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 844 of 1493

Read the whole document on one page (all 1493 pages, each with its own heading)

23-4121 storm calcs - Proposed  Type II 24-hr 100-Year Rainfall=5.23"
Prepared by Carmina Wood Design  Printed 5/14/2026
HydroCAD® 10.20-8a s/n 05019 © 2025 HydroCAD Software Solutions LLC  Page 35

  Subcatchment 2S: Proposed - South
  Hydrograph

  Runoff
  10  9.33 cfs
  9  Type II 24-hr
  8
  100-Year Rainfall=5.23"
  Runoff Area=93,939 sf
  7
  Runoff Volume=31,254 cf
  6
  Flow (cfs)

  Runoff Depth=3.99"
  5
  Flow Length=627'
  4  Tc=19.8 min
  3  CN=89
  2

  1

  0
  5  10  15  20  25  30  35  40  45  50  55  60  65  70
  Time (hours)

  Page 844 of 1493