Rainfall Impacts in Lake County

Lake County has been experiencing more frequent and stronger rainfall events. Recently, the Illinois State Water Survey released updated statistical rainfall data for Bulletin 70--Frequency Distributions of Heavy Precipitation in Illinois. This new data impacts not only the residents and business owners of Lake County, but also public and private development projects. SMC will be making revisions to the Watershed Development Ordinance (WDO), a countywide ordinance that sets forth minimum requirements for the stormwater management aspects of development within Lake County  

Watershed Development Ordinance Timeline Highlights 

WDO Timeline

Increased Rainfall Public Information Meetings

SMC will be presenting the increased rainfall data along with a timeline of the regulatory process, provide resources and tools for best practices, and discuss stormwater-related issues and concerns from the audience. Both meetings will provide the same information. Members of the public, stakeholders, and individuals with an interest in hearing more about how rainfall affects Lake County are encouraged to attend.

Public Meeting 1:

Date: Tuesday, July 16, 2019

Time: 2 p.m.-4 p.m.

Location: 
The City of Highland Park Council Chambers
2nd floor of City Hall
1707 St Johns Ave
Highland Park, IL 60035

Public Meeting 2:

Date: Wednesday, July 24, 2019

Time: 10 a.m.

Location: 
Barrington Village Hall
Board Room (located upstairs)
200 S. Hough Street
Barrington, IL 60010

Public Meeting 3:

State Representative Sam Yingling and Lake County Board Member Terry Wilke are hosting a floodproofing and rainfall information meeting where SMC will be the presenting agency. 

Date: Thursday, Aug. 8, 2019

Time: 6 p.m.-8 p.m.

Location:
Round Lake High School
Theater 
800 High School Drive
Round Lake, IL 60073

Upper Des Plaines Inundation Stage vs Year Flood   

The Upper Des Plaines River inundation map prepared by the Illinois Office of Water Resources breaks the River up into three sections corresponding to the USGS river gages: Russell, Gurnee/Route 120 and Lincolnshire. The inundation map has a slider for river stage. River stage is the depth of water above the gage datum which is somewhere below the typical lowest river level anticipated. This table compares the “Year Flood” to the stage at each of the gage locations to give an idea of how significant a given stage is. For example, a “100-year” flood at the Russell gage is at a Stage of 14.


Approximate Stage


Year flood

Russell

Gurnee

Lincolnshire

10

10

11

16

50

13

14

17

100

14

15

18

500

15

16

19