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 91

  Pond EX RCVR: EX RCVR
  Hydrograph

  Inflow
  0.87 cfs  Primary
  0.95  0.87 cfs
  0.9
  0.85
  Inflow Area=0.500 ac
  0.8
  0.75
  Peak Elev=900.21'
  0.7  12.0"
  0.65
  0.6  Round Culvert
  Flow (cfs)

  0.55
  0.5  n=0.013
  0.45
  0.4  L=121.0'
  0.35
  0.3  S=0.0031 '/'
  0.25
  0.2
  0.15
  0.1
  0.05
  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)