HomeMy WebLinkAboutMHF Ltr to ZBA re Drainage Review 2002.3.18 - Correspondence - 0000 Meetinghouse Road 3/18/2002 t�.
103 Stiles Road Suite One•Salem, New Hampshire 03079
i
MHF Design Consultants, Inc. TEL(603)893-0720• FAX(603)893-0733 •E-MAIL mhf@xtdi,com
March 18, 2002
North Andover Zoning Board of Appeals
Acting Chairman
North Andover Town Hall
120 Main Street
North Andover,,Massachusetts 01845
'Re: Meetinghouse Commons at Smolak Farms
MHF# 123101
Dear Mr. Chairman;
This letter has been submitted as a follow-up to the letter from VHB,Inc, dated
March 11, 2002 regarding the above referenced project and addresses the Drainage
Review section of their letter. Based on those comments in the Drainage Review section,
we offer the following:
1, The post development drainage map area.has been revised to include all.the areas.
The original report excluded,the roof areas from the post.development map:
because,theywere to be infiltrated per the Stormwater Management Regulations.
However, based on comments from Coler and Colontonio,we have revised the
drainage report to include all the roof areas in the post development drainage map.
See attached Stormwater Management report.
2. Continent acknowledged. See attached Stormwater Management report.
3. Comment acknowledged.
4. Type III rainfall has.been used.
S: Revised accordingly.
6. Corrections noted.
7. Roadside infiltration swales have been eliminated.
8. Comment acknowledged.
:9. The test pits,located adjacent"to the detention basins are representative.of the.
seasonal high water,table locatedthrou�hout the site Even if the groundwater
table were to affect the Mention,pand the groundwater would not hinder the
volume within the pond due to the:oWet structure being located at the bottom
elevation of the pond,therefore, no pon.ding would occur. The underground
system can also be constructed so that they are watertight and would not be
hindered by seasonal groundwater. It should also be noted that seasonal high
water table is as it implies, seasonal. Additional test pits have been excavated on
2 2 2002
OARD OFAPPEALs
ENGINEERS PLANNERS . SURVEYORS
I
the site in the location of the underground detention systems as req**&Ft3yn Consultants, Inc.
Cofer and Coluntonio.
10. No fencing will be provided around the detention basins.
11. Overflow weirs have been provided.
12. The computer program used for the project provides calculations for the culverts
proposed for the site.
13. The infiltration rates used for the calculations have been revised based on
information provided by Coler and Coluntonio.
14. Curbing has been provided on some sections of the roadway and the roadway
cross sections have been revised accordingly
15. The biofilter swale has been eliminated.
16.No easements are required for the detention ponds. The reviewer should be aware
that this project is not a residential subdivision where the detention basins would
typically be turned over to the Town or some other entity. The project will be
developed as a condominium type of development were all the common land is
owned by the all the residents of the development thru a condominium
association, therefore the maintenance of the detention basins will.be the
responsibility of the condo association. Therefore,it is not necessary,,for the
condo association to.grant themselves an easement for'maintenance of the ,
detention ponds.
17. There are no sections of.the roadway where there will be atypical cut section,
therefore no ditched section will be necessary. Subdrains may be used where
appropriate and as construction dictates.
We have forwarded I copy of this letter along with our responses to Cofer and
Coluntonto regarding the drainage to;VHB via overnight mail. A response to the
Environmental issues f section o the review letter will be forwarded to,VHB,Inc under
separate cover by Epsilon Associates. Please review the attached information and should
you have any questions,please feel free to contact me at your convenience.
Sincere yo rs,
N S L TS, 1NC.
Princip I
Cc. Mr:Torn Zahoruiko,Meetinghouse Commoins, L,LC
Mr. Timothy McIntosh,V" INC..
Mr. Chris Huntress,Huntress Associates
Mr. Michael Howard,Epsilon Associates
{