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HomeMy WebLinkAbout2000-05-18 Response Comments SPR I _DuiCreshe-Henry, Itnc. OH Consulting Engineers 22 Free Street Portland,Maine 04101-3900 . Tel:207,776.3211 Fax:207,775.6Q4 E-mall:dhmalnegagate.net January 13, 2000 Mr. Tim Macintosh VHB, Inc. 101 Walnut Street Watertown, MA 02471 RE: Site Platt Review Application Construction of Airplane T-Hangars Lawrence Municipal Airport Dear Tim: In response to your fax of December 21, 1999 (copy attached) regarding the subject project, we provide the following additional information as requested. The items below correspond to the list provided in the fax. 1. The enclosed revised Grading Plan better shows the gravel drive, the nearest wetland area, and the surrounding terrain. 2. The revised Grading Plan includes typical cross sections of the aircraft parking apron and the gravel drive. 3. The revised Grading Plan now shows the existing and proposed drainage pipe size and types. 4. Drainage calculations are enclosed A detention basin will be constructed at the proposed drainage outlets to mitigate for the design storm events. Because existing topography is from aerial photogrametry, site layout will be performed during construction, and the detention basin will be sized at that time to detain the 0.45 acre-foot increase calculated for the 100-year storm event and to maintain the 100-year discharge rate of 2.15 cfs calculated for existing conditions. S, See Items 1 and 2 above. 6. Contours have been labeled on the revised. Grading Plan. 7. There are no easements on the project area. As a public use airport, airport land is to be developed only for aeronautical purposes unless otherwise designated on the approved Airport Layout Plan (ALP). The specific project site has previously been set aside by the Lawrence Airport Commission for the development of airplane hangars. This use is designated on the current ALP,which has been approved by the FAA and the Massachusetts Aeronautics Commission. 8. Revised plans have been stamped. 9. Existing topography is from aerial photogrametry performed by Eastern Topographies in 1994. Corporate Headquarters; Area Offices: Portland,Maine Port Charlotte,Florida North Springfield,Vermont Boston,Massachusetts Manchester,Now Hampshire Naples,Morlda www,d-hino.com Greenfield,Massachusetts Montpelier,Vermont Sarasota,Florida Westford,Massachusetts South Burlington,Vermont Alcrmmn Ckurrem Revlcw addrrdm wpd ('j P*d d W{&CYO W Pips, Mr. Tim Maclntosh, VHB, Inc. January 13, 2000 Page 2 Other issues: No water services are proposed or necessary at this time. The airport commission proposes to install water and sewer services to this quadrant of the airport within the next five years. The project proponent anticipates installing and maintaining a portable toilet on the site until sewer services are brought in to the site. The proposed project has been discussed with the North Andover Fire Department. Buildings such as those proposed, which are less than 7,500 square feet in size are not required to be equipped with fire suppression systems. We hope that this additional information is sufficient for you to submit a favorable report to the North Andover Planning Department. If you have any questions or would like more information, please do not hesitate to contact me. Very truly yours, DUFRESNE-HENRY, INC Steven G. Langlais, E. Senior Project Mana enclosures cc: Ms. Heidi Griffin,North Andover.Town Planner. fllc rceU[ing�rL5lle Revkw ad&rd=.wpd �('j Fµ'AtH16h1KpJyHb!1Pdrki JHN. 12.2000 10:BSRM VHb tutu.Ddc� r. J. Transportation Land Development Environmental 8ervtaa0 Inc101 Wainutstrect _ana&w Hansen Brustlin, , Post OiHcc Box 9151 W AterIOM Mauachuaetts 02A:71 j 617 0241770 PAX 617 sea 220 PAX Transmittal Det;vetTot SteveLanglis Prom: Timothy,&Wintosh,P.E. cmnpany: DuFreonL-Henry VHE Prvjeck Na: 99901 Telephone No.: 207.775-3211 PAX No,: 207-775-6430A OHgM-fTel-opy., 'Will not be sent Data artd rune, December 21,1999 Total Number of Pgges(Including Tt*iUft itt<tl Form); 1 ` RE: LawXezfce Municipal Airport-Airplane Hangar Site flan Review Steve, I enjoyed speaking with you yesterday, Per our conversation,I have included a,list of additional inforrmtion required before a thorough review of the site plan rain occur. Please note that this list is based on a b:def overview of the submission and additional items may be required as the review progresses, As you,will be ort vacation next wYeek,I suggest that you provide a contact in your absence in case additional inforrnaKQn is required. Additional Information Required: I. Larger scale topographic plan that covers the driveway limits,wetland area and surrounding terrain. 2. Parking lot pavement design and materials. 3. Existing drainage pipe sizes and proposed drainage pipe sixes. 4. .Proposed drainage calculations, 5. Gravel driveway layout and deWL 6. Labeling of existing contours. 7. List of easements,legal eorambxances or conditiorts placed upon the site(airport property)by any pubiic body or agency with'the authority to place cottidltiorw on the site's development. 8. Plans submitted bAO not been signed and stamped. —9. Basis`of existing topographic survey irtcluding the dates the siirvey was preformed and who preformed the survey. Other areas of concern are the proposed lack of water and sanitary services. The Applicant should discuss fire protection issues and sani"lwuues with the Planning Board. I understand,that the Pluu*tS Board hearing is scheduled for January 18,2000. As such,it is criticAl that this additional Wormtlort be provided so that the review can be completed in advance of the hearing, Thank you for your attention to this matter, Timothy B.McIntosh,P,E. \IMnwn'I1t�ee\adri6laar.,�vnRlovLY,unFG�rr.HANrrt�v.W ahfllrmc r DUFRESNE-HENRY, INC. PREPARED BY G'0- DATE 13 h 00 PROJECT NO. CALCULATIONS CHECKED BY DATE SHEET NO. OF ASSUMPTION 1 METHODS CHECKED BY DATE SUBJECT i? f S �v� wcc,Fe v kl�2u.yr ' ► .� + Yr LW rv► ��.sle In cvr�vi f r� -�r,�a�f �. I�ec� �= •3t�d X; �a - 1 Zap d � o s � :� Z ��-s )4G olvle go) r aveG , ' a ��tv�e� = t20 a� a Zoe ado = �Z, bav 5` U5 4 vd l via-( We C 1 P- L4 -3 as sCA'pme- 4p-le 1 vatine say Isl ylnt. 4,c) W H s IL 44( 1 v V i O u-s y i W i `�' �r V`a WI,. I use G O'W V- c P_L)e[L<) Le cif 60Yl- i r? !/taw ellue-we-pil CteJ too ( �-wv (oLGe5 tae- �P_ii v vo t vi e Va I u-eS r Coo y -rve u-eo c`/ 0 ��e� Iq sn � -��oc,.1 �cs � �• C� •�. 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' :Ai ■1i■M1t 1 / ■■ O III i'li' t I■►.O■%I ■■■iii • Mi■i■i,r!r r/I�r�Mo►,Ml.iii'i■■r4 � ■ � MoMN■■■i ■EEEEE•frfl'E� ■ I//AMWV.M■rAi ii iii ■iEEEEIWOi i■ 1 '11 i AI /I ■a�/ ■ ■N■■tE ■111 ■�■■ �■■N ■ . �111 ■■■■■■�■■■f�■ ■■■ o.�� oil .....�___�. . �.. .__MUSEMEMMEMME ___. moon mommum BONN NEW I I MIS�1■■■m■■■ ■1101 . 0i�s\i 411011 ME" 011111102120201 an MEMO MEN 7■ 1 ����■■�� .�``. ■oil WHIM mom ■!u■■��.`\C� BMW . Illi�■■�■ ■ 1 . � - , � 1 ■■ �Ili■■11►��\ . Il�r■�■1 ■1■■ ■ 1 � . �11■ ■,�1 ■■11■Ii■� try ------. 2-YEAR 24-HOUR RAINFALL(INCHES) � : :•h 'r, ''_51_y t+ Jtgr •1,7��L ;.� •. �. :�,_�1{{� rj��'� t.., _ �. 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J 'I 1 t tir. _t.' .:y ,_• r �• i� ' i ! •' T•, +.rL.� _�l� Il .I�I �1 is � r .I�'C- }l'1., .?'�ir;':. , "•` -i..'t'�I''1'r't - •• .,5 t J �_f '_ �. J:{` ':.j. ;.t.Z:�`.'s - - 's ..Jus-'� --5.5r' ,i •� 2 2.5 3. IrJ 5.5 6' >5.5 ti ••� t'� 0 100 200 300 400MI B t ` iP II ,�• t -�. F �' 5.5 ALBERS EQUAL AREA PROJECTION �`•� : 4 4.5 STANDARD PARALLELS 25'ANO 45- 'I `• 5 _ �,• ! a � »._ _._�'-___ ....E _ _.....,.-.—_ Figure lW.—T%vo-year,24-hour rainfall. L� 10-YEAk 24-HOUR RAINFALL:(INCHES) ; 5 i t i r• ,I 1- �I =fir ' t_ .5... i ,i� �:�� � / Q'. .r�N`. i -'� s,,., ! '••i. .i . 1[IIf � I-�,. I .�J35'• ��• 8- � � .r ,r,�' � ,� ; '��':`'. - +'''��i.�1 1'. 1_1 � �`.�'- 1] -"- •� 7 l � �-_ �r"i r. 'may'-,( �'i �.•� J1� ti .-. i'' �:';s r� W. I - h t L . , .. F, rt: :i` � '`', r ar _ i �r �t � -� -�I ,� _ _�;'': f ��~:��`-_ •;�.....iy'1, �- � ,� �'�- .I ..;• • .�- � .•�,i �.r.y _ ` �- ..� S,� I}�I} _ +' 1 -P I Fr��� y��,•'tt r f °"-t` -'. r-i �i� e 1 i ,k -- 0-3 14 33 � , `. -�,� •I ,. �i 74 � .J � ,' __.��,�(� w"��{��' t y':i"� �i`f�'`� y�r�.. tea. � ;� ' � -�. � I- �' ?.'�•.,�, `•�, `��dry•:'L. Z 0 100 200 300 400 M I k, - ALBERS EQUAL AREA PROJECTION - STANDARD PARALLELS 2S•AND 45• E 4•R•3949S-3 FlKure B-5.—Ten-Year,24-hour ralsi nfall. 7 ------- 100-YEAR 24-HOUR RAINFALL(INCHES), %'T :2 t 471 7 J, r -I,- 1 04AT'LAS ;da 9 ep 4 i h r A 0 M 4 i;, tv.' I YY 13 CIS JA 3 9t 2 G V L 200 300 400 ml to it ALBERS EQUAL AREA PROJECTION 1.2 13 STANDARD PARALLELS 25*AND 45' Filcure R-9—one-hundred-year.24-hour minrall. ............ ............. FM 5-335 it C values are obtained directly from table table 4-1, the Unified Soil Classification ng the 4-1. The value is based on the soil or cover System (USCS), the soil classification of porary characteristics of the predominant ground the predominant soil type must be known, le Sim- cover within the drainage basin. To use unless the area is covered by pavement. Ise, the eareas Table 4-1. Soil Drainage Characteristics, armula Unified Soil Classification System (USCS) od is as �. C VALUE j uscs WITH- MAJOR DIVISIONS DESIGNATOR DRAINAGE CHARACTERISTICS WITH TURF OUT TURF runoff, (3W PERVIOUS oA0 0.20 i GP PERVIOUS 0.10 0.20 ,res GRAVEL .ed on AND GRAVELLY d SLIGHTLY PERVIOUS 0.30 0.40 SOILS GM r U IMPERVIOUS 10.56 0.65 do Of COARSE- GC l IMPERVIOUS 0.65 0.65 GRAINED Ahod is SOILS SW PERVIOUS 0.10 0.20 ,ed. The SIR PERVIOUS 0.10 0.20 follows: I SAND AND rainage SANDY d SLIGHTLY PERVIOUS 0.30 0.40 may be SOILS SM U IMPERVIOUS 0.56 0.65 trement SC IMPERVIOUS 0.55 0.65 a 1-hour; ML SLIGHTLY PERVIOUS 0.30 0.40 se rain- SILTS )le from s AND CL IMPERVIOUS 0.55 0.66 CLAYS ompany LL C 50 lslty(R) FINE OL IMPERVIOUS 0.55 0.65 3p found GRAINED SOILS SILTS MH SLIGHTLY PERVIOUS 0.30 0.40 AND CH IMPERVIOUS 0.65 0.66 lent.It is i CLAYS ssed as i ; LL>�50 jected to OH IMPERVIOUS 0.65 0.66 1 and the � HIGHLY ORGANIC SOIL5 Pt SLIGHTLY PERVIOUS 0.30 0.40 affecting s,a large MANUFACTURED ASPHALT PAVEMENTS,ROOF SURFACES 0.95 the soil. SURFACES nd com- f' DO NOT CONCRETE PAVEMENT f. 0.90 lmost all I ADJUST herefore, FOR SLOPE GRAVEL OR MACADAM PAVEMENTS 0.70 site high, WOODED AREAS 0.20 ainwater 4-3 04/13/00 THU 16:26 FAX 2077756434 DUFRESNE--HENRY 0001 DUFRESNE-HENRY, INC. { MEMO TO: Michael Arcidi FROM: Steve Langlais ; DATE: April 11, 2000 � a SUBJECT: Response to VHB Site Plan Review of 2-1100 In response to the comments made by Mr. Tim McIntosh,we offer the following response to the respective items: 1. Coordination and submission to the Board of Appeals has been made regarding parking. 2, 1 believe the latest submission was stamped, however VHB's copy may not have been. The submission to the ZBA was also stamped, If a new copy needs to be submitted to the Planning Board with a stamp,please let me know and we will forward it to them. 3. S, ur�ey- Because this is an interior lot of the airport with no boundaries on any abutters' property, we requested a waiver on this with our original submission. Drainage- All appropriate drainage calculations, design, and drawings have been submitted. Traffic - We previously requested a waiver on this with our original submission. S Groundwater- Soil survey maps indicate the soil in the project area to be Paxton (PbB), hydrologic group C. This soil is listed to have a frequency of flooding of "none", and depth to the high water table of"greater than six feet". Based on this and our review of the site, we do not feel that the water table will be an issue in the detention basin. Flared End Section - The outlet of the 48-inch pipe will include a flared end section as shown on the plans, and we recommend also that rip-rap be placed to dissipate energy at the outlet. There is sufficient quantity of 6-inch rip rap at the existing outlet, which we can reuse for this project. Culvert - As per recent discussions with you, we recommend a I S-inch pipe to be installed under the gravel drive. Drainaae Areas - Subsequent to VHB's memo of 2-11-00, our drainage engineer provided the requested drawings showing the drainage areas. 1;TJ�