01-22-1997 Council Agenda - Laserfiche WebLink

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Lindemann asked if there were any questions from the residents. One resident asked if the ditch will be an open ditch. It was reported that there will be a swale above the pipe. A resident pointed out the Stoneridge development which is under construction, and asked how drainage will be handled from this area. It was reported that a detention basin is being installed as part of the Stoneridge development; however, a 6" rainfall will create excess water. By drying the ditch up between storm events, this will create system capacity that doesn't currently exist due to sedimentation and grade problems. Another resident stated that some of the corrugated metal pipe is galvanized and should be in good condition. He questioned the need to replace it. Aichinger explained that existing culverts are not set at proper grade which contributes to the problem. It was further explained that once the drainage improvements are completed, the property will be restored to its original condition. One resident noted the existence of an 8 -year perennial garden. Aichinger reported that the owner should salvage as much garden materials as possible as since they don't typically do that kind of restoration. He also explained the Watershed's rights within the ditch banks. McCumber pointed out that there are sheds, concrete, etc. in the areas surrounding the ditch. The Watershed indicated they will work with residents to identify conflicts when plans and specs are completed. There were comments about the City's involvement in the initial placement of the culvert, and one resident alleged that the City said the ditch was a WPA project which may have been abandoned. He stated the City set the grade for the culvert and specified materials. Aichinger explained the City may not have understood the ownership issues involved with the ditch at that time, and again emphasized that corrections are needed to put this drainage system into proper condition. The Watershed indicated that the culverts at Westwind and Windrow are likely to be replaced since they are heaving. If replacement occurs, pipe will be installed under the roadway and drain tile will also be installed to address problems in this area. Even though pipe will flow north in the vicinity of Westwind, the ditch itself will still flow to the south. A resident asked about water backing up in his yard during many rainfalls. Lindemann stated that back -up situations will be improved over current conditions. The Watershed reported that a 3 1/2" rain event within a 24 hour 2 Page 26