PW Denied DocumentationComp. By: D. Martin
Date: 3/14/2023
Public Works Department L)
k
City of Atlantic Beach
Permit No: RESO23-0345
Address: 163 Belvedere `. Q
Required Storage Volume
Criteria: J �r
Section 24-68 of the City of Atlantic Beach's Zoning, Subdivsion, and Land Development Regulations requires ti /
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) il
C = Runoff Coefficient, 0.92, the difference between impervious area (C=1.0)
and undeveloped conditions (C=0.08).
A = Impervious Area (square feet) J,
R= 25 -yr / 24 -hr rainfall depth (9.3 inches for Atlantic Beach)
Onsite Storage Volume Re uired for Impervious Area:
Lot Area= iu,uw ft2
Impervious Area (A) = 2,126 ft2 =
V = 0.92 x
V - ft3 II
Provided Storage: 1'
Area 1 - Relative Elev. Area/ Storage
{ft] (ft) (ft)
175 36f
545
Area 2 - Relative Elev. Area Storage
(ft) (ft) (ft)
I)OIED
21.3%
2,126.0 x 9.3f
12
dy G /3
idellope: 2
BOTTOM size: -4 X -4
TOB size: 0 X 0
_
BOTTOM
size: -4
X
-4
131
TOB
size: 0
X
0
Area 3 - Relative Elev. Area
Storage
(ftj (ft2)
(ft3}
BOTTOM
size: 0
X
0
TOB
size: G
X
0
Inground Storage: = Xd/pf
Total Storage Area at TOB (A) = 676.0 ft2
Depth to ESHWT from BOTTOM (d) = 4.5 ft, default is 2.0 ft, verify onsite ESHWT
Pore Factor (pf) = 0.4 default is 0.4
Inground Storage Provided = 1216.8 ft3
Required Treatment Volume = 1.516ft3
Supplied Treatment Volume = �,6411
Retention W.R. for sending (Working Copy) 3/14/2023
Comp. By: D. Martin
Date: 3/15/2023
ti
Public Works Department
City of Atlantic Beach
Permit No: RESO21-0345
Address: 163 Belvedere Street
Required Storage Volume
Criteria:
Section 24-68 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 = CAR112 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)
t
Onsite Storage Volume Required for Impervious Area: 1 .�
Lot Area = 10,000 ft, �!
Impervious Area (A) = 2,096 ftp = 21.0%
V = 0.92 x 2,096.0 x 9.3 / 12
V= 1,494 ft3nra0avii
� f UTA d�"" G✓ � fVP �� c � ,C Ul � Q��
Provided Storage:
Area 1 - Relative Elev. AreaStorage
Sideslope: 2 :1
{ft} ftZ 4ft)
3
68
BOTTOM
size: -4
X -4
132
TOB
size: 0
X 0
Area 2 - Relative Elev. Area
Storage
{ft (ft2)
(ft3)
4
BOTTOM
size: -4
X -4
114
TOB
size: r'
X 0
Area 3 - Relative Elev. Area
Storage
ft (ft)
(ft)
0.0
BOTTOM
size:
X 0
"
TOB
size:
X n
n Inground Storage: = Md/pf
Total Storage Area at TOB (A) =
ft2
Depth to ESHWT from BOTTOM (d) =
ft, default is 2.0 ft, verify onsite ESHWT
Pore Factor (pf) =
0.4
default is 0.4
Inground Storage Provided =
4
ft3
Required Treatment Volume = 1,494 ft3
Supplied Treatment Volume = 564 ft3
Retention W.R. for sending (Working Copy) 3/15/2023
G t"'`$ , ��41W '
163 Belvedere St.
Fill in highlighted QTY
Insert SF QTY Below
Solid Structures
Impervious (SF)
Main Slab
1526
Driveway and Walk
375
Brick Drive Way NEW
0
Misc Conc.
40
REAR PAVER NEW
0
Covered Porch (Attached)
185
Pool Coping
0
Enter Pool Area Total --->
0
50%
Pool Area Caculation at 50%
0
NEW ADDITION
2126
DEMO
0
Total New Impervious
2126
(NEED WATER RETENTION)
YES
Total
2126
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DOWNSPOUT (TYP.)
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Non -Solid Structures Pervious (SF)
LOT SIZE 10000
I
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3:16 PM3/14/2023 Permit #RES021-0345 Takeoff by:Derek Martin
gaiconsultants,com I transforming ideas into reality„
Permit No:
Address: 163 Belvedere Street
Required Storage Volume
Criteria:
Section 24-66 of the City of Atlantic Beach's Zoning, Subdivision, 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 of estimating stormwater runoff
Where: V = Volume of Runoff to be stored (cubic feet)
C = Runoff Coefficient, 0.67, see attached for runoff coefficient
calculations
A = Impervious Area (square feet)
R = 25 -yr / 24 -yr rainfall depth (9.3 inches for Atlantic Beach)
Onsite Storage Volume Required for Impervious Area:
Lot Area = 10,000 f t2
Impervious Area (A) = f t2 = 21.0%
V= 0.67 x x 9.3 / 12
V= 1088 ft3 Required
Provided Storage:
Area 1—
Area
Storage
Relative
( 2
(f t3)
Elev. (ft)
7.9
175
66
8.9
545)\,360
Sideslope: 4:1 Around
BOT
'�e i DENIED
Area 2 —
Area
Storage
Relative
(ft2)
(ft3)
Elev. (ft)
7.5
2
66
8.5
131
Sideslope:
BOT
TOB
1
4:1 Around
9 �Vjdr- r8'
Elk"
gaiconsultants.com I transforming ideas into reality.
7tiAnrlve
ea Storage Sideslope: :1 Around
(f) (ft3)
Elev. (ft)
7.5 BOT
8.5 135 �'\, 68 , TOB
Inground Storage = A*d*pf
Total Storage Area at TOB (A) = 811.0 f t �_
Depth to ESHWT from BOTTOM (d) = 2.0 f t, take
Pore Factor (pf) = 0.4 default is 0.4
Inground Storage Provided = 648.8 ft3
Total Pond Storage = 494 ft3
Required Treatment Volume = 1,088 ft3
Supplied Treatment Volume = 1,142 ft3
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