06-10-2024 Council Meeting Packet

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Feasibility Report 2024 / 2025 Street Reconstruction and Municipal Sewer and Water Extension Project Pine Haven City of Lino Lakes, MN WSB Project No. 023620-000 Page 3 3. Existing Conditions3.1. Streets The roadway condition of 81st Street, Danube Street, and Elbe Street includes various severities of distress including delamination and potholes, minor alligator, block, transverse, and longitudinal cracking, along with a few localized drainage issues. The roadway is approximately 47 years old is generally 30 feet wide and has rolled bituminous curb that has diminished over time. Danube Street is a cul-du-sac that has a 46 foot wide radius, which is the City’s standard. 81st Street, Danube Street, and Elbe Street are within a 60-foot wide right of way. The total length of roadway improvements for the streets in the Pine Haven Neighborhood included with this project is approximately 0.42 miles. 2024 Street Reconstruction Project Existing Conditions Street Segment From To Length Existing Width 81st Street Lake Drive Elbe Street 700’ 30’ Danube Street 81st Street Cul-de-Sac 500’ 30’ Elbe Street Highway 14 Dead End 965’ 30’ 3.2. Drainage There are 2 main drainage areas in the Pine Haven neighborhood and the project encompasses 19 acres of la nd. Street runoff flows along the sides of the pavement and into the grass and low areas or is collected by the existing storm sewer drains at the southerly end of Danube Street or Elbe Street. There is an existing 20 foot wide drainage and utility easement between 8016 and 8020 Danube Street and 897 and 915 Main Street. Within the easement is the existing storm sewer system. The storm system conveys water from the southerly end of Danube Street and outlets /connects to storm sewer system in Main Street. Similarly the existing storm sewer system coveys water to from Elbe Street into the Main Street system. The Main Street system is Anoka’s system. 3.3. Utilities 3.3.1. Sanitary Sewer The properties along 81st Street, Danube Street, and Elbe Street are served by onsite septic systems. Some of the septic systems are drain fields while others are mound systems. There is an existing 15-inch diameter PVC sanitary sewer mainline that runs along the easterly side of Lake Drive, from the intersection of Main Street to approximately 600-feet northeast, with the as- built dated 2013. There are 2 of the 30 onsite septic systems that have been replaced within the last 10 years. The majority of septic systems appear to be installed at the same time the home was constructed. Septic systems installed around this time typically have a 35 to 40 year lifespan. 3.3.2. Watermain The 81st Street, Danube Street, and Elbe Street properties are served by private wells. There is an e xisting 12-inch diameter DIP watermain that is parallel to the existing sanitary sewer trunk line and runs along the easterly side of Lake Drive, from the intersection of Main Street to approximately 600-feet northeast, with the as-built dated 2013. Existing wells are typically 348