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HomeMy WebLinkAboutAgenda 06_124 Nowland Farm RdUP UP UP UP UP U P EX I S T I N G C O M M U N I T Y G A R D E N S SPEAR STRE E T UP S W E P T L A N E PINNACLE D R I V E E X I S T I N G M O W E D G R A S S P A T H TO S P E A R S T R E E T PARKS I D E D R PARKS I D E D R Sheet Title Project Title Use of These Drawings Scale: Project Number: Date: Drawn By: Project Engineer: Approved By: No. Description Date By Revisions Field Book: 1. Unless otherwise noted, these Drawings are intended for preliminary planning, coordination with other disciplines or utilities, and/or approval from the regulatory authorities.  They are not intended as construction drawings unless noted as such or marked approved by a regulatory authority. 2. By use of these drawings for construction of the Project, the Owner represents that they have reviewed, approved, and accepted the drawings, obtained all necessary permits, and have met with all applicable parties/disciplines, including but not limited to, the Engineer and the Architect, to insure these plans are properly coordinated including, but not limited to, contract documents, specifications, owner/contractor agreements, building and mechanical plans, private and public utilities, and other pertinent permits for construction. 3. Owner and Architect, are responsible for final design and location of buildings shown, including an area measured a minimum five (5) feet around any building and coordinating final utility connections shown on these plans. 4. Prior to using these plans for construction layout, the user shall contact TCE to ensure the plan contains the most current revisions. 5. These Drawings are specific to the Project and are not transferable. As instruments of service, these drawings, and copies thereof, furnished by TCE are its exclusive property.  Changes to the drawings may only be made by TCE. If errors or omissions are discovered, they shall be brought to the attention of TCE immediately. 6. It is the User's responsibility to ensure this copy contains the most current revisions.   Rendered Plan 08/01/2024 SHOWN 22-512 JLA AAD   Hubbard Recreation & Natural Area Nowland Farm Road South Burlington, VT   For Permitting Only U P UP UP D D EXISTING COMMUNITY GARDENS EXISTING DRILLED WELL EXISTING ELECTRICAL PANEL EXISTING BURIEDELECTRIC & COMMUNICATION CABLES EXISTING HOME, TYP. N/F LIANG WAN TING N/FWILLIAM & JUDITH MCMEEKIN N/F KELLEY GARDNER TRUST N/F N/F DALE & MARIE BAUMAN N/FTHE SOUTH POINT HOMEOWNERS ASSOC. INC.N/FTHE SOUTH POINT HOMEOWNERS ASSOC. INC. EXISTINGVEGETATION EXISTINGVEGETATION N O W L A N D F A R M R D SP E A R S T R E E T UPSWEPT LANE VA L E D R FO U R S I S T E R S RO A D CLASS IIWETLAND CLIMATE CHANGESTUDY AREA PIN N A C L E D R I V E NOWLAND FARM RD SH E E T C 6 - 0 1 SH E E T C 6 - 0 2 SH E E T C 6 - 0 3 PROPOSED PARKING LOT PROPOSED 10' WIDE SHARED USE PATH PROPOSED 10' WIDE MOWED GRASS PATH TO SPEAR ST R E E T P A R K S I D E D R EXISTING MOWED PATH EXISTING VEGETATION Sheet Title Project Title Use of These Drawings Scale: Project Number: Date: Drawn By: Project Engineer: Approved By: No. Description Date By Revisions No. 9020CIVIL ABI G A I L A. D E R Y STA T E O F VERM O N T P R O FESSIONAL E N GINEER LICEN S E D Field Book: 1. Unless otherwise noted, these Drawings are intended for preliminary planning, coordination with other disciplines or utilities, and/or approval from the regulatory authorities.  They are not intended as construction drawings unless noted as such or marked approved by a regulatory authority. 2. By use of these drawings for construction of the Project, the Owner represents that they have reviewed, approved, and accepted the drawings, obtained all necessary permits, and have met with all applicable parties/disciplines, including but not limited to, the Engineer and the Architect, to insure these plans are properly coordinated including, but not limited to, contract documents, specifications, owner/contractor agreements, building and mechanical plans, private and public utilities, and other pertinent permits for construction. 3. Owner and Architect, are responsible for final design and location of buildings shown, including an area measured a minimum five (5) feet around any building and coordinating final utility connections shown on these plans. 4. Prior to using these plans for construction layout, the user shall contact TCE to ensure the plan contains the most current revisions. 5. These Drawings are specific to the Project and are not transferable. As instruments of service, these drawings, and copies thereof, furnished by TCE are its exclusive property.  Changes to the drawings may only be made by TCE. If errors or omissions are discovered, they shall be brought to the attention of TCE immediately. 6. It is the User's responsibility to ensure this copy contains the most current revisions. 0 Feet Graphic Scale 100 200 300 15°± VT G r i d M a g n e t i c   Overall Site Plan C2-01 06/18/2024 1" = 100' 22-512 SCR AAD      Hubbard Recreation & Natural Area Nowland Farm Road South Burlington, VT 1 06/14/24 AADZoning & Vegetation   LOCATION PLAN NTS SP E A R S T R E E T NOWLAND FARM RD DO R S E T S T R E E T VT G R I D ALLEN RD PROJECTSITE PROJECT INFORMATION: 1.OWNER OF RECORD: CITY OF SOUTH BURLINGTON 575 DORSET ST. SOUTH BURLINGTON, VERMONT 05403 2.TAX PARCEL ID: 1640-01600 3.PHYSICAL ADDRESS NOWLAND FARM ROAD OF PROPERTY:SOUTH BURLINGTON, VT 4.ZONING DISTRICTS:SEQ - NEIGHBORHOOD RES SEQ - NATURAL RESOURCE PROTECTION 5.PARCEL SIZE: 60.7± ACRES; 2,644,092 SF 6.IMPERVIOUS SURFACES:6.1.PARCEL # 1640-01600 (HUBBARD): EXISTING IMPERVIOUS (FOR REMOVAL) = 0.1 AC PROPOSED IMPERVIOUS = 0.49 AC 6.2.PARKSIDE DR ROW:PROPOSED IMPERVIOUS = 0.06 AC 6.3.WITHIN NOWLAND FARM RD:PROPOSED INCREASED IMPERVIOUS = 0.02 AC TOTAL PROJECT INCREASE IN IMPERVIOUS = 0.57 ACRES STORMWATER NOTE PER CORRESPONDENCE WITH THE VERMONT AGENCY OF NATURAL RESOURCES DEPARTMENT OF ENVIRONMENTAL CONSERVATION DATED APRIL 2023, THIS PROJECT ISBELOW THE THRESHOLD REQUIRING A STORMWATER OPERATION PERMIT THROUGH EXEMPTION 1.5.(F)(4) OF THE GENERAL PERMIT 3-9050. NE I G H B O R H O O D R E S I D E N T I A L NA T U R A L R E S O U R C E P R O T E C T I O N NA T U R A L R E S O U R C E P R O T E C T I O N NE I G H B O R H O O D R E S I D E N T I A L 2 07/01/24 JLAExisting vegetation to remain 3 08/05/2024 SCRPath Grading UP S W E P T L A N E REMOVE EX. CONCRETE SIDEWALK. CONTRUCT NEW CURB RAMPWITH DETECTABLE WARNING SURFACECLASS IIWETLAND CONCRETE SIDEWALKCONCRETE SIDEWALK CL I M A T E C H A N G E ST U D Y A R E A EXISTING SIGHTDISTANCE EASEMENT NEW CROSSWALK11+00 11+50 12+00 12+50 13+00 13+50 14+00 14+50 15+00 15+50 REMOVE EXISTING CONCRETESIDEWALK. CONSTRUCT NEW CURBRAMP AND DETECTABLE WARNINGSURFACE, GRADED EARTH STYLESEE DETAILNEW 10' WIDE SHARED USE PATH REMOVEEXISTINGBOARDWALK80' ROW BIKE RACKNEW 10' WIDE MOWED GRASS PATH PARKSIDE DREXISTING UTILITYEASEMENT394393393392 392391 391 391391390 390389 389 388 388388 SIGN:PEDESTRIAN CROSSING (W11-2)15" HDPE6' BENCHSTORMWATER DISCONNECTION AREA 0 Feet Graphic Scale 20 40 60 1 5 ° ± VT Grid Magnetic UPSWEPT LANE 1 07/01/24 JLAExisting vegetation to remain UP S W E P T L A N E REMOVE EX. CONCRETE SIDEWALK. CONTRUCT NEW CURB RAMPWITH DETECTABLE WARNING SURFACECLASS IIWETLAND CONCRETE SIDEWALKCONCRETE SIDEWALK CL I M A T E C H A N G E ST U D Y A R E A EXISTING SIGHTDISTANCE EASEMENT NEW CROSSWALK11+00 11+50 12+00 12+50 13+00 13+50 14+00 14+50 15+00 15+50 REMOVE EXISTING CONCRETESIDEWALK. CONSTRUCT NEW CURBRAMP AND DETECTABLE WARNINGSURFACE, GRADED EARTH STYLESEE DETAILNEW 10' WIDE SHARED USE PATH REMOVEEXISTINGBOARDWALK80' ROW BIKE RACKNEW 10' WIDE MOWED GRASS PATH PARKSIDE DREXISTING UTILITYEASEMENT394393393392 392391 391 391391390 390389 389 388 388388 SIGN:PEDESTRIAN CROSSING (W11-2)15" HDPE6' BENCHSTORMWATER DISCONNECTION AREA 0 Feet Graphic Scale 20 40 60 1 5 ° ± VT Grid Magnetic UPSWEPT LANE 1 07/01/24 JLAExisting vegetation to remain UP UP UP UP UP UP D G W W 394 394 3 9 4 394 394 3 9 4 394 39 4 393 393 39 3 393 393 393 393 3 9 3 39 3 3 9 2 392 39 2 39 2 392 392 392 392 39 2 392 392 392 392 39 2 392 392 39 2 3 9 2 39 1 391 39 1 39 1 391 391 391 3 9 1 391 391 391 391 3 9 1 391 391 39 1 391 391 391 391 390 390 390 39 0 390 39 0 390 390 390 390 390 3 9 0 390 390 3 9 0 390 3 9 0 390 390 390 390 390 3 9 0 389 389 389 389 3 8 9 389 389 389 389 389 389 389 38 9 38 9 3 8 9 389 389 389 389 3 8 9 3 8 9 388 38 8 388 388 388 388 388 388 388 38 8 388 38 8 388 3 8 8 38 8 3 8 8 388 388 388 388 38 8 387 387 387 387 387 387 387 387 387 387 3 8 7 38 7 3 8 7 387 387 387 38 7 3 8 7 387 386 386 386 38638 6 386 386 386 386 38 6 38 6 386 386 3863 8 6 386 3 8 6 385 385 385 385 3 8 5 385 385 385385 3 8 5 3 8 5 38 5 385 385 385 38 5 384 384 384384 384 3 8 4 384 384 384 384 3 8 4 38 4 384 384 384 3 8 4 383383 383 383 383 38 3 383 383 383 383 3 8 3 38 3 38 3 383 383 382 382 382 382 382 382 382 382 382 3 8 2 382 382 382 381 381 381 381 381 381 381 381 381 38 1 381 381 381 380 380 38 0 380 380 380 380 380 380 380 3 8 0 380 380 379 379 37 9 379 379 379 379 379 379 379 37 9 379 3 7 9 378378378 378 378 378 37 8 378378 3 7 8 378 377377 377 377377 377 377 377377 377 376 376 376 376 376 376 376 376 3 7 6 376 375 375 375 375 375 375 375 375 375 37 4 374 374 374 374 374 374 374 374 373 373 373 373 373 373 373 373 372 372 372372 372372372372 371 371 371371 371371371371370370370 370 370 370 3 7 0 370 3 7 0 369 369 369 369 369 369 369 3 6 9 368 36 8 368 368 368368368368 36 7 3 6 7 367 367 367367367367 366 366 366 366 366 366 3 6 6 3 6 6 3 6 6 365 365 365 365 365 365 36 5 36 5 365 364 3 6 4 3 6 4 364 364 364 364364364 3 6 3 3 6 3 3 6 3 363 363363 363 363 363 3 6 2 362 362 362 362 362 362 362 361 3 6 1 36 1 3 6 1 361 361 361361 360 3 6 0 360 360 360 360360 359 3 5 9 35 9 359 359 359 359 35 8 358 358 358 357 357 357 357 357 357 356 356 356 356 356 356 356 390 390 390 391 39 1 39 1 3 9 1 39 1 39 1 39 0 390 390 3 9 0 390 3 9 0 3 9 0 3 9 0 3 8 9 3 8 9 3 8 8 3 8 8 3 8 7 387 38 7 386 EX I S T I N G HO M E , TY P . D 50' A N R C L A S S I I W E T L A N D B U F F E R SPEAR S T R E E T UP S W E P T L A N E PINNACL E D R I V E TO S P E A R S T R E E T PARK S I D E D R X TREE TO BE REMOVED Sheet Title Project Title Use of These Drawings Scale: Project Number: Date: Drawn By: Project Engineer: Approved By: No. Description Date By Revisions No. 9020 CIVIL ABI G A I L A . D E R Y ST A T E O F VER M O N T P R O F E SSIONAL E N GI NEER L ICEN S E D Field Book: 1. Unless otherwise noted, these Drawings are intended for preliminary planning, coordination with other disciplines or utilities, and/or approval from the regulatory authorities.  They are not intended as construction drawings unless noted as such or marked approved by a regulatory authority. 2. By use of these drawings for construction of the Project, the Owner represents that they have reviewed, approved, and accepted the drawings, obtained all necessary permits, and have met with all applicable parties/disciplines, including but not limited to, the Engineer and the Architect, to insure these plans are properly coordinated including, but not limited to, contract documents, specifications, owner/contractor agreements, building and mechanical plans, private and public utilities, and other pertinent permits for construction. 3. Owner and Architect, are responsible for final design and location of buildings shown, including an area measured a minimum five (5) feet around any building and coordinating final utility connections shown on these plans. 4. Prior to using these plans for construction layout, the user shall contact TCE to ensure the plan contains the most current revisions. 5. These Drawings are specific to the Project and are not transferable. As instruments of service, these drawings, and copies thereof, furnished by TCE are its exclusive property.  Changes to the drawings may only be made by TCE. If errors or omissions are discovered, they shall be brought to the attention of TCE immediately. 6. It is the User's responsibility to ensure this copy contains the most current revisions. 0 Feet Graphic Scale 60 120 180 15 ° ± VT Grid Magnetic   Wetland Impact Plan C2-03 06/18/2024 1" = 60' 22-512 SCR AAD      Hubbard Recreation & Natural Area Nowland Farm Road South Burlington, VT 1 07/01/24 JLASize of Class III Wetland and Existing Vegetation   STATE WETLAND IMPACT KEY PROPOSED CLASS II WETLAND BUFFER IMPACT = 4,441 SF PROPOSED CLASS II WETLAND IMPACT = 283 SF PROPOSED CLASS III WETLAND IMPACT = 1,784 SF PROJECT LOCATION CLASS II WETLAND CLASS II WETLAND CLASS II WETLAND CLASS II WETLAND CLASS II WETLAND CLASS II WETLAND CLASS II WETLAND CLASS III WETLAND CLASS III WETLAND CLASS III WETLAND CLASS III WETLAND CLASS III WETLAND CLASS III WETLAND EXISTING CLASS II WETLAND BUFFER IMPACT PERMITTED UNDER INDIVIDUAL WETLAND PERMIT #2014-085 = 3,195 SF 6,064 SQUARE FEET 8,882 SQUARE FEET 1,142 SQUARE FEET 4,603 SQUARE FEET 7,258 SQUARE FEET 3,059 SQUARE FEET 2 08/05/2024 SCRPath Grading N O W L A N D F A R M R D SP E A R S T R E E T UPSWEPT LANE VA L E D R FO U R S I S T E R S RO A D PIN N A C L E D R I V E NOWLAND FARM RD TO SPEA R S T R E E T P A R K S I D E D R 390 390 U P UP UP D D EXISTING HOME, TYP. N O W L A N D F A R M R D SP E A R S T R E E T VA L E D R PIN N A C L E D R I V E NOWLAND FARM RD TO SPEA R S T R E E T UPSWEPT LANE P A R K S I D E D R S/N 001 Sheet Title Project Title Use of These Drawings Scale: Project Number: Date: Drawn By: Project Engineer: Approved By: No. Description Date By Revisions No. 9020 CIVIL ABI G A I L A . D E R Y ST A T E O F VER M O N T P R O F E SSIONAL E N GI NEER L ICEN S E D Field Book: 1. Unless otherwise noted, these Drawings are intended for preliminary planning, coordination with other disciplines or utilities, and/or approval from the regulatory authorities.  They are not intended as construction drawings unless noted as such or marked approved by a regulatory authority. 2. By use of these drawings for construction of the Project, the Owner represents that they have reviewed, approved, and accepted the drawings, obtained all necessary permits, and have met with all applicable parties/disciplines, including but not limited to, the Engineer and the Architect, to insure these plans are properly coordinated including, but not limited to, contract documents, specifications, owner/contractor agreements, building and mechanical plans, private and public utilities, and other pertinent permits for construction. 3. Owner and Architect, are responsible for final design and location of buildings shown, including an area measured a minimum five (5) feet around any building and coordinating final utility connections shown on these plans. 4. Prior to using these plans for construction layout, the user shall contact TCE to ensure the plan contains the most current revisions. 5. These Drawings are specific to the Project and are not transferable. As instruments of service, these drawings, and copies thereof, furnished by TCE are its exclusive property.  Changes to the drawings may only be made by TCE. If errors or omissions are discovered, they shall be brought to the attention of TCE immediately. 6. It is the User's responsibility to ensure this copy contains the most current revisions. 0 Feet Graphic Scale 100 200 300 15°± VT G r i d Ma g n e t i c   Stormwater Overview Plan C4-01 08/05/2024 1" = 100' 22-512 SCR AAD      Hubbard Recreation & Natural Area Nowland Farm Road South Burlington, VT   STORMWATER LEGEND NEW IMPERVIOUS IN NOWLAND FARM RD RIGHT-OF-WAY = 926 SF NEW IMPERVIOUS ON HUBBARD PARCEL = 21,523 SF = 0.494 AC NEW IMPERVIOUS IN UPSWEPT ROW = 2,583 SF DESIGNATED STORMWATER DISCONNECTION AREAS TOTAL IMPERVIOUS = 25,032 SF OR 0.57 ACRES DRAINAGE AREA TIME OF CONCENTRATION 1S Post Development SN001 SN 001 Routing Diagram for 22-512 Post Development Prepared by Bowman Consulting Group, Printed 8/2/2024 HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Subcat Reach Pond Link 22-512 Post Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 2HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 0.510 98 Unconnected pavement, HSG D (1S) 40.210 82 Woods/grass comb., Fair, HSG D (1S) 40.720 82 TOTAL AREA Type II 24-hr WQv Rainfall=1.00"22-512 Post Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 3HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post Development Runoff =1.70 cfs @ 12.59 hrs, Volume=0.387 af, Depth= 0.11" Routed to Link SN001 : SN 001 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr WQv Rainfall=1.00" Area (ac) CN Description 40.210 82 Woods/grass comb., Fair, HSG D 0.510 98 Unconnected pavement, HSG D 40.720 82 Weighted Average 40.210 98.75% Pervious Area 0.510 1.25% Impervious Area 0.510 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet)(ft/ft) (ft/sec)(cfs) 44.8 2,005 0.0135 0.75 Lag/CN Method, Subcatchment 1S: Post Development Runoff Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 1 0 Type II 24-hr WQv Rainfall=1.00" Runoff Area=40.720 ac Runoff Volume=0.387 af Runoff Depth=0.11" Flow Length=2,005' Slope=0.0135 '/' Tc=44.8 min CN=82 1.70 cfs Type II 24-hr WQv Rainfall=1.00"22-512 Post Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 4HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Link SN001: SN 001 Inflow Area =40.720 ac, 1.25% Impervious, Inflow Depth = 0.11" for WQv event Inflow =1.70 cfs @ 12.59 hrs, Volume=0.387 af Primary =1.70 cfs @ 12.59 hrs, Volume=0.387 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Link SN001: SN 001 Inflow Primary Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 1 0 Inflow Area=40.720 ac 1.70 cfs 1.70 cfs Type II 24-hr 1 YR Rainfall=1.89"22-512 Post Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 5HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post Development Runoff =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Depth= 0.58" Routed to Link SN001 : SN 001 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=1.89" Area (ac) CN Description 40.210 82 Woods/grass comb., Fair, HSG D 0.510 98 Unconnected pavement, HSG D 40.720 82 Weighted Average 40.210 98.75% Pervious Area 0.510 1.25% Impervious Area 0.510 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet)(ft/ft) (ft/sec)(cfs) 44.8 2,005 0.0135 0.75 Lag/CN Method, Subcatchment 1S: Post Development Runoff Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 1 YR Rainfall=1.89" Runoff Area=40.720 ac Runoff Volume=1.959 af Runoff Depth=0.58" Flow Length=2,005' Slope=0.0135 '/' Tc=44.8 min CN=82 14.02 cfs Type II 24-hr 1 YR Rainfall=1.89"22-512 Post Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 6HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Link SN001: SN 001 Inflow Area =40.720 ac, 1.25% Impervious, Inflow Depth = 0.58" for 1 YR event Inflow =14.02 cfs @ 12.47 hrs, Volume=1.959 af Primary =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Link SN001: SN 001 Inflow Primary Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=40.720 ac 14.02 cfs 14.02 cfs Type II 24-hr 25 YR Rainfall=1.89"22-512 Post Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 7HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Post Development Runoff =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Depth= 0.58" Routed to Link SN001 : SN 001 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 25 YR Rainfall=1.89" Area (ac) CN Description 40.210 82 Woods/grass comb., Fair, HSG D 0.510 98 Unconnected pavement, HSG D 40.720 82 Weighted Average 40.210 98.75% Pervious Area 0.510 1.25% Impervious Area 0.510 100.00% Unconnected Tc Length Slope Velocity Capacity Description (min) (feet)(ft/ft) (ft/sec)(cfs) 44.8 2,005 0.0135 0.75 Lag/CN Method, Subcatchment 1S: Post Development Runoff Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 25 YR Rainfall=1.89" Runoff Area=40.720 ac Runoff Volume=1.959 af Runoff Depth=0.58" Flow Length=2,005' Slope=0.0135 '/' Tc=44.8 min CN=82 14.02 cfs Type II 24-hr 25 YR Rainfall=1.89"22-512 Post Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 8HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Link SN001: SN 001 Inflow Area =40.720 ac, 1.25% Impervious, Inflow Depth = 0.58" for 25 YR event Inflow =14.02 cfs @ 12.47 hrs, Volume=1.959 af Primary =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Link SN001: SN 001 Inflow Primary Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=40.720 ac 14.02 cfs 14.02 cfs 1S Pre Development SN001 SN 001 Routing Diagram for 22-512 Pre Development Prepared by Bowman Consulting Group, Printed 8/2/2024 HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Subcat Reach Pond Link 22-512 Pre Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 2HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Area Listing (all nodes) Area (acres) CN Description (subcatchment-numbers) 40.720 82 Woods/grass comb., Fair, HSG D (1S) 40.720 82 TOTAL AREA Type II 24-hr WQv Rainfall=1.00"22-512 Pre Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 3HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Pre Development Runoff =1.70 cfs @ 12.59 hrs, Volume=0.387 af, Depth= 0.11" Routed to Link SN001 : SN 001 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr WQv Rainfall=1.00" Area (ac) CN Description 40.720 82 Woods/grass comb., Fair, HSG D 40.720 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet)(ft/ft) (ft/sec)(cfs) 44.8 2,005 0.0135 0.75 Lag/CN Method, Subcatchment 1S: Pre Development Runoff Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 1 0 Type II 24-hr WQv Rainfall=1.00" Runoff Area=40.720 ac Runoff Volume=0.387 af Runoff Depth=0.11" Flow Length=2,005' Slope=0.0135 '/' Tc=44.8 min CN=82 1.70 cfs Type II 24-hr WQv Rainfall=1.00"22-512 Pre Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 4HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Link SN001: SN 001 Inflow Area =40.720 ac, 0.00% Impervious, Inflow Depth = 0.11" for WQv event Inflow =1.70 cfs @ 12.59 hrs, Volume=0.387 af Primary =1.70 cfs @ 12.59 hrs, Volume=0.387 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Link SN001: SN 001 Inflow Primary Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 1 0 Inflow Area=40.720 ac 1.70 cfs 1.70 cfs Type II 24-hr 1 YR Rainfall=1.89"22-512 Pre Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 5HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Pre Development Runoff =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Depth= 0.58" Routed to Link SN001 : SN 001 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 1 YR Rainfall=1.89" Area (ac) CN Description 40.720 82 Woods/grass comb., Fair, HSG D 40.720 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet)(ft/ft) (ft/sec)(cfs) 44.8 2,005 0.0135 0.75 Lag/CN Method, Subcatchment 1S: Pre Development Runoff Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 1 YR Rainfall=1.89" Runoff Area=40.720 ac Runoff Volume=1.959 af Runoff Depth=0.58" Flow Length=2,005' Slope=0.0135 '/' Tc=44.8 min CN=82 14.02 cfs Type II 24-hr 1 YR Rainfall=1.89"22-512 Pre Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 6HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Link SN001: SN 001 Inflow Area =40.720 ac, 0.00% Impervious, Inflow Depth = 0.58" for 1 YR event Inflow =14.02 cfs @ 12.47 hrs, Volume=1.959 af Primary =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Link SN001: SN 001 Inflow Primary Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=40.720 ac 14.02 cfs 14.02 cfs Type II 24-hr 25 YR Rainfall=1.89"22-512 Pre Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 7HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Subcatchment 1S: Pre Development Runoff =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Depth= 0.58" Routed to Link SN001 : SN 001 Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Type II 24-hr 25 YR Rainfall=1.89" Area (ac) CN Description 40.720 82 Woods/grass comb., Fair, HSG D 40.720 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet)(ft/ft) (ft/sec)(cfs) 44.8 2,005 0.0135 0.75 Lag/CN Method, Subcatchment 1S: Pre Development Runoff Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Fl o w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Type II 24-hr 25 YR Rainfall=1.89" Runoff Area=40.720 ac Runoff Volume=1.959 af Runoff Depth=0.58" Flow Length=2,005' Slope=0.0135 '/' Tc=44.8 min CN=82 14.02 cfs Type II 24-hr 25 YR Rainfall=1.89"22-512 Pre Development Printed 8/2/2024Prepared by Bowman Consulting Group Page 8HydroCAD® 10.20-4b s/n 02145 © 2023 HydroCAD Software Solutions LLC Summary for Link SN001: SN 001 Inflow Area =40.720 ac, 0.00% Impervious, Inflow Depth = 0.58" for 25 YR event Inflow =14.02 cfs @ 12.47 hrs, Volume=1.959 af Primary =14.02 cfs @ 12.47 hrs, Volume=1.959 af, Atten= 0%, Lag= 0.0 min Primary outflow = Inflow, Time Span= 0.00-36.00 hrs, dt= 0.05 hrs Link SN001: SN 001 Inflow Primary Hydrograph Time (hours) 3635343332313029282726252423222120191817161514131211109876543210 Flo w ( c f s ) 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Inflow Area=40.720 ac 14.02 cfs 14.02 cfs 1 Marla Keene From:F Delwich <delwich.f@gmail.com> Sent:Friday, August 2, 2024 2:54 PM To:Marla Keene Subject:EXTERNAL: Email for Development Review Board Aug 6 meeting This message has originated from an External Source. Please use proper judgment and cauƟon when opening aƩachments, clicking links, or responding to this email. Dear Marla Keene, I am wriƟng to request that you please forward the following email to the members of the City of South Burlington Development Review Board in advance of their August 6, 2024 meeƟng. This email is in response to the proposed development plan for the Hubbard RecreaƟon & Natural Area, located 2 blocks east of the juncƟon of Nowland Farm Road and Spear Street in South Burlington, which is slated for discussion at the August 6th meeƟng (Item #6: SP 24-26 project at 124 Nowland Farm Road). Thank you, Frances Delwiche South Burlington, VT 05403 (802) 652-1434 *************************************** Dear Members of the South Burlington Development Review Board: I am wriƟng to voice my strong opposiƟon to the plans to develop the Hubbard RecreaƟon & Natural Area by creaƟng a paved bike path and paved/lit parking lot. I am deeply concerned about the effect such development would have on the environment, and by extension, on the health and welfare of the residents of South Burlington. I am concerned not only because the Hubbard land is uniquely valuable as a buffer against climate change, but in parƟcular because it is known to be a habitat for nesƟng Bobolinks. The Bobolink is a small grassland songbird related to blackbirds, meadowlarks, and orioles. The male is known for his cheerful, bubbly song given in flight, and for his disƟncƟve plumage which is oŌen described as a “bird with his tuxedo on backwards”. Bobolinks are unique in their predilecƟon for nesƟng in undisturbed, open fallow fields and meadows, exactly the type of habitat which presently exists at the Hubbard property. Numerous Ebird reports for this year show that there were at least 3 nesƟng pairs on the property, and likely several more. As recently as July 29, 2024, an EBird checklist showed the presence of 6 Bobolinks there. Those of you who have lived in this area for any length of Ɵme probably already know a lot about Bobolinks. That’s because a number of years ago, Bobolinks were widely covered in the local news, both on radio and TV, and in the print media. This was due to recent research conducted by scienƟsts at UVM and elsewhere in New England that showed their numbers to have fallen precipitously in recent decades due to loss of habitat and to intensified agricultural pracƟces. 2 When Bobolink habitat is lost to development, whether for housing or for a city park, the birds are forced to search for other suitable locaƟons. When that occurs frequently enough and over a large enough geographic area, there may ulƟmately be insufficient habitat leŌ to sustain the species. But even where suitable habitat does sƟll exist, early and frequent mowing for hay will spell doom for Bobolink nestlings and fledgelings not yet able to survive on their own. Despite the widespread media coverage, I am deeply concerned that not enough care and aƩenƟon was given to the presence of Bobolinks and other wildlife when plans for development at Hubbard were made. Therefore, I would like to request that all development plans for the Hubbard property be halted immediately, so that the current City Council can re-examine the project and all its implicaƟons, including the survival of the resident Bobolinks. I believe that with thoughƞul and respecƞul consideraƟon of all perspecƟves that we as a city can come up with a soluƟon for Hubbard that will both benefit the residents of South Burlington, and enable the Bobolinks to conƟnue to thrive and raise their young there. I urge the DRB not to be hasty in making a decision on this property, but instead to take whatever Ɵme is required to best manage this criƟcal natural resource. Sincerely, Frances Delwiche South Burlington, VT 05403 1 Marla Keene From:Rosanne Greco <rosanne05403@aol.com> Sent:Thursday, August 1, 2024 8:56 PM To:Marla Keene Cc:Janet Bellava; John Bossange; Rosanne Greco; Julian Keenan; Fran MacDonald; Michael Mittag; Karen Ryder; Allan Strong; Carol McQuillen Subject:EXTERNAL: SBLT comment on the Hubbard project This message has originated from an External Source. Please use proper judgment and caution when opening attachments, clicking links, or responding to this email. Dear Marla, Would you please send the below email to all DRB members. It is a comment regarding agenda item #6: SP 24-26 project at 124 Nowland Farm Rd (Hubbard) that will come before the DRB at their 6 August 2024 meeting. Thank you. Rosanne ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Dear Members of the Development Review Board, On behalf of the Board of Directors of the South Burlington Land Trust (copied) I write to respectfully request that you do not approve the City’s plan for the Hubbard Natural and Recreation area as it is currently presented. We are requesting this for a number of reasons. First is because of our concern for the damage or destruction this plan will do to the soils on Hubbard. Given the severe impacts that Vermont farms have experienced from flooding events, Vermont, in particular Chittenden County, is being forced to look for higher ground to grow crops. Fortunately, Hubbard is on higher ground and contains high quality soils. Over the past years, the soils have been made more fertile through the efforts of Common Roots, who have grown hundreds of pounds of organic produce on the Hubbard lands much of which they donate to needy families and to the South Burlington Food Shelf. Putting impermeable surfaces on this land will impact the soil on and around the farm. The proposed City plan for Hubbard involves paving over with impermeable materials a bike road through the center of the land area, and paving over other grassy areas for a parking lot. There are plenty of examples of bike paths in other places that do not use impermeable surfaces. A well constructed hard-packed gravel path for bicycles is not more expensive than a paved path and is equally usable in all seasons. Additionally, asphalt which absorbs heat from the sun, will make walking through this area less desirable in hot weather and will increase the heat significantly. 2 Moreover, asphalt restricts rain from being absorbed by the soil and will add to the runoff going into Monroe Brook. All South Burlington watersheds are currently listed as impaired; and adding asphalt will hinder the City from achieving its goal, as stated in the 2024 City Plan, of having no impaired watersheds by 2033. There is no need to enlarge the existing gravel parking lot, much less make it an asphalt one. For over ten years, people have parked their cars on the grass, and then after the City poured gravel over this, on the gravel area. Except for a handful of special events, there have rarely been more than 5-6 cars parked on Hubbard at any one time. Therefore, we strongly encourage you to totally reject enlarging and paving the parking area. At a minimum, to verify whether there is a true need for a larger parking area, the City should conduct a parking study to determine whether enlarging this parking area is needed or wise. We are quite concerned about the impact of this project on the wildlife and birds who live, hunt, and nest on the Hubbard lands. The Hubbard meadow and wooded area are wildlife corridors, one of the last remaining major wildlife corridors in the city. Neighbors and visitors have taken hundreds of photos and videos of wildlife on or near these lands. Others have spotted Bobolinks, a Species of Greatest Conservation Need in Vermont, on the Hubbard meadows. The City project will disturb, if not destroy, the wildlife and bird habitats. The South Burlington Climate Action Plan advocates that we “protect our remaining meadows, forests, grasslands and farmlands from further encroachment…” The Hubbard land contains all of the natural resources specifically mentioned in the Climate Action Plan in need of protection; and yet the current City plan encroaches on these vital natural resources. Lastly, the Hubbard land was purchased by the City using Open Space funds, which were intended by the voters to be used to conserve open lands. Pavement on open lands runs counter to the intent and purpose of the fund. Turning natural resource lands into parks with pavement for cars and other motorized vehicles does the same thing. The South Burlington Land Trust Board of Directors requests that you send this plan back to the City Council so that they can reassess it in light of the recent (and recurring) weather disasters we are experiencing. Climate change impacts make protecting our open lands all the more critical. Thank you for your consideration of our request. Rosanne Greco President, South Burlington Land Trust