HomeMy WebLinkAbout1999-06-28 Stormwater Analysis SPR f
A CLAT INS',
April 19, 1999
Planning Board
7 Charles Street
Forth Andover, NSA 01 45
Re,: Proposed Addition and Parking
35 1 pillow Street/ Lot A,
North Andover Business Park
Dear Board Mein.bers:
()ur clicnt is proposing to add ail addition to the west side of the existing building with additional
paicking. The increase in inlpervious surface is approximaely 4,300 square Iect. Also, our client
wishes to add approximately 3,900 square feet of additional parking to the east side of the
building,
The additional impervious area toeated on the, west side of the building will be directed to catch
basin 43 through the use of a vegetated Swale, roof drains and an additional catch basin. The
vegetated s ale and additional catch basin shall provide ti-atment for the runoff ftom the new
paved surface prior to it entering the existing draipage system. This area is shown as
subcatc,hment 1 in the hydrology calculations.
The proposed impervious area located can the cast side of the buildfi g will sheet flow off the edge.
of the paved surface into an existing lawn and wooded area, This flow will eventually reach an
existing catch basin on Willow Street Extension. This idea is shown as suboatchment 11 in the
hydrology Calculations,
By examining the Hydrology calculations attached you will note that there, is an increase in the
100 year flow rate for subcatchment 1, of 0.5 efs +1-. This increase is expected since the
impervious area within the subcatehment has increased. Upon I'arther review, the calculations
show that this increase is mitigated by the time the flow reaches the existing detention pond (i.e,
the 100 year floret elevation an(t outflow of the pond are the same r'rom pre to post developed
condition). Subcatchment 11 also shows an increase in the 100 year flow rate of approximately
1,3 cfs from pre to post developed. This increase is a]l o o pected since existing lawn and
- ENGINEERS * LAND SURVEYORS * LAND USt:PLANNERS
447 Old Bostun Road U.S- Route #1 Fepsfield, AAA 01983
(9713)887-8586 FAX (978) 337-3480
i
P1amiing Board Page
April 19, 1999
wooded areas will be replaced with paved siuTaces, however, it is not considered sigJifficant,
This flow wi11 eventually reach an existing cateb basin on Willow Street Extension. The increase
in flow rate will riot have any significant impacts at the location of the catch basin. This basin
discharges to another basin that discharges to the existing central detention area of the basiness
park.
By introdueriig the detention pond into the drainage design for this site back in February 1993,
when the first addition was proposed, the post developed flow rate was decreased by 1.6 cfs (see
attached calculations). Based mi revisions to the Hydro CAD software over the years, you will
note that the current pre developed flo •of 5.7 efs does not Match the Febmary 1993 post
developed flow of 5,6 cfs, For all practical purposes thoy are considered equal, however we shall
use the pre developed flog of 5.7 cfs for analysis pu oses. This results in the fact that post
developed conditions at the, location of the existing pond outlet are 1.5 cfs lower than existing
couditions back in February 1993. Therefore, evert with the increase of 1.3 cfs for suhcatchment
11, the post developed flows offsitc for this site are still 02 efs less than existing conditions in
February 1993.
Also enclosed Tease fired the 100 year storm summary ca relations for the cxlsting central
detention pond for the business park dated November 30, 1989. You will 1-10te that the existing
poTid has approximately 2.& feet of freeboard with the ability to store approximawy 125 acre-feel
of water. This central detention pond could easily mitigate the 1.3 cfs increase if it was
deteimined that current existing conditions must be mitigated.
Wherefore, it is our assertion that the proposed additions of impervious surface will not have, an
adverse effect on the surrounding properties or resource areas.
If you have any questions please do not heaitate to call.
incerel y,
THOMAS E. NE'VE AS SOCIKfE S,INC
John M. Morin, PE
Executive Vice President
JWM/knin
Attachments
AQ230 0pnNALF8.wps
) . . .
F
. QeEa for Eake N, Joy . Pre Developed Page I
Prepared by Thomas E. Neve Asp ci t . Inc. , @sty , M 14L Apr 9e
■ , 906-1998 &2ulied Microcomputer Systems
WATERSHED =I &
P F PO-5-r 0 E-VF—L-O P E.D
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Data for Bake N' Jay
1'Y6 Developed Page
TYPE III 24-HOUR RAINFALL- 5-40 'N (:LBO Yr Storm 14 Apr �9
Prpaecl by Tomas E. Neva MA
}associates, 'PoiaSf ied,
S ATCR T 1 Area FlowIrtg To Ca 03
S a 12.05 €RS, VOLUME= .26 AF
PEAK- 2 .72 CF
SCS ' -20 MATHOD
ACRES CH 26 98 Pavement TYPE III 24-HOUP
-22 -?A.. Open Space, 00� S
1, Soil C PAF�iF,�� GAO IN
NPAN= 5-3 0 FIRS, dt� .0 5 FIRS
.48 . 97
3 .9
Grass : Dense nt .24 L-35' P2=3 .1 in $�.064
TR-55 SST PLOPQ
Smooth surfaces Tt-.G11 L-65' P a3 .�. in 9�_02S .2
SHALLOW C0NCEWZRAMM f VpL D FLOW
Laved Irv=20-2282 Lw35 ' Ve-A28 '/ ` V-3 .$ fps ----------
Total Length= 135 ft Total Ti�= 4 .9
SUBCATeMaNT 2 Area 910xing tO CH #4
peAK= 1.70 CPS 0 1 -03 HRS, VOLOME# .12 AFF
CS 7R-20 METROD
ACRES CH 'T`YPP III 24-'aOUR
21 99 Pavement.06 RAIZ+IFALT,� 6 .40 I�
4 Open AC , Good. $OIL C SPAN= 5-30 HFRS, dt-.05 HPS
.27 93
C n 3 .8
SuBcAvCMUMT 3 Area Slomiag to CE 45
PEAK_ 2.00 CFS (g 12 •DI HiR , VOLCF[+4E- 14 AF
5CS TR-20 ME` ROD
TYPE III 24-HOUR
.29 99 Pavement 1 AINFAL,Lm 6.40 IN
SPAN= 5-30 nS, dt=.05 FIRS
2A
DIRECT MTMY
i
I
Data for Sake N' day - Pre Developed Page- I
TYP9 III 2+4-HOUR RAVMAI,I,= 6.+40 IN (104 Yr Storm
Prepared by Thomas E. Cleve Associates, Inc. , Topufie3d, MA 14 Apr 99
i
SIIACATC3R4IT 4 Area Flowing To CS ##6
PEAXC 2 .0E CFS 9 12.01 HRS, OLUMS� .15 AF
ACRES 0 SCS TR- 0 METHOD
.30 98 Pavement TYPE III 24-HOUR
RAINFALL= 6.40 Ili
SPAN- 5-30 HRS, dt=.05 HRS
Mthod CommentT mirk
'DIRSWT ENTRY 2.5
SIRCATCOMV S Area Flowing '20 Pond I
PFAKm 2 .02 CFS � 12.02 HRS, VOLUME= .15 AF
ACRES CI+E SCS TR-20 METHOD
.30 95 Roof TYPES III 24-HOUR
RAINFALL= 5.40 IN
/� SPAS= 5-30 HRS, dt=.05 HRS
L mm TC anZ
DIRECT TATRY 2 .9
SuBCATCMMT 6 Area gloaming To Pond I
PEAK= 2.05 CFS 9 12 .06 HRS, VOLOMEw .15 AF
ACRES CN SCS TV.-20 METHOD
.12 98 Pavement TYPE II1 24-HOUR
.30 74 1 Open Space, Good, Soil C RAINFALL= 6 .40 IN
.42 81 SPAN= 5-30 HRS, cat-.05 HR
D1R9CT MMY 5.9
�
Data for Bak■ N' joy - pra Developed Page 4
TYPS III24-HOUR RAMIMAL 6.40 I■ (1 0 Yr StOrm
Prepared by E. §eve A, c t . c. , a! la. la Apr a§
5tMCATCMM1= 11 Area Flowing To CE
2EAK- 2 .33 CFS m .1�7 HR3, VOLUME= .22 Ar
ke223 . S TR.22 �OQ
HOUR
.29 98 Pavement
71I 2 .
M 74 open Space, Good. soil 2 RAINFALL= 6,40 IN
K , off, 5 1 c AN= 5.3O HRS. dt=. �
.se e5
eer Icai
TR.ss sITEs2 FLOW . 8 .0
G£ s : Dense ==.24 Bo• �.2 .1 in s-.056 '/'
TR.55 &�T 7L� G.o
Woods; Light uRderbrush n=.4 L=201 =3.1 in E;�.a
SLOW co■��/UPS FLOW
§
Unpaved Kv-. .1345 L=0' 9=.02 V=2.28 fps
Total Length= 1-2 0 Et Total T 14 .1
P ache �
Data fo-r Bake N' joy - pre naveloped
rns III 24-HOUR RAINFALLm 6.40 IN ( a Yr S , MA 14 Apr 59
Prepared lair Thom�a E. eve Associates, Inc- , Tpsf ieid
i
RRACX 3 CH3 to CE4
Qin - 2 ,72 P'S @ 12.05 ERS, VOLUME 0 AF AF, p.Tr �'�= L41, LAG= SA MIN
gout= 2.34, CFS 0 12.13 TARS, VOLUME
DEPTH END AREA DrSCH
{�'� 12M PIKE S`TOR- IND+TRANS METHOD
PEAK DEVTH= 1.00 FT
0.0 0.0 0,00
.1 0 .0 ,04 e�- .015 PEAK V�LOCz'rY� 3.1 FPS
-2 .1 .19 L THa 58 FT
TRAVEL TD119 - .3 MIN
.3 .2 .42 SLGp2= .00&8 PT/FTS'p Y 5-30 3�S`r dC-.05 I#RS
.7 '6 1.79
.S .7 2.09
.7 2.28
A 2.30
1.0 A 2.2E
1.0 .8 2,14
RRA(M 2 C24 to CBS
Qin - 3.83 CFS '9 12.04 Sr VOLUME- _32 AV - 50t, LAG= 0.0 MIN
ut= 7 .93 CFS Q 12.00 ERS, VQLUNfE= .32- AF, AT TM
DEPTH 2ND AREA DISCH S. p._ D+TRAM$ METHOD
yFT 12w PIPE PEAK DEPTR' 1.00 FT
0,0 O ,D 0 .00 PEAK VELOCITY= 2 .6 FPS
.1 0.0 .04 a= ,015 3 MTN
2 .1 .17 F�E�ICr'�'F�= 44 Fr TRAWL TYMS =
,2 .38 ST,OFH= .0039 12,T/F"3 SPANS 5�30 IDS, cat=.05 HR
.7 .6 L.5L
g 7 1.88
7 2.06
9 .8 2.07
1.0 .8 2AG
1.0 .8 1.93
REAJM 3 CH5 to CR6
Qin m 3, 93 CPS 9 12.01 IMS, VOLUME- 6 AF AF, A'TT � 56t, LAG= O.Q Kim
Qaut= z.75 CFS 0 11,80 HRE,
DEPTH END AREA 3 ISCH STOP.-M+TRANS METHOD
12" 121M PEAK DEPTH= 1.00 FT
0.0 0.0 0.00 pF VELOCITY= 2 .5 FPS
,1 0.0 .04 n� ..sr0[r1Q5 �r� +�,RAVET TEO .4 MIDT
2 .1 .15 LL�'�GTRa Ejig F 1f3++Y GY Jy`rii
3 2 .34 SLOPE= .0032 FT/FT SQ1N� 5-30 AR
dt�.05 HRS
7 .6 1.46
7 1.71
} .7 1.$6
1.0
1.0 $ 1.75
Pale 6
a s for Rake N' joy - pre Developed
TYPE III 24-HOUR RAINFALL- 6-40 "q (100 Yx Sto= 14 Apr 99
prepared by ThamaS B. Neve Associates, 1nc. , Tapstield, MA
RSACR 4 CH6 to Uri
Qirl � 3 .80 CFS 0 12-01 HRS' VOLUM2= .61 AF
Qout- 1.9G CFS @ 11,72 H S, V'O�, � 61 AF, ATTEN= 50 , LAG4 0 .0 v
nEPTH ENT} AREA DISCH
_ 1�" ELF$ STOR-FI+ID}'�'�tANS 'T'HOD
FT) PAC DEPTR= 1.00 FT
0.0 0.0 0.()U PEAK VEE,OCITY= 2 .6 FPS
.i 0 .0 .04 n_ .015 iTaVEL TIME _ .5 MTN
.2 ,1 .i6 LENGTH- 79 17T
.3 .2 .35 SLOPE- .0034 FT/FT � 5�3 HISS, dtF.05 HRS
.7 .6 1 .51
.B 7 1.7G
.g _7 1,92
.9 g 3-.34
1.0 .8 L.92
1.0 .8 1.60
R92CB 5 DMFtl to Flared End (Pond 1)
Qiri = 1.90 CFS (a 11.72 HRS, VOL E= .61 Ali
Qcut= 1.88 CFS 9 11-72 HRS, VOLUME' T�
.61 A�, ATI�= It-, ice= -� MIN
DSPTH ENI) AR8LA DISCH s RRr +TRANS METHOD
i5tt pYPS '65 F'T
01 _ .015 P$AW VK'GCIT�= 2.9 L7P
.1 •1 n. 'TRAVEL TIME _ .2 MI
.3 .2 .29 L„F�CzT�n 25
4 .3 .66 STJOPE- .0036 FT/FT SpAI`= 5-30 HRS, dt-.05 ARS
.9 .9 2 .91
1.0 1.l 3 .28
2.1 1.2 3 .58
1.2 1.2 1 Al
1.2 1. 2 3.55
1 .3 1.2 3 .36
Page
Data r Bake ■' Joy . ,re Developed �9c 7
Ty■E III oUR RAINVAL 6.40 IN ( o yr Sto= Ia pI 99
prepared by 2 m Z. K@ Asp c teS, r c. , @a£ie .
MA. .
POND I 2xisting Pandimg Area
n � 5.70 CF9 # 12 .04 NRS, VOLUME= .91 ae
TN
=t= 5.70 � a 12_05 �. VOLUME- .89 AF,
k�= ot. G= _G M
13LEVATION CIJM.STUk STOR-IND METHOD
W PF�AK STORAg£ _ .03 A@
248 .0 O.0o rRAK ELYVATION= 249.3 @T
250.0 .off FLOOD E» N= 250 .0
FT
START EDEVATICi N= 24e .0 FT
AN= 5-30 HRS. =.05 ERS
. - 23.5 mi ( .89 AF)
Ram INVERZ & �
1 @ 2N9 .2• 10, 3�p-cR3eTZD RECTANGULAR VmI2
H]
Page
Data for Bake uL ,Toy - Post Dmvelopad
Typg Ili 4-HOUR RAINFALLm 6.40 IN 10 Yr or�MA i4 Apr 99
prepared by Thoinas 8. Neve Associates, Inc. � TOPys
$f j eld,
Area 171.0wi3}g To C8 43
pEA1Cy 3 .17 CFS 9 82 .41 HRS• .22 AF
SCS 'rR-20 MTHOD
g Z'YPII. I11 24-HOUR
.36 98 pavement RATMFALL= 6 .40 'N
_L2 7� Open Space. Good, Soli C HPALJT 5-30 IRS, dCy.05 HRS
.48 ` n
ilig 1.2
Tm-5 s SmmT FLCSF
01� p2=3.. i kri s�.02 ,
1 -0
Sm +nth sC0WC es '�"M)f D FLOK
SUALL �* Q Q A a + a fps
gavaci Kv.20.3282 Ly170° S=.02 r2 .2
Tpta1 Lesigr-h= 270 f Total Fc-
C AATCT "T 2
Area Flowing TO CB #4
p$AT = 1.7 Q CVS 0 12-03 FIRS,
VOLUME- -12 AF
SCS TR- 0 METHOD
g TYPE III 24-HGTJR
.21 99 gilve*nenC RATIFALL= 6.40 IN
6 71, open Space, Good, Soil CgPAIt 5-34 HiS, dt=-05 fRtS
.27 93
T n
3.8
DSR2CT ENTRY
Aran vlowing "To <m #
SUSCATC 3
pEp�tiC= .00 CFS 12.01 HfZ5, OLL3 = 14 AF
SCS TR-20 3+3$TH0D
A R S T7P$ III 24-DOUR
.29 98 pavement INFALL� 6 .4O III!
SPAN= 5-30 HRs, d =. 5 fit$
2 .3
DIRECT CRY
4
Area p-1cming To CB #6
StmCA.Z
PgAi[= 2 .05 CPS 12.01 HRs, VOE,iSiS= 15 AF
_ A R s it TYPE III 24-HOUR
3 98 i'av merit RT.INFALI1= 6 .40 IN
Spmi s-30 ARS, dt=•05 ARS
rn'
M
'DIRECT glTRY
PagiE 9
Data for Bake 'A` Joy . Developed
TYPE I . UR RAINFALL- a,4 �loo S 14 Apr 99
prepared §y Thong s. Nave Asp cis es. Inc. . mom£ie , MA
n1] ]11!1jjj -
sUBcATCMCM s �ea ,sawing To POnd l
PEAK, 2.02 CFS s 12 .02 HR§, V_IME- . AF
I§
SCS TR-20 METR D
kX R � Typt III 24.E UR
.30 98 F-o£ RAINFALL, E.ao IN
SpM, 5-30 HRS. -.05 HRs
2 .9
DIRECT CRY
�
D a f Bak- §' y - ,o Developed
P e la
Typs I 24-UCUR RA-JM7AL&. 6 .40 IN (100 Yr Stc= !& Apr 99
prepared b7 Thcmds S. Keve Associates, Inc. , Topsfield, MA
5UBCATCM9= 11 Area p #1mgTo CE
2F.AK_ 3 ,63 CFS G I1.§9 UR§, VOLUME= .24: £F
SCS TR-20 MErHOID
kCRES CH e TyfE. III 24-
.3 5 ga 98 0 ment good, £l C RA2 rA IN6.40
. §
RRS
& o , Good, S 1 c - 5.30 . «t=.Gs
.56 89
.a
. .a
TR.55SHEsT FLOW
Smooth Sul�es Loll �Is •! .1 i -.D\ '/` ,2
sNALLCM C CMMATIM/UPS FLUK 7� .§1 !
Unpaved =16 .1345 a�0' s•. ' /" ----------
Total Lailgth- 125 £t Total f 1.0
Date, for Bake N' 1137 - 203t Deval*ped
Page 11
TYPE x1Y 24-HOUR RAINFALL- 6.40 ju (100 7Cr Storm ir 14 Apr 99
Pzepared by Thomas E. Ne-ve Associates, Inc. , Tops£ield, MA p
RRAC8 CR3 to CB4
Qin s 3 ,17 CFS 9 12.QI HkS, VOLx � 22 AF
Qout- 2.14 LDS Q 12.00 HRS, VOLLTME= .22 AF, AfrrLN= 32%. LAC= { .0 MIN
DEpTH END AREA DISCH E'TOR-3NC�+F'RAL+15 METHOD120 PIPE
.0 . 0 .4 0.00 Pi3AK DEPTH- 1.00 FT
1 0.0 .04 nw .015 PEAK VELOCITY- 3 .1 FPS
.2 ,1 .19 LENGTH. 58 FT 'TRAVEL, TIME - .3 MIN
.3 .2 .42 SLOPE. .0048 FT/FT SPAN= 5-30 FIRS, dt=.05 HRS
.7 .6 1 .79
.S n7 2.051
9 .7 2 .28
9 .8 2 ,30
1.0 .8 2.28
1.0 B 2.14
REACH 2 CS4 to CBS
Q3I1 � 3.84 CFS @ 12. 03 ERS, VOLUME= .34 AF
Qaut= L.93 cFS 0 11.95 HRS, VOLUME- .34 AF, ATTEN= 50 , LAG¢ .o C1I
DEPTIJ END AREA DISCH STOR-3ND+TRANS METHOD
T F 12" PIPE
0.0 'PEAKDEP'I'Hr. 1.00 FT0.0 0 .00
1 0. .00 n� .015 PRAK VELOCITY- 2 .8 FPS
TRAVEL, TIME - .3 MTN
.Z .L . .17 LRNG'TKi 44 FT SFAS= 5-30 HRS, dt=.05 HRS
3 .2 .39 SLOPE. .0039 PT/FT
7 .6 1.61
.8 .7 1.86
.9 .7 2.06
y9 ,8 2.07
L.0 .8 2.06
1 .0 ,8 1.93
ACH 3 /� } Y
CBS tx /}
oxCS6
iQin w 3 .93 CFS @ 12.01 HRS, kJwmE= .49 A
goat= 1.75 CFS 0 11_80 FIRS. VOLTJME� .45 AF, A'T'I`�N= 6 , LAG- 0 .0 MIN
IigpTH E3M AREA DISCH STOP.-IND+ NS p+lETHGD
{FT)... (SG-FTCOFS1 12" IF PEAK DEBZ'ki- 1 .00 FT
0.0 0.0 0.00
.I �.Q .04 n® .U15 FEAIC VELOCiTY- 2 .5 F°
.2 y1 .15 L,ENGTEw 56 FT TRAVEL TIME .4 MIN
.3 .2 .34 SLOPE. .0032 FT/FT Sp,} = 5-30 HRS, dt�.05 NRS
.7 .6 1,46
.S .7 1.71
.9 7 1.66
.9 .a 1. 86
1.Q 8 1.86
1.0 a 1,175
Dar-a for Sake N' Joy - Post Developed Page 12
TYPE 111 24-801M RAINFALL-, 6.40 IN {100 Yr $fora►
prepared by 'Thomas E. Nevo Associates, Inc., Topsfield, W. 14 ,Apr 99
M'
RRACR 4 CB6 to Dmul
pin = 3 .90 CFS @ 12.01 €RS, VOLU � 64 AF
ut- L.86 CFS 4a 13 .90 HRS, VOLUME= .G4 AF, A'iT w 51 , = 1I3 .4 MIN
DEPTH END AREA 3DIS i
12� FIPE S' OR-IN�]+TRANS METHOD
-ISO-FT) (CF910.0 0.0 .00 PEAK DEPTH= 1.00 FT
04 n= .015 PEAK VHI,OiTYp 2 .6 APE
.L .L6 E�ENGTH= 78 FT TRAV TIME .5 MIN
.3 3S LOPE- .0 34 FT/FT SPAN= 5-30 S, dt=.OS HRS
.7 .6 1.51
8 .7 1 .76
.9 .7 L.9
.9
I.D .a 1.9
REACR 5 D 1 to Flared End (Pond 1)
pin = 1.85 CFS � 33 .90 RRS, VOLUME= .64 AF
pout- L.BS CFS 13.90 ER , VOLUME- .64 AV, A`ETEN- 0%, = 0J) MTN
DEPTH END AREA DISCH
1CF9 ISM PIPE S`F4Ft-II *FRAEIS METHOD
mm .0 4. .00 pEAK DEPTH= .6 5 FT
1 1 07 i3= .01S PEAK VE�LOCITY� 2,9 FPS
.3 . 9 LENGTH= 29 Ft TRAVEL TIME .2 MIN
4 .3 .66 SLOPE* .0036 FT/FT SPAN 5-30 HRS, d =.05 HRS
1.L 1,2 3 .58
1.2 1.2 3.61
1. 1.2 3 .58
l.3 1.2 3.36
§c 13
Data £o£ sake ■• 61 7 . pogt Developed
TYPE III 24-s UR RAMS- 6.40I2 (100yr8torM 14 Apr99
prap�ed by T maa a. Rc &sue cis c. . !id.
£ �
=g ,ortaJ-ng Ar"a
Pam l
gin _ S .90 CFS m 1-2,04 HRS. VOttME= .53 &z § MIN
ut= 5 .70 CFS @ 1. .gs HRS. votUME-
.91 ter.
STOIZ-IND METHOD 03 kf
ELEVATION �.sTOR p� SfopAGE =
2F,Ay BLMT10N= 249,3 FT
L n .on S aEVA §- 250 ,0 L
2
250.0 '04 SrjaT aLUVA N- 24a .0 FT
SpAN, 5-30 NRS. dt=-05 HRS
` . rdet, 23 .4 MIN .91 AF)
k
1 2 , RECTANGULAR ?M
)=c 1.5 c=3 .29+.4 E/1 t= g -; ( .I ]
:. `Lk!�o
T l
f XNE
ASS
.
O.aserva_tian Ccmmissian
Rio pndove
120 Main s set 01845
X,,rtbLAndover,
ne 4Z-64? p oposaL
Re; ree Addit
sakes Jc
3 �� illow S�xs�t �dot
oxtb- Andover ��xsir�essar3
e_s: O m�uissian di-rec-.ed
Dear am i.ssiart Memo '" 1 3 , e a effa s of
of ,Tar�usry ' to mitatc
krl o hearing rovidcd adtacsnt wet snd
At the �- detentiax� to be F routing
.� worts- ��p�r��o�s sur£acns ��� ��is b
site scoff fromropsad cses tcscm wiio:i presently'
i�tcresed eve Assct~iates Prod of catch basins t and
s stem of the fci . ' a
resource areas. loft into e ' a west side to pvide
aid- additi.anal �aadinq) areas on th s s}s� weir outlet
the pavea ( of thisresteci
drains the outlet with a sharp
1�od1 y2I1 52 3�1 t l n OiIC
detention/ ,� -ropased psnd
st untu e. than. a
to demcnsLrte stcr eventi-
th st T i tad alclal-anon�ate� �o� a IGO year
�.�. cui2ic feet per
wiaY�ae ,-e feet of arevtf .ow gate rate for
will store � . O�ion cf 49 •� feet and c�rttiition ���w des i.g�x
the eis'C Ong a the same
eaiiv phis rate is Tess t}xan feet per seccx�d
sec storm of- 7 . cubic
e -10() year edimentatLan
ant, t'rirg and d r,�i1i also
pr�v3det��t� catch�en�ral that �.t servss.
e pr�gased pon cf Erma the to
for tie e isting r
Vary t'Culy yo=s 1
p, 80CTA+ s r C.
OMAS
Thomas .. 14eve, PE' p�S
pr-es ident
JB/kmerring
CC=
B >-3n o tes r Stahima:n n �n a �*.IM use PLANNER
Rote I FAX 1508) a
Page I
Data for BAKE---JOY EXIST, CONDITIONS 25 Jazz 93
Prepared iO S I IE ASSOCSI S INC. , `i`OPSrIELL, -
HydroCAD 3 . 4 C} Q1 c 985� 9 Ag e fi o a �xte vstem
WATERSHED ROTITING
DESIGN POINT #1
0 SUBCATCHMENT REACH
DrESIGN POINT
Page 2
Data for HARE-N-JOY EXI.S. _.4G CCNIDITIONSI C. , TOPSFIELD� XA. 25 Jan 93
Prepared b T ONAS E. NEVE ASSOCIATES,
d aC D 00 40 C 98 -1 92 A e[ 7 c ocot alter Svst s
{ oa `CZAR
SUSCATCHMENT 1 AREA FLO NG TO O-E• #1
P�CRZI- SCS Tpt-20 KE HOID
,12 98 PAVEXE TYPE 7-11 2 4-11OU
. 15 7 OPEN S,2ACE, GOOD, SOIL C RAI F'AL_L= 7 .0 1
.27 S pFAI � 1.5 CF5 q 12 -00 HRS
V'OL�s = -10 AF
'L`C �lri
.eth-A Comment 3 . 7
CURS DER (LAG) -Zlluu
L-1 51 ST. 036
SIB 'EC EI AREA VLOVING TO C.B- �4
AC E , �T3+3 ' `
CN SCS T -2Q METHOD
5 38 P TYPE ITY 24-HOUR
RAjNf-XLL-- 7 . 0 IN
P ARmm 1 . CFS @ 11.99 HRS
VQL = . 07' AF
Tc mini
Meth--"
2 .0
CURVE NMO R {LAG] a= OD
L-7—Izo
g CA c N' A A rLGV INN To C.B. S
ACRES CN CS TR•-20 METHOD
. 19 9 PAVEI TYPE !IT- 24-HOUR
RAT- FALL= 7 . 0 IN
PEAi{= 1.3 CFS@ 1 .9 9
HRS
VOLUME= . 09 AF
}
T 7ll x
Method Comment 2. 0
CURVE NUMBER (LAG) MEfiD
L=104 s=.014 f '
BT BOA' `Lffi 4 AREA pLCWIN ` O DE EG POINT Ol
ACRES e SCS ` -20 METHOD
.29 98 PA EIV-N ' TYPE ITT 24-DOUR
. 3 74 OPE'� SPA T GOOD, SO IL RAT- FALL-^ 7 . 0 IN
as per= 3 .7 CES 9 12 . 02 �U
VOLUME= . 25 AF
TC (1r,_
;1d CCll1 ?lt 4 .
CUR 'NU ER (LAG) METHO#J
Oata {d= BAKE-K-JOY EIISTI.\ c0NnT-T 3XS 25 Jan 93
?=e2a£es by 2Z0 34\l / \\ \ }\g\ \ INC. , \\f/\ccmhut�r Systems
R7aroc O ] , O 000
§unclkTCM,CEN�T 5 AR.EA 'FLOWING TO REACH §
eeF2 §ES 22-2025Oo
.48 74 o2E£ 32k , GOOD. SOILc
TYPE III 24-HOUR
RAINFALL 7 .0 IN
PEAK= 2,3 CFS @ �11. 99 �5
7O£mm= 3-5 AF
_ O =in
metto4
c2p.vru NUMBxR (LAG) XBT20�
Li---75 I37 �/
Data for BA -W-J OQY EXIST' CONDITIONS Page 0-
PrepiA red by THOMAS E. NEVI- ASSOCIATES , INC. , TOPSFIELL" NA. 25 ,fan 93
HvdroCA 3 . 02 000401 c 198 crocom uter Svst8ms
REAcH 1 C.B. #3 TD C.D. #4
UEPTH END AREA DISCH
(FT) (SO-FT) {OzS� 121, PIPE STDR-IND METHOD
0.0 0.0 0.0 MAX. DEP H= . 65 FT
.1 0 .0 0.0 rs= .015 ?= VELOCITI= 3 . 0 FPS
.2 LENGTH= 59 FT 'RAVES T21�sE = .3 MTN
.3 .4 SLOPE= .0047 FT/FT 1.6 CrS 1 t00 HRS
.7 5 .1.8 QC)ilt= 1.6 CF S 12. 00 II S
.8 }7 2f1 ATTEN= 2 LAG= . 3 MIN
.9 -7 2.3 I /OUT= . 10
}8 .3
Lt0 2.3
1.0 2-1
RELR 2 C..B.. #4 TO C.B. ' 5
DEPTH END ARIA- DISCH
F *`i" G `S I211 PIPE STOR-I D METHOD
0 . 0 -0 0. 0 MAX. DEPTH= 1. 00 FT
0 . 0 0.0 n= . G1.5 PEAK VELOCITY= . 7 FPS
.2 . 3 2 LENGTH= 44 FT TRAVEL TIME = . 3 MIN
3 . 2 _ SLOPE . 0039 FT/FT Q n = .& OFS 12 . 00 HRH
. 7 1. 6 Qout= 2 . 0 CFS C 12 . 05 HR
ATTEX= 26 LAG= 3 . 1 MiN
AF
. .7- 2.1 IN/0-UT- ..17 . 17
.] ..8 2 . 1
1. 0 .S 2..1
RE3LCH 3 G.B.- #5 TO D.H.H. #I(NCT O n)
DEPTH END AREA DIH
(FT1 (Sp---FT)-. (CFS 1211 PIPE STO II I? I-fETkIOI?
0.0 0. 0 0.0 MAX. DEPTH= 1.00 `
. 1 0 . 0 0 . 0 n= . 015 PFAK VELOCITY= 2 .5 FPS
.2 . 1 . 2 LE�r== 13 0 F T T1�.� EIr T _ . 9 m I?�
. 3 . 3 SLOPE'= . 0032 FT FT Qin = 3 . 2 OPS 12 . 00 i3R5
.7 . 6 1. Qout= 1.. 7 F S L 11.9 0 HRS
.8 . 7 1-.7ATTEN= 46 LAiS 0 . 0 MIN
.7 IN/CUT= AF
.9 1.. 9
-1. 0 1.9
1.0 .8 1.7
�y �} ��A'1 yy'�� ��II��yyTT��++ CONDITIONS y'y�T�1 'Page }� y
].fit Vr 1JA E- -.TO EX1 ST' --u 4VLY 1.I�l�V1l L7 fi� ��i+ �.}
r 3 red H MAS E. NEVE ASSOCIATES, INC. , FOPSFIELDr M .
M CR 3 . 02 00040 C 986�199 A n sc I ro am uter SvsteTRs
RrACH �
DEUTH END ARE. DISC STGR-IND METHOD
FT S -FT CF 1 i� PIPE MAX. DE PTH� . 63 FT
0.0 o .0 0.0 pEA ELOCITY= .8 FPS
-L .1 .1 _015 TRAVEL TIME .9 MIN
_3 .3 1 gG'IH- 156 FT 1.7 CES 1L,'3E7 S
.4 .3 .7 SLOPE= .0036 FT/FT Qout= 1.8 CFS @ 12 . 00 F S
.9 .9 2.8 ATT£N' 0 .G= 6 . 0 MIX
1.0 L.I 3 .3 T{ OUT= .26 6 AF
1. 1 1,2 3 . 5
L.2 1.2 3 .6
l.,2 1.2 3 . 6
1.3 1t2 3 .4
SIB
DEPTH MLt AREA DISC F 3 f CH, EL -iN fE'�HOD 43 FT
F 5 �F'i' OFS 0 f r , MAX. DEPTH-
Q.. 0 -0 0 . SIDE LOFE= .1 PEAK VELOCITY= �.. � FPS
0. . 0 0 . 0 n= .0 3 'TRAVEL I�SE = 5 . 6 +SII�d
0 . 0 0 .0 XGTH� 3 5 5 �' Q in = 3 OF S 3 . 9 9 S
y 0 .0 SLOPE= . 0056 FT/FTot�t� 1. 8 OFS @ 12 . 05 IRS
. .1 ATTEI = 2 3 1 LP G= 3 _ 8 MIN
. 15
1.2 . 3 - III/OUT= ..
..9
' 2a7G a
Data fo= BAKE-K-JOY EXIST. & cO I2I0 2 202SFI£Lu, MA. 25 Ja2 93
Prepared by THOMAS 2, § 2 ASSOCIATES ,
\\/ }\ \ &2\I\e\ Nil" 11 =ter §vstems
§ dria 3 . 0 000401 c
DESIGN POINT «!
STARTING ZLE7- 0 . 0 £2 §ot @Scfibe4
FLOOD ZIZV- 0 .0 7
IT - METHOD
ELEVATION I=,SIOZ PEAX 2LEVATION= O .O 22
7 II pEAK STORAGE = O -On A2
Q{a = 7.2 CFS @ 12 . 02 HRS
Qout� 7.2 C£S @ 12 .02 HRS
ATTEN= n % LAG= 0 .0 mil-4
I2/OOT= -§5 / -65 AF
M £ o ? Ic25
?O� I3 G 78 Ft 7A2I0§
0 , o n .o O, 0
QQ 0 . 0 0 . 0 0 . 0 n . g 0 .0 0 .0
FEET
pace 7 �
Data for BARE --N-TOY PROI�OE : CONDITIONS��3�. , TOE FI ��, 7 Marx 93
p.repased by THOMAS E_ NEVE ASSOCIATES ,
-
H d aO � . 0 0 0� c 386-199 A lied fic m u ear r ems
I3 € (D
[4]
DESIGN
POINT #1
SUBCATCHRENT REACH �POND
DESiGN POINT
Data for BAP E-N-1OY FRCPC` CONDITIONS Page 8
Prepa�E�c1 by THOMAS E. NEV, ASSOCIATES, INC. , 'TCIPSFIEL. : MA. 27 Jars 93
HvdroCAD 3 . 02 00040 986 -1992 lied Mic ocotl uter Svstems
5<nc srtcaRr-
SUHCATCHMENT L AREA FLOWINr. To C.B. #3
ACRES COY
_25 98 'PAVE3'FENT SCS T -�� METHOD
. 1S 74 OPEN SPACE, GOOD, SOIL C TYPE III �-�CL�R
�3 88 RAINFALL- 7 .0 IN
PEAK= 2.7 CFS 12. 00 HRE
VOLE= . 17 AF
ethad Comment 'Ti-- nir
CURV NII 0'9R (LAG) HEMD `5
L=IS 5
SUBCATCHRE14T 2 AREA FLOWING TO -C.B. #4
ACRES ..... ....._CIF
.21 9S PAVEMENT
SCS - METHOD
o
. 0 74 GOOD, SOIL 'TYPE III �-ii0i?�
QpU SPACE,
. 3 RAINFALL- 7 . 0 ZIT PEAK- 1. 3 CFS 12 . 00 HRS
VQLM4-E= . 12 AF
Mat od
Co er1 T min
CURETS NUMBER (FLAG) METNCD 3 . 8
SUBCATCIMENT 3 A SA FLOWING TO C.R. #S
ACR
9 PAV ENT SCS T -20 METHOD
TYPE III 2 4-HOU
RAINFALL-- 7 ..0 IN
PEAK= 2. 0 CFS 4 11-99 HRS
VOLE= . 13 AF
lil
NeLod comment Tc '
C[ RV NUMBER (LAG) RETH010 .3
L--140f S=. 19 f f
SUSCA'TCHMNT 4 AREA FLOWING TO PROPOSED C.S.
CRE S CIS
. 30 9 8 PAST SCS TR-2 0 METHOD
TYPE III 4-HOUR
R INFALL= 7. 0 IN
PEAK 2. 1 CFS @ II. 99 HR5
VOLE= .13 AF
: et ad comment _ Tc (min)
CURVE HUXBER (LAG) METHOD •S
L--l45'
ri-
Data /\= BAKE-s-J07 PRO PC I CONDITIONS page §
�c. � �O�SfI2� . : �. 27 Jan g]
@re2a=4a by ISO�S E. NEV,- ASSOCIATES , I
] droCAD 3 . 02 000401 c 1986-19 2 k Lied @ic occl ute ¥stems
SoBCATCmiENT 5 AREA FLOW-1 XO TO D.M.H. #l (FRO£ ROof QP.AI#1
ACRES c9
,30 g§ 200� GCS 72-20 �TEOO
IypE III 24-HOUR
nI§£ALL= 7 .0 IN
2 , { c£S § 12 .00 HR3
VOL== . 13 AF
K@tEod Ecl'iment c- "
c2RVE bMMBER <LAGI METHOD 2.9
ZOO/ 8=_021
§mac& c S AREA FLOWING TO -DESIGN PO� ¥I
E5 C
,12 98 PAVEMENT 2c5 ma-20ECO
, a0 74 O2£§ SPACE, GOOD, SOIL c I2 III 24-EOM
. 42 St RAINFALL--- 7 ..0 IN
p2A£= 2 . 1 c£S @ 12 . 03 HRS
VOLE= . 3-5 AF
co @=t c mia
Method
. g
CURVE NUXZaR (LAG) HET■oD
LT--360 S=.058 / �
Data fcr SAKE-N-.7Oy pRop - n CONDITIONS P t e 10
Pro }pared by THOMAS E. NEV_. ASSOCIATES, INC. , TOPSFIEL 7 Jan 93
ivc oC D 3 . 02 2 A plied icrccam tee _yrj ems
AOa I C.B. #3 TO C.S. J4
DEPTH FIND AREA DISCH
_�',+ -FT) C�'S 11' PIPE STOR-.i�f3 �`T�f-iQ�
MAX- DEPTH= 1-00 FT
1 n= . 015 FEAR VEI,QCITy= 3 . 1 FPS
0 .0 0.0
t2 14
. 1 .2 I TI = 9 TRAVEL TIME - .3 M1
.3 .� I�PE� .OQ47 FT/FTQiri = 2.7 CPS @ 1 .E]Q HAS
1.8 {�out- 2 .3 cF S @ I2 .0 5 EIS
,7 . 6 8 .7 .8 ATTEN-- I8 LAG- 3 . 3 MZN
.8
.7 3 .3 IN/o = .17 , L7 AF
.9 .S .3
1.0 . S 2.3
1.Q .A ..L
REACH C.B. 4 `lea C.B. 45
DEPTH END AREA DI CH
_ kl s - ` ' .. SZ" FIP "IOR-Y? D METHOD
0 , . 0 MAX. DEPTH= 1. 00 FT
0.. 1 (3 . 0 010 n-- . 015 PEAK VELOCITY= 2 . 8 FPS
. 1 LENGTH- 44 FT TRAVEL TINE = .� MIN
..2 .4 SHAPE= 39 F'I` IT Qin - 3 . 9 CFS @ 12 . 02 FIRS
Qout= 1.9 CFS �
� 11. 0 HISS
_ 6
. 8 . 7 ..5 ATTEN= 51 LAC= 0. 0 MIN
, 3 .. 9 AF
.7
. 9 ..8 2 .1
1.D . S 2. 1
1. 0 .8 1.9
REACA 3 C.S.- 45 TO PROPOSED C.S.
DEPTH EUD AREA DISCH S I'OR-fND -METHOD-METHOD{ -FT (CFS 1 " PIPE
0 . 0 0 . 0 MAX. DEPTH= 1. 00 FT
. 1 0. 0 0.0 n-- .015
PEAK ELC2 = 2. FPS
. 1 .2 L.EI�FG`'ii- F TRAVEL ICE = . 4 MIN
. 2 .3 L0pE3 . 003 FT/F ' Qim 3 .9 CFS @ 11. 99 HRS
.7 Qo xt= 1. 9 CFS 11.73 i B
. 8 .7 1.7 ATTF-N= 5 % FLAG= 0 - 0 MIN
.9 III/CUT= .4 . 42 A
. 9 , S 1.9
1. 0 .8. 1.9
L.0 .S 1.7
Dat2L edr aA -N-JCY PROPOQ !D CONDITIONS Pag4a 111
Prepared by TUOMAS E. NEN ASSOCIATES , -ZNC. ,- TOPSFIE, MA- 27 Jan 93
Hvdr6OA,D 3 . 02 000 4 c 1986- 992 A iolied M' c-rococo uter Svstems
REACH 4 pRopoSED C.H. To D,M,H. #1
DEPTH END AREA u1scli
(F` ) (SO-F"I)....._ (CFS) 12" PIPE STOR-IND METHOD FT
0 .0 0 . 0 0.0 MAX. DEPTH= 1.00
- 1 0 .0 0,0 ri= . 015 PEAK VELOCITY= 2. 6 FPS
. 2 . 1 . 2 LENGT = 70 FT TRAVEL `I°� = . 4 3iIS
.3 _ .4 SrAPE= .0034 FT FT oin = 3 . 8 O£S @ 11. 99 FIRS
t 7 .G L.5 Qout= 1_8 CFS 11.70 IRS
.3 .7 1.8 AT'i`EN= 5 3 LAC= 0 . 0 Misr
.9 .7 1. 9 I OUT= _55 . 55 AF
.9 . 8 1.9
1.0 .8 1.9
1. 0 .$ 1. 9
RMACK 5 D.M.H. #1 TO POND #1
DEPTH END AREA DISCH
CPT S -FT CFS rt 5" PIPE STOR-IND TROD
0 . 0 0. 0 0_0 MA . DEPTH= 1. �5 FT
C
. 1 . 1 . 1 n-- . 015 P£AX VELOCITY= 3 . 1 FPS
. 3 t . 3 J�E GT = 42 FL' TRAVEL TIME = MIN
, 4 . 3 .7 S PE= .0036 FT T Qzx� = 3 ,9 CFS 1 . 0 IRS
.9 . 9 2 .8 Qout= 3 . 6 CFS C 1 . 06 HRS
. 0 1, Z AT' EN= 8 % LAG= 4 . 0 MIN
1. 1 3 .5 YT3 = 9 . 69 AF
1..2 1-2 3 . 6
1.3 1. 2 3 .4
13ata for HAKE- -,SOY PRCPC CONDITIONS Page 12
2repared by `I'HOMAS F. NEV, ASSOCIATES, INC. , TOPS FjRL- , : MA. 27 Jan 91
FVdi7,oCAD 3 . 02 000401 c 98 -. 92 A 1 ' ed Microca tit syst�ms
POND 1 PRoPOSED RETENTION PCWD
STARTING FLRV= 248 .0 FT
FLOOD ELEV= 250.0 FT
EL TATION CUM.STO STOR-IND ME'IHOO
(FT.) (All PF.A. EUVATION= 249 . 3 FT
248 _0 0 . 00 PET STORAGE = .03 AE
250.0 .44 girt = 5.5 CFS @ 12. 04 HRS
Qaut= 5 . 6 CFS 9 12 _0 6 EARS
ATTEN= 0 LAGS 1_ 0 mz
I OUT= .84 . 82 AF
uNVERT F OUTLET DEVICES
49 .0 10 ' sEARP-CRESTED RECTANGULAR WEIR
TOT DISC GE vs E VAT-10
`EE'I . �7 . 2 3 , 4 . 5 . 7 . S . 9
48 . 0 0 . 0 0. 0 0 . 0 0 . 0 0 . 0 0 . 0 0 . 0 0 . 0 0 . 0. 0
' 249 . 0 0 . 0 1.0 3 . 0 5 . 5 8 . 6 12. 1 16 . 1 20. 5 5. 3 30 . 4
350. 0 36 . 0
I
DESIGN POINT #1
STARTING ET T 0.0 FT Not describe
FLOOD E sEV= 0 . 0 FT
ELEVATION CUM. STOIC � METHOD
(FT) f AF PEAK ELEVATION= 0 . 0 FT
PEAS{ STORAGE - 0 . 00 AF
Q$zr 5 . 6 CyS @ 12 . 06 HR5
Qo'at- 5. 6 Cr S @ 12 . 08 HR
ATTEN= 0 LAG= 0 . 0 MIN
TNVE' FT OUTLET DEVTCES
TOTAL DISCH RGE� vs ELEVATION
FEET 0 . 0 O. Q 0 . 0 Q. 0 0 ' o 0 . 0 0 . 0 G.
'+ TORS) Page 72
1 Data far LINKS INTO CENT. C1LT. POND { ]OQYR �
Prepared by THE}t1fhS E. EUE ASSOCIATES , INC. TOP5FI1=La , MASS 3�N0�89
Hycir-o A rev. 127!89 (c # 19913 App.lied ,Micrg=nj2 ter Sy st ms
l
PQNG I to I
POND i CENTRRL POND IN EXISTING BVS. PARK
STARTING ELEU- '133.8 FT
FLQQ0 ELEV- 239. 1 FT
STOR-1 0 METHOD
ELEVATION CIaM.STOR PEAK ELE A T ION= 236 .3 - FT
(r T } t f�F) PEAX STORRGE 34,24 AF
2-33.8 0.00 gin = 469.3 CF5 @ 1Z.00 Hf25
234.0 1 .26 Qout- 6,7 OF5 @ Z0.00 HR5
?3E .0 29. kZ R TEN- 55 % LAGS 479. 9 Mj_
237.0 4S.iu IN/OUT- 38 .S7 ! 4.32 AF
238 .0 55,6E
240.E 1Z4.98
INVERT (FT) 0 TLET QICLITrEr. .
x 1 ' ORIFICE
O}= 6 Width 2/3 SQR(ZQ ) ( H"# .S
Z36 .8 4 .6t SHARP-CRESTED WEIR
Itox L H" 1 ,5 I1; .Z7+.4 jj1 2.3 L-Length-2( . 1 H )
Lim 235.B .5 SHARP-CRESTED WEIR
QiC L ki" C�3.27+.4 HIZ.3 L-Length-2 H)
TOT DISCHARE v ATIOM
FEET 0
put # 4
33.8 i 0.0 . � .3 E � . � 1 .5 i2
5 5�5 G.7
2A.8 t .Z 3.6 3.9 4.2 4.5 4.9 5.0
S.3 B ,4 5.a 6.8 7.0 7. 1 7.3 7.4
Z3 . 8 6.3 5. 1
Z36.9 t 7.6 8. 1 8.8 9.6 10.f 1 ,5 12,8 14. �5.3 5.2
23 .8 ! 17
33,s� t 3Z.7 '�4,7 35. 5 37.Z 36. 40.0 41 ,4 42.8 44.2 4S.E
239.8 1 46.7 48.0 49.2
poNz I DISCHRRGE
E:NTRRI- POND IN F-YISTING BIAS. PF;RK
239 :8 T _ - - - - -
288 , 0
239 . 3
fl
237 . 9 .
23S . 8 ST - _ $•. # . 9 ; SHARP- r1�5 i EIS ,WEIR
� 235 . 3
235 . 8
235 . 3
2 4 .13
�B4 . 3 � � � t
235 . Ec 0 q , rn O Yl m u3
T �. ry "d M. rh w �
1.ZCHRRGE (C t a- )
c,
TUK)AVIASE NE VE
ASSOCAUrEAS.". N(A
Jumtmo 8,, 1' 99
Heidi A. Griffinjown Planner
Islorth Andover Planning Board
27 Charles Street
Re: Muffin Realty '1"ruust/ also-n-fob° Co.
3 1 Willow Street, Site Plan Review
Dear Heidi:
Please accept the followwr i 1'"'PorLso to your,repurt of May 25thand C & C's report, of May ' l st-.
i) The locus map luappens to be from an older 1.)1ark Tl is actual Iyr I" 10,00' which was tlw.e,
scale of the Town ZoningMap, in years,past„ Since everyone scotmins to hav .located the
site we'd ap r oiat .a waiver on this one.
ii No cotvu,tnent
i i) No corninent
iv), No coinnient
v This, again is a limitation.the older as-built plan, The requirement of topography beyolwc;1
this property lines would sce m7 pertinent to au evaluation of the impact of hnprovt�m nts
and particularly storm rlraina c design on adjacent Properties. The project is desigiaed
such that all stor nv run-off is collected ar ml :romuted to the mlovolo nicnts stomrma drainage
system in Willow Street. Accordingly we request a waiver of this requirement.
wri 1 think we are now in a recmenut that the proposed number m:uf Paa- irn ,,sj)accs is correct„
No additional signs, are proposed.
ENGINEERS - - L SURVEYORS - LAND USE II LANNEFI
447 Old Boston Road U.S. Raute,#1 ToF::at ficl 1, MA 0,1983
Heidi A. Griffin, Town Planner Page 2
June S, 1999
vii)
1. Provisions for slormwaler management arc consistent with the engineering practices
which were accepted whea the site was developed in 1986. Water quantity
mitigation is accomplishreel by the construction of an outlet control strucWre ac i-os5
Willow Street fiom Jasmine Plaza whiob enables the central Red Maple Swamp to
Function as a detention pored. (HW Moore,Engineers 1993 &. report by this office
entitled "Definitive Subdivision Plan Notth Andovcr Business Park Extension
Willow Street South-Flagship DnvCdated Doccnibcr 1, 1989). later quality
management practices were not required at this lime but please note that after passing
under Willow Strut, all storm water negotiates a 250 ft. long vegetated s ale to the
central area.
I
. 1n 1994 a 13,000 SF freezer addition was constructed. As part of this work a gas & of i
trap and a sediinentatiorJgi-ouT cdwater recharge pond were introduced into the stoma
drainage s soma serving the-rear �;ubealchmont.
3, The current proposal will not create any net increase in the mate of storin ater 1'lmoff
a explained is our letter to dated A nil 19, 199 We propose to add gas and
oil traps to the ;B's in the front subcatchxnent, Our pmitionis that additional water
quality manageinent practices (pond) to treat the proposed parking expansio-n are not
ustified by the small size of the area, the probability that runcff at this point will not
leave the site, and also by the fact that the Board has indicated a willinguess to
condition this work as future only if a ieeded, A pond at this location would also
eliminate existing mature landscaping.
viiiiNe comment.
ix) No comment.
x) Balce-n-Joy appreciates the Board's willingness to give the fi-ont pal-king c d6ves the
status of future ifneecied,
xi) A Notice of hitent was filed with the N.&C:, , on June 4th. We have added an erosion
control plan, fire hydrant, and appropriate details to the. set,
xii) New Signs are not proposed
xiii)No comn-Itixt,
xiv)No comment.
Heidi A. Griffin, Town Planner Page 3
.lulic 8, 1999
xv) Additioual Landscaping is not proposed_ There are a pair of 1 " Maples located
approximately along the proposed boulder wal1. The company would save these trees iI'
at all Possible aria stonc tree wells e(c.
xvi)The facility is e-quipf ed with a trash conipactoi-, the location of which has been added to
tilt plaf15.
xvii)The exterior fighting for the addition bas bcen reduced to a}pair o1'floodlitcs adjusted to a
full box down]ite position loweved to 15 r above first floor and locate above the loading
docks anti at the S W corder, These fjxtares would have I 00w metal halide balbs as per
existing building mounted lites. There would also be a "jar" lite or silxnihir fixture to ligbt
the exit door flisQbarge as required by the Buildilag Code.
xix)Wte agrcc that a Traffic Study is not appropriate.
xx) Dui' office is not aware of any aspects af`the proiect which would require filing plans with
Mate Agencies.
xxi)No comment.
xxii) We agee that a Fiscal Impact Study is not afpropriate.
XX iii) Igo continent.
Screening &. Landscaping.
The, fvont parking area conforms to the Town regulations that wt, in o1`f'cct at the time of its
-io changes along those tinlcs are proposed.
construction. Aocoriilgly s
With regard to C & C's report dated May 21s( please be advised of the following,
1) The 100 yea` 11ood elevation was calculated by H M. Moorc Engines is in 1983 to
he at appi-ox elev. 236' oon(our in the central area of thte}urge. N eve Associates expanded
this study in 1989 (see item vii) and confirmed this calculation. As such the Flood Plain
is over 50' cast of the site behind the Eastprint facility, (See attache)
2) See item x]i}
3) See 2tem x)
4) See item i)
14cidi A, Ciliffin, Town P1amier Page 4
Jude 8, 19
) See item vii)
A. Rip-tali dotail at the swaie hws been added to the, plans.
b See item xi)
7) Outdoor retail is i-iot proposed,
) See iWm xv
9) See ]tern xix)
10) See item xxii)
11) See item xxiii)
1 ) See Scri cniug & Landscaping
13) See Screening & Lan&taping.
Thank you for your consideration.
Sillcerely,
THOMAS E. NEVE ASSOCIATES, INC:,
Jim Bourgeois,
Project Coordivalor
JB/jp
0C Jolui C. k�essia, P.E. C. &
Robert Ogan, Bake-n-Joy
Paul DePew, Bake-n-Joy
Brian Jories, Rivermoor Engineeriq
i zt7ah.
NATIONAL FLODD INSURANCE PROGRAM
' NATIONAL FLOOD kliURWf PROGRAM
FIRM
'. FIRM
FLOOR INSURANCE RATE MAP FLOOD INSURANCE RATS MAP
TOWN OF
NORTH ANDOVER, TOWN OF
MASSACHUSETTS
NORTH AND OVER,
SSEX COUNTY MASSACHUSETTS
} ESSEX COUNTY
c
PANEL 6 OF 15 PANEL F5
ySUE MAP IMDFX FOR PANULS NOT PStNTED)
ISLE MAP INDFx FOR PAf+}Fi.$ MOT PFt4N�FC71
F
tf
3
PANEL LOCATLON
COMMUNITY-PANEL. NUMBER PANEL LOCATION
250098 0006 C
COMMUNITY-PANEL NUMBER
250098 0008 C
MAP REVISED:
JUNE 2, 1993 M MAP REVISED:
4
federal Emergency MansgeinenI Agency
Federal Emergency Mannement Agency
--
SPECIAL l'LOOiI i-IAZ.ARD AREAAS IN41NDATED
4Y IOU-YEAR FE001_]
ZONEA Nobaw0� 1zvlrlevaii3nsdctrrmirwd.
a IOR3 l't4'r rriu,e -
ZDNE AI-r Flood dcgLha of t lax 3 fees (usual? amps ui
;k�ndingl;baw♦3u+a[9 rSL.wations deterradnr+i.
ZONE Ap Flood&pill%Ui t 50 3 feet JUSUFJly shcw�l flaw
ors sloping trrr th5); average depLhs Jc-ier•
ZONE X rained. For am.D% of alluvial Ian !loading;
vela des dli6 dcKrrrnnSL.d
;!()NE A99 To be pfoRaearLF from 100-Yea: flood by
Fedef3l iloor�jim:r.rTion iVslem ur;du corL•
trruction; rya ba,� floEA elevations drtcr-
mirie.d.
ZI)Ni=V, Coastal !load with weloc[ty #5azatd (wave
anion);no base flOrA w3L.wations deLrrmincd,
ZC)hl£VE Coastal iluoLI wah welucity hazard 1wavr
xtion);base 11wil elwvadons&Iumincd.
FLOOD WAY AREAS IN ZONE AE
OTHER FLOOD AREAS
` ZONE X ✓~reds od SA q(w fJmd; areas al BOG yeas
tyaodwitha,+cragc'+k pr[Ls&lass[han1foalor
L Mth drainage arem lt-y6 tl1arF l $r wii?..a,alhr.;
arTd areas protected by Iawce-�Frum IW.yt'ar
fl1>od-
/ — F3MAREAS
+� 7-ONE }4 Arexsdetermincrltofx'4}Loside540-year;laod-
. rd.alrs.
JQNE f] Arras in W11 11 iloeid'hazz r i am uns.e er_
nllr:ed-
i,ND€VE LOPE L)COASTAL BARRIERS
- fJaodpldln I3Lnu,dar}'
i
�.. — f3Uoilw3y$OtrndaTy
7qn[•[]Bnunddry
Boundary Dividirij{ Special Flood 11;irnad
{rlsu:s,arsd [iouncra[y Nviding Arras of Dif,
f {Cr4fnl C{53tt3L Base F3cw L Efewaiions 1Vil#iin
Special Fh)Ud Hazard Zone's.
-- ,513� Elate f[nod ElcvaLion tk*: ErEvatiors in Fcc9`
Crc is Scmion Line
[EC 987) Rax Eland Elevation in lr:L.L Where Uniform
14Rhin Tune'
RM 7 Eleva;io s RckTtrwo Mark
CD • 1 5 Rivrr MILL.
'ROereared to the Nalionai Gecdetic Vrrtiul L}]LU;'n nr 1929
NOTES
ih,t map is for Labe In administering taw Natkumul F631,-d triurramce Program;R
c&3es not nc€cssaFiLy idengfy all areassubfrct to I ocxGrgS,oaraifulaaly from Ic�al
- ryif.kgc soul LC50 i�rall site,ur 3[1 v1drd[ncuic redtUZ eS W11I0C 5pti0e1 I-W�r
ftazdrefAreas.The comrriuri;Ly map rep-witorysh4)uldbeconurlted3orpossibhl
updaludfloodhazard information prior to use oft4k map for propertypurcfrasc
ne cnniia ucilon purposes.
C,omialbiteflr:adel(-vvlorisappl;yanLylandwafdoFO.QN iVD,andinclvrfeahe
effect of wave�[9-smr,Liit,.e e[evatiam iteay Aw Jiffrr yi6nifleantly fromilt i--
dnegap*d 23y 111C 11ativnal weather 4 .e for buirkanr cw'acuation plan[,is,g.
Arrays ofspefx3lhoodhaz,[d(IDO-"arf�oodL Indude lows A,AErAH.AO,A99,
Vr and VE.
Certaen areas not is,Special Rood Hazard Areas may I±e protectc;t by lZoo-d
control siru€tures-
[3o and.5[Lesatl i3Ta floodwayo were computei3 a1 cross sections a,(Nnierpolated
between cross wcclors-l;hcitfsodways were based onbydraLdiC4r-orislderai;vns
with rcgaid to w[ulfemcnis of the Fcdcral Emcrgcncy Marta8l:M61t Agenry.
OcKodfway widths iri some art-,"may be lac narrow to sfibw 10 scale-Floocfway
kd
vrsd;hs arc pro+AfEed 1rL i15o Flrmd fnsurdrKe Scudy Report.
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T1 K)A, ,,,)IA. s, j NEAT4'-,
ASSO,C_ I AT V 91NC&
Julie 17, 19,99
;% Heidi A., Griffin, Town Planner
27 Charles Street
Fie: Muffin Realty Truust ..Bake-n-.1 .Food 'JON 16 1 '
99
352 WillowStreet, Site Plan,Review
(�LANI In dt tEMI•.
Dear Heidi„
Please accept these rrnirner additions which i .have added to the plans. d will foliow up, with Rill. size
drawing by mail.
l, Dfive °any Excavation Sturdy, This, sketch has been added for the Conservation Conunission. It.
shows the eXisting underground utilities which dictate the location el' the proposed water lime. It.
should satisfy the owner and the Commission that the work can. be done with the driveway open and
without any adverse effect on adjacent a cent wetlands.
s.
. Rip-Rap 'lope Detail. C&C has ugaresfionned the sive of the grass swwrale that rnrrns along the west side
of the prop n used addition access driveway (Supplemental Engineering Rc:vciww June J! 1, 99 item .
TL"lue swwale grows fforn as lnrenrirtnately 2 Fr wide at the driveway, comer to approximately 4 F wide
1 1
at (liedrop inlet catch basin. It is �nr° nos to be 4 inches deep. We see- rno wranlaae in, perfornling
calcualaatu rrs to justify the size for the foltowing reasons:
t , it drains only the paved surl`aee and is gently sloped.
2. It: is not proposed to satisfy stenrmwater rrnaarnua ennernt regUirernerntsn It was introduced, into, the
design. solely trn prevent sterrnn runoff from routinely crossing, the proposed loading dock area
which can become au rrnaisa nee in certain seasorns, Should an extreme dorrn'r event exceed its
capabilities any water not ennteuin (lie drop inlet CB would simply find its way to, "B #3 over the
paved surd ee as would.have been dine case without the proposed strauetuure..
i rucer°el yr,
ASSOCIAXES,INC.
Jim Bourgeois, Project Coo)rranter
113/jp
Cc Jason Loiscfle, C&C
Bert Ogan &Paul DePewv, Bak.e-n.-Joy
Richelle 1'w'gamrtin, NAC
MENIGINEFIRS LAND SURVEYORSLAND USE PLANNERS
447 OldBoston Road U& Route #1 Tops i6U,, MA Ot983
(978)8 7-8586 'FAX(9,78)887-3480