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NYSDEC Supporting DocumentationI F�I BAYBROOK PROFESSIONAL PARK SUBDIVISION Town of Queensbury, New York Warren County SUPPORTING DOCUMENTATION FOR NYSDEC WETLAND STREAMING PERMITS Prepared by: NACE ENGINEERING, P.C. 169 HAVILAND ROAD QUEENSBURY, NY 12804 Thomas W. Nace, P.E. May 2001 Ask 95-19.3 (6/97)—q DEC APPLICATION NUMBER WRIBUTION NEW YORK STATE s DEPARTMENT Of ENVIRONMENTAL CONSERVATION 1ST COPY Permit Administrator OFFICE OF GENERAL SERVICES 5 � J3 y. ao�83 m 2ND COPY Corps Engineers ps of EB UNITED STATES ARMY CORPS OF ENGINEERS 3RD COPY Program AK US ARMY CORPS OF ENGINEERS JOINT APPLICATION©` 4TH COPY NYS Agency FOR PERMIT` 5TH COPY Applicant Please read ALL instructions on back before completing this application. Please TYPE or PRINT clearly in INK. Attach additional information as needed. PJ FRESHWATER WETLANDS ❑ TIDAL WETLANDS ❑ WATER SUPPLY ❑ LONG ISLAND WELL ® PROTECTION OF WATERS FOR: ❑T�A. Construction or placement of docks and moorings ❑ B. Construction, reconstruction, or repair of a DAM or other impoundment structure � /.-AC. Disturbance of a STREAM BED or BANKS or excavation in or fill of NAVIGABLE WATERS ❑ 401 WATER QUALITY CERTIFICATION ❑ COASTAL EROSION CONTROL ❑ LAKE GEORGE PARK COMMISSION )Docks and Moorings) ❑ WILD, SCENIC OR RECREATIONAL RIVERS ❑ AQUATIC PEST CONTROL FOR: ❑ A. Aquatic Vegetation Control ❑ B. Fish Control ❑ C. Insect Control ❑ LEASE, LICENSE, EASEMENT, or other real property interest in stale -owned lands under water ❑ UTILITY EASEMENTS (Pipelines, Conduits, Cables, etc.) 1. LIST PREVIOUS PERMIT/APPLICATION NUMBERS AND DATES (If any) IF OTHER THAN INDIVIDUAL, PROVIDE TAXPAYER ID NUMBER 5-5234-00287/00002-1 11/1993 14-1799644 2. APPLICANT IS A/AN: Ld Owner ❑ Operator ❑ Lessee ❑ Municipality/Governmentat Agency (Check as many as apply( 3. NAME NF APPLICANT (Use Full Name) Schnerhorn Properties, Inc. MAILING ADDRESS TELEPHONE NUMBER (Daytime) 15 F. Birdie Drive (518-798-0674 POST OFFICE STATE ZIP CODE Queensbury NY I 12804 4. NAME OF ❑Owner ®Agent/ConlactPerson Thomas Nace, Nace Engineering, P.C. MAILING ADDRESS TELEPHONE NUMBER (Daytime) 169 Haviland Road (51$-745-4400 POST OFFICE STATE ZIP CODE _ Queensbury I NY 12804 J. PROJECT/FACILITY LOCATION (Mark location on map, see Number la on reverse side) County Warren Town/CiyNigage Queensbury (Tax Mop Section/Block/Lot Numbe60- 2- 4 MAILING ADDRESS TELEPHONE NUMBER (Daytime) Bay Road I I POST OFFICE STATE ZIP CODE DEC USE ONLY Queensbury NY 12804 NYTM-E NYTM-N4 6.NAME OF STREAM OR BODY OF WATER Old Maids Brook 7.HAS WORK BEGUN ON PROJECT? YES, attach explanation on starting work without permit, include dates) B.PROPOSED STARTING DATE I(if Show work on map or drawing IAJ Yes No No work in permit area Summer 2001 9.APPROXIMATE COMPLETION DATE 1 O.PROPOSED USE: I (.WILL PROJECT OCCUPY STATE LAND? Fall 2001 1 ❑ Private ® Public ❑ Commercial ❑ Yes ® No 12.PROJECT DESCRIPTION AND PROPOSED PURPOSE: (e.g. quantity and type of material to be excavated, dredged or used to fill or rip rop; location of disposal sites; type of structure to be installed; height of dam; size of impoundment; capacities of proposed water sources; extent of distribution system; size of marina and types of docks and moorings to be installed; etc.) Placement of culverts in streambed to allow construction of 2 subdivision roads. Encroachment on 100 ft. wetland buffer to allow construction of stormwater management basins. 13 WILL THIS PROJECT REQUIRE ADDITIONAL FEDERAL, STATE AND/OR LOCAL PERMITS? 121 Yes ❑ No If YES, please list: NYSDEC sewer extension, Town subdivision approval 14.SEPARATE AUTHORIZATION OR LETTER OF NO JURISDICTION SHOULD BE RECEIVED FROM DEC, APA AND THE US ARMY CORPS OF ENGINEERS PRIOR TO WORK IN WETLANDS AND WATERWAYS. I hereby affirm that information provided on this form and oil attachments submitted herewith is true to the best of my knowledge and belief. False statements made herein are punishable as o Class A misdemeanor pursuant to Section 210.45 of the Penal Low. Further, the applicant accepts full responsibility for all damage, direct or indirect, of whatever nature, and by whomever suffered, arising out of the project described herein and agrees to indemnify and save harmless the Stale from suits, actions, damages and costs of every name and description resulting from said project. In addition, Federal Low, 18 U.S.C., Section 1001 provides for a fine of not more than S10,000 or imprisonment for not more than five years, or both, where an applicant knowingly and willfully falsifies, conceals, or covers up a malaria ct; or k wingly makes or uses a false, fictitious or fraudulent st.ter,,eni ❑ 1 hereby authorize the agent named in Numb 4 above' submit 1 '( pplicot' on my behalf. /� / / Dole S �O ( Signature of Owner ^"'� Title r )W A el- /�" s c �/P.s C" Date 5 �7 Signature Agent/Contact Perbey��,, of ����--. Title Y1 For activities located within the Adirondack Park, this is not an application to the Adirondack Park Agency, and is only a notice of availability for nvlew. The Adirondack Pork Agency will review this material and contact you for additional information as may be necessary. i SUBDIVISION PROJECT NARRATIVE BAYBROOK PROFESSIONAL PARK Bay Road, Queensbury, NY PROJECT NARRATIVE For STREAM CROSSING PERMIT AND WETLAND BUFFER DISTURBANCE Project Description This project consists of the subdivision of approximately 82 acres into 16 lots of various sizes. The subdivision will be accessed by a loop road off of Bay Road and will have a short cul-de-sac at the rear. Future development of the rear of the property will likely include an extension of the cul-de-sac on through to Meadowbrook Road. The 12 lots closest to Bay Road will be utilized for professional office development. The middle of the property will be utilized for multi -family housing, including an elderly housing complex. The use for the residual parcel (extending to Meadowbrook Road), has not yet been determined. In 1993 a professional office and residential subdivision was proposed on this parcel. The configuration of the roads and proposed stream crossings were nearly identical to those now proposed. At that time, an application for stream disturbance and wetland buffer disturbance was submitted and declared complete. Copies of the previous application and NYSDEC Notice of Complete Application are attached for reference. This previous application process was suspended prior to permit issuance due to difficulties encountered in providing municipal sewer service to the project. The current project has been reviewed and received final subdivision approval from the Town of Queensbury Planning Board. During its review the Planning Board conducted a SEQR review and resolved that the action will not have a significant impact on the environment. A copy of the Board resolution is attached for your files. Due to time constraints, the developer has proceeded at his own risk with some of the stripping of topsoil associated with this project. Erosion and sediment controls were put in place to protect the wetland buffer and stream corridor prior to any of this work. Additionally, no work has been, or will be, performed adjacent to the stream of near the wetland buffer prior to obtaining the necessary permits. Need for Permit Old Maids Brook traverses this property from north to south across the western half of the site. Bay Road is a major arterial highway in the Town of Queensbury. Therefore, the Town is requiring that this subdivision provide internal access for lots and not allow any individual driveways to access Bay Road. Given the configuration of the lot, the location of the stream and the presence of wetlands along the southern portion of the lot, it is not feasible to utilize this property without constructing two roadway crossings of Old Maids Brook. Each proposed stream crossing consists of two 42-inch diameter culverts. The northern culverts are 80 feet long and the southern culverts are 60 feet 0 long. A copy of the Stormwater Management Report showing the culvert sizing calculations is included in this submission. The soils on the site are fine sandy silts over clay at various depths. The height of groundwater varies, however in general seasonal high groundwater is within four feet of the surface. Therefore subsurface recharge methods of stormwater management are not feasible, and it is proposed to utilize detention basins. Due to the necessary configuration of the road and the location of the wetlands, it is necessary to construct three of these detention basins partially within the 100 foot wetland buffer. The enclosed Stormwater Management Report details the sizing of these detention basins. Mitieating Measures The proposed stream crossings will incorporate culverts designed to convey stream flows anticipated from a 25-year storm without any upstream headwater. The culverts will incorporate end sections to conform to the slope of the fill and to prevent undermining of the culvert ends. Rip -rap will be placed around the end sections to stabilize the area. Erosion control measures including hay bale dams and silt fences will be used to protect the stream and wetlands from sediment caused during construction. These measures will be kept in place until the site has been stabilized. Additionally, the design engineer will be observing the construction to assure that it conforms with the approved plans and that adequate erosion and sediment control measures are followed. The detention ponds will be dry basins that only store water during periods of runoff. The ponds will have a rip -rap bottom between the inlet and outlet pipes. This rip -rap will help to trap any sediments contained in the first flush runoff. The outlets of these basins are sized to limit the peak outflow rate of the basins to less than the existing peak runoff. The detention basins adjacent to Old Maids Brook will discharge into a rip -rap area of the stream or stream bank. The detention basin at the eastern end of the project will outlet in a rip -rap area approximately 35 feet from the flagged wetland and will be allowed to sheet flow across the buffer area which is thickly covered with brush and grass. The proposed road will be dedicated to the Town of Queensbury and will be maintained by the Town. It is my understanding that the Town Highway Department has discontinued the use of salt on its roads and is now using an environmentally safe chemical deicer. As such, the issue of road salt being allowed to enter the stream should not be an issue. Any sand used on the roads will settle out in the detention basins and will not enter the stream or wetland. Conclusion Although this project will encroach on the wetland buffer area for the stormwater basins, no encroachment to the delineated wetlands will occur. With the proposed mitigating measures, there should be no damage to the delineated wetlands or the stream as a result of this project. 11 BAYBROOK PROFESSIONAL PARK SUBDIVISION LOCATION PLAN OF NEW YORK , NEW YORKv f OF TRANSPORTATION • • 7.5 MINUTE SERIES (TOPOC 6270 I NW SW/4 GLENS FALI.S i'. uu AIMANI (LAKE GEORGE) ^OJ ' %._._.. __ 40' 690000 F_EET� 609 _ I610 �� I %/ "71f/j..�� 49 �• l /{• ...i t �- '/,` ' I \ Lukc f 11 ;'. .. . 71Lakc Slum eldc 3661 Cem- I� it i.l ! r i• - I)�;�' 1. .11.1i 1 t 1 l��l �I�'ir r� J ,•<<'i 1 r I,; ( \� .l S o � II II • �lK°„• . >r � GLEN LAKE _ .r �j J If 31, 11 �_ _ � ! / ,� I �l,• I (,II, .-' a� �i it � o tj � ,<.-/ �l� c— -^ J ^;1 Round , I I _i�) V�. �. Pond ae I sg1^kn1 \\ i�� neQ'f1 L5' _ <zl l I A airOndukf u��iljlnitYollpffe I P IL J f4 �b-i lI I I 1 I 3fio ��I (/' A m J to I4 '•:n�„u. V "' '�� el rive in �''• /��X P44 �IC.� Golf Cor heater / , •I• I :�, • ° i l.— ., v° n urse 11 306 i �l° r m �. \ e I �ANIlI oN - - •\I(l � 3 9- � � �� n i '1 �bP, 1rarel� H,� m� \•. RO 0 0 5 AYBROOK PROFESSIONAL PARK S11I3DIVtSION PROJECT PHOTOGRAPHS 11 - PI IVRtRt NY f.�Y' iV{�♦ °G^t„ij + Fly e � i�����r i'<4.+�.r�..>• a,. fj r 1 w R , ` .. : L i y all _; � k I . � ( N �"�i,� �i i�'� �� ••+, yr � / �. F %*-q�i'rJY �`z ��`+''yy�yy�"��$ x„1jt ': F� +1 ✓ � `�Q' or.,� 4 u / ' "+ tiT� � { �', cl�,� � fi.,�r�i �"[f r-ti 1.>''kA r- �_`�•— a� .i r�7"I ♦l �1 ay,a a � 'V° yarl . �a � ✓ s j � ,� , \ �: S ' Y y A v1 iC=i�♦ �.rs _ Yv "vr ^r \ L Pr _ d f ,.. y _ t f >: ' ••fJ l'Y:r�a ��\ r , a� rk ✓' I � �� : I C3AYBROOK PROFESSIONAL PARK SUBDIVISION PRIOR APPLICATION NOTICE OF COMPLETE APPLICATION B,kYBROOK PROFfJSSIONA ., PARC St-iBDIVISIO TORMWATER MANAGEMENT REPORT STORMWATER MANAGEMENT REPORT FOR BAYBROOK PROFESSIONAL PARK SUBDIVISION INTRODUCTION The site of the proposed Baybrook Professional Park Subdivision is on the east side of Bay Road, opposite Walker Lane, in the Town of Queensbury, NY. The entire site extends through to Meadowbrook Road and contains approximately 86 acres. The proposed subdivision contains 16 lots of various sizes. The subdivision will be accessed by a loop road off of Bay Road and will have a short cul-de-sac at the rear. Future development of the rear of the property will likely include an extension of the cul-de-sac on through to Meadowbrook Road. This report addresses drainage issues pertaining only to the development of the subdivision roads and infrastructure. Development of the individual lots will include on -site stormwater management to address added impervious areas on the individual lots. EXISTING CONDITIONS The site is a gently sloping meadow. There is a stream (Old Maids Brook) flowing north to south across the west portion of the site. There are two areas of freshwater wetlands which have been flagged by NYSDEC. These are also ACOE wetlands with boundaries slightly different from the NYSDEC boundaries. However, all of the ACOE boundaries fall within the 100 foot buffer of the NYSDEC wetlands. There are also two additional small areas of ACOE wetlands. All of the wetlands are shown on the design drawings. Soils within the area of the proposed subdivision are generally Raynham silt loams. Seven deep test pits were dug in the areas of the proposed subdivision. All of the pits encountered very fine sand, silts or clay loams over clay subsoils. Evidence of seasonal high groundwater was present in all of the test pits at depths varying from 11/2 to 3 feet. Groundcover on the existing site is predominantly overgrown meadow with some brush. There are some forested areas along the southern portion of the site. All existing drainage from the portion of the site to be developed runs off into Old Maids Brook as it crosses the site. This brook flows into the wetland along the southern portion of the site and eventually finds its way across the adjacent Bay Meadows Golf Course and into Halfway Brook. DRAINAGE METHODOLOGY Since the existing soils are relatively impermeable and the groundwater is high, it is not practical to use subsurface infiltration to disperse of the storm runoff from the subdivision. Therefore, a storm sewer system is proposed to collect the runoff. These storm sewers will outfall into Old Maids Brook. The outfalls will incorporate detention basins to allow the collected stormwater to outlet into the brook at approximately the same rate that it presently reaches the brook. These basins will be shallow and will incorporate a rip -rap surfaced overflow spillway. The basins will be sized to store the runoff from a 50 year design storm. New culverts will be installed at two locations where the proposed subdivision roads cross Old Maids Brook. These culverts have been sized by analyzing the entire upstream drainage basin of Old Maids Brook. Drainage areas for this drainage basin are shown on the plan included with the culvert analysis. This plan also labels the components of the drainage system as they are modeled in the HydroCAD analysis. CALCULATIONS All computations SCS TR-20 HydroCAD. 50 year storm event — Type II rainfall=4.8" — for detention basin and storm sewer sizing 25 year storm event - Type II rainfall = 4.6" — for culvert sizing Soil conditions — very fine sands, silts & clay loams — SCS soil group C Runoff rate and volume computations for the 50 year storm event have been completed for both the pre -developed and developed conditions. Detention basins have been sized to maintain adequate freeboard during a 50 year design storm. Road culverts have been sized to provide adequate capacity for a 25 year design storm without submerging the inlet or storing water at the upstream end of the culvert. See attached HydroCAD analysis for all computations. CONCLUSIONS Detention Pond #1 Pre -developed peak runoff rate - 0.70 cfs Post development peak runoff rate - 0.78 cfs Detention Pond #2 Pre -developed peak runoff rate - 0.83 cfs Post development peak runoff rate - 0.81 cfs Detention Pond #3 Pre -developed peak runoff rate - 0.92 cfs Post development peak runoff rate - 0.85 cfs Detention Pond 44 Pre -developed peak runoff rate - 0.28 cfs Post development peak runoff rate - 0.31 cfs K ave to Based upon the attached HydroCAD analysis, the detention basins hear stormeventcapacity and post manage all runoff generated by the subdivision roads during a 50 y development runoff will be maintained at pre -developed level. K