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 252 of 1493

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E_App E_Post-Development Model  NY-West Seneca 24-hr S1 100-yr Rainfall=5.22"
Prepared by Labella Associates  Printed 4/20/2026
HydroCAD® 10.20-7a s/n 09581 © 2025 HydroCAD Software Solutions LLC  Page 52

  Summary for Reach DP-1: Design Point

Inflow Area =  11.074 ac, 26.79% Impervious, Inflow Depth = 3.58" for 100-yr event
Inflow  =  31.66 cfs @ 12.12 hrs, Volume=  3.307 af
Outflow  =  31.66 cfs @ 12.12 hrs, Volume=  3.307 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
  31.66 cfs  Outflow
  34  31.66 cfs
  32  Inflow Area=11.074 ac
  30
  28
  26
  24
  22
  Flow (cfs)

  20
  18
  16
  14
  12
  10
  8
  6
  4
  2
  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 252 of 1493