Southtowns Record

PBA07.09.2026packet

Government
Town of West Seneca
Board
Planning Board
Meeting
Jul 9, 2026, 6:00 p.m.
Posted by publisher
Jul 9, 2026
Kind
Agenda packet
Topics
Water, sewer and drainage, Housing, Zoning and land use, Roads and traffic, Parks and recreation, Budget and taxes, Public safety

Original document

Same meeting

Text · page 233 of 1493

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E_App E_Post-Development Model  NY-West Seneca 24-hr S1 10-yr Rainfall=3.14"
Prepared by Labella Associates  Printed 4/20/2026
HydroCAD® 10.20-7a s/n 09581 © 2025 HydroCAD Software Solutions LLC  Page 33

  Summary for Reach DP-1: Design Point

Inflow Area =  11.074 ac, 26.79% Impervious, Inflow Depth = 1.75" for 10-yr event
Inflow  =  13.96 cfs @ 12.15 hrs, Volume=  1.615 af
Outflow  =  13.96 cfs @ 12.15 hrs, Volume=  1.615 af, Atten= 0%, Lag= 0.0 min

Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs

  Reach DP-1: Design Point
  Hydrograph

  Inflow
  13.96 cfs  Outflow
  15  13.96 cfs
  14  Inflow Area=11.074 ac
  13
  12
  11
  10
  9
  Flow (cfs)

  8
  7
  6
  5
  4
  3
  2
  1
  0
  0 2 4  6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
  Time (hours)

  Page 233 of 1493