
Cattails should not be planted in the stormwater wetlands as they may overtake other wetland vegetation before it
becomes established. They will volunteer on their own. Please revise the planting plans to exclude planting of
cattails.
4. Wetlands Forebay and Micropools
Each extended detention wetland must include a forebay and a miropool at the outlet that are at least 18" deep
minimum. Each of these features should be approximately 15% of the surface area. These areas are important
during dry weather conditions as habitat for creatures that consume mosquitoes and mosquito larvae.
5. Drainage Area
Please delineate the drainage area including any offsite drainage to each of the stormwater BMPs.
Division wetlands unit staff will strive to complete a final technical review within 10 working days of receipt of the
requested information. If you have any questions or would like to discuss this project, please contact me at (919) 733-
9584. Also, please note that the NCDENR Stormwater Best Management Practices Manual, April 1999, and other
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), 919-733-6893 (fax), http://h2o.enr.state.nc.us/ncwetiands/
Page 2 of 2
documents and information can be downloaded from the Wetlands Unit web site at
hftp://h2o.ehnr.state.nc.us/ncwetiands/.
Sincerely,
?w
Todd St. John, PE
Environmental Engineer
cc: Raleigh Regional Office
File
TO:
WITHERS & RAVENEL
ENGINEERING & SURVEYING, INC.
1 1 1 MacKenan Drive
CARY, NORTH CAROLINA, 27511
(919 469-3340
FAX [phone]
NCDENR - DWQ
LEU7 a OF MMBXMz? L
DATE,. 04/03/02 JOB NO. 200147
RE: Cornerstone Park
ATTENTION: Todd St. John
PHONE #: UU. U U ib
AP
R
WE ARE SENDING YOU ® Attached ? Under separate cover via
Q Shop Drawings Prints Plans ? Samples
? Copy of Letter ? Change order ? Diskette ?
the following items:
? Specifications
COPIES DATE NO: DESCRIPTION
1 Storm water management plan & mantenance manual w/ calculations
THESE ARE TRANSMITTED as checked below:
® For approval ? Approved as submitted ? Resubmit-copies for approval
® For your use ? Approved as noted ? Submit-copies for distribution
? As requested
? Returned for corrections ? Return-corrected prints
? For review and comment ?
? FOR BIDS DUE 20 ? PRINTS RETURNED AFTER LOAN TO US
.ti
i?
COPY TO: SIGNED: Jerry Jensen
if nnrlnanroa wrn »nf ua nnfnl lrm.lly nnfifv na uh n»ra
STORM WATER MANAGEMENT PLAN STATUS
Subject: STORM WATER MANAGEMENT PLAN STATUS
Date: Fri, 26 Apr 2002 14:20:48 -0400
From: "Ken Jesneck" <[e-mail]>
To: <[e-mail]>
CC: "Jerry Jensen" <[e-mail]>
CYNDI,
I WOULD LIKE A STATUS ON THE STORM WATER MANAGEMENT PLAN FOR DWQ#001530 & DWQ 001390.
TNAK YOU VERY MUCH.
Ken Jesneck, PE
WITHERS & RAVENEL
111 MacKenan Drive * Cary, NC 27511
919.469.3340 * fax
[e-mail]
www.withersravenel.com
i
j' >I
6C,) -11
rte, 4 I
}r1v
iS
GJ
l
1 of 1 4/29/02 10:10 AM
Wetlands Trackig
r
Facility Name Highway 70 LLC I County Wake
Project Number 00 1390 County2

OInactive t
?
Region Raleiol

Project Type purpose of road cunstructiOn DCM Office
Location UT Turkey Creek I COE Office kadci¢h

t .
1s Last Total Total Total
Total Mit
Recvd Sent to Recvd Action 401 401
Mit
Acres
Recvd From Date Region Region Date Last Action Acres Feet
Feet : ,.
?
- . • ? 401
,
., 401 _

Total. for Project: 300.001- 1

Inspectionss,Violatiorts,

Inspection Date Inspector Compliant Letter Type Date Sent Reply Date Current St
n I
t
k w
i n c
.

a

?Vl

Wetlands Tracking [I r- .
County «'ake
fig:: I
County2
Region Raleigh
0
DCM Office
COE Office Raleigh
-- Last - Total Total Total
Recvd Sent to Recvd Action 401 401 Total Mit' Mit.
Acres

Facility Name Cornerstone Park (Almo Property)
Project Number 00 1530
O Inactive
Project Type puipuse vj construction i devel?)ptnernt
Location UT
Turkey Creek
J,
Inspections/ 'Violations
Inspection Date Inspector
f.

)?b \\55 OeA
't Feet
MEMORANDUM
TO: John Dorney Regional Contact: Matt Flynn
Non-Discharge Branch WO Supervisor: Ken Schuster
Date:
SUBJECT: WETLAND STAFF REPORT AND RECOMMENDATIONS
Facility Name Highway 70 LLC
Project Number 00 1390
Recvd From APP
Received Date 11/1/00 Recvd By Region
Project Type road construction"
County Wake
County2
Region Raleigh
Certificates Stream
Permit Wetland Wetland Wetland Stream Class Acres Feet
Type Type Impact Score Index.. Prim. Supp. Basin Req. Req.
O Y O N 27-33-2 NSW 30,402. 0.02 300.00
F 14 HWF ?
NBR F 77-* ? F_ F_ F_1__ F_ F- F-
-r
F-F-7T _0N Mitigation Wetland
MitigationType Type Acres Feet

Is Wetland Rating Sheet Attached? Q Y O N Did you request more info? Q Y O N
Have Project Changes/Conditions Been Discussed With Applicant? Q Y O N
Is Mitigation required? Q Y Q N Recommendation: Q issue 0 Issue/fond O Deny
Provided by Region: Latitude (ddmmss) 355311 Longitude (ddmmss) 784411
cc: Regional Office Page Number 1
Central Office
Comments:
1 R003 should be realigned to cross the unamed tributary at a perpendicular angle. - LW:L
Facility Name Highway 70 LLC County Wake
Project Number 00 1390 Regional Contact: Matt Flynn
Date:
Comments (continued from paged):
cc: Regional Office
Central Office Page Number 2
State of North` Carolina
Department of Environment
and Natural Resources •
Division of Water Quality..;
James B. Hunt, Jr., Governor
NC ENR
Bill Holman, Secretary NORTH CAROLINA DEPARTMENT OF
Kerr T. Stevens, Director ENVIRONMENT AND NATURAL RESOURCES
j(-j va
)&6 County
WQC 401 Project # D01370
APPROVAL of 401 Water Quality Certification and Neuse River Buffer Rules
covi-.
Dear Mt
You have our approval, in accor/cewith the attached conditions, to in
wets r-stcrs for the purpose of as you described in your application dated
After reviewing your application, we have decided that this fill is covered by General Water
Quality Certification Number. This Certification allows you to use Nationwide Permit Number
when the Corps of Engineers issues it. his approval is also valid for the Neuse River buffer rules (15A NCAC 2B
0233). In addition, you should set 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 send us a new application. If the property is sold, the new owner must be given a copy of
this Certification and approval letter and is thereby responsible for complying with all conditions. This approval shall
expire when the corresponding Nationwide Permit expires or as otherwise provided in the General Certification. 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 150B of the North Carolina General Statutes to the Office of Administrative Hearings, P.O. Box 27447. Raleigh.
N.C. 27611- 7447. This certification and its conditions are final and binding unless you ask for a hearing, v
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 John Dorney at 919-733-9646.
Sincerely,
Kerr T. Stevens
Attachment &4- cc: o s of Enginers wRField Office
DWQ Regional Office
File C , y
Central Files Itr
Kull,,
Division of Water Quality Non Discharge Branch
i 621 Mail Service Center Raleigh NC 27669-1621 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer • 50';'o recycled/! 0% post consumer paper
http.//h2o.enr state.nc.us!wetiandc.html
DWQ Project #:
®01390
TRIAGE INFORMATION
US70/Ebenezer Church Road Collector Roads (11002 &R003)
Highway 70 LLC
Project Type road crossing
Permit Type 14
Stream Name UT to Turkey Creek
River Basin (#) 030402
Stream Index (#) 27-33-2
Stream Class C NSW
Wetland Impact 787 sq. ft. (0.018 acre)
headwater scrub-shrub wetland
50 sq. ft. (0.001 acre) linear wetland
Total 837 sq. ft. (0.02 acre)
Water Impact 150 linear feet at each of 2 crossings
R002 466 sq. ft.
R003 450 sq. ft.
Total 916 sq. ft. (0.021 acre)
Total jurisdictional impact
(wetlands & waters)
1753 sq. ft. (0.040 acre)

PAYMENT
RECEIVED
WTI tlru"?, GR??ra
tit 17
r?
' J{0_°v?'i .F
Environmental Consultants, Inc.
Road - Raleigh, North Carolina 27614 - Phone: [phone] - Fax: [phone]
This is a request for a 401 water quality certification to cover 0.04 acre of wetland
and stream channel impacts, which includes 300 linear feet of stream channel
impact. Therefore, a check for $475 is enclosed.
October 31, 2000
NCDENR-DWQ US Army Corps of Engineers
Attn: Mr. John Dorney Attn: Ms. Amanda Jones
4401 Reedy Creek Road 6508 Falls of the Neuse Rd., Ste. 120
Raleigh, NC 27606 Raleigh, NC 27615
RE: Nationwide Permit/401 Water Quality Certification/Buffer Compliance Request
US70/Ebenezer Church Road Connector Roads
Raleigh, Wake County, North Carolina
(Latitude/Longitude: 35°53'09" N 78°44' 10" W)
S&EC Project #: 00-5268
Dear Mr. Dorney and Ms. Jones:
On behalf of Highway 70 LLC (property owner), we hereby request authorization from
the US Army Corps of Engineers to use Nationwide Permit 14 to cover permanent
impacts to stream channels and wetlands resulting from construction of two collector
roads. We also request written concurrence from the NC Division of Water Quality (NC-
DWQ) that the project complies with the 401 Water Quality Certification associated with
Nationwide Permit 14 and Neuse River Basin buffer rules. A Pre-construction
Notification Application (PCN) is attached, which includes an agent authorization form.
The proposed project consists of construction of two collector roads (R002 & R003).
R002 begins at Ebenezer Church Road approximately 1000 feet north of its intersection
with US 70, runs generally east for approximately 1800 feet, and connects to R003.
R003 begins at US 70 approximately 800 feet southeast of its intersection with Ebenezer
Church Road, runs generally northeast for approximately 1400 feet, and connects to
Wetland Delineation/Permitting/Mitigation Soil/Site Evaluations On-Site Septic Systems Environmental Assessments/Audits
Neuse Basin and Watershed Buffer Evaluations Groundwater Hydrology Endangered Species
Western Branch Offices: [phone] - [phone] - [phone]
October 31, 2000
S&EC Project #: 00-5268
Page 2 of 3
R002. Please refer to the attached map (Figure 1) for the location of the proposed
collector roads on a USGS topographic quadrangle.
S&EC delineated the wetlands and jurisdictional waters present on the property crossed
by the proposed collector roads in September and October 2000. Two data forms
completed for the wetland delineation are attached.
Proposed collector road R002 will impact 150 linear feet of stream channel
approximately 3 feet in width (466 sq. ft./0.01 ac.), which is also subject to the Neuse
River Basin (NRB) riparian buffer rule. The alignment of R002 will also impact 50
square feet of the upper limit of a linear wetland that is separate from the aforementioned
crossing. Approximately 12,079 square feet of riparian buffer (Zone 1 - 8,902 sq.
ft./Zone 2 - 3,3177 sq. ft.) will be impacted by R002. Proposed collector road R003 will
impact 787 square feet of headwater scrub shrub wetland that has developed within the
discharge bay of a detention pond and 150 linear feet of stream channel approximately 3
feet in width (450 sq. ft./0.01 ac.), which is also subject to the Neuse River Basin (NRB)
riparian buffer rule. Approximately 12,395 square feet of riparian buffer (Zone 1-
10,428 sq. ft./Zone 2 - 1,967 sq. ft.) will be impacted by R003.
The USACE's current policy requires applicants to avoid and minimize wetland and
stream channel impacts to the maximum extent practicable and compensatory mitigation
to offset unavoidable losses of waters of the US when impacts exceed the thresholds for
notification (0.10 acre) or if a discharge to a special aquatic site such as wetlands is
proposed. It is important to note that portions of the alignment and the connection points
of these roads to US 70, Ebenezer Church Road, and each other are generally fixed based
on their presence on the City of Raleigh's thoroughfare plan and conditions contained in
zoning cases (See Withers & Ravenel letter attached). Proposed collector road R002 has
been designed to cross the stream channel at a perpendicular angle to minimize stream
channel impacts. R003 has been designed to cross the stream channel as close to a
perpendicular angle as possible given that the connection points of the collector roads
have been predetermined as mentioned above. Both roads were designed using head and
wing walls to reduced the right-of-way widths as much as possible to minimize impacts
to the channel. Because the total impacts to waters of US (0.04 acre) resulting from the
project are below the notification threshold mentioned above and vegetative buffers will
be maintained as required by the Neuse River Riparian Buffer rule, S&EC does not
believe compensatory mitigation should be required by the USACE for this project.
NC-DWQ's current policy does not require mitigation for wetland impacts below 1 acre
and stream channel impacts below 150 linear feet per tributary. Because the cumulative
impacts to wetlands, excluding stream channel impacts, (0.02 acre) are below the
aforementioned threshold and neither of the proposed road crossings exceeds 150 linear
feet of stream channel impact, S&EC believes that wetland and stream channel mitigation
should not be required by NC-DWQ.
October 31, 2000
S&EC Project #: 00-5268
Page 3 of 3
As noted above, the two unnamed tributaries to Turkey Creek that will be crossed by the
proposed collector roads are subject to the Neuse River Basin riparian buffer rules. As
noted above, proposed collector road R002 has been designed to cross the stream channel
at a perpendicular angle to minimize stream channel impacts. R003 has been designed to
cross the stream channel as close to a perpendicular angle as possible given that the
connection points of the collector roads were predetermined. Additionally, each road
crossing does not exceed 150 linear feet of stream channel impact or 1/3 acre of riparian
buffer. Please refer to the "no practical alternative" letter prepared by Mr. Jerry Jenson
of Withers & Ravenel and attached to the PCN, which explain the constraints of each
road crossing. Current NC-DWQ policy allows road crossings without mitigation if the
impacts are less than or equal to 150 linear feet of stream channel or 1/3 of an acre of
riparian buffer. Because project impacts to the riparian buffers (R002 and R003 each
impact 0.28 acre) are within these thresholds, S&EC believes that riparian buffer
mitigation should not be required.
Sincerely,
Jennifer A. Burdette
Environmental Scientist
Kevin C. Martin
President
Attachments:
Pre-construction (PCN) notification form
Site Location Map (Figure 1)
Wetland Impact Maps (3 Sheets)
Two Data Forms (USACE copy only)
Agent Authorization Form
Withers & Ravenel "No Practical Alternative" letter (10/19/00)
NC-DWQ $475 Check (NC-DWQ copy only)
c: Danny Colton, Highway 70 LLC
Jerry Jenson, Withers & Ravenel

DWQ ID:
.ooA390.
Corps Action ID:
Nationwide Permit Requested (Provide Nationwide Permit #):
14
Pre-Construction Notification Application
For Nationwide Permits that Require:
1) Notification to the Corps of Engineers
2) Application for Section 401 Certification
3) Coordination with the NC Division of Coastal Management
Send the original and (1) copy of this completed form to the appropriate field office of
the Corps of Engineers (see agency addresses sheet). Seven (7) copies should be sent to
the NC Division of Environmental Management (see agency addresses sheet). PLEASE
PRINT.
1. Owner's Name: Highway 70 LLC
2. Mailing Address: _
Subdivision Name:
City: Wake Forest
State: NC
Zip Code: 27587
Project location address, including subdivision name (if different from mailing address
above): The proposed protect will be constructed on currently undeveloped
property that does not have a specific address.
3) Telephone Number (Home): NA (Work): 919/556-4310
4) If applicable, agent's name or responsible corporate official, address, phone
number:
Soil & Environmental Consultants, Inc Phone: [phone]
11010 Raven Ridge Road Fax: [phone]
Raleigh, NC 27614
5. Location of work (provide a map, preferable a copy of USGS topographic map or
aerial photograph with scale):
12429 Falls of the Neuse Road
County: Wake Nearest town or city: Raleigh
Specific Location (include road numbers, landmarks, etc.):
The proposed project consists of two collector roads (R002 & R003). R002 begins at
Ebenezer Church Rd. approximately 1000 feet north of its intersection with US 70,
runs generally east for approximately 1800 feet, and connects to R003. R003
begins at US 70 approximately 800 feet southeast of its intersection with Ebenezer
Church Rd., runs generally northeast for approximately 1400 feet, and connects to
R002.
6.
Impacted or nearest stream/river:
Unnamed tributary of Turka Creek
River Basin: Neuse
7a.
Is project located near water classified as trout, tidal saltwater (SA), high quality
waters (HQW), outstanding resource waters (ORW), water supply (WS-I or WS-
II)? YES ? NO ? If yes, explain:
7b. Is the project is located within a North Carolina division of coastal management
area of environmental concern (AEC)? YES ? NO ?
7c.
If the project is located within a coastal county (see page 7 for list of coastal
counties), what is the land use plan (LUP) designation?
8a. Have any Section 404 permits been previously requested for use on this property?
YES ? NO ?x If yes, provide Action ID number of pervious permit and any
additional information (including photocopy of 401 certification). The
proposed collector roads (R002/ R003) connect two existing state roads. Therefore,
their construction is a single and complete project distinct from the properties that
are crossed.
8b. Are additional permit requests expected for this property in the future?
YES ? NO ?x If yes, describe anticipated work:
9a. Estimated total number of acres in tract of land: The two collector road corridors
contain approximately 9 acres.
9b. Estimated total number or acres of wetlands located on project site: 0.05
10a. Number of acres of wetlands* impacted by the proposed project by:
Filling: 0.04
Flooding:
Excavation:
Other:
Drainage: Total acres to be impacted:
* The acreages reported above also include stream channel impacts.
10b. (1) Stream channel to be impacted by the proposed project (if relocated,
provide distance both before and after relocation):
Length before: 150' & 150'
After:
Width Before (based on normal high water contours)
Width After:
Average depth before:
3'
After:
(2) Stream channel impacts will result from: (check all that apply)
Open channel relocation: ? Placement of pipe in channel: ?
Channel Excavation: ? Construction of a Dam/ Flooding: ?
Other:
n nd
11. If construction of a pond is proposed, what is the size of the watershed draining to
the pond? NA
What is the expected pond surface area? NA
12. Description of proposed work including discussion of type of mechanical
equipment to be used (attach plans 81/2" x 11" drawings only):
Two proposed collector roads (R002/ R003) will be constructed using conventional
heavy equipment.
13. Purpose of proposed work: Please refer to the 10/19/00 letter prepared by
Jerry Jenson of Withers & Ravenel for the purpose of the collector roads.
14. State reasons why it is believed that this activity must be carried out in wetlands
(include any measures taken to minimize wetland impacts): The collector roads
each cross separate unnamed tributaries of Turkey Creek. One wetland at the
stream crossing will be impacted by collector road R003. This headwater scrub-
shrub wetland is within the discharge bay of a sediment pond located on the
adjacent property. The joint development of the road requires the road to be
located on the property line to serve both property owners, which necessitates
impacting this man-made wetland. The proposed R002 will impact 50 square feet
of the upper limit of a linear wetland that is not associated with the stream
crossing. Please also refer to the aforementioned letter for an explanation of
alignment constraints, which necessitate impacting wetlands
15. You are required to contact the U.S. Fish and Wildlife Service (USFWS) and/or
National Marine Fisheries Service (NMFS) (see agency addresses sheet) regarding
the presence of any federally listed or proposed for listing endangered or
threatened species or critical habitat in the permit area that may be affected by the
proposed project. Date contacted: (attach responses from these agencies).
Performed by USACE
16. You are required to contact the state historic preservation officer (SHPO) (see
agency address sheet) regarding the presence of historic properties in the permit
area which may be affected by the proposed project. Date contacted:
Performed by USACE
17. Does the project involve an expenditure of public funds or the use of public (state)
land?
YES ® NO ? If no, go to 18. See the aforementioned Withers &
Ravenel letter.
a. If yes, does the project require preparation of an environmental document
pursuant to the requirements of the North Carolina Environmental Policy
Act?
YES ? NO Ox
b. If yes, has the document been reviewed through the North Carolina
Department of Administration State Clearinghouse?
YES ? NO ?
If answer to 17b is YES, then submit appropriate documentation from the state
clearinghouse to division of environmental management regarding compliance
with the North Carolina Environmental Policy Act.
Questions regarding the State Clearinghouse review process should be directed to
Ms. Chrys Baggett, Director State Clearinghouse, North Carolina Department of
Administration, 116 West Jones Street, Raleigh, North Carolina 27603-8003,
telephone [phone].
18. The following items should be included with this application if proposed activity
involves the discharge of excavated or fill material into wetlands:
a. Wetland delineation map showing all wetlands, streams, lakes and ponds on
the property (for Nationwide Permit numbers 14, 18, 21, 26, 29 and 38). All
streams (intermittent and permanent) on the property must be shown on the
map. Map scales should be 1 inch equals 50 feet or 1 inch equals 100 feet or
their equivalent.
b. If available, representative photograph of wetlands to be impacted by project.
C. If delineation was performed by a consultant, include all data sheets relevant
to the placement of the delineation line.
d. Attach a copy of the stormwater management plan, if required.
e. What is land used of surrounding property? Commercial/ Residential
f. If applicable, what is proposed method of sewage disposal?
City of Raleigh sanitary sewer system
g. Signed and dated agent authorization letter, if applicable.
NOTE: Wetlands or Waters of the U.S. may not be impacted prior to:
1. Issuance of a Section 404 Corps of Engineers Permit,
2. Either the issuance or waiver of a 401 Division of Environmental
Management (Water Quality) certification, and
3. (in the twenty coastal counties only) A letter from the North Carolina
Division of Coastal Management stating the proposed activity is consistent
with the North Carolina Coastal Management program.
. GZ -.8 g/g 1 00
ner ent's ignature D to
[Agent's signature valid only if Agent Authorization Letter from the owner is provided
(18 g.0)]
Project Scale:
00-5268 1" = 2000'
Mgr.: JAB 10127100
Figure 1- Location Map
US70/Ebenezer Church Rd
Collector Roads
Highway 70 LLC
Raleigh, Wake Co., NC
Soil & Environmental Consultants, Inc
11010 Raven Ridge Rd. - Raleigh, NC 27614
[phone] • [phone]
Web Page: www.SandEC.com
-N
t
MPACT SUMMARY
ZONE 1
ZONE 2
,TOTAL
-, HANNEL
%HANNEL
8,902 SF
3,177 SF
12,079 SF
150 LF
466 SF
25 50 100
a
h = 50 ft.
wwe?erww
CAD File
=50' SHT-NRB-2
Sheet No.
147 ) ^'
IMPACT SUMMARY
NRB ZONE 1 8,902 SF
NRB ZONE 2 3,177 SF
TOTAL 12,079 SF
CHANNEL 150 LF
CHANNEL 466 SF
50 0 25 50 100
Ali EAM
1 inch = 50 ft.ENGINEERING & SURVEYING SHEET
fes+ iri�i�aurria��lrMrirrwr�r�
WITHERS & RA VENEL STREET
( (�2 Designer Scale CAD Fide
Engineering & Surveying, Inc. 0 0 W&R 1"=50' SHT—NRB-2
t 1 J MacKenan lirive Drawn By Date Sheet No.
Cary, N.C. 27511 JAC 10/30 00
PHONE : [phone] Checked By Jab No. 2
FAX : $19-467-6008 JJJ 200147

Soil & Environmental Consultants, Inc.
11010 Raven Ridge Road • Raleigh, North Carolina 27614 • Phone: [phone] • Fax: [phone]
Web Page: www.SandEC.com
AGENT AUTHORIZATION FORM
All Blanks To Be Filled In By The Current Landowner
Name: H G Awa.\i 10 L L. C
Address: 1'. 4 -9 'V#,u s W AM O 2 -?' W c? 2't`
Phone: ? 19- SS.(b- 'T 31
Project Name/ Description: US70/Ebenezer Church Rd. Collector Roads
Date: l O? ?- &,000
The Department of the Army
U.S. Army Corps of Engineers, Wilmington District
P.O. Box 1890
Wilmington, NC 28402
Attn: Amanda Tones
Field Office: Raleigh
Re: Wetlands Related Consulting and Permitting
To Whom It May Concern:
I, the current ro er owner, hereby designate and authorize Soil & Environmental Consultants, Inc. to
act in my behalf as my agent in the processing of permit applications, to furnish upon re. s
splemental information in support of applications, etc. from this day forward. The'-_ day of
I C. D.ooo
This notification supersedes any previous correspondence concerning the agent for this project.
NOTICE: This authorization, for liability and professional courtesy reasons, is valid only for
government officials to enter the property when accompanied by S&EC staff. You should call S&EC
to arrange a site meeting prior to visiting the site.
.L,C?N1F_L. .L • 0 66_7-aw
Print Property Owner's Name
Pro rty O er's Signature
cc: Mr. John Dorney
NCDENR - DWQ, Water Quality Planning
4401 Reedy Creek Road
Raleigh, NC 27607
cc: Mr. Jennifer A. Burdette
Soil & Environmental Consultants, Inc.
blank agent auth form doc
Wetland Delineation/Permitting/Mitigation Soil/Site Evaluations On-Site Septic Systems Environmental Assessments/Audits
Neuse Basin and Watershed Buffer Evaluations Groundwater Hydrology Endangered Species
Charlotte Office: [phone] • Hickory Office: [phone]
WITHERS & RAVENEL Engineering & Surveying, Inc.
111 MacKenan Drive, Cary N. C. 27511.9191469-3340•FAX.[phone]
WI7RERS 8`RAYENEL
. October 19, 2000
Mr. John Dorney
NCDENR-DWQ
4401 Reedy Creek Road
Raleigh, NC 27607
Mr. Todd Tugwell
USACE
6508 Falls of Neuse Road, Suite 120
Raleigh, NC 27615
Re: US 70/Ebenezer Church Road Collector Roads
Neuse River Riparian Buffer
DWQ Project #00-0072
NBRRO Project #00-155
Dear Mr. Dorney and Mr. Tugwell,
The purpose of this letter is to explain to you the purpose of the proposed
collector streets to be located in the northeast corner of US Highway 70 at Ebenezer
Church Road. As shown on the enclosed project map, the collector streets are planned to
cross two designated Neuse River Riparian Buffers. Summarized in the proceeding
paragraphs are explanations regarding the roadway's purpose and location.
Several years ago the City of Raleigh adopted the US Highway 70 West Corridor
Plan. A copy of the corridor plan's transportation system map is attached. The network
of collector streets specified in the plan are classified as arterial helpers and are intended
to provide circulation and relief of traffic congestion along US Highway 70 and other
congested roads in the region. To assist the development community and property
owners, the Raleigh City Council has also authorized a funding program to facilitate a
public/private venture to construct the collector roadways. The structure of the funding is
based on the City of Raleigh participating 50% in the design and construction cost of the
roadways and developers/property owners responsible for the remaining 50% of the cost.
Some background material regarding the US 70 Collector Street Construction Assistance
Program is enclosed for informational purposes. The two proposed collector roadways
shown on the project map as streets R002 and R003 are designated on the US Highway
70 West Corridor Plan and qualify for joint venture funding with the City of Raleigh.
The alignment of the collector roadway designated as Street R002 is consistent
with the US 70 Highway West Corridor Plan. To facilitate traffic movements and
maintain roadway continuity in the area, it is necessary for Street R002 to connect with
Ebenezer Church Road directly opposite a separate collector street currently being
designed and constructed on the east side of Ebenezer Church Road. Due to zoning
JAADMMERRY\101900.JD & TT.doc
constraints zoning case (Z-44-94), Street R002 must also follow the northern boundary
line of the "Fellows" property as labeled on the project map. Therefore,. due to the
alignment commitments as specified above, it is necessary for Street R002 to cross the
Neuse River Riparian Buffer once, as shown on the project map.
It is necessary for. Street R003 to cross the Neuse River Riparian Buffer in order
to satisfy the city of Raleigh's requirement and objective in completing the collector
street system as illustrated on the US Highway 70 West Corridor Plan. Street R003 will
eventually be extended to Pinecrest Road to the north and the roadway will serve
hundreds of acres of land. There are no other practical alternative alignments available
since the stream buffer runs parallel with US Highway 70 and crossing the buffer is
inevitable in order to access properties to the north.
To conclude, the collector -roadways as shown on the project map, are of
significant importance to the City of Raleigh and adjacent property owners in helping to
reduce traffic congestion on US Highway 70, and area-wide roadways. I hope this letter
provides adequate explanation regarding the purpose and location of these important
collector roadways.
Sincerely,
WITHERS & RAVENEL
ENGINEERING & SURVEYING
Jerry J. Jensen, PE
Project Manager
Enclosures: Project Map
US Highway 70 West Corridor Map
US 70 Collector Street Construction Assistance Program
Cc: Jennifer Burdette - S&EC, Inc.
Kevin Martin - S&EC, Inc.
MADMMERRY\101900M & TT.doc
U.S. HIGHWAY 70 WEST CORRIDOR PLAN
TRANSPORTATION SYSTEM

o.
r ?P., 11 ¦¦ 1C1
Th ??• ?
0

0
i--o
0
- Existing arterial
11111 Proposed arterial
Existing secondary arterial
SUMMON Proposed secondary arterial
t¦Emmma Existing major thoroughfare
NOOSE Proposed major thoroughfare
Existing minor thoroughfare
ammmmm Proposed minor thoroughfare
Existing collector street
Proposed collector street
• Existing interchange
O Proposed interchange
O Proposed grade separation
Possible Lynn Road extension south of U.S. 70
subject to future study
Possible extension of Durham Loop Connector
south of North Wake Expressway subject to
future study
Please note: the North axis of this map does not
correspond to the vertical axis of this page.

RD .
r-1

I?
Cj
o
LII v . ;N?
%
1R?/ G>
I

?I
1 194 Raleigh Comprehensive Plan
Miscellaneous Small Area Plans 5-11.45
CONSTRUCTION ASSISTANCE PROGRAM FOR THE
US 70 COLLECTOR STREET SYSTEM
Whv Is This Program Being Implemented?
The City's development regulations typically require that collectors and local access streets be
built by developers at their expense as deveiopment occurs- This can result in such collectors
being constructed in a piece-meal fashiozt and not being functionally complete for many years.
This program would assist the development community and property owners to accelerate the
construction of certain designated streets whose timely completion would be particularly useful
to the overall US 70 Corridor by providing financial. participation from the City.
hole?
Which Streets are Er
Streets on the adopted US 70 Collector Street System (see attached map and list) that are
classified as arterial helpers and are intended to provide circulation and/or relief of congestion
along the arterial are eligible for this program. All projects must provide a complete productive
and functional traffic link between elements of the ctisting collectodthoroughfare street system.
Elements of the US 70 Collector Street System approved to be constructed under already
approved subdivisions and site plans, other existing developmenr approvals, and alternative
public/private agreements will not be eligible for finding under this program.
Who Initiates a Proiest?
The private sector is responsible for initiating eligible projects through an agreement for a
publiclprivate joint venture. Paddpation its this program is strictly voluntary.
What Approvals are Necesaarv?
Each project must be approved by City Council. Public meetings and/or hearings will be
necessary to meet policies for public Raiding. All projects must be built to City of Raleigh street
standards and are subject to contract security requirements of the City.
Hoer Mucci Participation by the City?
Approved projects will receive a 50% City funding contribution for design and construction
costs according to the City's adopted reimbursement rates in the City Code. In certain
circumstances, the City may fiord all eligible project costs and allow the developer's share to be
paid back over five (5) years at an annualized interest rate of 6%. All payments received will be
returned to the program for additional fiture projects. As with current policy, the property
owners will be responsible for dedicating the necessary right-of-way at no cost to the City.
What Other Aspects of the Prou m Should Prooerty Owners be Aware OV
Water and sewer construction will be considered on a case by case basis; however, normal
assessments and public project policies will apply. In the case of a missing link adjacent to an
approved public/private project, a companion City project to complete the functional traffic link
may be considered if the public/private project under this program makes up approximately two-
thirds (213) or more of the total functional length. In the case of a companion public project, the
City funding contnbution shall be 100%; however, all normal assessment and public project
policies shall apply. The duration of this program is five years.
U.S. 70 Collector Street Construction Assistance Pro ram
Candidate High Prio ' Street Seg ments i
I
I First Prio ' I `
SECTION I DESCRIPTION I FROM: TO: ' LENGTH ft
t
1
A-1 € Ei?enezer Chump Connector- NW € BM!nJM Or. -US 70 1350
.
A-1
3 I Triangle Drive Extension IT ' e Or. I Barefoot Ind 650
.
A-2 I Ebenezer / US 70 - NE Quadrant ` Ebenezer Ch. i US 70 38
A?-l1 ; Ebenezer / US 70 - SE Quadrant US 70 I A-32 690
A-32 I Ebenezer / US 70 - SE Quadrant A-3.1 I Ebenezer Ch. 1650
1
A-4 I Ebenezer Chum Connector - SW I US 70 I Ebenezer Ch. 950
.
1
B-1 I Pinecrest-US 70 Connector I US 70 t Pinecrest Rd. 1200
.
B-12 1 L nn-Pinecrest Connector 1 Lynn Rd. i Pinecrest Rd. 3600
1
B-4 I Winchester Or. Extension i Westborou WS 70 2000
.
1
C-1 I Northside Parallel Access Collector `Trion a Dr. I US 70 Stub 1300
.
C-12 1 Northside Parallel Access Collector I US 70 Stub t A us Drive 1000
C-1
3 INorthside Parallel Access Collector Jens Ci. TWiiji a Rd' ' 1600
.
C-1
4 I Northside Collector/ US 70 Stub 1 Ncrthside Col. I US 70
.
C-3 i Scutthside Parallel Access Collector !US 70 ::Raleigh T ota: 1300
C-4 I Southside Collector / US 70 Stub I US 70 1 Southside Col. 1000
I I
I SubTotal' I 2=90
I
Second Priority
i DESCRIPTION
I FROM:
T0: t.ENGTH ft

A-1
5 Barefoot Industrial Drive Extension
! i Barefoot Ind. 1 Ebenezer Ccrt. 1460
.
B-21 -
-
Grove Barton Drive 1 L nn Rd : HHbum Rd. 1600
B-4.2 I Winchester Drive Extension 1 A-3.1 / A-3.2 B-4.1 2400
i
I
! SubTotal: 1 5460
t
GRAND TOTAL: 1 278W

I ?
I I

3288
vvmm r
DATE w wkv Qa vrInQn I v
INVOICE NO. v., ?rw
COMMENT
AMOUNT
DISCOUNT
NET AMOUNT
10/31/00 OOCHKREQ3 NC Dept of Water Quali 475.0 .0 475.00
(P
? .? c

7hL'.a CillgiJ,
M n

r-u?ru #nn?OQQ in iii inn rvr, n,=r,t of Water Oualitv TOTAL 475.00