The URL can be used to link to this page

Home My WebLink About20200270 Tait Lane Reserve Engineering Review 7-20-20 e� y a -� y�!� ^ ,'� `�" � � �"° �0��.r'��t,.�` ,' ��r�"� � `a,.�`> _..__ _ � � = !. ts+ x ' � � $..,'�.,.Jb��E "+a✓ �� :'�� .e � _� �`w.�4,,.9� I ._ :_ � x � �,<i�,r r� I _... . __ . _ __ _ _ __. _ ____ �:..1''�,_ i.ii��,. E :a[,< �li?I_ , 3��R1: ° s J ?: �_�'E"d�'� � l., :��ti�R� 1u1Y 20,?0?0 ��A:��iL bs.�i'L•IAI�, ��,��"" � � �� Ms.Ka�•i Donohue � ,�� Adn�inistrative Assistant-Engineering �� , �- City c�f Saratoga Springs 474 I3roadway � -w--� �"� Sa��aCoga Springs,New York 12E66 �y��"�`"" Re: Tait �ane SiYe I'lan I2�view Citv of Saratoea Sprin�s,Ne��Y�rk ____ Dear Ms.Donohue: � ��e are in reccipt of t11c foilo�n�ii��fo►•lhe abo4�e referenced subject� A. Stormw�ater Pollutian Pre��ention Plan (�t�'}}i'P),dated v[ay 2020; �3. Project Plans'`Tait Lane Reserve"prepared by Thc LA Groap, al1 rcvised ta May 8,202Q; - Cover Sheet - Survey - Site Preparation,Erosion &Sediment Cc�ntrol Plan-I.,-1.0 - t.ayout and Materials 1'lan-1..,-2.0 - Grading and Drainage Plan-I..-3.t)throu�h L-3.3 - Utilitv Plan-L-4.Q - Site Lighting Plan-L-S.0 - T,ar�dscape Plan- I..,-6.0 - Site Details-L-7.0 throubh�[�7.2 - Utility Details-L-7.3 through L-'7.4 - litility Prolile--I,8.0 thi�ougl� I;8.3 - I3uilding 1&2 Elevatic�ns - Buildir��3 �leti�ations - 13uilding 4,5,6 rlevations C. Site F'lan Application Form; D. ruil T:nvironmental Assessment I=orm; f�. City of Saratoga Springs Campiete Strcets C:hecklist; }�. Cost Estimate for Letter of Credit;and G. Engineerina Keport-Vb'ater and Sanitary Se�ver. Our comments on tlle materials submitted folla�v: General Commerets i. Applicatio�l nuinber 202002?0 sllould be added to a}] appfication docutnents and subsequent correspondence. 4 Computer Drive 4Vest��lban�; f�:�41� Yo�-�C"122Ci5� (528)4�'3 , ',?2��x(al�`?}4,fi-"ISi'4 c,r�v�v.lab�:r�egrottp.c:csnt Ms.Kari Donohue 3uly 2�,2020 Page 2 af 5 2. The City and tl�is of#ice sI�ould bc capied on correspondcnce by the applicent with otl�er agencies involved in��crmitting or othei��'vise approvin�;c�r offerin�comments an the project. 3. The NYSDEC Environmental Kesource i��tapper shows thc; presence of USf1COE wetlands. We u��derstand that a recent pr•aject inay have received approval to i�li isolated u�etlands on the property. f'lpplication materiais should d�cument cui�rent jurisdictional wetland stahis. Documentation of cun•ent we[land status should also be inctuded in the project's Storm l��%ater Poll�ition Prevention Platt{SWPI'P). 4. A review of the US. Fish & Wildiife Service (USFWS) Informatian for Planning and Consultatirn� {IPaC) indicates Cllat tl7e site may contain endangered species (such as the Ka:•r�er Blue F3utterfly) and protected migratory birds (such as the wood th►•�ish, eanada warbler, et.al.}. Tl�erefore, the appIicant should obtain a determination fram the bQth tlae N�YS Department of Environmental Protection and the USF��JS on the presences and conduct additioaial site investigations ta ensure that no e�idangered oi•pi•otected species woutd be taken i1i violatic��of the law. �. The applicant shauld scek a revie�v and comment letter from the Fire Department. b. Application materials indicate fhe project is intended for affo�-dable housing. lncome qualification criterion should be establishcd and incorporated into Cinal approvals. Water& Sanitary Erigineeri�g Re�ort 7. The report references that a h_ydrant test was performed on Allen Drive (page 1), but the water distribution modcl was prepared using City� supplied information. "1'he water model should be revised Co utilize h5�drant test information which may ret�uii•e additiana( hydrant tests. �t a minimum, a hydrant test on`I'ait Lane should also be perforniecl. ' 8. Waier main diameter arid pipe material should be verified and application documents should be updated as applicable. 9. Master meters have prow•en ta be a better way to monitor site usage since on-site i�ater consumption from hydrants atid lcaks �vill he captured if a meter is placed on the mains at point of connection into the site. Therefore; the project should coordinate with ihe;City to determine if master meters are the preferred means to recorci water consumption. 10. It appears that Saratoga County Sewer Distric;t operates the sanitary sewer system adjacent to the propased projeci, not the City. 1'he engineering report should include an eva[uation of system capacity and the ability to handle the increase of flow expected from this project, The repart should be updated accordingly, and a(etter indicating sufficient capacity exists and approvin�;the praposed connection should be obtained fram the sewer system operator. l l. T'he project should clearly identity on-site infiastructure proposed ta be turned over to the City. "I'he City wil( need to review the project proposal and conCrm their willingness to accept the improvements. Any proposed infrastructure to be turned over to The City should be obse►ved during constructiion to ensure the infrastructure is acceptable. 12. "I'he report shoutd be updated as required to reference existing water main diameters per Site Plan comments below. 13. The report (pa�e i) indicates tha2 1,274 gpm at 20-psi is available wl�ich e�ceeds ISO minimum needed fre flow{NFF) ofi i,Q00 gpm. Calcu(ations indicate that the required NFF is 2,250 gpm (Attachment A). The Applicant should revise the report as required to resolve the discrepancy. h1s. Kari Donohue ,fuly 2{?,2020 Pa�e 3 of 5 `I'��'�ic�T�a�aspar��tio�� 14. A traffie study is recommended to c�uantify additionat delay that may be e;�peetec� �rorn the site during AM/PM peak 15-rninute and peak l�our traffic periods and to detertnine if sufficient warrants e�;ist to maiadate as yet undetermined trafi�re safety improvements. 15. "I'he applicant should coordinate wit(i the Capital District"Cransit Authority to abtait3 hus stop and aiiy other transit recamtnendations they may be in a position to offer. As previously noted copies of all related correspondence should be provided to the City and this Office. 16. A side��alk connectio» along "f'ait Lane and C1lurch Stceet to coimect with the Tompiot� t..ane community should be considerecl to e��hance pedestrian mobility and community linkage. Letter o��redi# 17. VJhen comparing unit prices sha�vn, it appears the letter of credit may be tinclerestimatinp tota( project cost. The letter of credit estimate should sho«� individua( unit cost assemblies and cite reference materials used by titfe and revision date. For exanapte, the letter of'credit shows a blended cast of�3.50 per syuare faot for aspl�alt paving or $31.50 per square yard (lsy). Using RS Means pricing the tatal assemblv cost would be about$38/sy wi$iout liaulin�;. �ite�'lar�s t 8. The finaf mylar of the survey map must be signed and stamped by a Profcssional Land Surveyor (Survey Sheet). 19. The existing 6-inch water main along tlle north end af Allen Drive to Church Street should be shown on the final basemap. Tlie diameter of the existing evater main on Tait t.atie should be sho�vn as 8-inches per City records(Sheet L-4.0). 20. I�etails should be compared against standard reyuirements of the City of Saratoga Springs and , � Saratoga County Sewer District a�id madifed as necessa�y. �t a minimum, details should include a��ote which references the app(icable governing authority(Sheets L-7.0 througi�t�7.2). 21. Only one typical porous pavernent detail should be shawn and should be revised to show the stone course depth(Sheets L-7.0 and L-7.1). 22. Plans should be revised to sl�ow proposed electric, communications and natural gas utilities. The location of electrical transformers and fheir associated landscape screening should also be shown (Sheet L-4.0}. 23. Unless sufficient justification can be provided for Citi� consideration, only one (1) construction eutrance should be shown(Sheet L-1.0). 24. Pond should include bench for maintenance equipment access(Sheet L-3.2). 25. Identify where City Standard Street Lights are being propased(Sl3eet L.-5.0). 26. Water-sewer crossing should be shown on profiles to achieve a minii��um 18"vertical separatio�i (Sheet L-8.0). Storm Water Management 27. A draft copy of the stormwater agreement should be included in the SWPPP. The agreement shoutd be consistent with Chaptei• 242 of City Code. The City should consider addiiig a requirement that the iando��ner pravide animal documentation to the City in the form of arl annual inspection report prepared by a qua(i�ed design professionat. The agreement should also require that the landotivner pay for inspection or maintenance costs performed by the City or Gity Contractor if not completed by t11e landowner in a titnely n�annei•. Ms.f�ari Donohue July 20,2020 Pa�e 4 of 5 2�. "I�he project sliould provide an evaluation of the potential ground��ater impacts on d��•ellings adiacent t�th� site that mav resuh froxn the use ot porous pave�nents and a wet pond for project stormwater management. 29. TI�e }�raject appears to propose the discharge of ut}treated stormw•ater ti•om paved areas to a Cin� drainag�structure on AIIen Drive(SheeY I,3.0}. Although pIans indicate a catch basin exists,tl�is structure appears to be a dry�vell aild of unkno��rn condition. The design should be modified to eliminate disci�arge from paved areas of the site to tlie City right of way or storni sewer systeili. 30. The prc�ject is proposing to discharge stormtivater trom the site to the raiir�ad lands to the east (Sheet L-3.2). Since the e.cisting topography indicates that very timited runoff from the site would actually lcave the site; an additional evaluation should be provided to deTermine if extreme flood discharges toward the railroad parcel have tl�e potential to create an adverse cot�dition. 31. Drainage analysis maps (Sheets l�'-1 ar�d W-2} should be revised to include the f�ilo�ving information: a) Labeled tiine of concentration flo�� paths lvith the parameters used ta deteimine each flo«� segment; b) Soil types, boundaries and Zssociated hydralagic soit g►•oups; and c) Additional topographic data such as spat e[evations and e?cpanded tnapping to include the surrounding perimeter sufficientiy to ei7able full consideration of tlie offsite drainage pattert�s to which e�:istin� and proposed st�rm water would flaw and to substantiate the indicated drainage divides used in the analysis. 32. Based cm the existing topographic inapping provided, it does nat appear that the analysis Drainage Area 1 would in its entirety t�low off the site. (n fact, mapping indicates a signifcant portion of thc site does not drain aff-site. 'I'his may also accaunt far the USACOE mapped wetland area previously noted iii these comments. The indicated drainage area draining off-site to analysis point AP-1, the propased �vct pond discharge, does nat fully runaff the site; there are multiple areas where the��atcr wauld coilect.Therefore,tl�e drainage area should be significantly reduced and the anatysis and pond design adjusted accordingly{Sheet W-1}. 33. A �vet pc7nd detail sectians should be added to the plans and closely follow ttie outlined requirements per the Design Manual Section 6; for e�ampte, the foliowing should be includecl in plan and detail: a) The required dra�vdo��n dr ain with gate vaive per the Design Manual Section 6.1.6; b) The location and detail of a fixed verticaI sediment depth marker including typical instailation and marking to indicate ��hen accurnulated sediment is to be cleaned out; c) Since the proposed project utilires a wet pond warning signs for tt�e ��vet pond should be added to tk�e plans as per Design Manua( Section 6.1.6; and d) The location of all stormwater management signs should be indicated on the plans. 34. Stormwater management sign detaiis should be provided that include and fallaw the requirements stated in the Desi�n ManuaI Section 3.5 Page 3-12. Sign locations and details are required to be shotivn on the plans (Sheets L-�.l ttirough L-33 and Sheet L-7.1). Special attention should be applied to signage as needed to pratect porous asphalt parking Iots from winter sanding and other unsuitable activities(Sheet L-2.0). 35. The detail for the V-notch ��eir is incorrectly labeled as "Stone Overflow 4Veir" and s(�ould be revised to indicate the V-notch weir(Shect L-7.4). Ms.Kari Donahue July 20,2020 Pabe 5 of5 3b. Insutfcient weir ditnensions are prov�ided in plan and detail. Provide tl�e dimension used in the stormwater ana(ysis on the plans and details(8heets L-3.2,L-7.3,and L-7.�). ii. The stormwatcr anatysis should be re-run to include prior comments and a starting surface ��ater etevation for the pal�d equal to the elev�tion of t(1e bottom ofthe"V"in the v-notch weir. 38. The SWPPT' s��ould l�e revised to sl�o�v iile apparent seasanai high grc�undwater eievation far any infiltratian ar4a, including but not lirnited to porous pave�nenT areas, The "Porous Asphalt Pavement" detai) shouid iiiclude a ��ote that requires 2' minimum separation bet�veen the bottom in�ltration layer and seasonal I�igh groundvvatcr elevation(Sheet L-7.0/Sheet L-7.1}. 39. Secfion 5.2 (page 8) of the Stornlwater Management Report refererices "two infiltration basins and undergraund infiltration cham6ers"but these are��at utilized in the proposed desi�n. 40. The stormwater analysis should clarify what areas of'the pond are used in the stage storage calculations. Is the pond fore-bay storage included in the stage storage analysis for the wet pond? �1. I�ictude copies of the summary hydrograp}i plots with the analysis report. �rosion 3a 5ediment Controt 42. The limits of disturbance (I.,OD) should be shor��n on all plan sheets with the tatal area of disturbance in acres indicated. 43. Per the NYS Standards and Specifications for Erasion and Sediment Control (E&SC Standards} provide the sediment trap information on the plans, see page 5.47 of the standards. �4. As stated in the SWPPP i�arrative, the project will be phased so that less than five acres are active at any ane time(page 4).7'herefore,the project pliasing shauld be shown on plans��ith the area to i�e disturbed in each phase indicated and a specific non-generic sequence of construction provided foreach phase prapased. 45. The sequcnce oi� cc�nstruction tnust at a minimum include the 18 it�ms listed in the E&SC Standards "Design Process for Erosion and Sediment Cantrol Plans" (�ee p. 2.15 of ihe Standards). 4b. 1'he term "s�valc" and "ditch" are both used on the plans. Details and plan catlouts should be clarified to ensure the apprapriate practice and detail are utilized. 47. Check dams should be used in the diversion swales and noted as such on the plans. 43. Areas to receive restoration and�ermancnt seeding should be identified on the plan. Please feel free to call our officc if ye�u have an}�questions. Very truly y�urs, Lr'1BERGE GROUP .- ��r: _ ��=��„`_.`"...-.-- Philip�. Koziol, P.E. Project Manager PEK:jkb J:�02UO�R1Correspondence'tReview Letter 07_20_2U2U.docx