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(it; N iej1 j s0' 3A ry <br /> CONSULTING ENGINEERS <br /> 11(111 <br /> Maier Stewart Associates Inc. <br /> August 11, 1993 <br /> File: 330 028 -30 <br /> asG 1 2 1993 <br /> Ms. Susan Hoyt <br /> Administrator <br /> City of Falcon Heights <br /> 2077 Larpenteur Avenue West <br /> Falcon Heights, MN 55113 <br /> RE: THE HOYT /FOLWELL STORM SEWER <br /> Dear Ms. Hoyt: <br /> Last Monday, I had an opportunity to review the existing storm sewer situation between Hoyt <br /> and Folwell Avenues with Vince Wright. Based on the information that Vince was able to <br /> provide, it appears that this sewer system may be undersized to handle some of the large intensity <br /> rains we have experienced this summer. However, I do believe there are some minor <br /> improvements we could make to this system which would increase the efficiency of it and <br /> eliminate some of the minor flooding issues that have been experienced by the property on the <br /> south side of Folwell Avenue. I would suggest the City consider the following improvements: <br /> 1. Eliminate the driveway apron on the south side of Folwell Avenue and replace it with a <br /> barrier type concrete curb and gutter. This will allow water to remain in the street to a <br /> height of approximately 6 -12 inches prior to backing up into the property adjacent to the <br /> road. <br /> 2. Replace the catch basin castings on the existing structures in Folwell Avenue with larger, <br /> more efficient grates. <br /> 3. Install a catch basin south of Folwell Avenue on the bituminous pathway in the area that <br /> currently is low and collects water and mud because it has no place for the water to run. <br /> 4. Replace the catch basin castings on the existing structures in Hoyt Avenue, again to <br /> increase the efficiency of these structures to take water in. <br /> I believe that these minor improvements would increase the ability of the storm sewer system to <br /> handle small rainfall events. In the case of a larger rainfall event like we've experienced this <br /> summer, we will likely still see some isolated ponding, but it should be of a shorter duration and <br /> be confined to areas where the storm sewer can eventually convey the water away. <br /> 1959 SLOAN PLACE, SUITE 200, ST PAUL, MINNESOTA 55117 612 774 -6021 <br /> 9800 SHELARD PARKWAY, SUITE 102, MINNEAPOLIS, MINNESOTA 55441 612 546 -0432 Equal Opportunity Employer <br />