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

Download our archived copy (PDF, 9.6 MB, saved Oct 21, 2026)
View on the publisher's website (may have moved or changed since)

Same meeting

Text · page 53 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 25-yr Rainfall=3.85"
Prepared by Greenman-Pedersen, Inc  Printed 12/18/2025
HydroCAD® 10.20-7a s/n 04560 © 2025 HydroCAD Software Solutions LLC  Page 44

  Subcatchment ASP: Area to Southern Property
  Hydrograph

  Runoff
  0.3  0.28 cfs
  0.28  extreme_precip_tables_output (29) 24-hr S1 25-yr
  Rainfall=3.85"
  0.26
  Runoff Area=0.170 ac
  0.24  Runoff Volume=0.027 af
  Runoff Depth>1.91"
  0.22
  Flow Length=135'
  0.2  Slope=0.0138 '/'
  Tc=25.4 min
  0.18  CN=80
  Flow (cfs)

  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)