Overview

2023 Infrastructure Improvements is a 10-year capital improvement program that will address improving the Village’s infrastructure, particularly water and sewer systems.
The primary goals are to:

  • reduce surcharge of sanitary sewers into basements, streets, and Lake Michigan due to flooding, and
  • improve the water distribution system.

Infrastructure improvement projects will be completed in three phases.  Phase 1 of 3 is scheduled to be completed during the 2014-2015 construction seasons and will include construction of new storm sewers, new larger water mains to improve pressure and establish a new water interconnect with pumping stations. Phase 1 is anticipated to cost approximately $9.75 million and is funded by Capital Bonds.

Background

After several years of planning and multiple engineering studies, we have begun to implement the Kenilworth 2023 Infrastructure Improvement Program – a 10-year plan to address necessary repairs and improvements to our sewer, water and roadway infrastructure.  It has taken much effort and countless hours of research to reach this point, but the benefits of our efforts are finally within sight.

Our efforts in phase one of the KW2023 program were focused in two primary areas, flooding relief and water pressure improvements.  For the water improvements, construction commenced in early April on installation of new 12” water mains on Roger, Brier and Melrose.  The new water mains are expected to improve water pressure and flow in the area and improve the effectiveness of our fire hydrants.  Residents in the area will benefit from the improvements by July 3rd if all goes according to schedule.

The second focus of our KW2023 program has been on addressing the long-standing problems with sewage surcharging into our basements, streets and Lake Michigan during periods of moderate to heavy rain storms.  After nearly a year of research, design and public meetings we identified a plan to address flooding both now and for the future.

Click for additional information on:
WATER IMPROVEMENTS or SEWER IMPROVEMENTS

Village-wide Drainage Study

A Village-wide drainage study conducted in 2010 indicated that a system of deep, large diameter storm sewers would be needed to remove stormwater from the surcharged combined sewer to reduce flooding. Although this solution may reduce localized flooding, this approach simply moves the problem downstream without improving the stormwater quality. The Sheridan Road Interceptor will continue to surcharge and dump untreated water into Lake Michigan. A better approach is to slow down stormwater runoff and treat it at the source. Stormwater runoff can be retained and treated at the individual street level, reducing stormwater velocity, reducing necessary sewer sizes, and improving water quality—which will ultimately allow the Village to disconnect from the often-surcharged sewer interceptor and discharge clean stormwater to Lake Michigan. To achieve this, a different approach needs to be taken with regards to roadway construction and parkway grading. The Village is considering several “green” improvements to accomplish these goals including a permeable pavement system and bio-infiltration in the parkways.

Green Improvement Techniques Under Consideration

Permeable Pavement System

permeable paversPermeable pavement materials include permeable interlocking concrete pavers, pervious concrete, or porous asphalt.  These systems allow rainwater to flow through the pavement surface into the underlying stone base and soil.  The water moves slowly through the underground layers where it is cleansed, and infiltrated into the ground.  Excess water caused by significant storm events is captured by underdrains leading to a storm sewer.  Permeable pavement systems reduce runoff and roadway ponding, and slow water down – improving the quality of discharge and reducing the quantity.In addition, permeable pavers offer the opportunity to help make the streets in Kenilworth unique by offering a wide variety of colors and styles.

Bio-infiltration

Bio-infiltration refers to many different applications; however, rain gardens and swales are the most common and appropriate measures for use in the parkways.  Both are depressed  areas approximately 12” to 18” deep, located between the sidewalk and the curb.  The sides are gradually sloped toward the bio-infiltration area so it will remain aesthetically pleasing.

The bio-infiltration basins consist of grass or mulch on engineered soil (mixture of sand and compost to increase permeability) over a stone base with an underdrain system to encourage infiltration and filtration without allowing the water to pond for extended periods of time.

Rain Gardens

Raingarden

Rain gardens contain mulch and native vegetation, including flowers and prairie grasses.  Rain gardens are most effective in specific areas and it may not be possible to place one in front of every home.  The Village is soliciting requests for rain gardens during the design phase and will contact those who are selected.

 


Swales

swales

Swales are landscaped with regular turf grass and are not able to absorb as much water or pollutants as the rain garden plantings; however, they require less maintenance than rain gardens.







Pavement Edge Treatment

pavement edge treatment

All streets will be lined with concrete curb and gutter to maintain consistency throughout the Village. This will also help channelize runoff from driveways, sidewalks, and the pavement (during heavier storm events), and direct the stormwater to bio-infiltration areas in the parkways for infiltration and treatment.