HomeMy WebLinkAbout2011-10-04 Planning Board Supplemental Materials (2) MERRIMACK ENGINEERING SERVICES, INC.
PROFESSIONAL ENGINEERS i LAND SURVEYORS o PLANNERS
66 PARK STREET•ANDOVER.MASSACHUSETTS 01810•TEL(978)475-3,555,373-5721 •FAX(978)475-1448•F-MAIL:merreng@aol.com
8 FANEUIL HALL MARKETPLACE•TH€RD FLOOR •BOSTON.MASSACHUSETTS 02109 -TEL(617)973-6462 • FAX(617)973-6406
September 19, 2011
Eugene P. Willis, P.E.
Director of Engineering
Department of Public Works 30 N1
384 Osgood Street
North Andover,MA 01845
NORTH ANDOVER
RE: Salem Woods Definitive Subdivision P `NG P6R
tMENr
Dear Mr. Willis:
We are in receipt of your review letter dated August 30,2011 for the above referenced
project.
With regard to item 1, enclosed is a copy of the revised Drainage Analysis for the project.
With regard to item 2, requires no response.
With regard to item 3, the plans have been revised and labelled as a"PRIVATE WAY"
With regard to item 4, a driveway is proposed and not a road, maintenance of which will
be the responsibility of a private homeowners association.
With regard to item S, the driveway is not intended to be petitioned to become a public
way.
Lastly, with regard to item G,the plan has been revised to address your concern.
We feel we have adequately addressed your concerns and respectfully request that you
review the revised plans in anticipation of a positive recommendation to the North
Andover Planning Board.
Youi truly,
William Dufresne, Project Manager
Merrimack Engineering Services
C.C. Jennifer Hughes,North Andover Conservation Commission
Judy.Tyn on,North Ar dover'`Planning Board
MERRIMACK ENGINEERING SERVICES, INC.
PROFESSIONAL ENGINEERS 0 LAND SURVEYORS A PLANNERS
66 PARK STREET•ANDOVER,MASSACHUSETTS 01810•TEL(978)475-3555.373-5721 • FAX(978)475-1448 -E-MAIL merreng@aol.com
8 FANEUIL HALL MARKETPLACE-THIRD FLOOR• BOSTON,MASSACHUSETTS 02109•TEL(617)973-M62• FAX(617)973-6406
September 19, 2011
Timothy B. McIntosh, P.E.
Vanasse Hangen &Brustlin, Inc.
90 High Street, 10t"Floor
Boston, MA 02110
RE: Salem Woods Definitive Subdivision—North Andover
Dear Mr. McIntosh:
We are in receipt of your review letter dated Sept. 1, 2011 for the above referenced
project.
With regard to item 1, we have revised the plan to show iron rods and stone bounds to be
set at the lot corners as noted. Existing monuments and the ties to proposed monuments
are shown.
With regard to item 2, sheet 2 of the plan set has been revised accordingly.
With regard to item 3, the existing water service and septic system has been added to the
plan.
With regard to item 4, setback distances have been added to sheet 4 of the plan set.
With regard to item 5, there are no proposed underground utilities with exception to the
septic systems infiltration trenches and water lines which are shown, electric sezvice is to
be overhead and is noted as such.
With regard to item 6, a second benchmark has been added to sheet 4 of the plan set.
With regard to item 7, stockpile areas have been added to sheet 4 of the plan set.
With regard to item S, the suggested note has been added to sheet 4 of the plan set.
With regard to item 9, this information is on the plan set with exception to the stations of
the PC's and PT"s. Since no roadway is proposed, we request a waiver to this
requirement.
With regard to item 10, again since no roadway is proposed, we request a waiver from
this requirement.
Page 2, Timothy B. McIntosh, P.E.
September 19, 2001
With regard to item 11, the applicable information has been added to the typical cross
sections shown on sheet 5 of the plan set,
With regard to item 12, 13, 14, 15, 16, 17, 19, 20, &21, VHB simply noted the waiver
requests and no revisions are necessary.
With regard to item 18, soil testing has been satisfactorily performed on all proposed and
existing lots. The Board of Health has acknowledged this in a memorandum to the
Planning Board stating that sufficient soils to support fully compliant septic systems exist
on each lot.
With regard to item 22,the plan has been revised to specify that all cut and fill slopes
shall be foamed and seeded.
Lastly,with regard to item 23, we have had an informal meeting with the Conservation
Agent and Chairman and agreed to file a Notice of Intent relative to wetland issues.
We feet we have adequately addressed all your concerns and respectfully request that you
review the enclosed revised plans in anticipation of a positive recommendation to the
North Andover Planning Board.
Yours XuIy,-
f 6
William Dufresne, Project Manag r
Merrimack Engineering Services
C.C. Jennifer Hughes,North Andover Conservation Commission
Judy Tymon, North Andover Planning Board
MERRIMACK ENGINEERING SERVICES,INC.
66 PARK STREET•ANDOVER,MASSACHUSETTS 01810
MERRIMACK ENGINEERING SERVICES, INC.
PROFESSIONAL ENGINEERS ® LAND SURVEYORS ® PLANNERS
66 PARK STREET•ANDOVER,MASSACHUSETTS 018111•TEL(978)475-3555,373-572? •FAX(978)47'i-1448• E-MAIL:merrengcaol.com
8 FAN EUIL HALL MARKETPLACE -THIRD FLOOR•BOSTON,MASSACHUSETTS 02109•TEL(61 7)973-6462•FAX(617)973-6406
Lisa.Eggleston
Eggleston Environmental
32 Old Framingham Road, Unit 29
Sudbury, MA 01776
RE. Salem Woods Definitive Subdivision
Dear Ms. Eggleston:
We are in receipt of your review letter dated August 29, 2011 for the above referenced
project.
With regard to item 1, as you agree this is a small project, it is our intention to request a
waiver from the phosphorous and nitrogen loading report requirement for this project.
With regard to item 2 and 3, the Drainage Calculations and design criteria have been
revised to address your concerns. More specifically with regard to the ability of the
infiltration swale to capture the run off, note that the drainage areas to the swale on both
sides of the driveway flow to the driveway, the driveway is primarily in a cut situation
such that both sides of the drive slope down towards the driveway. The driveway is
proposed to be super elevated towards the swale which will be the low point and
therefore no runoff will flow past the infiltration swale. As an added measure, we have
widened the swale to 4 ft. and increased the depth of the swale to 6 inches.
With regard to item 4, we evaluated your comment and concern. Since the drive is super
elevated and the center line slope of the drive is 7% in this area and the drainage area in
question is minimal,there is little likelihood of ponding and the minimal amount of
runoff from the slope will be accommodated by the infiltration swale. We have
performed testing throughout the site and in close proximity to this area. The seasonal
high water tables were consistently approximately 5 feet, as such, the cuts are less than
that and should not intercept the seasonal high water table.
With regard to item 5, we have added a note to sheet 4 of the plan set which more clearly
depicts the intention to drain the driveway towards the infiltration Swale.
With regard to item 6,we have completed additional soil testing, locations and logs have
been added to the plan. Soil conditions and water tables were very consistent throughout
the site and water tables and percolation rates have been safely estimated along the
driveway baseline.
With regard to item 7,we have adjusted the calculations to address your concern.
Page 2, Lisa Eggleston
September 19, 2011
With regard to item S,the infiltration Swale detail has been revised to address your
concern.
With regard to item 9, we feel that given this is roof run off only, a 50 foot setback is
acceptable as noted.
With regard to item 10 through 16, these items primarily pertain to verbage contained in
the O &M portion of the Drainage Report and have been revised to address your
concerns. Additionally,we have added an access manhole covers to the roof infiltrators
and have indicated snow stockpile areas on the plan.
Lastly,the Drainage Calculations have been revised to address your concerns and no
increase in run off is Iikely to occur. We have met with the Conservation Agent and
Chairman and do intend to file an N.O.I. wit h the Conservation Commission.
We feel we have adequately addressed your concerns and respectfully request that you
review the enclosed revised plans in anticipation of a positive recommendation to the
North Andover Planning Board.
Your ulY,
Wr ram ne,DufresProjectMana r
Merrimack Engineering. Services
C.C. Jennifer Hughes,North Andover Conservation Commission
Judy Tymon,North Andover Town Planner
MERRIMACK ENGINEERING SEWCES,INC.
66 PARK STREET•ANDOVER,MASSACHUSETTS 01810