HomeMy WebLinkAbout1998-11-19 Engineer Review SPR i
L
COLANTONIOZ
UNGINEEgS AND SOUNTIS7rS
July 31, 1998
Mr. Michael Howard
Conservation Commission
Town Hall Annex
30 School Street
North Andover,MA
RE: Notice of Intent
Executive Quarters
Engineering Review
Dear Mr. Howard:
In response to you r request' Coler& Colantonio, Inc. has reviewed the above referenced.
submittal. Our efforts included a comparison of information submitted with respect to
the requircments of the Wetlands Protection Bylaw and Wetlands Regulations, In
addition, plans and calculations have been reviewed for conformance with standard
design practices, The submittal package included the following information:
Plans entitled:
• "Executive Quarters in North Andover"; Mine sheets elated June 30, 1998.
Prepared by Mamhionda&Associates, L.P.Received July 8, 1998.
Reports entitled"
® "Notice of Intent for Executive Quarters in North Andover",nine sheets dated
June 30, 1998, prepared by Ma>~chionda&Associates,L.P.Received July, 8,
1998.
The site is located at the intersection of Highland Road and Route 125. The site has only
a four-foot variance in elevation with wetlands as a border on the north side.
Our comments are as follows:
1. Section V. C. 4.--There does not appear to be any curb cut in order to enter the
property as shown. It is u mlcar if there is an access to the existing foundation on the
site.
2. Section V. C. 8.—The hydrologic calculations did not include the existing outlet on
the north side of the wetlands. Calculations were only to the wetland edge. The
impact at the outlet should be determined.
101 Accord 'ark Drive 781 982-5400
Norwell, MA 02061-1685 Fax: 781-982-5490
3. Section V. C. 10,—The Commission may require the submittal of a plan showing the
final wetland delineation at the same scale as Town wetland maps.
4. Section V. D. 1.—The Regulations rNuiare that electric,cable and telephone utilities
be indicated on the plans.
S. Section V.D. 4.The slope is not indicated and there is no cross section of the
drainage Swale that wraps around two sides of the site. It is unclear how and where
the swale starts.
6. Section Vt. A,—The offshe contours do riot appear complete. It is unclear if the
contours on the north side of the wetlands grade toward the wetlands themselves.
The impact of the runoffnorth of the site is unclear. Additional topography should be
added to the plans.
7, Section VI. B. 1.—A description of valuable and/or unique wildlife habitat
characteristics should be submitted. An Estimated Wildlife Map was submitted it is
unclear if this is sufficient.
8. Section VI. C. X —The proposed stormwater management system should be based on
an analysis of the existing and proposed hydrologic conditions. The existing wetland
outlet was not included in any analysis.
9. Section VI. C. 3.—States that calculations of the annual storm are required. This
storm has not been modeled.
Stormwater Management Polley
t lord 1
Satisfactorily addressed.
Standard 2
We disagree with the assumption of woods in f* condition, This assumption is
inconsistent with our site observations. It is unclear that the eight-inch opening in the
outlet structure will have a free discharge since the 12-inch opening is at the same invert.
The Bow paths are not indicated on the Past-development Subcatchmcnt Area plans
however,the times of concentration looked reasonable.
S
Test pits have been performed adjacent to the proposed infiltration system. No
permeability test information was provided. The analysis should 'include time for the
I
system to drain. We note that test pits indicate a relatively thin layer of permeable
material.
4
The Conservation Commission may want assurances that street sweeping will be
performed to the extent required to comply with the standards. It is also unclear that the
detention basin holds runoff for a sufficient length of time to qualify as an"extended
detention basin".
Stand W 5
Not applicable.
Standard 6
Not applicable.
Standard 7
Not applicable. Components of this site have not been developed.
Standards 8 & 9
It is our understanding that Town Staff typically reviews these Standards.
We appreciate the opportunity to assist the conservation Commission on this project and
hope that this infinwation is sufficient for your needs. We would be pleased to meet with
the Board or the design engineer to discuss this project at your convenience. If you have
any questions please do not hesitate to contact us.
Very truly yours,
Yo
ER&COLANTONIO,INC.
C. Chessia,F.E.
xc, Marchionda&Associates,L.P..
mee/ICC
COL
.ANT N1 z_
ENGINEERM ANO S4--1GNTi9-rs
September 10, 1998
Planning Board
Kathleen Colwell
Town Hall Annex
30 School Street
North Andover, MA 01845
RE: Supplemental Engineering Review
Executive Quarters
Site Review
Dear Ms. Colwell;
In response to your request, Coler&Colantonio, Inc, has reviewed the site plans for the
above referenced site. The project has been,supplementary reviewed for conformance
with the requirements of the"North Andover Zoning Bylaws", In addition, we visited the
site on July 30, 1999 to observe existing conditions. The submittal included the following
information:
Plans Entitled:
« "Executive Quarters"tern sheets dated Tune 30, 1998,revised August 31,
1998. Prepared by Marchionda&Associates, L.P. Engineering and Planning
Consultants.
Reports Entitled:
® `Weighted TSS Removal Cal,cul8tion and supporting data' performed by
Mareionda& Associates,received August 31, 1998.
• `Orifice Design.Criteria'per Engineering Data Systems Corporation, received
August 31, 1998.
`Response letter' prepared by Marcionda&Associates,received August 31,
1999.
The site is located to the northeast of the junction of Route 125 and Hillside Road,
between the Andover Bypass, Salem Turnpike and Hillside Road. T o site slopes
gradually from the south at the intersection of Hillside Road and the Andover Bypass to
the wetlands at the north side Of the property.
-------------------------
101 Accord Park Drive 781 982-5400
Norwell, MA 02061-1685 Fax: 781-982-5490
Information Required;
Zoning Bylaws
1 Section 8,3)5.)e,)i.)The location rnap does not include a north arrow.A north
arrow has been included on the location map,
2, Section 8.3)5.)e.)ii.) no existing drainage easement should be tied down with a
metes and bounds description. 'lis easement should be indicated on grading and
drainage plans. The drainage easement has been added to the grading plan and
the easement has been tied down with metes and bounds on the existing
conditions plan.
3. Section 8.3)5.)e,)iii.)A schedule of the proposed development phases is not
included. Reportedly, the project Is to be built in one phrase.
4. Section 8.3)5.)e.)v.) The contours do not extend 50 feet beyond the site
boundaries.Additional topography has been added to the plans.
5. Section 8.3)5.)e.)vi.) Sign dimension requirements and proposed conditions are
not included in the zoning information, Reportedly, sign information will be
forwarded shortly.
6. Section 8,3)5.)e.)vii.) We have reviewed the drainage system for the Conservation
Commission under the Notice of Intent filing. A copy of this review is attached.
We have received a response on the Notice of Intent and will forward our revised
drainage review when complete.Please refer to our supplemental review of the
N.01 submittal for drainage system comments.
7. Section 8.3)5.)e,)ri.) We have reviewed the Notice of Intent, please see comment
&. above.Please refer to comment 5.
8. Section 8.3)5.)e.)xii.)Proposed sign dimensions and locations are not labeled on
plants. Please refer to comment 5.
9. Section 8.3)5.)e.)xv.) Trees to be removed and retained are not clearly delineated.
.existing trees within 25 foot wetland buffer are to remain. It is unclear which
trees outside of.2S foot buffer will remain.
10. Section,8.3)5.)e.):Kvi.)Refuse screening and enclosure is not illustrated on plans.
An 8-foot stockade fence around the proposed dumpster is indicated on the
landscape,plan.
1
i
z 1. Section&,3)5,)e,)xviii.) For our review of the drainage basin study,please refer to
comment 6.
12. Section $,3)5.)e.)xxi,)Profiles for proposed sewers are not included,A sewer
Profile has been included on the plans,
13. It is our understanding that Sections 8.3)5.)e.)xix,xx,xxii,xxiii,are typically
reviewed by Town Staff.No further comment,
We appreciate the opportunity to assist the Planning Hoard one this project and hope that
this information is suMcient for your needs. We would be pleased to meet with the Hoard
or the design engineer to discuss this project at your convenience.If you have w y
questions please do not hesitate to contact us.
Very truly yours,
COLER& COL,4NTON10,INC.
John C. Chessia, P.E.
Encl.
cc: Marchionda&Associates, L.P.Engineering and Planning Consultants
Jim hand, DPW
jpl/JCC