HomeMy WebLinkAbout1998-04-10 Stormwater, Drainage & Water SPR r�
j
I CHRISTIANSEN & SERGI', INC.
11510 SV.bMIAE�,i"s';I R%"W.�9 8��,��P�: PNO�L� �"���,; "+C�'� 98'i&� h�i�h 6N����tl.�-��� .9. � �,978)37.3 O'110 !FA,Y.-I(978)3 7 2_396,10
June 101, 11998
Ms. Kathleen Colwell
Town Planner
30 Schooll Street
N orth Andover, MA 01845
Re'. Site Plan Review,,Lot 1- 1 -1 Orchard Itil.l.Roaud
Dear Ms. ColwelE
Enclosed are:the original .mylar drawings of the Site Plan for the above referenced
project. We have completed the required revisions as listed in the Special Conditions of
the Planning Beanrd"s decision of approval, Also enclosed is a copy of the required
drainage calculations for Catch basins 3 and 4. The frrllowirn ,is au suurn mr ry of the
revisions made to the plans.
1. Erosion control has been added two the plan. Siltation control ternee has been
indicated at the limits of work. along,the eastern property boundary a buattirr Lot
1- , . and along the undeveloped portion of Orcharrd Mill Road.
. flne drainage calculations for catch.basins 3, and 4 indicated that single inlet.
grates at each ofthe basins would of have the r'ealunired capacity to handle the
pear.auuan ff rues :from a 100,year storm. Also, the calculations indicated that the
pipe connecting Draaian fi' sunlvele A to Drain.M.M.nl ele 13 would net have sufficient
slc;n e to carry the expected flow l-rernn the two 'eautelu basins during a l year storm
event. The plains,have been revised to speeid double inlet grates on Catch Basians
3 aa.and 4, and the invert elevations of the pipes at C1 atch B asins 3 and 4, and at
Drain M.an hole A, leave been revised to produce pipe slopes adequate to handle the
expected Peak flows
The required drainage es,serrreant on the Barker Property,has been added to the
plans,
I have also, enclosed a set of blueprints of the site plan with all of the revisions
highlighted to facilitaat>e your review. Please contact rune if you have any ulurestio s
regarding this matter,
e "1:'rul ° Yunu I-se
, te� tL
Daniel A. U 1,on nell
C.C. John Clnessia, Soler& Colantonio, Inc.
i
I QQ ggIR IIII,y IIry yyMM��II �I��pN rr gS II II q SLL pry' R a�!, �y]INC,
p p o
N"b�"I'���'P 4.,,��'1w�V!M,�Itl����M'BL EV"'iNITO1 N'E:.�.T�,S Mw�D !�.R'"VN'IYIL wkk.A��`N'W�9 Ygi,�.�RS.
�VII� S�JllP&POE 15W'SIREE T (9781)3 7,3 D31O D FAX (9'1' ) .3172--�SW
Lot t- B-Y Orchard Hill Road
Catch Basin, inlet Capacity Analysis
drainage analysis has,been pet-formed tea determine the expected peak, rates of
ruinoff"to catch basins 1 and 4 daari n a 100 year storm, and to compare these rates to the
inlet capacities of the basins.. The " l rlro ad Storm water Modeling n, System has been,
used to, calculate the peak rates to ea.ela ofthe catch basins-
In order to determine the inlet capacity for catch basins 3 and 4, the capacity was
calculated for both the applicable weir and orifice formulas ft'ar the inlets- The lower of
these two values is the limiting capacity,
,
Using the weir f u°nrulaa Q = 3.33L(1 AI.)
where; Q = Capacity in efs
0J =Perimeter of grate subject to flow ill feet;
h= head in 1'eet.
For Catch,Basins 3 and 4.
Where: Q — Capacity in a l
Coefficient of discharge:
= Area of opening in, square leapt.
For Catch Basins 3 and 4;
Assunling vortex conditions': Q = '8YI/r, x 118 01's = 2-5 of
Conclusion, T he 23 cfs capacity of each of the catch basins is greater than the
expected peak flow rate 1, l e 1"
- -- - �� - -
...- — -.. p1��r a ..
... ca ,��
�'� � -� - as
_ �
� - � -
...� -� -
-:.-..
{ P ['''
�� � � ... �
....
..
.... —
�--�
_....—.._�r���....—. �_.. .
..
..
�a,�-- _ �
— � � �
� � � �
�z — ,...... � --._ _�
...
— - �- ...
_ . � .....
— ��
raa__..._ �—
...
..._ ... -
- � .. ...
i ��� ...
. .��r ��e�aasf� �ru� w���
� �
,�
� � �.�� ��� `� �xis r��
� �� �
� PLlV �F UUl►fTR1Bf1�'1lV `
�o 1s� �RAI � � .4 �'A FUR
���—� _. - �.UT 9 � 8- 1 C1RUFf�#?D J�+lLL RU�4�
� �Fo nw
IVUR T�f �4�!D� Eli, CIA '.
PRFP,+LRF�F�JP
!3& SGI�iti 1- s SD' �iF£e .kA4£ �, 1A9�
as n ss sorr
CN1�lTlASE ,S�R ! ��"` `""
aaa yur�ra rr�au�aeu.w a�asa r[� oxe-ru-orr�
}�rra ar iYroozraurserr f skew. rxc.
i
Data foz- LOB' 1-28-1 Olt uARD HILL ROAD. CATCH BASINS 3 & _ Page 1
TYPE 11 24-HOUR RAINVALL= 6.4 IN
Prepared by CRRTSTIANSEN & SERGI, INC. 9 Jun 98
ki�'oC.AD 4 _52 40L05'7 (c) 1986..-. 96 Apylied . i rrcr_naraputer SVS_i c�> s
SUSCATCHMENT 3 VLCW TO CATCH HASM 43
PEAK= 1 .21 CF4 @ 11 ,92 IIR4, VOLUME= .07 AF
CRE5 CIN SOS TR-20 I'9EfH<)D
_16 98 H.5, GROUP A, 1NIPERVIOUS TYPE 11 24-HOUR
.32 39 H,S, GROUP A, LA�gN RAI FALL= 6 .4 IN
46 3C} H.E, 03RO 3P A, WOODS, GOOD C'OND7 PAM= 10-20 HISS, dC=, 1 URS
_ 94 45
Me.Lbggn _ min
TR-55 9HEET PLOW Segmant 1L: A 1,4
Words, light underbrush n=.4 L:-50' P2=3, 1 in 9=4 .6
SHALLOW CQNCENTRATED/UJ$LAND FLOW Segment ID: S 1 ,2
Unpaved Kv=14S .1.345 L -2571 s=.o46 ' /, V=3 .46 fps
SHALLOW CONCEIRTRATED/UPLAND FLOW Segment XD o C :
Unpavod I{V:=lb .13+16 7.1=50' s_=.33 1 /1 V=9 _27 fps
SHALLOW CONC9NTRATM/UPLAND FLOW Segment ID: D 2,1
Paved Kv=20,3282 L=266 ' S=.011 ' /' V=2 .13 fps
Total. fie_ngth.. 623 Pt Total Tc" 4 .8
1JBCATCHMENT 3 RUNUFF
FLOW TO CATCH 805IN #3
1 .2
f , ; A1�EA= ,94 AC
3 . Tu= 4.8 MEN
C NI- 45
�. SCaS 'FH-20 METHOD
k TYPE 11 24- 110 R
�k F2f�IF F#LL= 6,.4 ZM
PEAK- 1 .21 CF
5
92 HR i
0 4 UOLUME= .07 AF
c.. ,J
. 1
.......... �_........
0.F x.... ......�._ __..A.............
TIME
Data fnr LOT 1-28-1 CR(_aARI} HILL ROAD, CATCH BASINS 3 & _ Paaje 2
'HYPE II 24-HOVR RAINFALLo 6 .4 IN
Prepared by CHRISTIANSEN & 9EROYT, INC. 9 Jun 98
HYdroCAD 4 ,52 001,057 (c) 1986-199k, App.ti,Za Microcourputer Sv .=
SUSCATCHMENT 4 CATCH BASIN #4
PFAK= 1 .61 CF 0) 11.89 HRS, VOLUME= 07 AF
.16 99 H.S- GROUP A: IMP8RVIOU9 TYPE 11 24-14OUR
-07 33 H.S. GROUP A, LAWN RAINFALL= 6 .4 IN
.23 80 SPAN= 10-20 HRLS, HRS
Meth r'-sySfRertl 'C (Z[Liri)
TR-55 SHEET FLOW segment ID; A 2 .7
Grass : Short n=.15 Ir=20 r P2=3 .1 in s=.02 'f
SHALLOW CONCENTRATED/UPLAND FLOW Segment ID- 8 2 ,0
Paved Kv=70 .3282 L,265 ' e=, 012 '/r V=2 .23 fps
Tnz-al Length= 285 ft Total Tc� 4 ,7
41-CH BASIN 44
1 ,5 ARER, .23 oc
3 Tr= 4./ MfN
C hE- 80
SCS TR-20 HH HOD
TYPE II 24-}i17LJR
ROENFALL.— 6.4 IN
-7 PEAK.- € .451 C:1=
_J .5 VOLUME= .07 AF
J
- 1
�.�. ............r. ....
� L s kn r m M 63
TIME (kour5)
PROJECT MEMO
AYHILL
LOT 1-2B-1
ORCHARD HILL ROAD
NORTH ANDOVER, A.
TO:KATHL' EE C OLWELL—TOWN PLANNER
FFtOM TE E FOSTER—D=ON & GARFIELD, INC:.
DA'T'E: 6118/98
REGARDING: PLANNING 80ARD 3PECIAL CONDITIONS
ATHLEEN:
PLEASE FIND ENCLOSED SET OF MYLAR PLANS WHICH INCLUDE THE
MODIFICATTONS REQUESTED BY THE PLANNING BOARD AND AS NOTED UNDER
"SPECIAL CONDITIONS" SECTION OF THE NOTTC-E OF APPROVAL.
A COPY Oda, SAME PLANS WILL BE PROVIDED TO DPW FOR THEIR REVIEW AND
APPROVAL.
THE DRAINAGE EASEMENT IS SHOWN ON 'ARE REVISED PLANS. THE ATTORNEY
IS PRESENTLY PREPARING DOCUMENTATION FOR RECORDING OF SAME.
PLANS AND DRAINAGE CALCULATIONS HAVE BEEN PROVIDED TO THE
DRAINAGE CONSULTANT AS NOTED ON TIME ATTACHED LETTER FROM
CHRI TIAN EN & SERGI
WE ASSUME THAT TIME WRITTEN DOCUMENTATION UNDER SPECIAL CONDITION
# 1A. (REGARDING A -DARK COLORED NON SHINY ROOF- ) IS SUFFICIENT
AND THAT NO DRAWING REVT ION IS REQUIRED TO INDICATE SANE. PLEASE
ADVISE iF OTHERWISE.
AS RRGARDS ITEM fklG . ; IS 'PHIS BOND REQUIRED AS A CONDITION OF SITE
PLAN ENDORSEMENT OR ,AS A CONDITION OF „FORM Uri APPROVAL ?
PLEASE CALL TO DISCUSS WHEN YOU REC8IVF.
THANK
FS . E. FOSTER, PROJECT MANAGER
FT5E:�Cyr�: 1 PROJECTS N BAYHII;L\MEMO 618C~
CC : SRY ,
FILE : FILE FOLDER
ortb Andover
al r Troalment Pimnrt
42 neat Pond Road
North Andover,MA 01845
August 23, 11999
Client Arco Exravators, 4"0
The' flbwing are the results, o the tests performed on your water s nptes:
Test(s)Performed:
°Fatal Coliform Bacteria
Dam CAtion 1 01 rrrl,.
f 13rchard Hill Road
Ifff you ply call US at 6188-9574.
Sincerely,
Kelly Ung
Senior Water Analyst
North Andover Water Treatment.Plant
Mass. Cert. 4 for Bacteria - MA210,54
I
� e
A. M , GALLAGHER
WATER MAIN SERVI ES TAPPING&7ESTiNC}
22 WESLEYAN TERRACE SHREWSBURY, MASSA HUSETTS 01545
(503) 842-6180
re�►o4s•� dill r ���fi
rs 110
. Pt
ICA yrcss",re- aoo &s. r { .
co mikults
�►�. fir. �.
I
A-Ba-]§� 2:32RM FROM R 2
AP] % 18
BAY HILL, LLE
355 M#ddkaX Avenue
Wilmington, massacliWeUS 01887
Attw Mc Robert E.'Webster .
ME Steven Web7s r . . .
- - ------ :--- - - ----- - —�- � - . .
R Drainage for Lot 2A Orchard HillFroad
.North Andover,WassacbusvtU
G uemen '
7N« correspondence serves as a w ritteri 5tate men to m|ow Bay Hal '
. L: and. successors to allow a drainage oUtf | on e -subject
p pew. . . . . .
\ Th G Cutfaft Wi I ru n dr mage wate r my property during a two
Year in w er event or more.
. Please feel free to call wrVou need anY addUon» information.
. Very truly yours,
George R. Barker '