Title
Parkview Estates (Villa West) Stage 2 Storm Water Improvement - Recommendation
History
In 2014 the Village Board approved the Stage 2, Phase I & II engineering for storm water improvements to further minimize the risk of flooding in the Parkview Estates Subdivision. The Stage 2 improvement is in conjunction with the improvements currently under construction as part of Stage 1. The Stage 2 improvements are also intended to improve storm water issues currently experienced in the Caro Vista Subdivision.
Christopher B. Burke Engineering, Ltd. (CBBEL) has completed the hydrologic and hydraulic analysis. The results of the analysis determined that additional storage and conveyance to a regional storage pond, constructed in the Evergreen View Park property, would provide the added level of protection required. Also taken into consideration, was the undetained storm water from the west portion of the watershed including the Clearview Estates Subdivision. While no structure flooding occurs in this area, the undetained flow has a direct impact on the same tributary to Mill Creek.
Two pond options were analyzed to determine the cost and benefit to both Parkview and Caro Vista Ponds (Memorandum attached). Option A includes the construction of a 28 acre foot dry bottom pond and 36” conveyance pipe from Caro Vista Pond and an 18” pipe from the ComEd ROW south of 138th Place at an estimated cost of $5,750,000. This option provides the requested level of protection to the Caro Vista Subdivision and further improves the conditions in the Parkview Estates Subdivision (Exhibit 1 Attached). Option B increases the size of the storm water storage to 35 acre feet with the same pipe conveyance at an estimated cost of $6,750,000 (Exhibit 2 attached). No additional benefit is obtained for the Caro Vista or Parkview areas. The benefit of the additional storage capacity is only obtained if additional pipe conveyance is added from the Clearview Subdivision area. Since ...
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