SILO GARDENWORLD COMPLETE SUBMISSION updated
STORMWATER
MANAGEMENT SUMMARY
1.0 PROJECT DESCRIPTION
The project consists of the construction of a new parking addition to the north of the existing rear parking
area of the Silo Restaurant & Gift Shop. The project proposed is to incorporate a residential parcel to the
north into the existing parcel to accommodate overflow parking for the existing commercial facility. There is
no proposed increase of the existing commercial use operating hours or facilities. Also associated with the
project is demolition of the existing residential structure / accessory buildings, landscaped buffer and
stormwater management.
The parcels are a 0.32 acre developed existing residential lot and a 0.77 acre developed existing commercial
lot. Project disturbance totals 0.33-acres.
2.0 EXISTING SITE CONDITIONS
The project site is mostly on the existing residential parcel which has a driveway (west side), house, covered
deck and a patio(east side) of the parcel, the central portion of the parcel is a slightly sloping (west to east)
grassed lawn area which has a retaining wall running north-south along the east section and partially along
the southwest corner of the south boundary. The runoff from the front half of the roof and driveway runs east
to west and discharges to the town road, the rear house roof, covered deck and patio runoff flows to the east
and is captured in the lawn area in a depression in the lawn along the retaining wall and infiltrates into the
soils. The eastern most portion of the parcel is gravel and grassed area that has three accessory buildings.
The runoff from this area flows to the southeast corner of the parcel and reaches an existing drywell on the
commercial parcel. Site slopes generally range from 2-4% from the west to east. Site soils are mapped as
Hinckley Cobbly Sandy Loam, HSG-A which are deep, well drained sandy soils on outwash plains. A deep
soil test pit performed for a previous project encountered fine and medium sands.
Existing Conditions Summary
Total Project Site Area: 1.09 Acres (combined)
Building & Porch Coverages: 9,010 SF
Walks, Drives & Parking Areas: 28,780 SF
Total Impervious: 43,285 SF
Drainage design points
The site is broken into four drainage design points. Design point 1 is the southern portion of the existing
commercial use which flows from the northwest entrance to the southeast entrance and drains to an existing
trench drain. Design point 2 is the north portion of the existing commercial use and the east portion of the
residential parcel which flows to the east and collects in the existing drywell. Note that during the 50 yr storm
the runoff from this area exceeds the capacity of the drywell and ponds in the existing parking area until it
eventually infiltrates into the drywell soils. Design Point 3 is the central east portion of the residential lot
which flows from the east half of the house roof to the lawn depression along the retaining wall. Design point
4 is the west side of the residential parcel which the west portion of the house roof and driveway runoff and
discharge onto the Town Road.
3.0 PROPOSED DEVELOPMENT
Proposed Conditions Summary
Total Project Site Area: 1.09 Acres
Building & Porch Coverages: 6,450 SF
Asphalt Parking & Permeable Asphalt
Parking Areas: 34573 SF
Total Impervious: 41,023 SF
Project Disturbance: 0.33 Acres
4.0 PROPOSED STORMWATER MANAGEMENT
As this is a commercial project with soil disturbances not exceeding 1-acre, NYSDEC SPDES requirements
for stormwater discharges from construction activities do not apply to the project. The Town of Queensbury
requires that commercial projects must implement stormwater management practices designed to manage
the 50-year design storm event.
Runoff from the south portion of the parcel will not be modified as no disturbance in this area is proposed.
Runoff from the new parking addition will be directed to a new catchbasin in the southeast corner of the new
parking area and discharge into a new stormwater subsurface infiltration trench. The new trench will be a 20
ft by 41 ft stone trench with 15 Cultec XL330 chambers in 3 rows of 5 chambers. The existing drywell will be
connected to the new catchbasin with 12” HDPE piping allowing the existing drywell to discharge into the
new infiltration trench. The permeable pavement infiltration was not included as part of the stormwater
calculations. Design points 3 will be eliminated as part of the proposed work as the new parking area will
discharge directly into design point 2. Design point 4 will also be eliminated as the landscaped area and
parking area will discharge runoff to design point 2.
An infiltration rate of 100-inches per hour is utilized for the infiltration facilities. Runoff calculations have been
prepared utilizing SCS TR-20 methodology and HydroCAD analysis software for the 50-year Type-II
simulated rainfall distributions. Criteria utilized in the analysis are summarized as follows:
The developed site has been modeled as a series of subcatchments (drainage areas) and ponds, as shown
on the HydroCAD drainage diagram. Full results of stormwater runoff computations are attached to this
report.
5.0 TOWN OF QUEENSBURY REQUIREMENTS
The Town of Queensbury requires that for commercial projects, the 50-year design storm event be
evaluated.
Existing 50-year peak storm volume: 0.182 AF
Developed 50-year peak storm volume: 0.172 AF
Existing 50-year peak storm discharge: 3.57 CFS
Developed 50-year peak storm discharge: 3.40 CFS
The 50-year storm calculations show that the Town's requirements for commercial projects are
met.
Gas ValveGas Test ValveGas Test ValveAsphalt ParkingAsphalt ParkingWood DeckSiloConcrete Pad with OverhangSignConcrete SidewalkSS-MHConcrete8'X4'Ø DRYWELLSign - No Parking To CornerStopSign30MPHSignSSSign"Center Lane Only"CBDrainage GrateNG9-1NG9-2U.P.U.P.U.P.IRFIPF2 StoryWood FrameBuildingLands N/F ofAftab BhattiLands N/F ofHarry Troelstra43.0'45.6'48.0'42.2'150.37'N 76°37'20" W50.50'N 37°13'10" W145.91'N 05°57'00" E S 80°34'00" E184.05'S 05°58'00"
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191.00'PARCEL 302.5-1-50Area=33353.0± SF0.77± AcresCedar RowCedar RowCedar Row
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6.0'A/C14" Spruce14" Maple20" MapleShedPatioCovered DeckShedShedOne Story WoodFrame HouseIPFIPF4" TreeN 05°57'00" E75.00'
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)CB-1107.0'107.0'Call Before You DigWait The Required TimeConfirm Utility ResponseRespect The MarksDig With Care800-962-7962www.digsafelynewyork.comDigSafely.New YorkGRAPHIC SCALESITE PLANSITE DEVELOPMENT DATAPARCEL 302.5-1-49LOT AREA:0.32-ACRES / 13,779 SFEXISTINGIMPERVIOUS AREASMAIN BUILDING1,475 SFACCESSORY STRUCTURES440 SFDECK, PORCH & PATIO645 SFDRIVE AREAS3,535 SFTOTAL IMPERVIOUS6,095 SFPERCENT IMPERVIOUS44.2%PERMEABILITY55.8%LOCATION MAPSITE LOCATIONMAP REFERENCES:SITE SETBACKSPARCEL 302.5-1-50REQUIRED FORCI ZONEEXISTINGFRONT(QUAKER ROAD)75'45.6'FRONT(CARLTON DRIVE)75'48.0'REAR (NORTH)25'42.2'REAR (EAST)25'43.0'NEIGHBORHOOD MAPSITE LOCATIONZONING REGULATIONSMDR - MODERATE DENSITY RESIDENTIALTAX MAP NO. 302.5-1-49MINIMUM LOT SIZE = 1-ACREFRONT SETBACK = 30'SIDE SETBACKS = 25'REAR SETBACK: = 30'SHORELINE = 75'MAX BUILDING HEIGHT = 40'LOT WIDTH = 100'ROAD FRONTAGE = 100'PERCENT PERMEABLE = 50%PARKING REQUIREMENTSCOUNTRY STOREFOOD SERVICE:TOWN OF QUEENSBURY REQUIREMENT:1 SPACES PER 4 SEATS100 SEATSSPACES REQUIRED: 25RETAIL BUSINESS:TOWN OF QUEENSBURY REQUIREMENT:5 SPACES PER 1000 SF OF RETAIL AREARETAIL SPACE: 5000 SFSPACES REQUIRED: 25TOTAL SPACES REQUIRED: 50ADA ACCESSIBLE DESIGN STANDARDS:NO. OF SPACES: NO. OF ACCESS. SPACES:1-25126-50251-75376-1004101-1255TOTAL ACCESSIBLE SPACES:4TOTAL SPACES PROVIDED:55SITE DEVELOPMENT DATAPARCEL 302.5-1-50LOT AREA:0.77-ACRES / 33,353 SFEXISTINGIMPERVIOUS AREASMAIN BUILDING6,210 SFDECK & PATIO240 SFDRIVE AREAS25,245 SFTOTAL IMPERVIOUS31,695 SFPERCENT IMPERVIOUS95.0%PERMEABILITY5.0%ZONING REGULATIONSCI - COMMERCIAL INTENSIVETAX MAP NO. 302.5-1-50MINIMUM LOT SIZE = 1-ACREMINIMUM LOT ROAD FRONTAGE = 50'MINIMUM LOT WIDTH = 150'MAXIMUM BUILDING HEIGHT = 40'FLOOR AREA RATIO = 0.3FRONT SETBACK = 75'SIDE SETBACK = 20' (50' TOTAL)REAR SETBACK = 25'PERCENT PERMEABLE = 30%SITE SETBACKSPARCEL 302.5-1-49REQUIRED FORMDR ZONEEXISTINGFRONT(CARLTON DRIVE)30'28.1'SIDE(NORTH)25'8.2'SIDE(SOUTH)25'6.0'REAR (EAST)30'107.0'ACCESSORY STRUCTURESTO BE REMOVEDEXIST. HOUSETO BE REMOVEDEXIST. CURB-CUTTO BE REMOVEDEXISTING CONDITIONS & DEMO PLANprepared for:Garden World Associates LLC537 Aviation Road - State Rt. 254 & 2 Carlton DriveTown of Queensbury, County of Warren, State of New YorkTAX MAP #'s 302.5-1-49 & 50Call Before You DigWait The Required TimeConfirm Utility ResponseRespect The MarksDig With Care800-962-7962www.digsafelynewyork.comDigSafely.New YorkHutchins Engineering PLLC291268-01-S2SITE DEVELOPMENT DATACOMBINED PARCEL 302.5-1-49 & 50LOT AREA:1.09-ACRES / 47,132 SFEXISTINGIMPERVIOUS AREASMAIN BUILDING7,685 SFACCESSORY STRUCTURES440 SFDECK, PORCH & PATIO885 SFDRIVE AREAS28,780 SFTOTAL IMPERVIOUS37,790 SFPERCENT IMPERVIOUS80.2%PERMEABILITY19.8%TP1SITE SOILS DATATEST PITSTP-1PERCOLATION TESTSIT-1
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)9.0'18.0'9.0'18.0'CB-1107.0'GRAPHIC SCALESITE PLANLOCATION MAPSITE LOCATIONNEIGHBORHOOD MAPSITE LOCATIONSITE DEVELOPMENT DATAPARCEL 302.5-1-49LOT AREA:0.32-ACRES /13,779 SFEXISTINGIMPERVIOUSAREASPROPOSEDADDITIONS TOIMPERVIOUS AREASPROPOSED TOTALIMPERVIOUS AREASMAIN BUILDING1,475 SF(1,475 SF)----ACCESSORY STRUCTURES440 SF(440 SF)----DECK, PORCH & PATIO645 SF(645 SF)----CONVENTIONAL ASPHALT/GRAVEL AREA3,535 SF2,876 SF6,411 SFPERMEABLE ASPHALT0 SF2,512 SF(50% REDUCTION OF 5,024)2,512 SF(50% REDUCTION OF 5,024)TOTAL IMPERVIOUS6,095 SF2,828 SF8,923 SFPERCENT IMPERVIOUS44.2%20.5%64.8%PERMEABILITY55.8%(20.5%)35.2%SITE DEVELOPMENT DATAPARCEL 302.5-1-50LOT AREA:0.77-ACRES /33,353 SFEXISTINGIMPERVIOUSAREASPROPOSEDADDITIONS TOIMPERVIOUS AREASPROPOSED TOTALIMPERVIOUS AREASMAIN BUILDING6210 SF----6210 SFDECK & PATIO240 SF----240 SFCONVENTIONAL ASPHALT/GRAVEL AREA25,245 SF(591 SF)24,654 SFPERMEABLE ASPHALT0 SF568 SF(50% REDUCTION OF 1,135)568 SF(50% REDUCTION OF 1,135)TOTAL IMPERVIOUS31,695 SF(23 SF)31,672 SFPERCENT IMPERVIOUS95.0%0 %95.0%PERMEABILITY5.0%0 %5.0%ZONING REGULATIONSMDR - MODERATE DENSITY RESIDENTIALTAX MAP NO. 302.5-1-49MINIMUM LOT SIZE = 1-ACREMINIMUM LOT ROAD FRONTAGE = 100'MINIMUM LOT WIDTH = 100'MAX BUILDING HEIGHT = 40'FRONT SETBACK = 30'SIDE SETBACKS = 25'REAR SETBACK: = 30'SHORELINE = 75'PERCENT PERMEABLE = 50%ZONING REGULATIONSCI - COMMERCIAL INTENSIVETAX MAP NO. 302.5-1-50MINIMUM LOT SIZE = 1-ACREMINIMUM LOT ROAD FRONTAGE = 50'MINIMUM LOT WIDTH = 150'MAXIMUM BUILDING HEIGHT = 40'FLOOR AREA RATIO = 0.3FRONT SETBACK = 75'SIDE SETBACK = 20' (50' TOTAL)REAR SETBACK = 25'PERCENT PERMEABLE = 30%MAP REFERENCES:OVERALL SITE PLANprepared for:Garden World Associates LLC537 Aviation Road - State Rt. 254 & 2 Carlton DriveTown of Queensbury, County of Warren, State of New YorkTAX MAP #'s 302.5-1-49 & 50Call Before You DigWait The Required TimeConfirm Utility ResponseRespect The MarksDig With Care800-962-7962www.digsafelynewyork.comDigSafely.New YorkHutchins Engineering PLLC291268-01-S3PROPOSED ZONE LINERELOCATE UTILITY POLEPROPOSED ARBORVITAE BUFFERPROPOSED ARBORVITAE BUFFERSITE SOILS DATATEST PITSTP-1PERCOLATION TESTSIT-1TP1SITE DEVELOPMENT DATACOMBINED PARCEL 302.5-1-50 & 302.5-1-49LOT AREA:1.09-ACRES /47,132 SFEXISTINGIMPERVIOUSAREASPROPOSEDADDITIONS TOIMPERVIOUS AREASPROPOSED TOTALIMPERVIOUS AREASMAIN BUILDING7,685 SF(1,475 SF)6,210 SFACCESSORY BUILDINGS440 SF(440 SF)0 SFDECK, PORCH & PATIO885 SF (645 SF)240 SFCONVENTIONAL ASPHALT/GRAVEL AREA28,780 SF2,285 SF31,065 SFPERMEABLE ASPHALT0 SF3,080 SF(50% REDUCTION OF 6,159)3,080 SF(50% REDUCTION OF 6,159)TOTAL IMPERVIOUS37,790 SF2,805 SF40,595 SFPERCENT IMPERVIOUS80.2%5.9%86.1%PERMEABILITY19.8%(5.9%)13.9%PROPOSED PERMEABLE PAVEMENTPROPOSED PERMEABLE PAVEMENTPARKING REQUIREMENTSCOUNTRY STOREFOOD SERVICE:TOWN OF QUEENSBURY REQUIREMENT:1 SPACES PER 4 SEATS100 SEATSSPACES REQUIRED: 25RETAIL BUSINESS:TOWN OF QUEENSBURY REQUIREMENT:5 SPACES PER 1000 SF OF RETAIL AREARETAIL SPACE: 5000 SFSPACES REQUIRED: 25TOTAL SPACES REQUIRED: 50ADA ACCESSIBLE DESIGN STANDARDS:NO. OF SPACES: NO. OF ACCESS. SPACES:1-25126-50251-75376-1004101-1255TOTAL EXISTING ACCESSIBLE SPACES:4TOTAL SPACES EXISTING PROVIDED:55NEW SPACES PROPOSED: 29TOTAL SPACES PROPOSED:84PROP. 20' x 41' x 4'DSUBSURFACE INFILTRATIONBED W/(3) ROWS OF(5) CULTEC XL330 CHAMBERSPROP. ASPHALT PAVEMENTWING SWALECATCH BASIN SCHEDULETAGLOCATIONSIZEGRATE EL.OUTLETCB-1SE CORNER OFPARKING4' x 4' I.D.96.310'' HDPE - INV. 93.1TO SUBSURFACE CHAMBERS10'' HDPE - INV. 93.1FROM EXISTING DWSITE SETBACKSCOMBINED PARCEL 302.5-1-49 & 50REQUIRED FORCI ZONEEXISTINGPROPOSEDFRONT(QUAKER ROAD)75'45.6'45.6'FRONT(CARLTON DRIVE)75'28.1'48.0'REAR (NORTH)25'8.2'107.0'REAR (EAST)25'43.0'43.0'PROP. MULCHED PERENNIALPLANTING AREA (428 SF)AREA VARIANCE SUMMARY§179-3-040 (B) (3) (b) [12] - PERMEABILITY- 30% MAX REQUIRED, 5 % EXISTING (SILO PARCEL),5.0 % PROPOSED (SILO PARCEL)- 30% MAX REQUIRED, 55.8 % EXISTING (RESIDENTIAL PARCEL), 35.2 % PROPOSED (RESIDENTIAL PARCEL)- 30% MAX REQUIRED, 19.8 % EXISTING (COMBINED PARCEL), 13.9 % PROPOSED (COMBINED PARCEL)- 16.1 % OF RELIEF REQUESTED
MIN.³£DETAILSprepared for:Garden World Associates LLC537 Aviation Road - State Rt. 254 & 2 Carlton DriveTown of Queensbury, County of Warren, State of New YorkTAX MAP #'s 302.5-1-49 & 50Call Before You DigWait The Required TimeConfirm Utility ResponseRespect The MarksDig With Care800-962-7962www.digsafelynewyork.comDigSafely.New YorkHutchins Engineering PLLC291268-01-S4STANDARD SPECIFICATIONS FORINLET PROTECTIONASPHALT PAVEMENT DETAILCATCH BASIN DETAILSTANDARD SPECIFICATIONS FOR SILT FENCEDEFINITIONPURPOSEAPPLICATIONDESIGN CRITERIAFABRIC MATERIAL CRITERIACONSTRUCTION SPECIFICATIONSSLOPE LENGTH/FENCE LENGTH (FT.)SLOPESTANDARDREINFORCEDSUPER<2%300/1500N/AN/A2-10%125/1000250/2000300/250010-20%100/750150/1000200/100020-33%60/50080/750100/100033-50%40/25070/350100/500>50%20/12530/17550/250ASPHALT PAVEMENT WING SWALE DETAILSUBSURFACE INFILTRATION BED DETAILSEDIMENT CONTROL FENCE DETAILWINTER STABILIZATION STANDARDSSTABILIZATION··MAINTENANCE····SOIL RESTORATION NARRATIVE····EROSION & SEDIMENT CONTROL NOTES············EROSION CONTROL IMPLEMENTATION SCHEDULEPRACTICEIMPLEMENTATION TIMEDURATION OF PRACTICESEDIMENT CONTROL FENCEPRIOR TO CLEARING AND SOILDISTURBANCEENTIRE PROJECT (REMOVE AFTER FINALSITE STABILIZATION AND VEGETATIONESTABLISHMENT)TEMPORARY SEEDING & MULCHINGAFTER INITIAL SITE GRADINGUNTIL FINAL GRADING AND VEGETATIONESTABLISHMENTSTORMWATER DETENTION AREASDURING FINAL SITE GRADINGPERMANENTSEEDING & OTHER VEGETATIONSTABILIZATIONAFTER FINAL SITE GRADINGPERMANENTSHRUB PLANTING DETAILPERMEABLE ASPHALT PAVEMENT DETAIL