STORMWATER MASTER PLAN Prepared for CITY OF DES PLAINES 1420 MINER STREET DES PLAINES, IL 60016 July 2003 CBBEL Project No. 02-73 TABLE OF CONTENTS Page # LIST OF TABLES ................................................................................................... v LIST OF EXHIBITS ................................................................................................. vi LIST OF APPENDICES ......................................................................................... vii EXECUTIVE SUMMARY ....................................................................... ES-1 – ES-4 INTRODUCTION ..................................................................................................... 1 FLOODING PROBLEM INVENTORY AND ASSESSMENT .................................... 1 PROBLEM AREA #1 ..................................................................................... 4 Location .............................................................................................. 4 Flood Protection Questionnaire .......................................................... 4 Existing Drainage Pattern ................................................................... 6 Drainage Problem............................................................................... 6 Drainage Problem Causes ................................................................. 6 PROBLEM AREA #2 ..................................................................................... 7 Location .............................................................................................. 7 Flood Protection Questionnaire .......................................................... 7 Existing Drainage Pattern ................................................................... 9 Drainage Problem............................................................................. 10 Drainage Problem Causes ............................................................... 10 PROBLEM AREA #3 ................................................................................... 11 Location ............................................................................................ 11 Flood Protection Questionnaire ........................................................ 11 Existing Drainage Pattern ................................................................. 12 Drainage Problem............................................................................. 12 Drainage Problem Causes ............................................................... 12 PROBLEM AREA #4 ................................................................................... 14 Location ............................................................................................ 14 Flood Protection Questionnaire ........................................................ 14 Existing Drainage Pattern ................................................................. 15 Drainage Problem............................................................................. 15 Drainage Problem Causes ............................................................... 15 PROBLEM AREA #5 ................................................................................... 17 Location ............................................................................................ 17 Flood Protection Questionnaire ........................................................ 17 Existing Drainage Pattern ................................................................. 19 Drainage Problem............................................................................. 19 Drainage Problem Causes ............................................................... 19 Christopher B. Burke Engineering, Ltd. City of Des Plaines Stormwater Master Plan i PROBLEM AREA #6 ................................................................................... 20 Location ............................................................................................ 20 Flood Protection Questionnaire ........................................................ 20 Existing Drainage Pattern ................................................................. 22 Drainage Problem............................................................................. 22 Drainage Problem Causes ............................................................... 22 PROBLEM AREA #7 ................................................................................... 23 Location ............................................................................................ 23 Flood Protection Questionnaire ........................................................ 23 Existing Drainage Pattern ................................................................. 25 Drainage Problem............................................................................. 25 Drainage Problem Causes ............................................................... 25 PROBLEM AREA #8 ................................................................................... 26 Location ............................................................................................ 26 Flood Protection Questionnaire ........................................................ 26 Existing Drainage Pattern ................................................................. 28 Drainage Problem............................................................................. 28 Drainage Problem Causes ............................................................... 28 PROBLEM AREA #9 ................................................................................... 29 Location ............................................................................................ 29 Flood Protection Questionnaire ........................................................ 29 Existing Drainage Pattern ................................................................. 31 Drainage Problem............................................................................. 31 Drainage Problem Causes ............................................................... 31 PROBLEM AREA #10 ................................................................................. 32 Location ........................................................................................... 32 Flood Protection Questionnaire ........................................................ 32 Existing Drainage Pattern ................................................................. 33 Drainage Problem............................................................................. 33 Drainage Problem Causes ............................................................... 33 PROBLEM AREA #11 ................................................................................. 35 Location ............................................................................................ 35 Flood Protection Questionnaire ........................................................ 35 Existing Drainage Pattern ................................................................. 37 Drainage Problem............................................................................. 37 Drainage Problem Causes ............................................................... 37 PROBLEM AREA #12 ................................................................................. 38 Location ............................................................................................ 38 Flood Protection Questionnaire ........................................................ 40 Existing Drainage Pattern ................................................................. 40 Drainage Problem............................................................................. 40 Drainage Problem Causes ............................................................... 40 Christopher B. Burke Engineering, Ltd. City of Des Plaines Stormwater Master Plan ii FLOOD MITIGATION PROJECT ANALYSIS ........................................................ 41 STORM EVENTS SIMULATED ............................................................................. 41 Design Storm Event .......................................................................... 41 October 13, 2001 Storm Event ......................................................... 41 HYDROLOGIC AND HYDRAULIC MODELING..................................................... 41 PROBLEM AREA #1 ................................................................................... 43 Watershed Description ..................................................................... 43 Existing Condition Analysis .............................................................. 44 Flood Mitigation Project Analysis ...................................................... 44 Summary .......................................................................................... 45 PROBLEM AREA #2 ................................................................................... 47 Watershed Description ..................................................................... 47 Existing Condition Analysis .............................................................. 48 Flood Mitigation Project Analysis ...................................................... 48 Summary .......................................................................................... 51 PROBLEM AREA #3 ................................................................................... 52 Watershed Description ....................................................................