Memo to Park Board
As noted in the Board’s January 29 Update, following the Board's storm water discussion and direction on January 27, a letter (see attached) was sent to the City reiterating the Board's position along with V3's responses to the City's questions.
Thereafter, as noted via email on Tuesday, February 2, at their meeting on February 1, the City Council agreed by a vote of 9:4, to reconsider the York Commons Stormwater Intergovernmental Agreement, with the valve, at their next meeting on February 16.
As regards to Golden Meadows, the City’s Public Works Committee will be discussing the District’s proposal for the site at its meeting on Monday, February 8. Attached is two exhibits being provided to the Committee concerning Golden Meadows and one for York Commons.
The next subcommittee meeting will be held Thursday, February 18 at 7 p.m. at City Hall.
Stormwater Management at Park Board Meeting
Executive Director Rogers updated the Board on stormwater management discussions with the City of Elmhurst. On February 1, 2016, the City agreed to reconsider the shut-off valve as part of the proposed York Commons intergovernmental agreement (IGA) detention basin at its next meeting on February 16.
Regarding discussions on the detention basin at Golden Meadows Park, the City's Public Works Committee met on February 8 when they also discussed York Commons. Commissioner Graf and Executive Director Rogers were in attendance. City Manager Grabowski summarized the newly drafted IGA and explained the compensation component sought by the District to the committee.
Executive Director Rogers displayed a spreadsheet with the number of homes relieved from the 100-year flood based on the proposed stormwater sites. According to the spreadsheet, the York Commons detention basin would relieve flooding for 38 homes, thus equating to $37,000 per home for a total cost of $1.4 million. Commissioner Graf stated that the committee has discussed the overflow of stormwater and it was made clear that the overflow would go onto York Street. According to the committee, the amount of water that would flow onto York Street during a 500-year storm at its highest mark would be 16,000 gallons per minute. Therefore, a shut-off valve would be beneficial. Commissioner Spaeth stated he hoped the York Commons project can begin soon as the goal is to help residents without transferring the problem to another area. The best solution for the problem is improved infrastructure.
Executive Director Rogers stated that the City Engineer indicated that the City is looking to pursue options in regards to compensatory storage, specifically for southwest Elmhurst. Commissioner Graf added the proposed detention would help the homes on Washington Street, whereas above-ground detention would not be an option due to Washington Street being at a lower elevation. Commissioner Graf continued by stating that Alderman Bram had asked about not seeing a plan for the infrastructure. It was also mentioned that the City has had discussions with DuPage County on compensatory storage but no firm plans.
The detention basin at Golden Meadows Park would provide relief to 20 homes. Executive Director Rogers displayed the conceptual detention site and how stormwater would travel from nearby streets into the basin.
Regarding the proposed East End Park detention site, the number of homes affected by the 100-year storm has been reduced due to the City acquiring four of the nine homes, which the District had suggested previously. The City has requested the District seek approval from the IL Dept. of Natural Resources (IDNR) to use Golden Meadows and East End parks for stormwater detention without compensation.
The Board questioned the commitment to allowing the use of property at Wild Meadows Trace to relieve flooding for four homes. Commissioner Spaeth provided the idea of a parking lot with underground storage. Executive Director Rogers stated that the District is currently waiting to hear back from the City regarding York Commons and Golden Meadows parks. Until then, the Park Board can consider the concepts discussed, look for creative alternatives, and the compensation for the proposed sites.