Conservation Commission Agenda (linked)

BASIN TOP ELEV.: 131.50 — T Se EE
SPILLWAY ELEV.: 131.00 —
1.4°+ OF
FREEBOARD
TOP OF GRATE
ELEV.: 131.00 |
—<——_—_—
100—YR ELEV.: 130.06 \
SO-YR ELEV.: 128.42 ————
25-YR ELEV.: 127.92
LOW-LEVEL 2” DIA.
ORIFICE ELEV.: 128.50
35,5004 C.F. OF WQV
_ 1,350+ C.F. OF WQV PROVIDED PROVIDED UP TO a
1O—YR ELEV.: 129.17 UP TO TOP OF RIPRAP BERM LOW-LEVEL ORIFICE yo
(103% OF WQV) (267% OF WQv) ELEVATIONS FOR
5-YR ELEV.: 128.80 THE ENTIRE
\ \ \ / BASIN FOR THE
a 2—YR ELEV.: 128.46 a Aa 5 7 1-YR THROUGH
ee \ Jot \ y 100-YR STORM
1-YR ELEV.: 128.10 ———aZ 4 aaa
te » RIPRAP we STORMWATER pp PP
SN WQV SEDIMENT FOREBAY to a SEDIMENT! 7 MANAGEMENT BASIN |
(1,313+ S.F. REQUIRED) = /)YFOREBAY QQ ia
KIA IL © =
LOS <=
— — 1 see ) Cy eo aN i
BASIN BTM. ELEV.: 127.00 is eee
APPROX. 15” HDPE r r r r f Oo
PIPE INLET
APPROX. 12” HDPE
OUTLET CONTROL ——= PIPE OUTLET
STRUCTURE
/\
BASIN 1B CROSS—SECTION DEPICTING STORMWATER ELEVATIONS
HORIZ SCALE: 1°=4’, VERT SCALE: 1”=1’
DATE: SCALE: PLAN PREPARED BY:
MAY 21, 2021 | AS NOTED BASIN CROSS-SECTION D) G © INDIGO LAND DESIGN, LLC
JOSEPH WREN, P.E.
DRAWN BY: CHKD BY: PREPARED FOR 1721, LLC eRe CT REG. NO. 21090
RG JW 430 MOHEGAN AVE. PARKWAY & 23B OLD NORWICH RD. 40 ELM STREET, 2ND FLOOR
OLD SAYBROOK, CT 06475
TAX MAP 76 LOTS 10164 & 5600
DWG. NO.: SHEET NO.: 
PHONE: (860) 388-9343
BCS-1 1 of 2 by D WEB: INDIGO-LAND.COM

\ 100-YR ELEV.: 128.98
Re BASIN TOP ELEV.:
130.50
TOP OF GRATE
ELEV.: 10.00 |
SPILLWAY ELEV.:
1.5’+ OF
FREEBOARD
6.0’
ELEVATIONS FOR THE
ENTIRE BASIN FOR THE
1-YR THROUGH 100-YR
STORM EVENTS (TYP.)
BASIN BTM. ELEV.:
PIPE INLET
Yeh
50-YR ELEV.: 128.42
LOW-LEVEL 2” DIA.
25-YR ELEV.: 127.92 ORIFICE ELEV.: 127.00
20,100+ C.F. OF WQV
PROVIDED UP TO
LOW-LEVEL ORIFICE
(508% OF WQV)
10-YR ELEV.: 127.20 '
i L \ VA STORMWATER
5—YR ELEV.: 126.56 4,000+ C.F. OF WQV PROVIDED i /
UP TO TOP OF RIPRAP BERM |
(101% OF WQV)
fo
Ny)
| LA
2—-YR ELEV.: 125.74 Ee
=_ aia
Po eae \
- > 1-YR ELEV.: 125.18 la C? if, ST
aie \ |
—— WQV SEDIMENT FOREBAY ; ee I AN TM, STORMWATER | | | SZ | fo mee ee
(3,955+ S.F. REQUIRED) OG 4 )< 7SEDIMENT ) AN MANAGEMENT BASIN
A ky pai ee p= 3,
a 24 a wa OS mA OS
\
x! 1 |
Pp
130.00 —
6.5"
OUTLET CONTROL ——=
STRUCTURE
PIPE OUTLET
\/\
BASIN 1C CROSS—SECTION DEPICTING STORMWATER ELEVATIONS
HORIZ SCALE:
1°=4’, VERT SCALE: 1°=1’
BASIN CROSS-SECTION
DATE: SCALE:
MAY 21, 2024 AS NOTED
DRAWN BY: CHKD BY:
RG JW
DWG. NO.: SHEET NO.:
BCS-1 2 of 2
PREPARED FOR 1721, LLC
430 MOHEGAN AVE. PARKWAY & 23B OLD NORWICH RD.
TAX MAP 76 LOTS 10164 & 5600
WATERFORD, CONNECTICUT
40 ELM STREET, 2ND FLOOR
OLD SAYBROOK, CT 06475
PHONE: (860) 388-9343
Smart Growth
by Design J)
PLAN PREPARED BY:
INDIGO LAND DESIGN, LLC
JOSEPH WREN, P.E.
CT REG. NO. 21090
WEB: INDIGO-LAND.COM