Southtowns Record

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

Original document

Same meeting

Text · page 28 of 351

Read the whole document on one page (all 351 pages, each with its own heading)

WNY-2500056.00_HydroCAD  extreme_precip_tables_output (29) 24-hr S1 1-yr Rainfall=1.88"
Prepared by Greenman-Pedersen, Inc  Printed 12/18/2025
HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC  Page 19

  Summary for Link PRE: Pre-Development

Inflow Area =  0.690 ac, 20.29% Impervious, Inflow Depth > 0.69" for 1-yr event
Inflow  =  0.45 cfs @ 12.07 hrs, Volume=  0.040 af
Primary  =  0.45 cfs @ 12.07 hrs, Volume=  0.040 af, Atten= 0%, Lag= 0.0 min

Primary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.05 hrs

  Link PRE: Pre-Development
  Hydrograph

  Inflow
  0.5  0.45 cfs  Primary
  0.48  0.45 cfs
  0.46
  0.44
  Inflow Area=0.690 ac
  0.42
  0.4
  0.38
  0.36
  0.34
  0.32
  0.3
  Flow (cfs)

  0.28
  0.26
  0.24
  0.22
  0.2
  0.18
  0.16
  0.14
  0.12
  0.1
  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)