20230460 Ver 1_Impact Map Storm Calcs_20230328

T) T Tl Piedmont Land Design, LLP
f LIJ 85 M04 Six Forks Road * Raleigh, NC N615 * [phone] * Fax- [phone]
Low Density Stormwater Calculations
For
Mill Stone Creek Subdivision
Wilson, North Carolina
L. SC''
RPSIVI'N
Issued:
March 23, 2023
Civil Engineers * Landscape Architects * Land Planners

Page 1
Table of Contents
Section Page
Narrative
Appendix A — Overall Drainage Plan and Drainage Area Map
Appendix B — Grass Swale Calculations
Appendix C — Energy Dissipater Calculations
PLD

Page 2
Narrative
The proposed residential site is located on a 121.0 acre tract of land. The proposed development
includes construction of 302 single family lots and associated infrastructure. The site is located in
the Neuse river basin.
Stormwater Runoff Analysis
The site proposes to utilize the low density option. The subdivision streets are required to be
constructed to City of Wilson standards, so therefore are required to be curb & gutter streets ,and
will follows the Curb Outlet Systems requirements of 15A NCAC 02H .1003. The stormwater
requirements are as follows:
• Provide a swale or vegetated area that can carry the peak flow from the 10-year storm at
a non -erosive velocity
The vegetated swale must meet the following conditions:
1. The longitudinal slope of the swale or vegetated area shall not exceed five percent, except
where not practical due to physical constraints
2. The swale's cross-section shall be trapezoidal with a minimum bottom width of two feet;
3. The side slopes of the swale or vegetated area shall be no steeper than 3:1 (horizontal to
vertical)
4. The minimum length of the swale or vegetated area shall be 100 feet;
Calculations are provided for the energy dissipaters and for the grass swales at each pipe discharge
location.
PLD

Page 3
Appendix A
Overall Drainage Plan and Drainage Area Map
PLD

/
/
/
/
/
/�
/
05
��
.
.
.1
,
�.
,�� _ -
EES-17 ,-
/ / _­` -
, I ----- 1_. ",� ---
- ""'
I 11
I -
/ ,,-,, DA= 1 1. 5 AC 1,
�II III , J.//- / . / I'",""',;�1I'��/
; 'r�,, "I ,I", I,"���'",/,I;�-';"/ ",XI �"i�
"I I I / "�'/'. /�,,",,,� ,,,,,`", ",. ,"I " I ""/""",,I,,"I
RED OAK FARMS ,,,I, ,,/,, , , _ ,,
, ,,,,?,,,":, "',II,,
","
, ,, ,v, 4I,
�" 4,,',I,,1�,fI,"�,,,, ,"',I "," ,0�";I""
,I/,/,',/-I',­,/',",,,/-,I,' "z,,, ,'""" _,,I-,;
",,,",",_-"/, , 4,I,*,"-", ' ,,III,"- i , ,,,
', ,-%,""-- ,
, ,.�,/,",,",/," ,,,
DEVELOPMENT LLC''
/II I1/;1/"I/" ,,
/ -J
1 PIN: 2783-75-5692 %
i ; I/" `/ J!//
, I
,I Z// -
ZONE. AR� -"I-t """
1
/ ",Li " "_____"__(�II /
_111,
(-0)
-.11_
1
�% /%/% //�-�(/ , ,;-jrI
(I
,I
i i / / !,, , % / I/ / -
/ r`=
Ix I.
1. / /
/ /
o i
w
\ I' /% / i/, ' %
// _
;,
/ / �/ ,' %'if' , i_>
N/F I / , , /'-
HAROLD PAGE /;%'r' %/,:;;' ,o /';
' :-:' r
I / / ; / , `G
/ / , �:: / ,
PEARSON PAGE / f // /; �j':' 1
, kj V I ;'J
I
2011 PG 0 :',�;; ,
?783-76-0538 / ;' /' ' ;' / , ,
ZONE, AR I /
'/ /
/
1
rf �/ , Jf/ /
i.
,
,%
/. r
1 /, /
i ,/ /
/ 1 'X
l
IIIr
.1
/
0 v - ,�
',,
1 - �/ N
F� - /// ,1�"""",""/","",�`,�,-/,,`I
/ ' i' \
/
/ f
1 i _ , J/_,),_1�
�/ _ _ %,' ,
/
//
'r I \ ,. ''�`' ;
�I 1 �%
/ /
'r
1 "/ h
i
\.,
1
f /,
' 1
I/ i
/ r --_
-
/ ; ;' -
1 h \
i" ES
/
/; '
DA _ _
r/
/ -1
/ \
IAROLD PAGE / , , _ -- ---1-',
-,,I -
-ARSON PAGE ,/, :� _,�' ,�: -�,. _:\\
/ - - --
/ __ -�I-�
_
,
,, -
„
r s
l' �l
1 1 PG 22 , ' ' ' -' ' . - '
/, __
;p
?� -- r - _
�= r
33 67 1052 :-�
'/ Y -
/ ,
;'r /; // -
/. r
- _
;- -
--
-,�_
NE: AR / / / / / .111// /*, 11/`//- ,,\I1.1. ,,,,:",",\,,/,,,,,, �,/ 1/1I/1- 11I
/ % ---
„ „
, ,
.
1
j _ - 1
,
ff /
/:
/, 5.
r NE U-SE
/ 4 ; ; ;' ;';' //,/ ;'� ;: ' ;' 8; ; ; ; / ----------------- " ----- R1-V ER ; \ B U,F F E &-- -----
/ r ' / ,- ; , ; I / :-------------------- . -----,-\1,
; . t:. f \ 4\ I
-1 / /-/ /-/ --..// // // ",*/ , ,I///:"//I""
I -I
II
�\I_-,," �,_X-- ,- _\ ,_\_-_ 77�\�- \_,-\ I,-�,-
-- "-- "-\'I _1),�,1-\_, �,,_-L- I".\ ,,
/
I
1
;,; ;'
/ i;' -
-
i
/
/
/ ii, ,'/, // ,//I" , it 1 J'A
'i/; // /' / i'�
♦ 1 ,
%/;
�,ii;'
// /
/ i t
r' ' r
- __
/ / -
;/"-
(
i'
1 II
\; \
„r,
,''i% %='ice%%;;;', r�\,'1 / v i
` __ ��
;`�=
j ,� _J;
,
,
,
,
, J;%
/ 1
/ ,
\ %'' - \
i' l -
\ - q
♦ \`
\`= �C
- o , ,
,' I
lIl \ r 1
1''
r
J
\ ' - ,1
I
x
+h'
\
,I. a
/ 1
iJ \' -
R
, 1'
'I I,
I, 1' \
\
I%
.,�G
\.
I -
\\
I
\` \
A
/% 1
I
I \`�, ` 1
1 ....
\ I I
-1k it FUTURE
\,
\ -
1' 1
FA
/ y l i 1 u
/ I
/
(11, "__ ____ -
w ,\
/';; ;''/
:)
i'\ -
/ -,-
11 ,,:
�/' �;,
,,5 , �/ - --I _
j1
k
/ ' -__
j" _ `D
/ '1
II
I c-
' I'
I, 1 I
1
1
/ -,- /
L�
/ r
--�
\,
1
.
\ ;: :::
f
/ %1
_ C, i
\` ::. ;
``'
I ♦
/
F
yl
\`
l /
1 I
/ 1
\
I
_
M0N AND
!/
1
I ` \-'- ,, I
'.ER EAT MON
�
PG 237
lipI
%;'
l=1
I ; m
a , \ 1
I ' ' i%
\v ,
1
J
II
/
-57-/
31 12
1
\-
Il
{ I I
/
\
,Ill
/
/
1„
S
_
,d
8
\\
/
/
,I1,
i 1 '
/
\
,\ \, ---- -
'' '\ -`
/
/
\
- _ - \
\ ; \ I
'\
--------------
`\'
\
I \
---- ,
\
N/F
I
DAVID
KERMIT GLOVER
SUE
JOYNER GLOVER
`
EF 2007
I
PB 20-208
1
/ PIN:
2783-46-2159
ZONE: AR
%%
\
111�1'1_`_
,
\ .\
\
\.
\
\,
`
\`
`
t
\ \
\%
\
\ , % ``\ -
- _-___________% �'� ? HATCH LEGEND
_--, _ _-- \� S?, �
- " '' --- YpE C, OpTION gyp,\ ? VV
:-', --- - R (T ; '
PROX. LOCATION /'", =;"/� 30' B FFE 0�i/c\. \
-P&L EASEMENT !, �,�\ ` PROPOSED OPEN SPACE
'�''° `j� � ,1
CH SIDE OF /%';; rx"� \
OH POWERLINE) _I-.; ,p ` `
%\\
' f.
r"
:1 K a%;,, - "- 50' NEUSE , A
/\% = //' f"' RIVER BUFFER O�y \ \% EXISTING WETLANDS AREA
,<\�, ----- ` \
1 a
`v`. . �% \
�.. - `_
��_;_____ ---- MCCONNELL JOHN P \%
1�
/ \
\ `\.
y/ - &�`�' \ % 1 MCDONALD IRVIN JR `1
\_ \, - '
�• `` BROGDEN TED MCCONNELL JOHN P \
-- {- 30.67 AC MCDONALD IRVIN JR `
j , •% PB 42 PG 294 BROGDEN TED >\1�
11\\11�1 /, _,,�,,,,,--III \�/ -_�I-"\'-_ --;N \-, -1;--\,,-I�--9;/;-�,-L--�_.,,,�-Z0/;j-01,
,
, "'i'.�� _�_ ,�- I I -,/ 11�I I/I /� -/
� � /_�/I /�I11 \1,,1/
/II,-, — -,.-/) II I/,;-'-­I-II/-1 1-�-, )"//-L-///--�--,/ - I - `-\,/ -,-�\-_,;/1-�-�--7�_.,,/ ,_ / �",\ _" -�),',/, -.I/ / _1'�z / \,/` �/ -_ I_, I 1"1 ; //11/ -ii-/� /x_-"1I __/�I ;_,�I,,\," �i,,'�% �%) �1- ��\1z 1_� _ \/_,I" I_\,, I , �\/ r\," .il",1rl. \j14,\h1- "1i;,� I�i
II I i -";.-.- I
II\_", _11 ��;II1,'", ,�"1
,/ 1, ,,,.1i1II),1 11'� ,,,"
\\ ',, rI 4","-',,", -,'--,,,II� 1-'_.
," -_, -,;-­ " - -,I", 'I1_1 -N� ,_-, ,­ "_1,-_I�I1/-­� ,1I ,1-'\--\% i-"\j'- f, %i/, I1 ." �:"
:-1:I%:---":"---S,:-,ti _-_%-:_-, .1:1 ; 7,( I-/ 1_'-�-"_�,-.i.,'I -/_", _ li( % " I
-_-I 1"L1I"o\ ""itI1I1 I'1 _, "f_,, I "_," :,I
,, ,
- \ ,/\"e,, , ,111I ',"',,:,1 \, ' "'I,, -",_,;,
_ ,\I .," )� 11 ; , ') , --ki\I-I\ .., -; 1\-,\,,I , , "_W-�,I _­., I1l- ,, I _ �," I I, �(I /IIff ".\. - ,-"i,t-,, 'I,�,",,,r,',",_,'/\I\ "-,:�",:\\-­\, . ,\
-',,-, I---1-_-I--,-D-_-----_ i1 - I \ ,.1 /
\-A1I,,,, ,,/ ,�_I",1", i, -,,,-�- ",; ), .,-�/,`_,\ -',,
i ,�,1''�1�,�
I , "'� ," .. ', "2�,""
�,-
"'!1�\,, -,,
,,�,-, -\,-1,,6-
,\--�,,_,N: \ ,\- -,
--
:-,.-.--,1-',
-- --\ :5�� :,
- 7- --:-7 _-_-:------: -----7----­-_--_I ----",-A--:-------_-,-,--C ,-_-'-:-,----_----_--"_ -_ ---
--�---_--::-_
7--
--_-_1N " -- �_-:_
---
--�_)-,�,
,,"I, _,-
� -
,--I--/\\�-1 I
i1_,-.,_
\-1,­ \
-<I-\ \-
----_\%, , - \- -I --\\-%---------,-,_- 11I, < 1--11--�--_------
----1--1-" -------- ---._---:--1_--1 - -I" -_-/--1,­'�I I
I I- _ _,-_" ,-/ -- -I -)'__1-,_ _,,- "­__­-:­_-i --_­-:- 11, '2-/---I:� -/r_-,---)-
_',---
-_--__--_ _-__ ,- ' - -, -1,1 I\'- ---\ 1\-_- --; -�--
­_--�--_- %--_:--, \I"
,- , --�,;,; --�_-_- \_
-_
--%_----- -"- "1I_I
I .i1
, �`` \\ PIN: 2783-73-0557 2.14 AC \-'�`�
\
\:% I �\_-\ \_
\-sL
i----I-
-I --_1��
I;/X '\ ZONED: B2 PB 39 PG 1 13 A
"II --VEIL \% PIN: 2783-62-8755 � 1 \_ "�'-I _ I
SITS #4 '\\ `
\;i�'
�--
. i\ / (\\ ,
j� O asv -- ; -`" _`yA ) / �/ \
- ,,\ _ I ,,�
' \ /' /% ) \'`\ W�IIIf+1ice1`_\\\•• �\, / -- .- 'i`
�- I l i \ Ir \ \ _I
�> � � -__, ^�I ;� _ MCCONNELL JOHN P ' \%,\k�
\ -, \
,,�-,I'_\ ,-,,'-,
'S IT ;1�3I ,, - MCDONALD IRVIN JR ­�� \% \
-- _
I ``,; 1;/;� BROGDEN TED ��\°\. \%,\\
\ :—-N,
' 1; ,' 'I,' � I 2.14 AC �� \\ \\
"I-,
,\
/ - - ;,
�-
,\I,V'�, l"\li" 1
I1 -
,,-
iI
,\,I`i,!,­ ,`''1"V,,
I1"N
%"'''
\"1,
" I
, t---!- lr I , ` E
/ ;; ;�, _f_,� EXISTING WETLANDS \ - 3 :{� --- \\ \_ \%`
\
P�B a G 1 3
n_s . - - / I .--- PT(�: -2783' 62_,B755
', „
\
- - - -- - 1
s -
'\
,
6
, \ - ---- ----_� Y
_
1
+a -
\ 1
1 \ I \
\ / _ r _ ,,"
d
I"",-
1
1 I
\ 1 l
' ! \ Ir
,
o
\ /
-
\ \
y --�� _ - -
-�- _ _ o
.
"
,
1
HW-2- _ ;\,' __ _ : 0 0 _ _ _ _ __ 1
;, '
`J
/ 4�
_
, „
_
/ 1 / YI
,
- = -- ,v -
-\ \
,
,
,
.
,
I \ I
/, \ k
1 , I
,, - ----" I "' '
_ ,tea- -
I I -
\ I
11
/ ,' N
\ I - / \ I''
- - �lli � 7 - � ,,I _3g;_,
,
-- \1I'-I i-
';ll) .k1.-
,-
: � � iI ""I-.-u,I,
1
N, fj. y'\
",�N�
\,,
n
I - r -
/ 1
-'''',
r \' - I",\\
I
'i
IlN"
s
/ J 1 "
1
1
1
__ I
I':
1.: •-
a o' - t 11
11\
1,
`�% ,
% \
- 1, I \ / r 9 l - - I``
f�%\
erI�/))))"­,,__,",,I�)
� � NI/ �� II /iI",-1I -/, I 11 ,\-�, \it/ Ii""I1I1 ,/ii ). 'I,I , ". I // I 11,I k�, -,,,- , ,, ,�111,( / ",,i1I1 " 1_� -�_./1_/\ -11/ 1,I ,." _\ II,I1­\1\, 1,, I\—�1�\-1-11N1 I_\_'__�1 i �I�\r " ,�I�__,1.N��,� , I\
­_-_-,_-
-_- ­_1
,,,,_
1
I \
l 1
\ \ 1 ti
a I' - -
1
/ ,n �,,
-- ,I - __ sit; \
r
/
t 'Ih /
`.
o 1
// / / % /
i 1 / /
I
�/ 1
�. \
i' \ 1 1
�---� �_--z--r-vI__'�',;1 (1; ,,, _("/ N.1-,111,,, "I f "II-"�-,-"-' --,- --_ �- --�--­-�-,-� -77-7�.-1-__----/_'�___-­, ���U11i
i � - ,• I 1
/ _ ,
\ \
1 _
I
-� ,
\ -
♦ / / J - \
\ \'
'I
i
.
J l
s
I
,
,
,
\ - _.--------- _ - _ : - - i
/ \ /
flL / _ - \ /
\ _ �k
/' \ ; _ s\ _ 1
I /
���,
"I \
,I <'\I- 'I __-1 ". ,,�, \ ,,'­
, 1, ,'\ "'�it, ""tN\� ', ,," \,­_1 " /I I/� I I , 1.-\ 1, ,\, 1�__1N-N_A__1, L��\ 1\?" ,I\�\-,-'.- . ----�-----------
ss
r_ , --- -- - -- -
p�.
. ;;; ,-j�,-,-,\ "I
\ I
,
/, ,
1,
I'
.
/ /
%
i
i
, , _
l
- - I -,
_=_ - ---I--------I---I---N-.-----� %.\%._ \
-'---_--"-_. -.---'."--
i._.
\ \.
1
r 1
- l'
\\\
.
11 - I \ .
f-`'
I
./.
\
l
-__�_
„
\ .
---------- -- \11 1
NG WET LANDS
`y 1
- 1�.
t -
\.
/
l
1
itea_ \':'T
♦ ,
-_ ___ _\ -
t
11 - , ' _
==_ _=
--
I NL�T
__
_ ♦;
:\,-
,�.
I l`YP.
- \
---- \ \\
\
i
a � '
,
/
\J, \ ,
- ,, \, `
(J �,
\
I
1
,,,
\.`
`\\` '
I
-
1
V\` �, \,,
., \\',
/
ill'\
\
\
M NT
/ I \`.
L7 ,'
/ `
J ,
__ \ "
I
\ -
1 \ `
:\ a \'`
„
- ,
, ,
I
/ \
_-_
\`
\' - \
- -
- '
- - - -
- `\
I /
z \ , , ,- EXI T
p , _
�\ �_ __
8 is - _ �` -
-- _ ' ---- - - - �� WET
_ - -: _ _ _ I�AN C
/ �\ \
s `
--
\ - ----- - ----
_
",- ' ,
__ = �', _ - - -V - - - - - __ --
'� _ ___
i _�^�� -
\r /
/r
r = b
4 � -
J _ ` / 1 Via-;' - __ - ----- `\ i i p _.
- -
11 -
` %��
\ r' __
\ = - '
,
,
.
- _ _--
55 %'
,
,
_ _ _ C - -
.
,
b\ - -
NV _
"
i
,
a - fi S Ci
- i -2 5 " _ - -
/ /" li - - -- - - -
i}
I11 __
m` / -
\ L - __
�T - l� I - Z _= - -
ss\ __r_ - , „
%
,
i : k N, I" \� I /-�\ --------- �--- , N,
_
,
_
,
k 'k, I'll 11, 1". "'. ,� , I
\ _
X
_____ N O _ l _ -
y_ _ I _ _ j
- N
a�
-- I
, i'
ss\
- /zz \\ I-
\ -
%\ I
_ - II'
;'
-- \
11 \ ; \
1< \ -�
,
v. - - -
- _ I <,
- o000
" may_ _ ..
11 - ----' - - - ,
\ i -�
a -
t'
it
!I u i
%
i
t.
- - - - _ \
ill=' - - \ - c, _ I
I
-,
r
a t I _`, 1
,,.\
\/
' ,
= -
_i
'.,__
r,' / 1
EY. I
'ry
<�1:y 1 \
.� r' i -1
) I \ -+,� t zw , " -
y 'll
_ // 11� E I ''�
S,__ \1 I
3 '„ 8 I 'i I - 1� 1 I _
1
,: _DA=9.3`_
--- - ' - !�_ ,�� , \\\,, / ,_" ��_
, , ''
__ 4�: - ------------ : ----- - I""
_ , A C "
- "'
% // /,
-_
,
,
,
,
��
1 .
--- _ - --
'' 11 I ----- \ --;�-__::_­ ----- 3)� \ / _
\`
Ii"
J It
\ ' i
„�', \` /
,
,
,
1
__ \
-_-_ _yam_ - / ________________c_r===== _ ___ \ G� 1
\ -• _
- -
T
f _- I
-S I
, 1
I �\
"I "f, l/ /II I'll,
I/ I I . I Ii \FES-58
�•\`
- �', ,"\,01�
1'
, \ \ �,
", "",
"\� \ \
; i
\1'
\ �_
/ ,, I I \, __
\ , \, "\":1___1'\1\,11__, ---",I 1, v\
\\ \ \
"I 1,
, ,
" \1 I- ------
" \ "
, �
I ♦` \
I'/ 1) " I \\
- ; )\ \ `, ``
----------------------- 11 '\
) �\11 i 'I" "
_ ---------------
, -,-,_--,-----, ---:- 1,
A 1 2- __
, ,.1
AC
„
�_ -
-- \, ,\ \j) ,\
-- - ,
-,_--_ - _r__'­­--\
- __ \
\ .
� 11 " " , 4
F
, _ \ = -`
- -- - -
= '
.' ;.
e •,
\ = -
- \\,'
S -
R = '- `\
I
, .
[`
N., F
C&A/GF SP JOINT /
FES-92
VENTURE
C/0 LINDA CHRISTENSON DA= 7.5 AC
DB 2824 PG 340
PIN: 2783-44-6508
ZONE: AR
. _ _____ __ s�_____- -
T.�// \\_11 _
\ _
r =_=
_ - 1
\`
/ \
Ji ,I � 1' yy - "
O
r� t I ` I _-
\ ;a I
`% ` FAD ' I "'LET
____1! "
1 d
- '_�,1 i q
\ 1
11 I
I 111� "I
____ . ,
1" -
'�
J
I �_," -1 ' 1,
_
,
-7-
I`-',I� -
,; 11
,' \ \
------ -/",-" I i
, / I I
r I i I �'
I 1 "" Iii /� ;I
/ "I
N 11
� 'j "
II__1 _____ -_
"I ''i ii - I
I : ( � � 1""� __ _ IN li
I , � %, %
I N. � t, 1-11
i N I
; - � � , 1, I "'
I
I I
I
1, 1 It 11 I _j� t , , --I.i MONJ
NI---- NI ",_
I .�
-lr-- 1 i ". I ss\ __ \' /,,, i , � I'
__ 1,
___�
/ "-, -" 5 ss- ss ss n s 1
sf \
1 - I
1 I , _ 1
- ..
1
/ i I S �I/ I - / '\ \ /
(/
0
\1
1
_ t
�I I-
1
;i' I -
%, I d N :'I '
/ 1
I 1 /N
I
/ I
/ I
I �I i a
\
j, l I
.�'" I I I
- o
/ \ L
//' - ( /
I
1 -
Q. / 1 /
, ( I /
\' 1 _ �`, I \ I- YA ' D I LET 1\ - �
%' TYPI. I I
( )
�. I'
\� _ \
m
/,
1,
'y�s _
1
EXISTING WETLANDS
z
I I' 1 /ss
\ III
�� I
1
\ l
II
I'
- \
'I
.
s �� �s s i �\
\ w i, ,
' 1
_ _ , -
--1
\ -
___
\ _I
II
III
;--k- , l ii I 1 I
_a0"._ ; II
_
- = --
----------_--- _- = - ---- ,
__ w - -
----------
_ --
-- : _,__ - N/F
--
1 DEBBIE STALLINGS KEEN 1
' DB 2748 PG 178 '
1 PIN: 2783-42-6458 1 1
1
1 1 I
L-__- I '
-------------------- : I
N/F I I
I PEGGY GODWIN GLOVER
DB 2010 PG 625 I I
PIN: 2783-41-00330 150 300 1
ZONE: A1450
R
iSCALE IN FEET 1 NORTH
PIEDMONT LAND DESIGN, LLP
8522-204 SIX FORKS ROAD
RALEIGH, NORTH CAROLINA 27615
919.845.7600 PHONE
919.845.7703 FAX
ENGR. FIRM LICENSE NO. F-0843
PRELIMINARY
NOT FOR CONSTRUCTION
Z
O
�
Cl)
0
co
=)
Y
W
W3:
V
L,U
Z
O
Cl)
m
1:
Q
rr^^
14i./
N
w)
C/
I
qt
, ^
Y J
Q
Z
O
x
V
0
Z
I----
Z
�
O
V
Z
O
r^
Y /
3:
ISSUED: 23 MARCH 2O23
REVISIONS:
DRAWN BY:
CHECKED BY:
PROJECT:
JET
MILS
FDBWMS
DRAINAGE
AREA MAP
DWG. NO. 1.0

FA
I
1
1
I
1
I
1
1
I
1
I
1
H ROLD PAGE I
PEARSON PAGE
I
2011 PG 0 ,
?783-76-0538 '
ZONE: AR
1
1
— - 1
1
I
1 '
1
N/F f
�AROLD PAGE i
-ARSON PAGE 414,
11 PG 22 r
33-67-1052
NE: AR
/
/
i
i
r /
I'
i
,
l
i
/
/
I I
/ 1
I;
r'1
,
\o
„
/ k
" I _
I 1 ♦ @ �\
MON AND
'.ER EATMON ` \
PG 237 1' a
-57-31 12
1-
r\ '
\
, 1
N/F
DAVID KERMIT GLOVER
/ SUE JOYNER GLOVER `
EF 2007 1
PB 20-208
/ PIN: 2783-46-2159
\ ZONE: AR
t '
i
Ros HATCH LEGEND
YpE C, Op-TION �o`, Ro �V
PPROX. LOCATION /'', =;./� 30' B FFF ��ic�,
�0" CP&L EASEMENT /� PROPOSED OPEN SPACE
'" �,� \,
(15CH SIDE OF
OH POWERLINE)
•� P
K a 50' NEUSE / P
a:•/ \�/ '' RIVER BUFFER Obi \�, \� EXISTING WETLANDS AREA
7// \
- -
/„t�_;_____ ;,`a ------ MCCONNELL JOHN P
ol MCDONALD IRVIN JR `1
MCCO JOHN P
BROGDEN TED NNELL
e�{' 30.67 AC MCDONALD IRVIN JR `
PB 42 PG 294 BROGDEN TED
PIN: 2783-73-0557 2.14 AC
1
_ _ I;/X\`�,"'\`\ `���`, ' `•' ZONED: B2 PB 39 PG 113 ♦ �. p
�L ' PIN: 2783-62-8755 1
SITS #4
,
FES —17 ! _ ♦ ,
14
MCCONNELL JOHN P
SIT 1;3; ;jj l� MCDONALD IRVIN JR
/ 'v /' I .•i;' ,� ;,1/„ / _, `; BROGDEN TED /
2.14 AC
�:� -273_3 GEXISTING WETLANDS =-PTN
-----
\ — ----- `
I
\
1
,
1
\ \
i
,
/ - I,
' , ���
'i 0 0
f- -- - - -
s
, r
YI •'
,
,
i t GRASS
--------
f
,
X
SWALE
1 i -
i��
I - -
,
_ ♦ rl
1
1
,
1
1
,
/
s,
,
, s
O
II
,
,
_
,
, ,
J,
/
♦ / / - \ \ �'
\
,
•
Y/1
- 1-
_ -
C� _
ti \
'HW-20u
4,
-------------
/
SL-------------
-
�' l
,
-'R BUFFER---
" FUTTURE
/
/
/
/
�.
____-��
0
l
-�
,
LAN{�S
rNG W-ET
--------------- -
I
-- - -- -- 1
V''
C'U R B ;'
I NLET,
-
Ty
\)
I
1
1•
-
GRASS
SWALE
------ FES-38
cl
11
-_ _---=_--------------
-
:------------
I
�
I
,
1 I -------
----------
GRASS SWALE'
----------------
---- FES-58
r,
---------------- ---------- --- --------
i---------------
f
_
,
��-_ -- ---- -_`
-
____
---___- - _--:
-
;-; ---
------------
GRASS SWALE
C&A/GF SP JOINT
VENTURE
C/O LINDA CHRISTENSON
DB 2824 PG 340
PIN: 2783-44-6508
ZONE: AR
FES-92-
2 F`
i
3
I
I
I
----�-
--I ---
I --1 M LFO .� s
j
,
1
_
,
EXISTING WETLANDS
,EXI$TIM3
1 ;WLtLAN C
u
-- \ - _
-
V Ad p
i
_ rt
INLET uj
1 1 r \
'1 II I I z
Tr- I
lk
j.
1
ss U
I
, I
1
\ I
Y 1 �
9 �
, � I
I
a
I I I
r
Y'ARD I LET (TYPL)
I I I
I I I I 1'i I I
I I' 1
\ III 1
\ I l I
I'
I'
\
-
�i
-
II
I�;I li
I I
s- --
=r===__=--==
___ _____- - _ -
===�===_ -==
-----
-----------------------
-----------
DEBBIE STALLINGS KEEN
'
DB 2748 PG
178 '
PIN: 2783-42-6458
I
1
'
1
I
--------------------
I
N/F
1
PEGGY GODWIN GLOVER
DB 2010 PG
625
PIN: 2783-41-003
1
1450
I ZONE: AR
0 150
300
I
,
NORTH
SCALE IN FEET
,
PIEDMONT LAND DESIGN, LLP
8522-204 SIX FORKS ROAD
RALEIGH, NORTH CAROLINA 27615
919.845.7600 PHONE
919.845.7703 FAX
ENGR. FIRM LICENSE NO. F-0843
PRELIMINARY
NOT FOR CONSTRUCTION
Z
0
Cl)
Y
W
W
V
L,U
Z
0
=
Q=)
�O
NU
Lo
Q
Z
j
0
U
oc
0
Z
Z
Z
Cow]
c
J
ISSUED: 23 MARCH 2O23
REVISIONS:
DRAWN BY: JET
CHECKED BY: MILS
PROJECT: FDBWMS
OVERALL
GRADING & DRAINAGE
PLAN
DWG. NO. 2.0

Page 4
Appendix B
Grass Swale Calculations
PLD

Page 6
10-yr flow at Discharge Points
Location
Area
I
PIPE DATA
Outlet
Drainage
Area
(acres)
1-10
Intensity
(in./hr.)
C
Runoff
Coef.
O (Total)
(cfs)
Slope
(ft./ft.)
Min. Pipe
Size (in.)
Provided
Size
(in.)
VfuII (fps)
Full Flow
Capacity
(cfs)
92
7.50
7.08
0.60
31.86
0.005
31.0
6.7
51.02
58
12.10
7.08
0.60
51.40
0.005
37.1
42
7.4
76.99
38
9.30
7.08
0.60
39.51
0.005
33.7
36
6.7
51.02
1
3.10
7.08
0.60
13.17
0.005
22.3
24
5.1
17.28
17
11.50
7.08
0.60
48.85
0.005
36.4
42
7.4
76.99
200
26.50
7.08
0.40
75.05
0.005
42.8
48
1 8.1
109.98
Grass Swale Design
ALLOWABLE
Swale
Q(10)
SLOPE
DEPTH
SHEAR STRESS
SHEAR STRESS
(CFS)
(FT/FT)
(FT)
(PSF)
(PSF)
LINER
FES-92
31.86
0.005
1.53
0.48
2.25
NAG C350
FES-58
51.40
0.005
1.88
0.59
2.25
NAG C350
FES-38
39.51
0.005
1.68
0.52
2.25
NAG C350
HW-200
75.05
0.005
2.21
0.69
2.25
NAG C350
PLD

E
a
Q0
O
N
r�
c\
C)
O
co
Q
X
W
U
0
Q
E
O
N
co
m
O�
O
m
O
0
i
a
0
O>
m
O
0
L�
co
u
0
EL
\
TOB
j
50' N E U S E RIVER
BUFFER (TYP EACH
SIDE OF STREAM) A_
l\N
10,
101
00
125 LF GRASS SWALE
I I I l
ENERGY DISSIPATER \ \\ --
/
it
—. FES — 38 I ' !� � %
,
\' \I WETLANDS
100 LF GRASS SWALE-
ENERGY DISSIPATER/
FES - 58
i --_—_
I I I \ l
---` 175 LF GRASS SWALE ' ' - ----
ENERGY DISSIPATER
FES - 9 2 --- '--- -- ' ,-___-------' _-,
FES-38, FES-58, FES-92
0 50 100 150
SCALE IN FEET
NORTH
/U
FEMA 100-Y R FLOOD LINE
\
280 LF± WOODED AREA \(0/
Al 0% SLOPE
/// 50' NEUSE RIVER 99 L�
' � BUFFER TYP EACH ENERGY
SIDE OF STREAM DISSIPATER
TOB
FES -1
WETLANDS
-----------------
--------------
FES-1
WELL IT� #4 \
\y \
,
'' I
o
AREA AT 1.5% ,--- ,,,---
SLOPE
ENERGY
DISSIPATER
WEL� SI1T
FES -17
—v , ----/ /
FES-17
v v vv vv vv vvvv vvvv vvvv vvv v W ET LA N D S
71
175 LF GRASS SWALE \`
I \
, 1
/ I /
/ I /
/ I /
ENERGY DISSIPATER \
Ei7 7)
\ \\\\ \ \ HW-200
1 \ °
--------------
H W-200
/J�
PIEDMONT LAND DESIGN, LLP
8522-204 SIX FORKS ROAD
RALEIGH, NORTH CAROLINA 27615
919.845.7600 PHONE
919.845.7703 FAX
ENGR. FIRM LICENSE NO. F-0843
PRELIMINARY
NOT FOR CONSTRUCTION
Z
0
� Q
Cl) Z
j
0
U
Y oc
W 0
W Z
N � w
0
L,U Q Z
Z �=)
0 w O
�mw 04 U
Cl) Cn Z
=)O
J
L�
ISSUED: 23 MARCH 2O23
REVISIONS:
DRAWN BY: JET
CHECKED BY: MILS
PROJECT: FDBWMS
DISCHARGE
POINT DETAILS
DWG. NO. 3.0
L-

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
Grass Swale at Discharge
FES-38
Trapezoidal
Bottom Width (ft)
= 2.00
Side Slopes (z:1)
= 3.00, 3.00
Total Depth (ft)
= 2.00
Invert Elev (ft)
= 100.00
Slope (%)
= 0.50
N-Value
= 0.030
Calculations
Compute by:
Known Q
Known Q (cfs)
= 39.51
Highlighted
Depth (ft)
Q (cfs)
Area (sqft)
Velocity (ft/s)
Wetted Perim (ft)
Crit Depth, Yc (ft)
Top Width (ft)
EGL (ft)
Thursday, Mar 23 2023
= 1.68
= 39.51
= 11.83
= 3.34
= 12.63
= 1.32
= 12.08
= 1.85
Elev (ft) Section Depth (ft)
103.00
102.50
3.00
2.50
102.00
101.50
2.00
1.50
101.00
1.00
100.50
0.50
100.00
QQ F^
0.00
0 50
2 4 6 8 10
Reach (ft)
12 14 16
18

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
Grass Swale at Discharge
HW-200
Trapezoidal
Bottom Width (ft)
= 2.00
Side Slopes (z:1)
= 3.00, 3.00
Total Depth (ft)
= 2.50
Invert Elev (ft)
= 100.00
Slope (%)
= 0.50
N-Value
= 0.030
Calculations
Compute by:
Known Q
Known Q (cfs)
= 75.05
Elev (ft) Section
103.00
102.50
102.00
101.50
101.00
100.50
100.00
99.50
Highlighted
Depth (ft)
Q (cfs)
Area (sqft)
Velocity (ft/s)
Wetted Perim (ft)
Crit Depth, Yc (ft)
Top Width (ft)
EGL (ft)
Thursday, Mar 23 2023
= 2.21
= 75.05
= 19.07
= 3.94
= 15.98
= 1.78
= 15.26
= 2.45
2 4 6 8 10 12 14 16 18 20 22
Reach (ft)
Depth (ft)
3.00
2.50
2.00
1.50
1.00
0.50
MI
_n rn

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
Grass Swale at Discharge
FES-92
Trapezoidal
Bottom Width (ft)
= 2.00
Side Slopes (z:1)
= 3.00, 3.00
Total Depth (ft)
= 2.00
Invert Elev (ft)
= 100.00
Slope (%)
= 0.50
N-Value
= 0.030
Calculations
Compute by:
Known Q
Known Q (cfs)
= 31.86
Highlighted
Depth (ft)
Q (cfs)
Area (sqft)
Velocity (ft/s)
Wetted Perim (ft)
Crit Depth, Yc (ft)
Top Width (ft)
EGL (ft)
Thursday, Mar 23 2023
= 1.53
= 31.86
= 10.08
= 3.16
= 11.68
= 1.19
= 11.18
= 1.69
Elev (ft) Section Depth (ft)
103.00 3.00
102.50
2.50
102.00
101.50
2.00
1.50
_
101.00
1.00
100.50
0.50
100.00
as tin
0.00
0 50
2 4 6 8 10
Reach (ft)
12 14 16
18

Channel Report
Hydraflow Express Extension for Autodesk0 AutoCADO Civil 3D0 by Autodesk, Inc.
Grass Swale at Discharge
FES-58
Trapezoidal
Bottom Width (ft)
= 2.00
Side Slopes (z:1)
= 3.00, 3.00
Total Depth (ft)
= 2.50
Invert Elev (ft)
= 100.00
Slope (%)
= 0.50
N-Value
= 0.030
Calculations
Compute by:
Known Q
Known Q (cfs)
= 51.40
Elev (ft) Section
103.00
102.50
102.00
101.50
101.00
100.50
100.00
99.50
Highlighted
Depth (ft)
Q (cfs)
Area (sqft)
Velocity (ft/s)
Wetted Perim (ft)
Crit Depth, Yc (ft)
Top Width (ft)
EGL (ft)
Thursday, Mar 23 2023
= 1.88
= 51.40
= 14.36
= 3.58
= 13.89
= 1.50
= 13.28
= 2.08
2 4 6 8 10 12 14 16 18 20 22
Reach (ft)
Depth (ft)
3.00
2.50
2.00
1.50
1.00
0.50
MI
_n rn

Page 5
Appendix C
Energy Dissipater Calculations
PLD

Page 7
Energy Dissipaters
3 --
20
5
0
fX
Figure 8.06c
2
p APRON MATERIAL
N
LENGTH OF APRON
TO PROTECT
CULVERT
L1
TO PREVENT SCOUR
HOLE US E L2ALWAYS
L2
1 STONE FILLING (FINE) CL.A
3XD,
4xD,
2 STONE FILLING (LIGHT) CL. B
3 X Do
6 x D
3 STONE FILLING (MEDIUM) CL. 1
4XDo
8XD
4 STONE FILLING (HEAVY) CLA
4XDo
8aD,
5 STONEFILLING(HEAVY) CL.2
SXDo
IfIxD,
6 STONE FILLING(HEAVY) CL.2
6XD,
IOXD
7 SPECIALSTUDYREQUIRED (ENERGY DISSIPATORS,STILLING
BASIN DR LARGER SIZE STONE),
Figure SUMd
W,dth=3 time pipe dia. (mia)
5' 10" is 20' 25'
DIAMETER (Ft.)
Diameter
(Inches)
Mannidg's
"n"
Min. thickness
ofhriog (inches)
Fine
3
0.031
9 12
Light
6
0.035
12 t8
Medium
13
0.040
18 24
Heavy
23
0.044
30 36
(CNanneis) (DAMP-wm)
Required Energy Dissipater type/Dimensions
Diameter Velocity
APRON
DIMENSIONS
Outlet
inches (fps)
Zone
Rip -Rap
Len h ft
Width ft Thickness(in)
92
36 6.7
2
Class B
18
9 18
58
42 7.4
2
Class B
21
11 18
38
36 6.7
2
Class B
18
9 18
1
24 5.1
2
Class B
12
6 18
17
42 7.4
2
Class B
21
11 18
200
48 8.1
2
Class B
24
12 18
PLD