5A.-ENGINEER'S REPORT

Government: Town of Aurora
Board: Town Board
Meeting: Feb 4, 2026
Kind: Other
Topics: Water, sewer and drainage, Zoning and land use, Public safety

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WNY-2500056.00_HydroCAD  extreme_precip_tables_output (29) 24-hr S1 10-yr Rainfall=3.14"
Prepared by Greenman-Pedersen, Inc  Printed 12/18/2025
HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC  Page 111

  Pond RCVR 4: RCVR 4
  Hydrograph

  Inflow
  0.34  0.31 cfs  Primary
  0.31 cfs
  0.32
  0.3
  Inflow Area=0.080 ac
  0.28  Peak Elev=901.64'
  0.26
  0.24  8.0"
  0.22
  0.2
  Round Culvert
  Flow (cfs)

  0.18  n=0.013
  0.16
  0.14  L=22.0'
  0.12
  0.1
  S=0.0041 '/'
  0.08
  0.06
  0.04
  0.02
  0
  0  1  2  3  4  5  6  7  8  9  10  11 12 13 14  15  16  17  18  19  20 21  22  23  24
  Time (hours)