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HomeMy WebLinkAbout1984-08-17 Environmental Impact/Hydrology Report DEF SUB t 1 f rrHOMALST E NE ASSOCIAE iS, INC June 29, 1984 Planning Board Town Hall PIAW BOARD North Andover, MA RE: "'The Pines" Subdivision, Environmental Impact, Hydrology Report Dear Board Members: On June 18, 1984, T had the pleasure of presenting the referenced subdivision to your Board. Please find herewith supplemental information for your review. As per your Board's request at that hearing, this information is required under your Subdivision Rules and Regulations, and has to be submitted for your complete review of the project. We feel the project is complete and is in compliance with your regulations. I plan to appear before your Board on July 2nd and would be happy to answer any questions you may have concerning this project at that time. Very truly yours, THOMAS E. NEVE ASSOCTAJES, INC. OF M�, C �Vk OFMq� } o�� THOMAS yG 4� THOMAS rya EUG E ` ' `� EUGENE o HI~ NEVE ea � en Thomas E. Neve, P.E., R.L.S. ,o Ho. 30138 4 "� aA724o ��s-r£R off' -Enc. cc: J. Tuttle i ENGINEERS 447 OLD BOSTON ROAD i LAND SURVEYORS TOPSFIEL©, MA 019€33 LAND USE PLANNERS (617) 887.8586 i r ENVIRONMENTAL IMPACT S'IRP , `T' In accordance with the Town of North Andover Planning Board's Rules and Regulations Governing the Subdivision of Land under Section "B", Definitive Plan, Sub--Section 5, paragraphs a through f, please find this office"s Environmental impact State- ment and how each aspect relates to 'ibe Pines Subdivision, which we are currently proposing for Mr. John Tuttle. Paragraph a) 1. The plans as submitted are at a scale of 1" - 40' and are shown on four. sheets (Sheet 6, 7, 8, and 9 of 14) . The contour interval is 2 foot and shows all re- grading to be done with graphic treatment of all drainage structures and controls. 2. Vegetative Cover Analysis - The entire parcel to be subdivided is woodland, a portion of the tract easterly of Appleton Street, however, has been cleared recently of tree cover. Stumps and small saplings remain. There are no out- standing tree groupings or important wildlife habitats existing on this tract. Identification of all wetland areas is shown on the plan and shall be regulated by the Conservation Commission where applicable. 3. No test pits were excavated on the site so no estimate of the subsurface water table conditions can be made. All surface water conditions have been shown on the drawings. 4. Soil types based on U.S.D.A. Soil Study have been included in this study. Paragraph b) Physical Environment The variety of vegetation that exists on the site is quite typical'to any local vegetative woodland. The general topography is comprised of relatively steep sloping hills and well defined valleys with no unusual geologic, scenic, or historical features. The subdivision- as designed shall be built around the hills and -through the valleys in such a manner as to minimize the disturbance of the existing topography. Careful consideration has been taken to control, all drainage and erosion which will be generated. (See Section "C") . Paragraph'c) Surface, Water, and Soils 1. All water, wetlands, and drainage appurtenances have been shown on the drawings. 2. A detailed hydrological report is attached to this report which covers issues directly relating to post and pre-development runoff and the methods recommended to control runoff, sedimentation, and erosion control. Please refer to said report to be in compliance with Sections 3, a through f. 4. Sewage disposal shall be accomplished as follows: a. Primarily all sewage generated from lots east of Appleton Street shall flow by gravity in an approved sewer to a sewage pumping station located near Lot 10 as shown on the drawings. The sewage shall then be pumped via a force main to a sewer manhole located at about Station 4+45 and shall then flow by gravity to Appleton Street, then Northwesterly down Appleton Street via a proposed gravity sewer. (2) } ENVIRONME UAL IMPACT STIV=NT Primarily all sewage generated frcm the lots West of Appleton Street shall flag by gravity in an approved sewer to a sewage pumping station, located between Lots 30 and 31. The sewage shall then be pumped via a force main to a sewer manhole to be located at the intersection of Road "D" and Appleton Street, and shall then flaw by gravity Northwesterly down Appleton St. This proposed gravity and force main sewer shall have no impact on surface water, soils, and vegetation. All construction shall be within the limits of the proposed right of way with the exception of the two pumping stations. Paragraph d) Subsurface Conditions 1. The subsurface soil and water conditions should remain unchanged with the exception of the installation of services. Special backfilling procedures are shown in the "Trench Details" located on the drawings. There should be little if no change in the subsurface water table. 2. No percolation tests were performed on the site. Sanitary sewer is proposed, 3. Not applicable, no subsurface sanitary disposal systems are proposed. Paragraph e) Town Services 1. The estimated traffic flow shall be based on a maximum of 3 vehicles per household, 2 vehicle trips per day or a total of 6 vehicle trips per house- hold per day. 50% of that total capacity shall be assumed to occur at any peak hour, therefore, 3 vehicle trips per household per hour may be generated at any peak hour. initially, access shall be limited to a new road as shown as Road "D". All traffic shall be channeled via this road until Appleton Street is improved to Town specifications. At that point, we are estimating that 95% of the traffic shall use Appleton Street for access and egress. Ultimately the follcwing volume can be expected during any peak hour: 47 lots x 3 vehicle trips/hour 141 vehicles per hour, or 2.31 vehicles per minute. �=ledlMe Street, when improved, shall have more than enough capacity to adequately expected traffic volume. The circulation within our subdivision is circular with no dead end streets. ! 2. These are no parking areas proposed within the subdivision. 3. Police protection shall be required and with the construction of 47 new residences will add to the current patrol workload. Any cruiser driving through the proposed road may spend 5 minutes to patrol the new areas. The frequency of patrol may be 3 times daily, therefore increasing the Town's patrol time approximately 15 minutes.daly. (3) EJ\NIRONMTAL T.MPA.CT STATE", T Fire protection services should be typical. A water main shall be installed from Sear Hill Road down Road "D" and be installed along Appleton Street and Road "E". Because of the road configuration, the water system shall consist of'two large loops with no dead ends, a very desirable situation. Hydrants have been located as required. Fire protection capability is quite typical with no -limitation. 4. Public Works Department would be required to maintain the roadways within the subdivision, and all drainage, sewer, water, and services. Off street maintenance shall be required at each detention pond periodically to insure that no cross culverts have been blocked. Maintenance of both pumping stations shall also be required. 5. Based on current statistics, conservatively each household may generate 2 children which may use the Town's educational system. This subdivision shall be oomprised of moderate to luxury dwellings. Scme families may have no children who require the use of the system and others may use private educational institutions. With this premise, we are estimating that less than 50 children may be using the Town's educational system. 6. The 'Town Water Supply and distribution system shall be adequate to service the subdivision proposed. 7. The Town sewer system shall have the capacity to receive the expected sewage flow. Although our project does not conform to the Master Sewer Plan adopted by the DPW, our right to design, a sewer system to se-tvice a subdivision is allowable. In order to comply with the,Master Plan, the cooperation of land owners down- stream and in the direction where the DPW has preselected a pump station site, is required. Negotiations for this type of arrangement are somewhat time con-- suming. if cooperation can be secured, this Developer will be cooperative to the Town's efforts. We shall make the necessary provisions to review our sewer concept to correlate with the Tom's Master Plan. Until that point is reached, we shall proceed as per the present subdivision plan. Paragraph f) General Impact Generally, all subdivisions of the size proposed impact a ecxtmuni..ty. All efforts have been made to incorporate sound engineering and planning to generate a residential development which the Town could be proud of. Hydrologically, this area is sensitive, and for that reason, a very extensive study has been per- formed which will result in the installation of devices which shall cause no impact to the abutting landowners. Obviously the success of this development is directly related to the necessity for a contractor to comply with the design plans as proposed. We have every confidence that the Town's inspectors will assure this compliance. (4)