Approved Revised Documentation - 4th ReviewsrL
a �
Public Works Department
City of Atlantic Beach
Comp. By: Reynold Peterson, P.E.
Date: 4/25/2023
Permit No:
Address: 831 Beach Ave
RECEIVED
By Toni Gind/esperger at 4:19 pm, Apr 27, 2023'
```�111111111//�77''
Reynold Digitalle ' • p ,
by Reytml i' No. 84559 2
D. Petersa * * S
Date:21tJ23 4.25
Peterson 12:24:4 STATE OF �Z
Re,, uired Storage Volume ��S�ONAi IE���
Criteria:
Section 24-66 of the City of Atlantic Beach's Zoning, Subdivsion, and Land Development Regulations requires
that stormwater runoff from impervious areas be stored onsite. Volume to be retained is as follows:
V = CAR/12 which is the Modified Rational Method for estimating stormwater runoff
Where: V = Volume of Runoff to be stored (cubic feet)
C = Runoff Coefficient, 0.92, the difference between impervious area (C=1.0)
and undeveloped conditions (C=0.08).
A = Impervious Area (square feet)
R= 25 -yr / 24 -hr rainfall depth (9.3 inches for Atlantic Beach) p
Onsite Storame Volume Required for Impervious Area:
Lot Area = 17,509 ft2 ,,)(/r✓� 4
Impervious Area (A) = 8,857 ft2 V = 50.6%V
V = 0.92 x 8,857.0 x 9.3
V= W
Provided Storage:
Areal Area Storage
(ft) ft2 (ft 3)
Area 2 -LEFT REAR
Area
Storage
(ft)
(ft2)
(ft)
13.00
416
1,798
14.2:
2,461
Area 3 - RIGHT REAR
Area
Storage
(ft)
/ft)
(ft)
0
0
01
Inground Storage: = A*d/pf
Total Storage Area at TOB (A) = 2461.1
Depth to ESHWT from BOTTOM (d) = 5.0
Pore Factor (pf) = 0.4
Inground Storage Provided = 4922.0
Required Treatment Volume = 6,315
Supplied Treatment Volume = 6,720
Sideslope: 14 :1
12
THIS ITEM HAS BEEN DIGITALLY
SIGNED BY: REYNOLD D.
PETERSON
PE NO 84559
ON THE DATE ADJACENT TO THE
SEAL. PRINTED COPIES OF THIS
DOCUMENT ARE NOT CONSIDERED
SIGNED AND SEALED AND THE
SIGNATURE MUST BE VERIFIED ON
ELECTRONIC COPIES.
BOTTOM
TOB
BOTTOM PUBLIC WORKS
TOB
{ APPROVED
BOTTOM D IE
TOB { LET
ft2
ft, default is 2.0 ft, verify onsite ESHWT
default is 0.4
ft3
ft3
ft3
Retention 831 Beach Ave CALCS 4/2512023
iww-_v
PUBLIC WORKS
61 APPROVED
{ } E ILD
{ } PILI L ilk:
MAP SHOWING SURVEY OF
LOT 1& AM 11E SOUIN 1/2 OF LOT 17. CUs IMNOR AS RECORDED N PIAT BOON 25.
IWE G2 OF IE CURRENI I'UBUC RECORDS OF OUV& OaMIY FLOROe TOOMER AFIM Rr
LY EXIFNL ICON OOFFUILY TK NOS LINE
IN OF F TIE S "OND UTBH t�OF LOT 17 ROUNDED ON
e TIE SOUTH BY AN EASITTaY E%TQODN OF THE SOUTH UNE OF UM It AND BOUNDED
ON THE FAST By THE ER0.90N COMROL UNE FDR DUWL C0UN1Y AS RECORDED IN PIAT
ON 05. PAOM W.
By
1-- I BO5a'% xwD SGB
9 / p 14 C N�ArtO my u[ Asan a 1. M MYEB➢ PORtTI AND SIDOP 9uNL E
SUPED AT MN. IX AUY FRTA SIDNCRNE AT 1 E
OF — — AND S .—
Y E ATYW OROP SNAL E 4 INCHES.
1is%,w X. w s oma rt r,ac. sw�its Nxwn 2 GDMD U£Y. AT iLU0A1NN SNILL E YN. SM
BFLON FF F1EV.
IA Nr m... M w.. a �a a OONIRAOIOII I HIA11 E IEq A . E ""0""I
IESIQN FIEYATIpS epeealunne u
LJII fff �°m,A,R�i,,.�an.,i,Na a
+. u AnaarTEcnNAL aTc EeAx TaeRrEnxowu�° pN {= r®>a
IY OETAES.
Reynold Digitall�'�s'
�•�'_ I - �a�mrt m�
--- —-',?3VERFLDW 5TRUCTUR�' I 1 •. y PeterIDn • m {c ¢ �p
1 1-12' YARD DRAIN ss I§ rtMmA„L,N.nO� . D.
I TOP ELEV 14.1 _ �:� - _ ,a z � I 1 YARD GRAIN - "" "" - -�
a I Peterson 12:23: e
INY 12.0 TOP ELEV 13: 6 `
e _ }� J NV 12.2
I 1•� •� ',x� �
: I� RL-
�I
g,+ •e.' _ - 154 LF 1 SIS .w 1 I ..rtE.eNDwNa
W�T7 f6'g. i K DRAINI.T 11
I ��
Y sI 11�I{t1� 1r wT cel ';1 / i wnN �xea
z
$ P yyyy q
o,S�iiARDIE BOARD FENCE I a a a
nl �rll lll� ��� �pS(y��IOSS I�}$` Ni I I W/ MARINE GRADE `11 FENCE DETAIL v°�
VO�TTOMtEATMENT z 1 �`m
m z
§ R IA I
-T6YARII TOP DRA13.0 pRAINIA.P E -FLOW ARROW PROPOSED SPOT EL REVISIONS
6' SOCK. DRAIN IINV 12.2
oT Is I 4-XPOST-FLOW ARROW —%— HARDY BOARD FENCE
OVERFLOW STRUCTURE �I � 1 II { — - 1 -
12" YARD DRAIN--m—HARDIE BOARD FENCE --- PROPOSED 6' SOCK DRAIN
I TOP ELEV 14.1 I s I 1 1 W/ MARINE GRADE
INV 1 0 X11 w ` I BOTTOM TREATMENT
I �
All
gGRAPHIC SCALE
1{$� v II RECEIVED SHEET No.
_ �o Eg 11 � 1. F Br rexcA,u.wrtw•r °:mp..Ap n. rap
Q I I F-> £� I 1.r �� II`'� 'INeaT,•