01/03/2012 Council Packet - Laserfiche WebLink

Home Search

PHASE No.1: A. STREET IMPROVEMENTS: The proposed street will consist of five -lanes including turn lanes through the first intersection, approximately 285 feet north. The road width will be 70 -feet with concrete curb and gutter. A concrete median will be installed from Main Street to the south side of the new intersection. The street section includes 11- inches of bituminous pavement, 11- inches of Class 5 aggregate base, and 18- inches of select granular borrow sub -base. The pavement design is consistent with the design south of Main Street and review of the current soil borings which provides for that commercial area. Soil borings showed the necessity to have an 18 -inch sand layer under the pavement section. A 32 -foot Business street access will be constructed both east and west to the right -of -way with the City Standard street section. B. TRAFFIC SIGNAL MODIFICATIONS: The addition of Otter Lake Road as the fourth leg of Main Street and Otter Lake Road intersection will require modifications of the existing traffic signal. All four traffic poles are currently in place. Modifications include adding one mast arm, signal heads for the new southbound traffic and including east/west turning movements north, the addition of an emergency vehicle preemption (EVP), and loop detectors. Minor work will include the installation of handholes, conduit, cables and pavement markings. New pedestrian ramps will be necessary to meet all PROWAG (Pedestrian Right Of Way Access Guidelines) requirements. C. STORM SEWER AND STORM WATER TREATMENT IMPROVMENTS: It is proposed to direct the water from the Main Street connection to the north end of the road. The roadway runoff will be collected by installing catch basins at the north end of the road and routing the storm water through a 15 -inch storm sewer pipe. The pipe will discharge into a temporary pond constructed in the right -of -way. This pond will be relocated with the future extension of the road. Initial coordination with Rice Creek Watershed District (RCWD) has already taken place. A RCWD Water/Wetland Project permit will be required which will address sequencing and mitigation for all three Phases. Page 5 14817.004