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Lake Johanna Boulevard Trail Design Study Preliminary Design Development Report 18 September 27, 2022 zone will be provided on both sides of the trail. Connections to sidewalks and trails at intersecting streets are proposed throughout the corridor. In areas where right-of-way, private landscaping or topography constraints exist, the trail alignment could be shifted closer to the roadway by reduction of the 6-foot turf boulevard to a 2-foot paved maintenance strip directly abutting the surmountable curb. Public Utility Improvements The existing roadway corridor includes watermain and sanitary sewer infrastructure to serve abutting properties. Existing hydrants in the corridor will need to be reviewed with City of Arden Hills staff and relocated as necessary to accommodate the new curb line and trail clear zone. Existing sanitary sewer infrastructure, including Lift Station #5 (near County Road E) and Lift Station #3 (north shore of Lake Johanna), is not anticipated to be impacted by the project based on the current design concepts. Private Utility Improvements The existing corridor includes overhead power and communications lines along the entire length as well as underground gas, electric and communications facilities. Relocation of power poles and overhead wires required as a part of the roadway and trail construction will be completed by Xcel Energy at no cost to the project provided the infrastructure remains overhead. Storm Drainage Improvements The existing storm drainage infrastructure in the corridor does not provide adequate drainage in many storm events. The conversion of the roadway from a rural section to an urban curbed section will necessitate the inclusion of storm sewer catch basins and supporting infrastructure. The proposed roadway improvements include storm sewer catch basins, manholes, culverts and ditches to route stormwater runoff to water quality infrastructure as well as manage drainage and alleviate existing nuisance flooding issue areas that may exist. Water Quality Improvements The proposed roadway and trail improvements anticipate a slight reduction in impervious area compared to existing conditions. The City of Arden Hills stormwater regulations refer to Rice Creek Watershed District rules, which are triggered for linear projects by the creation or reconstruction of one or more acres of impervious surface. Therefore, the project as currently planned may not be required to install stormwater quality infrastructure. However, the concept layout plans have included potential areas that could be utilized for stormwater management if the project design results in additional impervious surfaces such that watershed rules are triggered or the City and County desire to provide water quality infrastructure regardless of regulatory requirements. Landscaping Improvements Proposed landscaping improvements along the corridor may include replacement screening for private properties, boulevard trees and planting areas at intersections, water quality areas or other areas to enhance existing vegetation, create visual interest and enhance the effectiveness of water quality areas. Streetlighting Improvements The preliminary plans have identified potential pedestrian scale streetlighting which could be constructed along the corridor within the 6-foot turf boulevard. A final decision on whether continuous streetlighting is incorporated into the project will be made by the city of Arden Hills. Right-of-Way Acquisition The proposed improvements are depicted within existing Ramsey County right-of-way. The concept plans have not included construction limits however the scope of right-of-way acquisition is not anticipated to be significant and