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HomeMy WebLinkAbout1.COW Agenda 09/22/2015COMMITTEE OF THE WHOLE AGENDA Meeting Location: Mount Prospect Village Hall 50 S. Emerson CALL TO ORDER - ROLL CALL Meeting Date and Time: Tuesday, September 22, 2015 7:00 p.m. Mayor Arlene A. Juracek Trustee Paul Hoefert Trustee Richard Rogers Trustee John Matuszak Trustee Colleen Saccotelli Trustee Steven Polit Trustee Michael Zadel APPROVAL OF MINUTES OF THE COMMITTEE OF THE WHOLE FOR SEPTEMBER 8, 2015 CITIZENS TO BE HEARD IV. LEVEE 37 DRAINAGE STUDY REPORT Levee 37 was constructed by the United States Army Corps of Engineers to prevent Des Plaines River flood waters from inundating properties west of River Road in Mount Prospect (the village) and Prospect Heights. The Mount Prospect portion of the levee system features two (2) pump stations (pump stations #1 and #2). These pump stations facilitate release of water from the storm sewer system when high river levels restrict the normal gravity discharge of the storm sewer system. During high river level events, check valves close to prevent river water from inundating adjacent properties via the storm sewer system. This modus was the cause of record flooding during high river level events in 1986 and 1987. The check valves were installed in 1991 and have proven highly effective at preventing river water inundation. Levee 37 was constructed in 2011. A principle assumption applied to the design of the pump stations was that the coincidence of high river levels (tailwater) and significant rainfall on the land side of the levee system was extremely remote. This assumption was based on analysis of rainfall data and river levels recorded prior to 1990. As a consequence, the pump stations were designed to primarily rely on normal gravity discharge to dewater the storm sewer system. Unfortunately, on dozens of occasions, properties west of River Road have experienced flooding due to the inability of the gravity discharge and pump stations to release water to the Des Plaines River at a sufficient rate. On all of these occasions, the storm sewer gravity discharge has been occluded by tailwater in the river while the land side of the levee has simultaneously been subject to heavy rains. Earlier this summer the village hired Christopher B. Burke Engineering, LTD. (CBBEL) of Rosemont, Illinois, an engineering consulting firm with expertise in stormwater management, to examine existing conditions and develop recommendations to improve the performance of storm sewer systems tributary to Levee 37. Their work has culminated in a final report available for viewing and download on the village website ( .mount iro sector lleveedraina + ). Representatives from CBBEL, along with Public Works Department staff, will present the final report's findings and facilitate discussion. V. MANAGER'S REPORT o Status VI. ANY OTHER BUSINESS VII. ADJOURNMENT NOTE: ANY INDIVIDUAL WHO WOULD LIKE TO ATTEND THIS MEETING BUT BECAUSE OF A DISABILITY NEEDS SOME ACCOMMODATION TO PARTICIPATE, SHOULD CONTACT THE VILLAGE MANAGER'S OFFICE AT 50 SOUTH EMERSON, MOUNT PROSPECT, ILLINOIS 60056, 847/392-6000, EXTENSION 5327 OA