06/12/12 - Laserfiche WebLink

Home

CC Regular Session 7. 3. Meeting Date: 06/12/2012 Submitted For: Tim Himmer By: Len Linton, Engineering/Public Works Information Title: Consider Stormwater Improvements on 148th Lane NW and149th Lane NW, and Approve Change Orders for City Improvement Project 12-24 Background: Last summer the City experienced several significant rainfall events that lead to many localized flooding concerns and resident complaints. The large volumes of precipitation that occurred over a short period of time appears to have elevated the groundwater within areas of the City, and prohibited the generous rate of infiltration that typically takes place in the Anoka sand plain. Throughout the summer and fall staff worked hard at registering and responding to the calls, and evaluating the situations on an individual basis to determine whether quick fixes could be implemented (culvert obstructions, re -ditching, etc.) to alleviate the immediate concerns. This item was discussed at the Public Works Committee on August 15, 2011, and at that time staff summarized the areas of concern that were being investigated based upon citizen complaints received. A summary was presented that outlined the concern identified, actions steps to evaluate the concern, additional investigations that would be necessary to fully understand the situation, and recommendations for specific projects that could be implemented rather quickly and inexpensively. At that time staff classified the issues into 3 categories: 1. Those that required no further action. They were evaluated and corrected, or did not need correcting because the water was fully contained within dedicated drainage & utility easements (functioning as designed). 2. Those that required additional investigation and evaluation before deciding on a long term solution, and implementing corrective actions. 3. Those that had an identified recommendation for immediate action. At that meeting the Committee briefly discussed the areas of concern, and directed staff to prepare plans and specifications for the items identified in category 3. Once this direction was ratified by the City Council on September 13, 2011, and the plans completed, it was too late in the season to secure bids and complete the improvements in 2011. It was then decided to delay construction until 2012, where some of the improvements could be completed by inclusion in a larger stormwater improvement plan set. Staff finalized plans for all these items, including incorporation of additional items that were approved at the Public Works Committee meeting in March of 2012, and bid them under two separate contracts, which were awarded by the City Council on May 22, 2012. The final three areas of flooding concern from 2011 were discussed by the Public Works Committee on May 15, 2012, with the recommendation being to perform corrective actions on all three this year. These items were included in the report from Public Works on the consent agenda earlier this evening, and include the Rum River Hills Gold Course, 148th Lane NW, and 149th Lane NW. City staff has prepared plan sheets for the corrective actions contemplated for both 148th Lane and 149th Lane, and has received quotes from the two storm sewer improvement contractors that are already working in the City. The Rum River Hills Gold Course will be handled as a separate case on this evenings agenda. Notification: The property owners that may be affected by these project were notified of the meeting and have received a copy of the agenda. Observations: